home *** CD-ROM | disk | FTP | other *** search
/ Forum of Incident Response & Security Teams / Forum_of_Incident_Response_and_Security_Teams_FIRST_October_1994.iso / papers / crypto / eesproto.ps < prev    next >
Text File  |  1994-06-26  |  145KB  |  1,988 lines
  1. %!PS-Adobe-2.0
  2. %%Creator: dvipsk 5.490s Copyright 1986, 1992 Radical Eye Software
  3. %%Pages: 10 1
  4. %%BoundingBox: 0 0 612 792
  5. %%EndComments
  6. %DVIPSCommandLine: dvips -f
  7. %%BeginProcSet: tex.pro
  8. %!
  9. /TeXDict 250 dict def TeXDict begin /N{def}def /B{bind def}N /S{exch}N /X{S N}
  10. B /TR{translate}N /isls false N /vsize 11 72 mul N /@rigin{isls{[0 -1 1 0 0 0]
  11. concat}if 72 Resolution div 72 VResolution div neg scale isls{Resolution hsize
  12. -72 div mul 0 TR}if Resolution VResolution vsize -72 div 1 add mul TR matrix
  13. currentmatrix dup dup 4 get round 4 exch put dup dup 5 get round 5 exch put
  14. setmatrix}N /@landscape{/isls true N}B /@manualfeed{statusdict /manualfeed
  15. true put}B /@copies{/#copies X}B /FMat[1 0 0 -1 0 0]N /FBB[0 0 0 0]N /nn 0 N
  16. /IE 0 N /ctr 0 N /df-tail{/nn 8 dict N nn begin /FontType 3 N /FontMatrix
  17. fntrx N /FontBBox FBB N string /base X array /BitMaps X /BuildChar{
  18. CharBuilder}N /Encoding IE N end dup{/foo setfont}2 array copy cvx N load 0 nn
  19. put /ctr 0 N[}B /df{/sf 1 N /fntrx FMat N df-tail}B /dfs{div /sf X /fntrx[sf 0
  20. 0 sf neg 0 0]N df-tail}B /E{pop nn dup definefont setfont}B /ch-width{ch-data
  21. dup length 5 sub get}B /ch-height{ch-data dup length 4 sub get}B /ch-xoff{128
  22. ch-data dup length 3 sub get sub}B /ch-yoff{ch-data dup length 2 sub get 127
  23. sub}B /ch-dx{ch-data dup length 1 sub get}B /ch-image{ch-data dup type
  24. /stringtype ne{ctr get /ctr ctr 1 add N}if}B /id 0 N /rw 0 N /rc 0 N /gp 0 N
  25. /cp 0 N /G 0 N /sf 0 N /CharBuilder{save 3 1 roll S dup /base get 2 index get
  26. S /BitMaps get S get /ch-data X pop /ctr 0 N ch-dx 0 ch-xoff ch-yoff ch-height
  27. sub ch-xoff ch-width add ch-yoff setcachedevice ch-width ch-height true[1 0 0
  28. -1 -.1 ch-xoff sub ch-yoff .1 add]{ch-image}imagemask restore}B /D{/cc X dup
  29. type /stringtype ne{]}if nn /base get cc ctr put nn /BitMaps get S ctr S sf 1
  30. ne{dup dup length 1 sub dup 2 index S get sf div put}if put /ctr ctr 1 add N}
  31. B /I{cc 1 add D}B /bop{userdict /bop-hook known{bop-hook}if /SI save N @rigin
  32. 0 0 moveto /V matrix currentmatrix dup 1 get dup mul exch 0 get dup mul add
  33. .99 lt{/FV}{/RV}ifelse load def pop}N /eop{SI restore showpage userdict
  34. /eop-hook known{eop-hook}if}N /@start{userdict /start-hook known{start-hook}
  35. if /VResolution X /Resolution X 1000 div /DVImag X /IE 256 array N 0 1 255{IE
  36. S 1 string dup 0 3 index put cvn put}for 65781.76 div /vsize X 65781.76 div
  37. /hsize X}N /p{show}N /RMat[1 0 0 -1 0 0]N /BDot 260 string N /rulex 0 N /ruley
  38. 0 N /v{/ruley X /rulex X V}B /V{}B /RV statusdict begin /product where{pop
  39. product dup length 7 ge{0 7 getinterval dup(Display)eq exch 0 4 getinterval
  40. (NeXT)eq or}{pop false}ifelse}{false}ifelse end{{gsave TR -.1 -.1 TR 1 1 scale
  41. rulex ruley false RMat{BDot}imagemask grestore}}{{gsave TR -.1 -.1 TR rulex
  42. ruley scale 1 1 false RMat{BDot}imagemask grestore}}ifelse B /FV{gsave
  43. transform round exch round exch itransform moveto rulex 0 rlineto 0 ruley neg
  44. rlineto rulex neg 0 rlineto fill grestore}B /a{moveto}B /delta 0 N /tail{dup
  45. /delta X 0 rmoveto}B /M{S p delta add tail}B /b{S p tail}B /c{-4 M}B /d{-3 M}
  46. B /e{-2 M}B /f{-1 M}B /g{0 M}B /h{1 M}B /i{2 M}B /j{3 M}B /k{4 M}B /w{0
  47. rmoveto}B /l{p -4 w}B /m{p -3 w}B /n{p -2 w}B /o{p -1 w}B /q{p 1 w}B /r{p 2 w}
  48. B /s{p 3 w}B /t{p 4 w}B /x{0 S rmoveto}B /y{3 2 roll p a}B /bos{/SS save N}B
  49. /eos{SS restore}B end
  50. %%EndProcSet
  51. %%BeginProcSet: special.pro
  52. %!
  53. TeXDict begin /SDict 200 dict N SDict begin /@SpecialDefaults{/hs 612 N /vs
  54. 792 N /ho 0 N /vo 0 N /hsc 1 N /vsc 1 N /ang 0 N /CLIP 0 N /rwiSeen false N
  55. /rhiSeen false N /letter{}N /note{}N /a4{}N /legal{}N}B /@scaleunit 100 N
  56. /@hscale{@scaleunit div /hsc X}B /@vscale{@scaleunit div /vsc X}B /@hsize{/hs
  57. X /CLIP 1 N}B /@vsize{/vs X /CLIP 1 N}B /@clip{/CLIP 2 N}B /@hoffset{/ho X}B
  58. /@voffset{/vo X}B /@angle{/ang X}B /@rwi{10 div /rwi X /rwiSeen true N}B /@rhi
  59. {10 div /rhi X /rhiSeen true N}B /@llx{/llx X}B /@lly{/lly X}B /@urx{/urx X}B
  60. /@ury{/ury X}B /magscale true def end /@MacSetUp{userdict /md known{userdict
  61. /md get type /dicttype eq{userdict begin md length 10 add md maxlength ge{/md
  62. md dup length 20 add dict copy def}if end md begin /letter{}N /note{}N /legal{
  63. }N /od{txpose 1 0 mtx defaultmatrix dtransform S atan/pa X newpath clippath
  64. mark{transform{itransform moveto}}{transform{itransform lineto}}{6 -2 roll
  65. transform 6 -2 roll transform 6 -2 roll transform{itransform 6 2 roll
  66. itransform 6 2 roll itransform 6 2 roll curveto}}{{closepath}}pathforall
  67. newpath counttomark array astore /gc xdf pop ct 39 0 put 10 fz 0 fs 2
  68. F/|______Courier fnt invertflag{PaintBlack}if}N /txpose{pxs pys scale ppr
  69. aload pop por{noflips{pop S neg S TR pop 1 -1 scale}if xflip yflip and{pop S
  70. neg S TR 180 rotate 1 -1 scale ppr 3 get ppr 1 get neg sub neg ppr 2 get ppr 0
  71. get neg sub neg TR}if xflip yflip not and{pop S neg S TR pop 180 rotate ppr 3
  72. get ppr 1 get neg sub neg 0 TR}if yflip xflip not and{ppr 1 get neg ppr 0 get
  73. neg TR}if}{noflips{TR pop pop 270 rotate 1 -1 scale}if xflip yflip and{TR pop
  74. pop 90 rotate 1 -1 scale ppr 3 get ppr 1 get neg sub neg ppr 2 get ppr 0 get
  75. neg sub neg TR}if xflip yflip not and{TR pop pop 90 rotate ppr 3 get ppr 1 get
  76. neg sub neg 0 TR}if yflip xflip not and{TR pop pop 270 rotate ppr 2 get ppr 0
  77. get neg sub neg 0 S TR}if}ifelse scaleby96{ppr aload pop 4 -1 roll add 2 div 3
  78. 1 roll add 2 div 2 copy TR .96 dup scale neg S neg S TR}if}N /cp{pop pop
  79. showpage pm restore}N end}if}if}N /normalscale{Resolution 72 div VResolution
  80. 72 div neg scale magscale{DVImag dup scale}if 0 setgray}N /psfts{S 65781.76
  81. div N}N /startTexFig{/psf$SavedState save N userdict maxlength dict begin
  82. /magscale false def normalscale currentpoint TR /psf$ury psfts /psf$urx psfts
  83. /psf$lly psfts /psf$llx psfts /psf$y psfts /psf$x psfts currentpoint /psf$cy X
  84. /psf$cx X /psf$sx psf$x psf$urx psf$llx sub div N /psf$sy psf$y psf$ury
  85. psf$lly sub div N psf$sx psf$sy scale psf$cx psf$sx div psf$llx sub psf$cy
  86. psf$sy div psf$ury sub TR /showpage{}N /erasepage{}N /copypage{}N /p 3 def
  87. @MacSetUp}N /doclip{psf$llx psf$lly psf$urx psf$ury currentpoint 6 2 roll
  88. newpath 4 copy 4 2 roll moveto 6 -1 roll S lineto S lineto S lineto closepath
  89. clip newpath moveto}N /endTexFig{end psf$SavedState restore}N /@beginspecial{
  90. SDict begin /SpecialSave save N gsave normalscale currentpoint TR
  91. @SpecialDefaults count /ocount X /dcount countdictstack N}N /@setspecial{CLIP
  92. 1 eq{newpath 0 0 moveto hs 0 rlineto 0 vs rlineto hs neg 0 rlineto closepath
  93. clip}if ho vo TR hsc vsc scale ang rotate rwiSeen{rwi urx llx sub div rhiSeen{
  94. rhi ury lly sub div}{dup}ifelse scale llx neg lly neg TR}{rhiSeen{rhi ury lly
  95. sub div dup scale llx neg lly neg TR}if}ifelse CLIP 2 eq{newpath llx lly
  96. moveto urx lly lineto urx ury lineto llx ury lineto closepath clip}if
  97. /showpage{}N /erasepage{}N /copypage{}N newpath}N /@endspecial{count ocount
  98. sub{pop}repeat countdictstack dcount sub{end}repeat grestore SpecialSave
  99. restore end}N /@defspecial{SDict begin}N /@fedspecial{end}B /li{lineto}B /rl{
  100. rlineto}B /rc{rcurveto}B /np{/SaveX currentpoint /SaveY X N 1 setlinecap
  101. newpath}N /st{stroke SaveX SaveY moveto}N /fil{fill SaveX SaveY moveto}N
  102. /ellipse{/endangle X /startangle X /yrad X /xrad X /savematrix matrix
  103. currentmatrix N TR xrad yrad scale 0 0 1 startangle endangle arc savematrix
  104. setmatrix}N end
  105. %%EndProcSet
  106. TeXDict begin 40258431 52099146 1000 300 300 @start /Fa 3 113
  107. df<01800180018001800180C183F18F399C0FF003C003C00FF0399CF18FC18301800180018001
  108. 80018010147D9417>3 D<03C00FF01FF83FFC7FFE7FFEFFFFFFFFFFFFFFFFFFFFFFFF7FFE7FFE
  109. 3FFC1FF80FF003C010127D9317>15 D<0000000008000000001800000000300000000030000000
  110. 0060000000006000000000C000000000C000000001800000000180000000030000000003000000
  111. 00060000000006000000000C000000000C00000000180000000018000000003000000000300000
  112. 000060000000006000000000C000060000C0001E000180002F000180004F000300008780030000
  113. 078006000003C006000003C00C000003C00C000001E018000001E018000000F030000000F03000
  114. 0000786000000078600000003CC00000003CC00000001F800000001F800000000F000000000F00
  115. 000000060000000006000000252E7E8126>112 D E /Fb 1 50 df<0C003C00CC000C000C000C
  116. 000C000C000C000C000C000C000C000C000C00FF8009107E8F0F>49 D E
  117. /Fc 5 57 df<03000700FF00070007000700070007000700070007000700070007000700070007
  118. 000700070007007FF00C157E9412>49 D<0F8030E040708030C038E03840380038007000700060
  119. 00C00180030006000C08080810183FF07FF0FFF00D157E9412>I<20303FE03FC0240020002000
  120. 200020002F8030E020700030003800384038E038E0388030406020C01F000D157E9412>53
  121. D<01F00608080C181C301C70006000E000E3E0EC30F018F00CE00EE00EE00E600E600E300C3018
  122. 183007C00F157F9412>I<07E018302018600C600C700C78183E101F600FC00FF018F8607C601E
  123. C00EC006C006C004600C38300FE00F157F9412>56 D E /Fd 2 111 df<000100030003000600
  124. 060006000C000C000C00180018001800300030003000600060006000C000C000C0018001800180
  125. 0300030003000600060006000C000C000C00180018001800300030003000600060006000C000C0
  126. 00C000102D7DA117>61 D<1E07802318C023A06043C0704380704380708700E00700E00700E007
  127. 00E00E01C00E01C00E01C00E03821C03841C07041C07081C03083803101801E017147E931B>
  128. 110 D E /Fe 27 118 df<0018007000E001C00380038007000E000E001E001C003C003C007800
  129. 780078007800F800F000F000F000F000F000F000F000F000F000F80078007800780078003C003C
  130. 001C001E000E000E0007000380038001C000E0007000180D2D7DA114>40
  131. D<C000700038001C000E000E0007000380038003C001C001E001E000F000F000F000F000F80078
  132. 0078007800780078007800780078007800F800F000F000F000F001E001E001C003C00380038007
  133. 000E000E001C0038007000C0000D2D7DA114>I<387CFEFEFE7C3807077C860F>46
  134. D<00E00001E0000FE000FFE000F3E00003E00003E00003E00003E00003E00003E00003E00003E0
  135. 0003E00003E00003E00003E00003E00003E00003E00003E00003E00003E00003E00003E00003E0
  136. 0003E000FFFF80FFFF80111D7C9C1A>49 D<07F0001FFE00383F007C1F80FE0FC0FE0FC0FE0FE0
  137. FE07E07C07E03807E0000FE0000FC0000FC0001F80001F00003E0000780000F00000E00001C000
  138. 0380600700600E00601C00E01FFFC03FFFC07FFFC0FFFFC0FFFFC0131D7D9C1A>I<01FC0007FF
  139. 000E0F801E0FC03F07E03F07E03F07E03F07E01E0FC0000FC0000F80001F0001FC0001FC00000F
  140. 800007C00003E00003F00003F83803F87C03F8FE03F8FE03F8FE03F0FC03F07807E03C0FC01FFF
  141. 8003FC00151D7E9C1A>I<0001C00003C00007C00007C0000FC0001FC0003BC00073C00063C000
  142. C3C00183C00383C00703C00E03C00C03C01803C03803C07003C0E003C0FFFFFEFFFFFE0007C000
  143. 07C00007C00007C00007C00007C000FFFE00FFFE171D7F9C1A>I<FFFFFE00FFFFFFC007C007E0
  144. 07C003F007C001F807C001FC07C001FC07C001FC07C001FC07C001FC07C001F807C003F807C007
  145. F007C00FE007FFFF8007FFFFC007C003F007C001F807C001FC07C000FC07C000FE07C000FE07C0
  146. 00FE07C000FE07C000FE07C000FC07C001FC07C003F807C007F0FFFFFFE0FFFFFF001F1F7E9E25
  147. >66 D<0007FC02003FFF0E00FE03DE03F000FE07E0003E0FC0001E1F80001E3F00000E3F00000E
  148. 7F0000067E0000067E000006FE000000FE000000FE000000FE000000FE000000FE000000FE0000
  149. 007E0000007E0000067F0000063F0000063F00000C1F80000C0FC0001807E0003803F0007000FE
  150. 01C0003FFF800007FC001F1F7D9E26>I<FFFFFFE0FFFFFFE007E007E007E001E007E000E007E0
  151. 006007E0007007E0003007E0003007E0603007E0603007E0600007E0E00007E1E00007FFE00007
  152. FFE00007E1E00007E0E00007E0600007E0600C07E0600C07E0000C07E0001807E0001807E00018
  153. 07E0003807E0007807E000F807E003F0FFFFFFF0FFFFFFF01E1F7E9E22>69
  154. D<FFFFFFE0FFFFFFE007E007E007E001E007E000E007E0006007E0007007E0003007E0003007E0
  155. 603007E0603007E0600007E0E00007E1E00007FFE00007FFE00007E1E00007E0E00007E0600007
  156. E0600007E0600007E0000007E0000007E0000007E0000007E0000007E0000007E0000007E00000
  157. FFFF8000FFFF80001C1F7E9E21>I<001FF80000FFFF0001F81F8007E007E00FC003F01F8001F8
  158. 1F0000F83F0000FC7F0000FE7E00007E7E00007EFE00007FFE00007FFE00007FFE00007FFE0000
  159. 7FFE00007FFE00007FFE00007FFE00007F7E00007E7F0000FE7F0000FE3F0000FC3F8001FC1F80
  160. 01F80FC003F007E007E001F81F8000FFFF00001FF800201F7D9E27>79 D<07FC001FFF003F0F80
  161. 3F07C03F03E03F03E00C03E00003E0007FE007FBE01F03E03C03E07C03E0F803E0F803E0F803E0
  162. FC05E07E0DE03FF8FE0FE07E17147F9319>97 D<01FE0007FF801F0FC03E0FC03E0FC07C0FC07C
  163. 0300FC0000FC0000FC0000FC0000FC0000FC00007C00007E00003E00603F00C01F81C007FF0001
  164. FC0013147E9317>99 D<0007F80007F80000F80000F80000F80000F80000F80000F80000F80000
  165. F80000F80000F801F8F80FFEF81F83F83E01F87E00F87C00F87C00F8FC00F8FC00F8FC00F8FC00
  166. F8FC00F8FC00F87C00F87C00F87E00F83E01F81F07F80FFEFF03F8FF18207E9F1D>I<01FE0007
  167. FF800F83C01E01E03E00F07C00F07C00F8FC00F8FFFFF8FFFFF8FC0000FC0000FC00007C00007C
  168. 00003E00181E00180F807007FFE000FF8015147F9318>I<01FC3C07FFFE0F079E1E03DE3E03E0
  169. 3E03E03E03E03E03E03E03E01E03C00F07800FFF0009FC001800001800001C00001FFF800FFFF0
  170. 07FFF81FFFFC3C007C70003EF0001EF0001EF0001E78003C78003C3F01F80FFFE001FF00171E7F
  171. 931A>103 D<FF0000FF00001F00001F00001F00001F00001F00001F00001F00001F00001F0000
  172. 1F00001F0FC01F3FE01F61F01FC0F81F80F81F00F81F00F81F00F81F00F81F00F81F00F81F00F8
  173. 1F00F81F00F81F00F81F00F81F00F81F00F8FFE3FFFFE3FF18207D9F1D>I<1C003E007F007F00
  174. 7F003E001C00000000000000000000000000FF00FF001F001F001F001F001F001F001F001F001F
  175. 001F001F001F001F001F001F001F00FFE0FFE00B217EA00E>I<FF0000FF00001F00001F00001F
  176. 00001F00001F00001F00001F00001F00001F00001F00001F01FE1F01FE1F00F01F00C01F03801F
  177. 07001F0C001F18001F7C001FFC001F9E001F0F001E0F801E07C01E03C01E01E01E01F01E00F8FF
  178. C3FFFFC3FF18207E9F1C>107 D<FF00FF001F001F001F001F001F001F001F001F001F001F001F
  179. 001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F00FFE0FFE0
  180. 0B207E9F0E>I<FE0FC0FE3FE01E61F01EC0F81E80F81F00F81F00F81F00F81F00F81F00F81F00
  181. F81F00F81F00F81F00F81F00F81F00F81F00F81F00F8FFE3FFFFE3FF18147D931D>110
  182. D<01FF0007FFC01F83F03E00F83E00F87C007C7C007CFC007EFC007EFC007EFC007EFC007EFC00
  183. 7E7C007C7C007C3E00F83E00F81F83F007FFC001FF0017147F931A>I<FF1FC0FF7FF01FE1F81F
  184. 80FC1F007E1F007E1F003E1F003F1F003F1F003F1F003F1F003F1F003F1F003E1F007E1F007C1F
  185. 80FC1FC1F81F7FE01F1F801F00001F00001F00001F00001F00001F00001F0000FFE000FFE00018
  186. 1D7E931D>I<FE3E00FE7F801ECFC01E8FC01E8FC01F8FC01F03001F00001F00001F00001F0000
  187. 1F00001F00001F00001F00001F00001F00001F0000FFF000FFF00012147E9316>114
  188. D<01800180018003800380038007800F803F80FFFCFFFC0F800F800F800F800F800F800F800F80
  189. 0F800F800F860F860F860F860F8607CC03F801F00F1D7F9C14>116 D<FF07F8FF07F81F00F81F
  190. 00F81F00F81F00F81F00F81F00F81F00F81F00F81F00F81F00F81F00F81F00F81F00F81F01F81F
  191. 01F80F06F807FCFF03F8FF18147D931D>I E /Ff 49 122 df<00FC7C0183C607078E0607040E
  192. 07000E07000E07000E07000E07000E0700FFFFF00E07000E07000E07000E07000E07000E07000E
  193. 07000E07000E07000E07000E07000E07000E07000E07007F0FF0171A809916>11
  194. D<00FC000182000703000607000E02000E00000E00000E00000E00000E0000FFFF000E07000E07
  195. 000E07000E07000E07000E07000E07000E07000E07000E07000E07000E07000E07000E07007F0F
  196. E0131A809915>I<60C0F1E0F9F068D0081008100810102010202040C1800C0B7F9913>34
  197. D<60F0F07010101020204080040B7D830B>44 D<FFC0FFC00A0280880D>I<60F0F06004047D83
  198. 0B>I<03000700FF00070007000700070007000700070007000700070007000700070007000700
  199. 07000700070007000700FFF00C187D9713>49 D<0F80106020304038803CC01CE01C401C003C00
  200. 3800380070006000C001800100020004040804100430083FF87FF8FFF80E187E9713>I<003000
  201. 30007000F000F001700370027004700C7008701070307020704070C070FFFF0070007000700070
  202. 0070007007FF10187F9713>52 D<40007FFE7FFC7FFC4008801080108020004000400080018001
  203. 800100030003000300030007000700070007000700070002000F197E9813>55
  204. D<07801860303070306018E018E018E01CE01CE01C601C603C303C185C0F9C001C001800180038
  205. 70307060604021801F000E187E9713>57 D<000C0000000C0000000C0000001E0000001E000000
  206. 3F000000270000002700000043800000438000004380000081C0000081C0000081C0000100E000
  207. 0100E00001FFE000020070000200700006007800040038000400380008001C0008001C001C001E
  208. 00FF00FFC01A1A7F991D>65 D<003F0201C0C603002E0E001E1C000E1C00063800067800027000
  209. 02700002F00000F00000F00000F00000F00000F000007000027000027800023800041C00041C00
  210. 080E000803003001C0C0003F00171A7E991C>67 D<FFFFF00E00700E00300E00100E00180E0008
  211. 0E00080E00080E04000E04000E04000E0C000FFC000E0C000E04000E04000E04000E00040E0004
  212. 0E00080E00080E00080E00180E00380E0070FFFFF0161A7E991A>69 D<FFFFE00E00E00E00600E
  213. 00200E00300E00100E00100E00100E04000E04000E04000E0C000FFC000E0C000E04000E04000E
  214. 04000E00000E00000E00000E00000E00000E00000E00000E0000FFF000141A7E9919>I<FFE00E
  215. 000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E00
  216. 0E000E000E000E00FFE00B1A7F990E>73 D<1FFC00E000E000E000E000E000E000E000E000E000
  217. E000E000E000E000E000E000E000E000E000E040E0E0E0E0E041C061801E000E1A7D9914>I<FF
  218. E07F800E001E000E0018000E0010000E0020000E0040000E0080000E0100000E0200000E040000
  219. 0E0800000E1C00000E2E00000E4E00000E8700000F0380000E0380000E01C0000E00E0000E00E0
  220. 000E0070000E0070000E0038000E001C000E003E00FFE0FF80191A7E991E>I<FFF0000E00000E
  221. 00000E00000E00000E00000E00000E00000E00000E00000E00000E00000E00000E00000E00000E
  222. 00000E00000E00200E00200E00200E00600E00400E00400E00C00E03C0FFFFC0131A7E9918>I<
  223. FF0003FC0F0003C00F0003C00B8005C00B8005C00B8005C009C009C009C009C009C009C008E011
  224. C008E011C008E011C0087021C0087021C0083841C0083841C0083841C0081C81C0081C81C0081C
  225. 81C0080F01C0080F01C0080F01C0080601C01C0601C0FF861FFC1E1A7E9923>I<FE01FF0F0038
  226. 0F00100B80100B801009C01008E01008E010087010087010083810081C10081C10080E10080E10
  227. 0807100803900803900801D00801D00800F00800700800700800301C0030FF8010181A7E991D>
  228. I<FFFF000E03C00E00E00E00700E00700E00780E00780E00780E00780E00700E00700E00E00E03
  229. C00FFF000E00000E00000E00000E00000E00000E00000E00000E00000E00000E00000E0000FFE0
  230. 00151A7E991A>80 D<0FC21836200E6006C006C002C002C002E00070007E003FE01FF807FC003E
  231. 000E00070003800380038003C002C006E004D81887E0101A7E9915>83 D<7FFFFF00701C070040
  232. 1C0100401C0100C01C0180801C0080801C0080801C0080001C0000001C0000001C0000001C0000
  233. 001C0000001C0000001C0000001C0000001C0000001C0000001C0000001C0000001C0000001C00
  234. 00001C0000001C0000001C000003FFE000191A7F991C>I<FFE1FF0E00380E00100E00100E0010
  235. 0E00100E00100E00100E00100E00100E00100E00100E00100E00100E00100E00100E00100E0010
  236. 0E00100E001006002007002003004001804000C180003E00181A7E991D>I<1830204040804080
  237. 810081008100B160F9F078F030600C0B7B9913>92 D<3F8070C070E020700070007007F01C7030
  238. 707070E070E071E071E0F171FB1E3C10107E8F13>97 D<FC00001C00001C00001C00001C00001C
  239. 00001C00001C00001C00001C00001CF8001F0E001E07001C03801C01801C01C01C01C01C01C01C
  240. 01C01C01C01C01C01C03801C03001E07001B0C0010F000121A7F9915>I<07F80C1C381C300870
  241. 00E000E000E000E000E000E0007000300438080C1807E00E107F8F11>I<007E00000E00000E00
  242. 000E00000E00000E00000E00000E00000E00000E0003CE000C3E00380E00300E00700E00E00E00
  243. E00E00E00E00E00E00E00E00E00E00600E00700E00381E001C2E0007CFC0121A7F9915>I<07C0
  244. 1C3030187018600CE00CFFFCE000E000E000E0006000300438080C1807E00E107F8F11>I<01F0
  245. 031807380E100E000E000E000E000E000E00FFC00E000E000E000E000E000E000E000E000E000E
  246. 000E000E000E000E007FE00D1A80990C>I<0FCE187330307038703870387038303018602FC020
  247. 00600070003FF03FFC1FFE600FC003C003C003C0036006381C07E010187F8F13>I<FC00001C00
  248. 001C00001C00001C00001C00001C00001C00001C00001C00001CF8001D0C001E0E001E0E001C0E
  249. 001C0E001C0E001C0E001C0E001C0E001C0E001C0E001C0E001C0E001C0E00FF9FC0121A7F9915
  250. >I<18003C003C001800000000000000000000000000FC001C001C001C001C001C001C001C001C
  251. 001C001C001C001C001C001C00FF80091A80990A>I<FC00001C00001C00001C00001C00001C00
  252. 001C00001C00001C00001C00001C3F801C1E001C18001C10001C20001C40001DC0001FE0001CE0
  253. 001C70001C78001C38001C1C001C1E001C1F00FF3FC0121A7F9914>107
  254. D<FC001C001C001C001C001C001C001C001C001C001C001C001C001C001C001C001C001C001C00
  255. 1C001C001C001C001C001C00FF80091A80990A>I<FC7C1F001D8E63801E0781C01E0781C01C07
  256. 01C01C0701C01C0701C01C0701C01C0701C01C0701C01C0701C01C0701C01C0701C01C0701C01C
  257. 0701C0FF9FE7F81D107F8F20>I<FCF8001D0C001E0E001E0E001C0E001C0E001C0E001C0E001C
  258. 0E001C0E001C0E001C0E001C0E001C0E001C0E00FF9FC012107F8F15>I<07E01C38300C700E60
  259. 06E007E007E007E007E007E0076006700E381C1C3807E010107F8F13>I<FCF8001F0E001E0700
  260. 1C03801C03801C01C01C01C01C01C01C01C01C01C01C01C01C03801C03001E07001F0C001CF000
  261. 1C00001C00001C00001C00001C00001C0000FF800012177F8F15>I<FCE01D701E701E201C001C
  262. 001C001C001C001C001C001C001C001C001C00FFC00C107F8F0F>114 D<1F2060E04020C020C0
  263. 20F0007F003FC01FE000F080708030C030C020F0408F800C107F8F0F>I<0400040004000C000C
  264. 001C003C00FFC01C001C001C001C001C001C001C001C001C201C201C201C201C200E4003800B17
  265. 7F960F>I<FC7E001C0E001C0E001C0E001C0E001C0E001C0E001C0E001C0E001C0E001C0E001C
  266. 0E001C0E001C1E000C2E0007CFC012107F8F15>I<FF1F803C06001C04001C04001E0C000E0800
  267. 0E080007100007100007900003A00003A00001C00001C00001C00000800011107F8F14>I<FF3F
  268. 9F803C0E0700380E06001C1604001C1704001E170C000E2308000E2388000F2398000741900007
  269. 41D00003C1E0000380E0000380E0000180C0000100400019107F8F1C>I<FF3F803C1C001C1800
  270. 0E100007200007600003C00001C00001E00003E000027000043800083800181C00381E00FC3FC0
  271. 12107F8F14>I<FF1F803C06001C04001C04001E0C000E08000E080007100007100007900003A0
  272. 0003A00001C00001C00001C000008000008000010000010000E10000E20000E400007800001117
  273. 7F8F14>I E /Fg 1 4 df<0C000C008C40EDC07F800C007F80EDC08C400C000C000A0B7D8B10>
  274. 3 D E /Fh 36 122 df<1C3C3C3C3C040408081020204080060E7D840E>44
  275. D<7FF0FFE07FE00C037D8A10>I<70F8F8F0E005057B840E>I<000200020006000E003C00DC031C
  276. 001C0038003800380038007000700070007000E000E000E000E001C001C001C001C0038080
  277. 8030070FF8FE'BD7 4 @<0 0 0 0 0E0000000E0000100001B001C0 0 300
  278. 0 0"800 0 00 010 0 0 00000000000 0 000 1 00 10 003 0 0 300 060000C'00
  279. 0087 001070 307 060E 04 E0 80E 0!F E00$0C00F00C00C008008003003007007006012791>2D0C60FC0FD8 0F000 00 
  280. 0 002 0 02000 20002000400 48 0 5C 066 00C7087007000 700
  281. 0$8 00&800D0700F0B0F 00E1E00810 83(008 30406 061C 010 012
  282. FB(D7I0 0C001@2032 0 6E00C E08E0 8C 0700 0D000@0 01D000 
  283.  E 8 0D4 03E60E703C07 0 C07(0$8 7808 70&807(00F000F0F0F00F0E0F01@07 1C061C007303701C00@80 1179D1><0F000100 0B0 1 0
  284. 6000060006 000600060A0C0F0 8 08 8 0C00E$00F000F000F@000 7
  285. 008F0200F000706070B00300 3 0@03 0006 0060A0C0A080 0000040
  286. 001801017916>6 D 0FFFA0010 1C01D000@01D0 00100000300003@00
  287. 40C00 4 0 C0040"8 8 8088 0068800058800@0000DF00 0@00 00@030 0E 20000E20 00E0200001E0001003C0002003C0002003C0 40 C 0 4 080 800
  288. 0010701070700F00F00BFBF@E0!F!F#D)EF(6 D<1FF@C00E00801E0018
  289. 001E0008001E0008003C0008003C000300003A0 0807001 070(00708007 0
  290.  0 0@0 000@00 00@F000D0000100001E0200001E0200001E0200003C00000300 00C00000C000800080 0068000 080 00D8000FFF(001A1@7D9E1@
  291. I80FDF 0 1@001E0001000 1E003C0003000 3@003000 70 0 70007 0 0 
  292. 0800F000B0 00@0 000010010 01@001D00300 3000 3003@0078 0 008002800 08000F800FDF0011B7D91>63D0F@0 7E001B0 0F001@00
  293. 00007(0 400!70040 0 708000230 8003B008 00030 8000010000 1E010 041F01000 4F 1008 F 20008 72000 8782000008078200001003C40000100
  294. 3C00001002C0010!E$0020E000201E00 200F00 0020F000040F 0 040010000000000C00 00 1A00 00FD800 002 17D92> 8D<00F@F8 010E0 1E070 1E030010 3A003@003C0 3C03C03@03030 307(
  295. 008008 048 02800@000 80E00030 00 F00FFC00 0F000100 0 100001
  296. E 000E0 00#C00 0C000 0C0 00C000 08 000080 0 0800 004800 0
  297. 0F0 00F000E1FD    EF 8 @<0007@0001C80002050 00 300B0 301A0 1
  298. 8 080000800080000 8000380 000C000C0000F0000F80001F
  299. 000F@000F0000180 008000 80008 00 0800080"00800
  300. 03060700 6 006000600E0700C0E080C0008F0 0 1@2791>3D0FFF108E108210822082200260B0204002400281
  301. 0040001E0000001E0000001E0000003C0000003C0000003C0000003C0000007800000078000000
  302. 7800000078000000F0000000F0000000F0000000F0000001E0000001E0000001E0000001E00000
  303. 03E00000FFFF00001C1F789E21>I<FFF003FC1F8000E00F0000C00F8000800780010007800200
  304. 07C0040003C00C0003C0080003E0100003E0200001E0400001F0400001F0800000F1000000FA00
  305. 0000FE0000007C000000780000007800000070000000F0000000F0000000F0000000E0000001E0
  306. 000001E0000001E0000001E0000003C000003FFC00001E1F779E22>89 D<00F1800389C0070780
  307. 0E03801C03803C0380380700780700780700780700F00E00F00E00F00E00F00E20F01C40F01C40
  308. 703C40705C40308C800F070013147C9317>97 D<07803F8007000700070007000E000E000E000E
  309. 001C001C001CF01D0C3A0E3C0E380F380F700F700F700F700FE01EE01EE01EE01CE03CE0386070
  310. 60E031C01F0010207B9F15>I<0070 0!C0030800081A048010500300 700070
  311. 08000F000D0 000000B0 000F00000100 2004018807@001 47C35
  312. >A<0 080 3D8000060000000 000000E0000@0000E0000A0 0100001000FC08C00080E081C083080300 70000707007000F0E0 F0D0F00D0F
  313. 0E00D00C400C0040#C$004C008C000F07050CF7I8070C000D001B030
  314. 380280C2BD0$C0F00F0000@00000100228408870004C305I00700
  315.  1 C03C030C0078 07000700E00 0E0000E000E00E0001BFA00 C0000100001@00 1@00300038000030038003007000700000700000700000700000
  316. 700000D00000@000A00000A00000A00100100100010007B0000F30000600C0012089F0>H<0C0002011E03007000F00 E10E1A0 E010E1030380303803C03803C03803C07003C07001C0F001C17000C2E0003CE00000E00000E00001C00
  317. 001C00301C00783800F0700060E0003F8000141D7E9315>I<01E0000FE00001C00001C00001C0
  318. 0001C000038000038000038000038000070000070000071E000763000E81800F01C00E01C00E01
  319. C01C03801C03801C03801C0380380700380700380700380E10700E20700C20701C20700C40E00C
  320. C060070014207D9F17>I<00C001E001E001C000000000000000000000000000000E0033002300
  321. 43804300470087000E000E000E001C001C001C003840388030807080310033001C000B1F7C9E0E
  322. >I<01E0000FE00001C00001C00001C00001C00003800003800003800003800007000007000007
  323. 03C00704200E08E00E11E00E21E00E40C01C80001D00001E00001FC00038E00038700038700038
  324. 3840707080707080707080703100E03100601E0013207D9F15>107 D<03C01FC0038003800380
  325. 038007000700070007000E000E000E000E001C001C001C001C0038003800380038007000700070
  326. 007100E200E200E200E200640038000A207C9F0C>I<1C0F80F0002630C318004740640C004780
  327. 680E004700700E004700700E008E00E01C000E00E01C000E00E01C000E00E01C001C01C038001C
  328. 01C038001C01C038001C01C0708038038071003803806100380380E10038038062007007006600
  329. 300300380021147C9325>I<1C0F802630C04740604780604700704700708E00E00E00E00E00E0
  330. 0E00E01C01C01C01C01C01C01C03843803883803083807083803107003303001C016147C931A>
  331. I<007C0001C3000301800E01C01E01C01C01E03C01E07801E07801E07801E0F003C0F003C0F003
  332. C0F00780F00700700F00700E0030180018700007C00013147C9317>I<1C1E0026610047838047
  333. 87804707804703008E00000E00000E00000E00001C00001C00001C00001C000038000038000038
  334. 000038000070000030000011147C9313>114 D<00FC030206010C030C070C060C000F800FF007
  335. F803FC003E000E700EF00CF00CE008401020601F8010147D9313>I<018001C003800380038003
  336. 8007000700FFF007000E000E000E000E001C001C001C001C003800380038003820704070407080
  337. 708031001E000C1C7C9B0F>I<0E00C03300E02301C04381C04301C04701C08703800E03800E03
  338. 800E03801C07001C07001C07001C07101C0E20180E20180E201C1E200C264007C38014147C9318
  339. >I<0E00C1C03300E3C02301C3E04381C1E04301C0E04701C060870380400E0380400E0380400E
  340. 0380401C0700801C0700801C0700801C0701001C0701001C0602001C0F02000C0F04000E130800
  341. 03E1F0001B147C931E>119 D<0E00C03300E02301C04381C04301C04701C08703800E03800E03
  342. 800E03801C07001C07001C07001C07001C0E00180E00180E001C1E000C3C0007DC00001C00001C
  343. 00003800F03800F07000E06000C0C0004380003E0000131D7C9316>121
  344. D E /Fi 81 124 df<001F83E000F06E3001C078780380F8780300F03007007000070070000700
  345. 700007007000070070000700700007007000FFFFFF800700700007007000070070000700700007
  346. 007000070070000700700007007000070070000700700007007000070070000700700007007000
  347. 070070000700700007007000070070007FE3FF001D20809F1B>11 D<003F0000E0C001C0C00381
  348. E00701E00701E0070000070000070000070000070000070000FFFFE00700E00700E00700E00700
  349. E00700E00700E00700E00700E00700E00700E00700E00700E00700E00700E00700E00700E00700
  350. E00700E07FC3FE1720809F19>I<003FE000E0E001C1E00381E00700E00700E00700E00700E007
  351. 00E00700E00700E00700E0FFFFE00700E00700E00700E00700E00700E00700E00700E00700E007
  352. 00E00700E00700E00700E00700E00700E00700E00700E00700E00700E07FE7FE1720809F19>I<
  353. 001F81F80000F04F040001C07C06000380F80F000300F00F000700F00F00070070000007007000
  354. 000700700000070070000007007000000700700000FFFFFFFF0007007007000700700700070070
  355. 070007007007000700700700070070070007007007000700700700070070070007007007000700
  356. 70070007007007000700700700070070070007007007000700700700070070070007007007007F
  357. E3FE3FF02420809F26>I<001F81FF0000F06F070001C07C0F000380F80F000300F00700070070
  358. 0700070070070007007007000700700700070070070007007007000700700700FFFFFFFF000700
  359. 700700070070070007007007000700700700070070070007007007000700700700070070070007
  360. 007007000700700700070070070007007007000700700700070070070007007007000700700700
  361. 070070070007007007007FE3FE3FF02420809F26>I<7038F87CFC7EFC7E743A04020402040208
  362. 04080410081008201040200F0E7E9F17>34 D<0078000000840000018400000302000007020000
  363. 070200000702000007020000070400000704000007080000070800000310000003A00FFC03C003
  364. E0038001C001C0008001C0010003E0010004E0020008F00200187004003078080070380800701C
  365. 1000F01E1000F00E2000F0074000F003C0087003C0087801C010380670301C18386007E00F801E
  366. 227EA023>38 D<70F8FCFC74040404080810102040060E7C9F0D>I<0020004000800100020006
  367. 000C000C00180018003000300030007000600060006000E000E000E000E000E000E000E000E000
  368. E000E000E000E0006000600060007000300030003000180018000C000C00060002000100008000
  369. 4000200B2E7DA112>I<800040002000100008000C00060006000300030001800180018001C000
  370. C000C000C000E000E000E000E000E000E000E000E000E000E000E000E000C000C000C001C00180
  371. 0180018003000300060006000C00080010002000400080000B2E7DA112>I<70F8FCFC74040404
  372. 080810102040060E7C840D>44 D<FFC0FFC00A027F8A0F>I<70F8F8F87005057C840D>I<000100
  373. 030003000600060006000C000C000C00180018001800300030003000600060006000C000C000C0
  374. 0180018001800300030003000600060006000C000C000C00180018001800300030003000600060
  375. 006000C000C000C000102D7DA117>I<03F0000E1C001C0E001806003807007003807003807003
  376. 80700380F003C0F003C0F003C0F003C0F003C0F003C0F003C0F003C0F003C0F003C0F003C0F003
  377. C0F003C07003807003807003807807803807001806001C0E000E1C0003F000121F7E9D17>I<01
  378. 8003800F80F3800380038003800380038003800380038003800380038003800380038003800380
  379. 0380038003800380038003800380038007C0FFFE0F1E7C9D17>I<03F0000C1C00100E00200700
  380. 400780800780F007C0F803C0F803C0F803C02007C00007C0000780000780000F00000E00001C00
  381. 00380000700000600000C0000180000300000600400C00401800401000803FFF807FFF80FFFF80
  382. 121E7E9D17>I<03F0000C1C00100E00200F00780F80780780780780380F80000F80000F00000F
  383. 00000E00001C0000380003F000003C00000E00000F000007800007800007C02007C0F807C0F807
  384. C0F807C0F00780400780400F00200E001C3C0003F000121F7E9D17>I<000600000600000E0000
  385. 0E00001E00002E00002E00004E00008E00008E00010E00020E00020E00040E00080E00080E0010
  386. 0E00200E00200E00400E00C00E00FFFFF0000E00000E00000E00000E00000E00000E00000E0000
  387. FFE0141E7F9D17>I<1803001FFE001FFC001FF8001FE000100000100000100000100000100000
  388. 10000011F000161C00180E001007001007800003800003800003C00003C00003C07003C0F003C0
  389. F003C0E00380400380400700200600100E000C380003E000121F7E9D17>I<007C000182000701
  390. 000E03800C07801C0780380300380000780000700000700000F1F000F21C00F40600F80700F803
  391. 80F80380F003C0F003C0F003C0F003C0F003C07003C07003C07003803803803807001807000C0E
  392. 00061C0001F000121F7E9D17>I<4000007FFFC07FFF807FFF8040010080020080020080040000
  393. 080000080000100000200000200000400000400000C00000C00001C00001800003800003800003
  394. 8000038000078000078000078000078000078000078000078000030000121F7D9D17>I<03F000
  395. 0C0C001006003003002001806001806001806001807001807803003E03003F06001FC8000FF000
  396. 03F80007FC000C7E00103F00300F806003804001C0C001C0C000C0C000C0C000C0C00080600180
  397. 2001001002000C0C0003F000121F7E9D17>I<03F0000E18001C0C003806003807007007007003
  398. 80F00380F00380F003C0F003C0F003C0F003C0F003C07007C07007C03807C0180BC00E13C003E3
  399. C0000380000380000380000700300700780600780E00700C002018001070000FC000121F7E9D17
  400. >I<70F8F8F8700000000000000000000070F8F8F87005147C930D>I<70F8F8F870000000000000
  401. 0000000070F0F8F878080808101010202040051D7C930D>I<7FFFFFE0FFFFFFF0000000000000
  402. 0000000000000000000000000000000000000000000000000000FFFFFFF07FFFFFE01C0C7D9023
  403. >61 D<000100000003800000038000000380000007C0000007C0000007C0000009E0000009E000
  404. 0009E0000010F0000010F0000010F00000207800002078000020780000403C0000403C0000403C
  405. 0000801E0000801E0000FFFE0001000F0001000F0001000F000200078002000780020007800400
  406. 03C00E0003C01F0007E0FFC03FFE1F207F9F22>65 D<FFFFE0000F80380007801E0007801F0007
  407. 800F0007800F8007800F8007800F8007800F8007800F8007800F0007801F0007801E0007803C00
  408. 07FFF00007803C0007801E0007800F0007800F8007800780078007C0078007C0078007C0078007
  409. C0078007C00780078007800F8007800F0007801F000F803C00FFFFF0001A1F7E9E20>I<000FC0
  410. 40007030C001C009C0038005C0070003C00E0001C01E0000C01C0000C03C0000C07C0000407C00
  411. 004078000040F8000000F8000000F8000000F8000000F8000000F8000000F8000000F8000000F8
  412. 000000780000007C0000407C0000403C0000401C0000401E0000800E0000800700010003800200
  413. 01C0040000703800000FC0001A217D9F21>I<FFFFE0000F803C0007801E000780070007800380
  414. 078003C0078001E0078001E0078001F0078000F0078000F0078000F8078000F8078000F8078000
  415. F8078000F8078000F8078000F8078000F8078000F8078000F0078000F0078000F0078001E00780
  416. 01E0078003C0078003800780070007800E000F803C00FFFFE0001D1F7E9E23>I<FFFFFF000F80
  417. 0F0007800300078003000780010007800180078000800780008007800080078080800780800007
  418. 808000078080000781800007FF8000078180000780800007808000078080000780800007800020
  419. 0780002007800020078000400780004007800040078000C0078000C0078001800F800F80FFFFFF
  420. 801B1F7E9E1F>I<FFFFFF000F800F000780030007800300078001000780018007800080078000
  421. 800780008007800080078080000780800007808000078080000781800007FF8000078180000780
  422. 800007808000078080000780800007800000078000000780000007800000078000000780000007
  423. 800000078000000FC00000FFFE0000191F7E9E1E>I<000FE0200078186000E004E0038002E007
  424. 0001E00F0000E01E0000601E0000603C0000603C0000207C00002078000020F8000000F8000000
  425. F8000000F8000000F8000000F8000000F8000000F8007FFCF80003E0780001E07C0001E03C0001
  426. E03C0001E01E0001E01E0001E00F0001E0070001E0038002E000E0046000781820000FE0001E21
  427. 7D9F24>I<FFF8FFF80F800F8007800F0007800F0007800F0007800F0007800F0007800F000780
  428. 0F0007800F0007800F0007800F0007800F0007800F0007FFFF0007800F0007800F0007800F0007
  429. 800F0007800F0007800F0007800F0007800F0007800F0007800F0007800F0007800F0007800F00
  430. 07800F000F800F80FFF8FFF81D1F7E9E22>I<FFFC0FC007800780078007800780078007800780
  431. 07800780078007800780078007800780078007800780078007800780078007800780078007800F
  432. C0FFFC0E1F7F9E10>I<0FFFC0007C00003C00003C00003C00003C00003C00003C00003C00003C
  433. 00003C00003C00003C00003C00003C00003C00003C00003C00003C00003C00003C00003C00003C
  434. 00203C00F83C00F83C00F83C00F0380040780040700030E0000F800012207E9E17>I<FFFC0FFC
  435. 0FC003E00780018007800100078002000780040007800800078010000780200007804000078080
  436. 00078100000783000007878000078F80000793C0000791E00007A1E00007C0F0000780F0000780
  437. 780007803C0007803C0007801E0007801E0007800F000780078007800780078007C00FC007E0FF
  438. FC3FFC1E1F7E9E23>I<FFFE000FC0000780000780000780000780000780000780000780000780
  439. 000780000780000780000780000780000780000780000780000780000780000780020780020780
  440. 0207800207800607800407800407800C07801C0F807CFFFFFC171F7E9E1C>I<FF80001FF80F80
  441. 001F800780001F0005C0002F0005C0002F0005C0002F0004E0004F0004E0004F000470008F0004
  442. 70008F000470008F000438010F000438010F000438010F00041C020F00041C020F00041C020F00
  443. 040E040F00040E040F00040E040F000407080F000407080F000407080F000403900F000403900F
  444. 000401E00F000401E00F000401E00F000E00C00F001F00C01F80FFE0C1FFF8251F7E9E2A>I<FF
  445. 803FF807C007C007C0038005E0010005E0010004F001000478010004780100043C0100043C0100
  446. 041E0100040F0100040F010004078100040781000403C1000401E1000401E1000400F1000400F1
  447. 000400790004003D0004003D0004001F0004001F0004000F0004000700040007000E0003001F00
  448. 0300FFE001001D1F7E9E22>I<001F800000F0F00001C0380007801E000F000F000E0007001E00
  449. 07803C0003C03C0003C07C0003E0780001E0780001E0F80001F0F80001F0F80001F0F80001F0F8
  450. 0001F0F80001F0F80001F0F80001F0F80001F0780001E07C0003E07C0003E03C0003C03C0003C0
  451. 1E0007800E0007000F000F0007801E0001C0380000F0F000001F80001C217D9F23>I<FFFFE000
  452. 0F80780007801C0007801E0007800F0007800F8007800F8007800F8007800F8007800F8007800F
  453. 8007800F0007801E0007801C000780780007FFE000078000000780000007800000078000000780
  454. 000007800000078000000780000007800000078000000780000007800000078000000FC00000FF
  455. FC0000191F7E9E1F>I<FFFF80000F80F0000780780007803C0007801E0007801E0007801F0007
  456. 801F0007801F0007801F0007801E0007801E0007803C00078078000780F00007FF80000781C000
  457. 0780E0000780F0000780700007807800078078000780780007807C0007807C0007807C0007807C
  458. 0407807E0407803E040FC01E08FFFC0F10000003E01E207E9E21>82 D<07E0800C198010078030
  459. 0380600180600180E00180E00080E00080E00080F00000F000007800007F00003FF0001FFC000F
  460. FE0003FF00001F800007800003C00003C00001C08001C08001C08001C08001C0C00180C00380E0
  461. 0300F00600CE0C0081F80012217D9F19>I<7FFFFFE0780F01E0600F0060400F0020400F0020C0
  462. 0F0030800F0010800F0010800F0010800F0010000F0000000F0000000F0000000F0000000F0000
  463. 000F0000000F0000000F0000000F0000000F0000000F0000000F0000000F0000000F0000000F00
  464. 00000F0000000F0000000F0000000F0000001F800007FFFE001C1F7E9E21>I<FFFC3FF80FC007
  465. C00780038007800100078001000780010007800100078001000780010007800100078001000780
  466. 010007800100078001000780010007800100078001000780010007800100078001000780010007
  467. 8001000780010007800100038002000380020001C0020001C0040000E008000070180000382000
  468. 000FC0001D207E9E22>I<FFF003FE1F8000F80F0000600F800060078000400780004003C00080
  469. 03C0008003C0008001E0010001E0010001F0010000F0020000F0020000F8060000780400007804
  470. 00003C0800003C0800003C0800001E1000001E1000001F3000000F2000000F20000007C0000007
  471. C0000007C000000380000003800000038000000100001F207F9E22>I<FFF07FF81FF01F800FC0
  472. 07C00F00078003800F00078001000F0007C00100078007C00200078007C00200078007C0020003
  473. C009E0040003C009E0040003C009E0040003E010F00C0001E010F0080001E010F0080001F02078
  474. 080000F02078100000F02078100000F0403C10000078403C20000078403C20000078C03E200000
  475. 3C801E4000003C801E4000003C801E4000001F000F8000001F000F8000001F000F8000001E0007
  476. 8000000E00070000000E00070000000C000300000004000200002C207F9E2F>I<7FF83FF80FE0
  477. 0FC007C0070003C0020001E0040001F00C0000F0080000781000007C1000003C2000003E400000
  478. 1E4000000F8000000F8000000780000003C0000007E0000005E0000009F0000018F80000107800
  479. 00207C0000603C0000401E0000801F0001800F0001000780020007C0070003C01F8007E0FFE01F
  480. FE1F1F7F9E22>I<FFF003FF1F8000F80F8000600780004007C0004003E0008001E0008001F001
  481. 0000F0030000F80200007C0400003C0400003E0800001E0800001F1000000FB0000007A0000007
  482. C0000003C0000003C0000003C0000003C0000003C0000003C0000003C0000003C0000003C00000
  483. 03C0000003C0000007C000007FFE00201F7F9E22>I<FEFEC0C0C0C0C0C0C0C0C0C0C0C0C0C0C0
  484. C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0C0FEFE072D7CA10D>91
  485. D<080410082010201040204020804080408040B85CFC7EFC7E7C3E381C0F0E7B9F17>I<FEFE06
  486. 060606060606060606060606060606060606060606060606060606060606060606060606060606
  487. 06FEFE072D7FA10D>I<1FE000303000781800781C00300E00000E00000E00000E0000FE00078E
  488. 001E0E00380E00780E00F00E10F00E10F00E10F01E10781E103867200F83C014147E9317>97
  489. D<0E0000FE00000E00000E00000E00000E00000E00000E00000E00000E00000E00000E00000E3E
  490. 000EC3800F01C00F00E00E00E00E00700E00700E00780E00780E00780E00780E00780E00780E00
  491. 700E00700E00E00F00E00D01C00CC300083E0015207F9F19>I<03F80E0C1C1E381E380C700070
  492. 00F000F000F000F000F000F00070007000380138011C020E0C03F010147E9314>I<000380003F
  493. 8000038000038000038000038000038000038000038000038000038000038003E380061B801C07
  494. 80380380380380700380700380F00380F00380F00380F00380F00380F003807003807003803803
  495. 803807801C07800E1B8003E3F815207E9F19>I<03F0000E1C001C0E0038070038070070070070
  496. 0380F00380F00380FFFF80F00000F00000F000007000007000003800801800800C010007060001
  497. F80011147F9314>I<007C00C6018F038F07060700070007000700070007000700FFF007000700
  498. 07000700070007000700070007000700070007000700070007000700070007007FF01020809F0E
  499. >I<0000E003E3300E3C301C1C30380E00780F00780F00780F00780F00780F00380E001C1C001E
  500. 380033E0002000002000003000003000003FFE001FFF800FFFC03001E0600070C00030C00030C0
  501. 0030C000306000603000C01C038003FC00141F7F9417>I<0E0000FE00000E00000E00000E0000
  502. 0E00000E00000E00000E00000E00000E00000E00000E3E000E43000E81800F01C00F01C00E01C0
  503. 0E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C0
  504. FFE7FC16207F9F19>I<1C003E003E003E001C000000000000000000000000000E007E000E000E
  505. 000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E00FFC00A1F809E0C>
  506. I<00E001F001F001F000E0000000000000000000000000007007F000F000700070007000700070
  507. 00700070007000700070007000700070007000700070007000700070007000706070F060F0C061
  508. 803F000C28829E0E>I<0E0000FE00000E00000E00000E00000E00000E00000E00000E00000E00
  509. 000E00000E00000E0FF00E03C00E03000E02000E04000E08000E10000E30000E70000EF8000F38
  510. 000E1C000E1E000E0E000E07000E07800E03800E03C00E03E0FFCFF815207F9F18>I<0E00FE00
  511. 0E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E
  512. 000E000E000E000E000E000E000E000E000E00FFE00B20809F0C>I<0E1F01F000FE618618000E
  513. 81C81C000F00F00E000F00F00E000E00E00E000E00E00E000E00E00E000E00E00E000E00E00E00
  514. 0E00E00E000E00E00E000E00E00E000E00E00E000E00E00E000E00E00E000E00E00E000E00E00E
  515. 000E00E00E00FFE7FE7FE023147F9326>I<0E3E00FE43000E81800F01C00F01C00E01C00E01C0
  516. 0E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C0FFE7FC
  517. 16147F9319>I<01F800070E001C03803801C03801C07000E07000E0F000F0F000F0F000F0F000
  518. F0F000F0F000F07000E07000E03801C03801C01C0380070E0001F80014147F9317>I<0E3E00FE
  519. C3800F01C00F00E00E00E00E00F00E00700E00780E00780E00780E00780E00780E00780E00700E
  520. 00F00E00E00F01E00F01C00EC3000E3E000E00000E00000E00000E00000E00000E00000E00000E
  521. 0000FFE000151D7F9319>I<03E0800619801C05803C0780380380780380700380F00380F00380
  522. F00380F00380F00380F003807003807803803803803807801C0B800E138003E380000380000380
  523. 000380000380000380000380000380000380003FF8151D7E9318>I<0E78FE8C0F1E0F1E0F0C0E
  524. 000E000E000E000E000E000E000E000E000E000E000E000E000E00FFE00F147F9312>I<1F9030
  525. 704030C010C010C010E00078007F803FE00FF00070803880188018C018C018E030D0608F800D14
  526. 7E9312>I<020002000200060006000E000E003E00FFF80E000E000E000E000E000E000E000E00
  527. 0E000E000E000E080E080E080E080E080610031001E00D1C7F9B12>I<0E01C0FE1FC00E01C00E
  528. 01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E
  529. 03C00603C0030DC001F1FC16147F9319>I<FF83F81E01E01C00C00E00800E00800E0080070100
  530. 07010003820003820003820001C40001C40001EC0000E80000E800007000007000007000002000
  531. 15147F9318>I<FF9FE1FC3C0780701C0300601C0380200E0380400E0380400E03C0400707C080
  532. 0704C0800704E080038861000388710003C8730001D0320001D03A0000F03C0000E01C0000E01C
  533. 0000601800004008001E147F9321>I<7FC3FC0F01E00701C007018003810001C20000E40000EC
  534. 00007800003800003C00007C00004E000087000107000303800201C00601E01E01E0FF07FE1714
  535. 809318>I<FF83F81E01E01C00C00E00800E00800E008007010007010003820003820003820001
  536. C40001C40001EC0000E80000E800007000007000007000002000002000004000004000004000F0
  537. 8000F08000F100006200003C0000151D7F9318>I<3FFF380E200E201C40384078407000E001E0
  538. 01C00380078007010E011E011C0338027006700EFFFE10147F9314>I<FFFFFC1601808C17>I
  539. E /Fj 33 120 df<FFFF80FFFF80FFFF80FFFF80FFFF80FFFF8011067F9017>45
  540. D<000E00001E00007E0007FE00FFFE00FFFE00F8FE0000FE0000FE0000FE0000FE0000FE0000FE
  541. 0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE
  542. 0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE007FFFFE7FFFFE7FFF
  543. FE17277BA622>49 D<00FF800003FFF0000FFFFC001F03FE003800FF007C007F80FE003FC0FF00
  544. 3FC0FF003FE0FF001FE0FF001FE07E001FE03C003FE000003FE000003FC000003FC000007F8000
  545. 007F000000FE000000FC000001F8000003F0000003E00000078000000F0000001E0000003C00E0
  546. 007000E000E000E001C001C0038001C0070001C00FFFFFC01FFFFFC03FFFFFC07FFFFFC0FFFFFF
  547. 80FFFFFF80FFFFFF801B277DA622>I<007F800003FFF00007FFFC000F81FE001F00FF003F80FF
  548. 003F807F803F807F803F807F801F807F800F007F800000FF000000FF000000FE000001FC000001
  549. F8000007F00000FFC00000FFF0000001FC0000007E0000007F0000007F8000003FC000003FC000
  550. 003FE000003FE03C003FE07E003FE0FF003FE0FF003FE0FF003FC0FF007FC07E007F807C007F00
  551. 3F01FE001FFFFC0007FFF00000FF80001B277DA622>I<00000E0000001E0000003E0000007E00
  552. 0000FE000000FE000001FE000003FE0000077E00000E7E00000E7E00001C7E0000387E0000707E
  553. 0000E07E0000E07E0001C07E0003807E0007007E000E007E000E007E001C007E0038007E007000
  554. 7E00E0007E00FFFFFFF8FFFFFFF8FFFFFFF80000FE000000FE000000FE000000FE000000FE0000
  555. 00FE000000FE000000FE00007FFFF8007FFFF8007FFFF81D277EA622>I<0C0003000F803F000F
  556. FFFE000FFFFC000FFFF8000FFFF0000FFFE0000FFFC0000FFE00000E0000000E0000000E000000
  557. 0E0000000E0000000E0000000E7FC0000FFFF8000F80FC000E003E000C003F0000001F8000001F
  558. C000001FC000001FE000001FE018001FE07C001FE0FE001FE0FE001FE0FE001FE0FE001FC0FC00
  559. 1FC078003F8078003F803C007F001F01FE000FFFF80003FFF00000FF80001B277DA622>I<0007
  560. F000003FFC0000FFFE0001FC0F0003F01F8007E03F800FC03F801FC03F801F803F803F801F003F
  561. 8000007F0000007F0000007F000000FF000000FF0FC000FF3FF800FF707C00FFC03E00FFC03F00
  562. FF801F80FF801FC0FF001FC0FF001FE0FF001FE0FF001FE07F001FE07F001FE07F001FE07F001F
  563. E03F001FE03F001FC01F801FC01F803F800FC03F0007E07E0003FFFC0000FFF000003FC0001B27
  564. 7DA622>I<000003800000000007C00000000007C0000000000FE0000000000FE0000000000FE0
  565. 000000001FF0000000001FF0000000003FF8000000003FF8000000003FF80000000073FC000000
  566. 0073FC00000000F3FE00000000E1FE00000000E1FE00000001C0FF00000001C0FF00000003C0FF
  567. 80000003807F80000007807FC0000007003FC0000007003FC000000E003FE000000E001FE00000
  568. 1E001FF000001C000FF000001FFFFFF000003FFFFFF800003FFFFFF80000780007FC0000700003
  569. FC0000700003FC0000E00001FE0000E00001FE0001E00001FF0001C00000FF0001C00000FF00FF
  570. FE001FFFFEFFFE001FFFFEFFFE001FFFFE2F297EA834>65 D<FFFFFFF80000FFFFFFFF8000FFFF
  571. FFFFC00003F8001FF00003F8000FF80003F80007FC0003F80003FC0003F80003FC0003F80003FE
  572. 0003F80001FE0003F80001FE0003F80001FE0003F80003FE0003F80003FC0003F80003FC0003F8
  573. 0007F80003F8000FF00003F8001FE00003F800FFC00003FFFFFE000003FFFFFFE00003F80007F0
  574. 0003F80003FC0003F80001FE0003F80001FE0003F80000FF0003F80000FF0003F80000FF8003F8
  575. 0000FF8003F80000FF8003F80000FF8003F80000FF8003F80000FF8003F80000FF0003F80001FF
  576. 0003F80003FE0003F80007FC0003F8001FF800FFFFFFFFF000FFFFFFFFC000FFFFFFFE00002929
  577. 7DA831>I<00003FF001800003FFFE0380000FFFFF8780003FF007DF8000FF8001FF8001FE0000
  578. 7F8003FC00003F8007F000001F800FF000000F801FE0000007801FE0000007803FC0000007803F
  579. C0000003807FC0000003807F80000003807F8000000000FF8000000000FF8000000000FF800000
  580. 0000FF8000000000FF8000000000FF8000000000FF8000000000FF8000000000FF80000000007F
  581. 80000000007F80000000007FC0000003803FC0000003803FC0000003801FE0000003801FE00000
  582. 07000FF00000070007F000000E0003FC00001E0001FE00003C0000FF8000F800003FF007E00000
  583. 0FFFFFC0000003FFFF000000003FF8000029297CA832>I<FFFFFFF80000FFFFFFFF8000FFFFFF
  584. FFE00003FC001FF80003FC0007FC0003FC0001FE0003FC0000FF0003FC00007F8003FC00003FC0
  585. 03FC00001FC003FC00001FE003FC00001FE003FC00000FF003FC00000FF003FC00000FF003FC00
  586. 000FF003FC00000FF803FC00000FF803FC00000FF803FC00000FF803FC00000FF803FC00000FF8
  587. 03FC00000FF803FC00000FF803FC00000FF803FC00000FF803FC00000FF003FC00000FF003FC00
  588. 000FF003FC00001FE003FC00001FE003FC00001FC003FC00003FC003FC00007F8003FC00007F00
  589. 03FC0001FE0003FC0003FC0003FC001FF800FFFFFFFFE000FFFFFFFF8000FFFFFFFC00002D297D
  590. A835>I<FFFFFCFFFFFCFFFFFC01FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE
  591. 0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE
  592. 0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE0001FE
  593. 00FFFFFCFFFFFCFFFFFC16297EA81A>73 D<FFFC0000FFFEFFFE0000FFFEFFFF0000FFFE03FF80
  594. 00038003FF8000038003BFC0000380039FE0000380039FF0000380038FF80003800387F8000380
  595. 0383FC0003800381FE0003800381FF0003800380FF80038003807FC0038003803FC0038003801F
  596. E0038003800FF0038003800FF80380038007FC0380038003FC0380038001FE0380038000FF0380
  597. 038000FF83800380007FC3800380003FE3800380001FE3800380000FF38003800007FB80038000
  598. 07FF8003800003FF8003800001FF8003800000FF80038000007F80038000007F80038000003F80
  599. 038000001F80038000000F80FFFE00000780FFFE00000380FFFE000003802F297DA836>78
  600. D<FFFFFFE00000FFFFFFFE0000FFFFFFFF800003FC007FE00003FC000FF00003FC0007F80003FC
  601. 0007FC0003FC0003FC0003FC0003FE0003FC0003FE0003FC0003FE0003FC0003FE0003FC0003FE
  602. 0003FC0003FE0003FC0003FC0003FC0007F80003FC0007F80003FC001FE00003FC007FC00003FF
  603. FFFE000003FFFFF0000003FC00FC000003FC007F000003FC003F800003FC003F800003FC001FC0
  604. 0003FC001FE00003FC001FE00003FC001FE00003FC001FE00003FC001FE00003FC001FF00003FC
  605. 001FF00003FC001FF00003FC001FF00703FC001FF80703FC000FF80703FC0007F80EFFFFF003FE
  606. 1CFFFFF001FFF8FFFFF0003FF030297DA834>82 D<01FF800007FFF0000F81F8001FC07E001FC0
  607. 7E001FC03F000F803F8007003F8000003F8000003F8000003F80000FFF8000FFFF8007FC3F800F
  608. E03F803F803F803F003F807F003F80FE003F80FE003F80FE003F80FE003F807E007F807F00DF80
  609. 3F839FFC0FFF0FFC01FC03FC1E1B7E9A21>97 D<FFE0000000FFE0000000FFE00000000FE00000
  610. 000FE00000000FE00000000FE00000000FE00000000FE00000000FE00000000FE00000000FE000
  611. 00000FE00000000FE00000000FE00000000FE1FE00000FE7FF80000FFE07E0000FF801F0000FF0
  612. 00F8000FE000FC000FE000FE000FE0007F000FE0007F000FE0007F000FE0007F800FE0007F800F
  613. E0007F800FE0007F800FE0007F800FE0007F800FE0007F800FE0007F000FE0007F000FE0007F00
  614. 0FE000FE000FE000FC000FF001F8000FF803F0000F9E07E0000F07FF80000E01FC0000212A7EA9
  615. 26>I<001FF80000FFFE0003F01F0007E03F800FC03F801F803F803F801F007F800E007F000000
  616. 7F000000FF000000FF000000FF000000FF000000FF000000FF000000FF0000007F0000007F0000
  617. 007F8000003F8001C01F8001C00FC0038007E0070003F01E0000FFFC00001FE0001A1B7E9A1F>
  618. I<00003FF80000003FF80000003FF800000003F800000003F800000003F800000003F800000003
  619. F800000003F800000003F800000003F800000003F800000003F800000003F800000003F800001F
  620. E3F80000FFFBF80003F03FF80007E00FF8000FC007F8001F8003F8003F8003F8007F0003F8007F
  621. 0003F8007F0003F800FF0003F800FF0003F800FF0003F800FF0003F800FF0003F800FF0003F800
  622. FF0003F8007F0003F8007F0003F8007F0003F8003F8003F8001F8003F8000F8007F80007C00FF8
  623. 0003F03BFF8000FFF3FF80003FC3FF80212A7EA926>I<003FE00001FFF80003F07E0007C01F00
  624. 0F801F801F800F803F800FC07F000FC07F0007C07F0007E0FF0007E0FF0007E0FFFFFFE0FFFFFF
  625. E0FF000000FF000000FF0000007F0000007F0000007F0000003F8000E01F8000E00FC001C007E0
  626. 038003F81F0000FFFE00001FF0001B1B7E9A20>I<0007F0003FFC00FE3E01F87F03F87F03F07F
  627. 07F07F07F03E07F00007F00007F00007F00007F00007F00007F000FFFFC0FFFFC0FFFFC007F000
  628. 07F00007F00007F00007F00007F00007F00007F00007F00007F00007F00007F00007F00007F000
  629. 07F00007F00007F00007F00007F00007F00007F0007FFF807FFF807FFF80182A7EA915>I<00FF
  630. 81F003FFE7F80FC1FE7C1F80FC7C1F007C383F007E107F007F007F007F007F007F007F007F007F
  631. 007F007F007F003F007E001F007C001F80FC000FC1F8001FFFE00018FF80003800000038000000
  632. 3C0000003E0000003FFFF8001FFFFF001FFFFF800FFFFFC007FFFFE01FFFFFF03E0007F07C0001
  633. F8F80000F8F80000F8F80000F8F80000F87C0001F03C0001E01F0007C00FC01F8003FFFE00007F
  634. F0001E287E9A22>I<07000F801FC03FE03FE03FE01FC00F800700000000000000000000000000
  635. 0000FFE0FFE0FFE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00F
  636. E00FE00FE00FE00FE00FE0FFFEFFFEFFFE0F2B7DAA14>105 D<FFE00000FFE00000FFE000000F
  637. E000000FE000000FE000000FE000000FE000000FE000000FE000000FE000000FE000000FE00000
  638. 0FE000000FE000000FE01FFC0FE01FFC0FE01FFC0FE007800FE00F000FE01E000FE03C000FE078
  639. 000FE0E0000FE3C0000FE7C0000FEFE0000FFFE0000FFFF0000FF3F8000FE3F8000FC1FC000FC0
  640. FE000FC07F000FC07F000FC03F800FC01FC00FC00FC00FC00FE0FFFC3FFEFFFC3FFEFFFC3FFE1F
  641. 2A7EA924>107 D<FFE0FFE0FFE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00F
  642. E00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE00FE0
  643. 0FE00FE00FE00FE0FFFEFFFEFFFE0F2A7DA914>I<FFC07F800FF000FFC1FFE03FFC00FFC383F0
  644. 707E000FC603F8C07F000FCC01F9803F000FD801FF003F800FF001FE003F800FF001FE003F800F
  645. E001FC003F800FE001FC003F800FE001FC003F800FE001FC003F800FE001FC003F800FE001FC00
  646. 3F800FE001FC003F800FE001FC003F800FE001FC003F800FE001FC003F800FE001FC003F800FE0
  647. 01FC003F800FE001FC003F800FE001FC003F800FE001FC003F800FE001FC003F80FFFE1FFFC3FF
  648. F8FFFE1FFFC3FFF8FFFE1FFFC3FFF8351B7D9A3A>I<FFC07F0000FFC1FFC000FFC787E0000FCE
  649. 03F0000FD803F0000FD803F8000FF003F8000FF003F8000FE003F8000FE003F8000FE003F8000F
  650. E003F8000FE003F8000FE003F8000FE003F8000FE003F8000FE003F8000FE003F8000FE003F800
  651. 0FE003F8000FE003F8000FE003F8000FE003F8000FE003F800FFFE3FFF80FFFE3FFF80FFFE3FFF
  652. 80211B7D9A26>I<003FE00001FFFC0003F07E000FC01F801F800FC03F800FE03F0007E07F0007
  653. F07F0007F07F0007F0FF0007F8FF0007F8FF0007F8FF0007F8FF0007F8FF0007F8FF0007F8FF00
  654. 07F87F0007F07F0007F03F800FE03F800FE01F800FC00FC01F8007F07F0001FFFC00003FE0001D
  655. 1B7E9A22>I<FFE1FE0000FFE7FF8000FFFE07E0000FF803F0000FF001F8000FE000FC000FE000
  656. FE000FE000FF000FE0007F000FE0007F000FE0007F800FE0007F800FE0007F800FE0007F800FE0
  657. 007F800FE0007F800FE0007F800FE0007F000FE000FF000FE000FF000FE000FE000FE001FC000F
  658. F001F8000FF803F0000FFE0FE0000FE7FF80000FE1FC00000FE00000000FE00000000FE0000000
  659. 0FE00000000FE00000000FE00000000FE00000000FE00000000FE0000000FFFE000000FFFE0000
  660. 00FFFE00000021277E9A26>I<FFC1F0FFC7FCFFCE3E0FD87F0FD87F0FF07F0FF03E0FF01C0FE0
  661. 000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0000FE0
  662. 000FE0000FE000FFFF00FFFF00FFFF00181B7E9A1C>114 D<03FE300FFFF01E03F03800F07000
  663. 70F00070F00070F80070FC0000FFE0007FFE007FFF803FFFE01FFFF007FFF800FFF80003FC0000
  664. FC60007CE0003CF0003CF00038F80038FC0070FF01E0F7FFC0C1FF00161B7E9A1B>I<00700000
  665. 700000700000700000F00000F00000F00001F00003F00003F00007F0001FFFF0FFFFF0FFFFF007
  666. F00007F00007F00007F00007F00007F00007F00007F00007F00007F00007F00007F00007F00007
  667. F03807F03807F03807F03807F03807F03803F03803F87001F86000FFC0001F8015267FA51B>I<
  668. FFE03FF800FFE03FF800FFE03FF8000FE003F8000FE003F8000FE003F8000FE003F8000FE003F8
  669. 000FE003F8000FE003F8000FE003F8000FE003F8000FE003F8000FE003F8000FE003F8000FE003
  670. F8000FE003F8000FE003F8000FE003F8000FE003F8000FE003F8000FE007F80007E007F80007E0
  671. 0FF80003F03BFF8001FFF3FF80003FC3FF80211B7D9A26>I<FFFE7FFC0FFEFFFE7FFC0FFEFFFE
  672. 7FFC0FFE0FE007E000E007F003F001C007F003F001C007F807F803C003F807F8038003F807F803
  673. 8001FC0EFC070001FC0EFC070001FE1EFC0F0000FE1C7E0E0000FE1C7E0E0000FF383F1E00007F
  674. 383F1C00007F783F3C00003FF01FB800003FF01FB800003FF01FF800001FE00FF000001FE00FF0
  675. 00000FC007E000000FC007E000000FC007E00000078003C00000078003C0002F1B7F9A32>119
  676. D E /Fk 45 122 df<007E0001C1800301800703C00E03C00E01800E00000E00000E00000E0000
  677. 0E0000FFFFC00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C00E01C0
  678. 0E01C00E01C00E01C00E01C00E01C07F87F8151D809C17>12 D<6060F0F0F8F868680808080808
  679. 08101010102020404080800D0C7F9C15>34 D<004000800100020006000C000C00180018003000
  680. 30007000600060006000E000E000E000E000E000E000E000E000E000E000E000E0006000600060
  681. 00700030003000180018000C000C00060002000100008000400A2A7D9E10>40
  682. D<800040002000100018000C000C000600060003000300038001800180018001C001C001C001C0
  683. 01C001C001C001C001C001C001C001C0018001800180038003000300060006000C000C00180010
  684. 002000400080000A2A7E9E10>I<60F0F0701010101020204080040C7C830C>44
  685. D<FFE0FFE00B0280890E>I<60F0F06004047C830C>I<000600000006000000060000000F000000
  686. 0F0000000F00000017800000178000001780000023C0000023C0000023C0000041E0000041E000
  687. 0041E0000080F0000080F0000180F8000100780001FFF80003007C0002003C0002003C0006003E
  688. 0004001E0004001E000C001F001E001F00FF80FFF01C1D7F9C1F>65 D<001F808000E061800180
  689. 1980070007800E0003801C0003801C00018038000180780000807800008070000080F0000000F0
  690. 000000F0000000F0000000F0000000F0000000F0000000F0000000700000807800008078000080
  691. 380000801C0001001C0001000E000200070004000180080000E03000001FC000191E7E9C1E>67
  692. D<FFFFFC0F003C0F000C0F00040F00040F00060F00020F00020F02020F02000F02000F02000F06
  693. 000FFE000F06000F02000F02000F02000F02010F00010F00020F00020F00020F00060F00060F00
  694. 0C0F003CFFFFFC181C7E9B1C>69 D<FFFFF80F00780F00180F00080F00080F000C0F00040F0004
  695. 0F02040F02000F02000F02000F06000FFE000F06000F02000F02000F02000F02000F00000F0000
  696. 0F00000F00000F00000F00000F00000F8000FFF800161C7E9B1B>I<001F808000E06180018019
  697. 80070007800E0003801C0003801C00018038000180780000807800008070000080F0000000F000
  698. 0000F0000000F0000000F0000000F0000000F000FFF0F0000F8070000780780007807800078038
  699. 0007801C0007801C0007800E00078007000B800180118000E06080001F80001C1E7E9C21>I<FF
  700. F00F000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F00
  701. 0F000F000F000F000F000F000F00FFF00C1C7F9B0F>73 D<FFF8000F80000F00000F00000F0000
  702. 0F00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F0000
  703. 0F00080F00080F00080F00180F00180F00100F00300F00700F01F0FFFFF0151C7E9B1A>76
  704. D<FF8000FF800F8000F8000F8000F8000BC00178000BC00178000BC001780009E002780009E002
  705. 780008F004780008F004780008F0047800087808780008780878000878087800083C107800083C
  706. 107800083C107800081E207800081E207800081E207800080F407800080F407800080780780008
  707. 07807800080780780008030078001C03007800FF8307FF80211C7E9B26>I<FFFF800F00E00F00
  708. 780F003C0F001C0F001E0F001E0F001E0F001E0F001E0F001C0F003C0F00780F00E00FFF800F00
  709. 000F00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F0000FFF000171C
  710. 7E9B1C>80 D<07E0801C1980300580700380600180E00180E00080E00080E00080F00000F80000
  711. 7C00007FC0003FF8001FFE0007FF0000FF80000F800007C00003C00001C08001C08001C08001C0
  712. C00180C00180E00300D00200CC0C0083F800121E7E9C17>83 D<7FFFFFC0700F01C0600F00C040
  713. 0F0040400F0040C00F0020800F0020800F0020800F0020000F0000000F0000000F0000000F0000
  714. 000F0000000F0000000F0000000F0000000F0000000F0000000F0000000F0000000F0000000F00
  715. 00000F0000000F0000000F0000001F800003FFFC001B1C7F9B1E>I<FFF07FC00F000E000F0004
  716. 000F0004000F0004000F0004000F0004000F0004000F0004000F0004000F0004000F0004000F00
  717. 04000F0004000F0004000F0004000F0004000F0004000F0004000F0004000F0004000F00040007
  718. 00080007800800038010000180100000C020000070C000001F00001A1D7E9B1F>I<FFE0FFE0FF
  719. 1F001F003C1E001E00180F001F00100F001F00100F001F001007801F0020078027802007802780
  720. 2003C027804003C043C04003C043C04003E043C04001E081E08001E081E08001E081E08000F100
  721. F10000F100F10000F100F100007900FA00007A007A00007A007A00003E007C00003C003C00003C
  722. 003C00003C003C00001800180000180018000018001800281D7F9B2B>87
  723. D<08081010202040404040808080808080B0B0F8F8787830300D0C7A9C15>92
  724. D<1FC000307000783800781C00301C00001C00001C0001FC000F1C00381C00701C00601C00E01C
  725. 40E01C40E01C40603C40304E801F870012127E9115>97 D<FC00001C00001C00001C00001C0000
  726. 1C00001C00001C00001C00001C00001C00001C7C001D86001E03001C01801C01C01C00C01C00E0
  727. 1C00E01C00E01C00E01C00E01C00E01C00C01C01C01C01801E030019060010F800131D7F9C17>
  728. I<07E00C301878307870306000E000E000E000E000E000E00060007004300418080C3007C00E12
  729. 7E9112>I<003F0000070000070000070000070000070000070000070000070000070000070003
  730. E7000C1700180F00300700700700600700E00700E00700E00700E00700E00700E0070060070070
  731. 0700300700180F000C370007C7E0131D7E9C17>I<03E00C301818300C700E6006E006FFFEE000
  732. E000E000E00060007002300218040C1803E00F127F9112>I<00F8018C071E061E0E0C0E000E00
  733. 0E000E000E000E00FFE00E000E000E000E000E000E000E000E000E000E000E000E000E000E000E
  734. 000E007FE00F1D809C0D>I<00038003C4C00C38C01C3880181800381C00381C00381C00381C00
  735. 1818001C38000C300013C0001000003000001800001FF8001FFF001FFF803003806001C0C000C0
  736. C000C0C000C06001803003001C0E0007F800121C7F9215>I<FC00001C00001C00001C00001C00
  737. 001C00001C00001C00001C00001C00001C00001C7C001C87001D03001E03801C03801C03801C03
  738. 801C03801C03801C03801C03801C03801C03801C03801C03801C03801C0380FF9FF0141D7F9C17
  739. >I<18003C003C0018000000000000000000000000000000FC001C001C001C001C001C001C001C
  740. 001C001C001C001C001C001C001C001C001C00FF80091D7F9C0C>I<FC00001C00001C00001C00
  741. 001C00001C00001C00001C00001C00001C00001C00001C3FC01C0F001C0C001C08001C10001C20
  742. 001C40001CE0001DE0001E70001C78001C38001C3C001C1C001C0E001C0F001C0F80FF9FE0131D
  743. 7F9C16>107 D<FC001C001C001C001C001C001C001C001C001C001C001C001C001C001C001C00
  744. 1C001C001C001C001C001C001C001C001C001C001C001C00FF80091D7F9C0C>I<FC7E07E0001C
  745. 838838001D019018001E01E01C001C01C01C001C01C01C001C01C01C001C01C01C001C01C01C00
  746. 1C01C01C001C01C01C001C01C01C001C01C01C001C01C01C001C01C01C001C01C01C001C01C01C
  747. 00FF8FF8FF8021127F9124>I<FC7C001C87001D03001E03801C03801C03801C03801C03801C03
  748. 801C03801C03801C03801C03801C03801C03801C03801C0380FF9FF014127F9117>I<03F0000E
  749. 1C00180600300300700380600180E001C0E001C0E001C0E001C0E001C0E001C060018070038030
  750. 03001806000E1C0003F00012127F9115>I<FC7C001D86001E03001C01801C01C01C00C01C00E0
  751. 1C00E01C00E01C00E01C00E01C00E01C01C01C01C01C01801E03001D06001CF8001C00001C0000
  752. 1C00001C00001C00001C00001C0000FF8000131A7F9117>I<03C1000C3300180B00300F007007
  753. 00700700E00700E00700E00700E00700E00700E00700600700700700300F00180F000C370007C7
  754. 00000700000700000700000700000700000700000700003FE0131A7E9116>I<FCE01D301E781E
  755. 781C301C001C001C001C001C001C001C001C001C001C001C001C00FFC00D127F9110>I<1F9030
  756. 704030C010C010E010F8007F803FE00FF000F880388018C018C018E010D0608FC00D127F9110>
  757. I<04000400040004000C000C001C003C00FFE01C001C001C001C001C001C001C001C001C001C10
  758. 1C101C101C101C100C100E2003C00C1A7F9910>I<FC1F801C03801C03801C03801C03801C0380
  759. 1C03801C03801C03801C03801C03801C03801C03801C03801C07800C07800E1B8003E3F014127F
  760. 9117>I<FF07E03C03801C01001C01000E02000E020007040007040007040003880003880003D8
  761. 0001D00001D00000E00000E00000E00000400013127F9116>I<FF3FCFE03C0F03801C0701801C
  762. 0701001C0B01000E0B82000E0B82000E1182000711C4000711C4000720C40003A0E80003A0E800
  763. 03C0680001C0700001C0700001803000008020001B127F911E>I<7F8FF00F03800F0300070200
  764. 03840001C80001D80000F00000700000780000F800009C00010E00020E000607000403801E07C0
  765. FF0FF81512809116>I<FF07E03C03801C01001C01000E02000E02000704000704000704000388
  766. 0003880003D80001D00001D00000E00000E00000E000004000004000008000008000F08000F100
  767. 00F300006600003C0000131A7F9116>I E /Fl 7 117 df<00038000000380000007C0000007C0
  768. 000007C000000FE000000FE000001FF000001BF000001BF0000031F8000031F8000061FC000060
  769. FC0000E0FE0000C07E0000C07E0001803F0001FFFF0003FFFF8003001F8003001F8006000FC006
  770. 000FC00E000FE00C0007E0FFC07FFEFFC07FFE1F1C7E9B24>65 D<0FF8001C1E003E0F803E0780
  771. 3E07C01C07C00007C0007FC007E7C01F07C03C07C07C07C0F807C0F807C0F807C0780BC03E13F8
  772. 0FE1F815127F9117>97 D<FF0000FF00001F00001F00001F00001F00001F00001F00001F00001F
  773. 00001F00001F3F801FE1E01F80701F00781F003C1F003C1F003E1F003E1F003E1F003E1F003E1F
  774. 003E1F003C1F003C1F00781F80701EC1E01C3F00171D7F9C1B>I<03FC000E0E001C1F003C1F00
  775. 781F00780E00F80000F80000F80000F80000F80000F800007800007801803C01801C03000E0E00
  776. 03F80011127E9115>I<FE3E00FE47001E8F801E8F801E8F801F07001F00001F00001F00001F00
  777. 001F00001F00001F00001F00001F00001F0000FFF000FFF00011127F9114>114
  778. D<1FD830786018E018E018F000FF807FE07FF01FF807FC007CC01CC01CE01CE018F830CFC00E12
  779. 7E9113>I<0300030003000300070007000F000F003FFCFFFC1F001F001F001F001F001F001F00
  780. 1F001F001F0C1F0C1F0C1F0C0F08079803F00E1A7F9913>I E /Fm 39 121
  781. df<FFFCFFFCFFFCFFFC0E047F8C13>45 D<387CFEFEFE7C3807077C8610>I<00180000780001F8
  782. 00FFF800FFF80001F80001F80001F80001F80001F80001F80001F80001F80001F80001F80001F8
  783. 0001F80001F80001F80001F80001F80001F80001F80001F80001F80001F80001F80001F80001F8
  784. 0001F8007FFFE07FFFE013207C9F1C>49 D<03FC000FFF003C1FC07007E07C07F0FE03F0FE03F8
  785. FE03F8FE01F87C01F83803F80003F80003F00003F00007E00007C0000F80001F00003E00003800
  786. 00700000E01801C0180380180700180E00380FFFF01FFFF03FFFF07FFFF0FFFFF0FFFFF015207D
  787. 9F1C>I<00FE0007FFC00F07E01E03F03F03F03F81F83F81F83F81F81F03F81F03F00003F00003
  788. E00007C0001F8001FE0001FF000007C00001F00001F80000FC0000FC3C00FE7E00FEFF00FEFF00
  789. FEFF00FEFF00FC7E01FC7801F81E07F00FFFC001FE0017207E9F1C>I<00007000000000700000
  790. 0000F800000000F800000000F800000001FC00000001FC00000003FE00000003FE00000003FE00
  791. 000006FF000000067F0000000E7F8000000C3F8000000C3F800000183FC00000181FC00000381F
  792. E00000300FE00000300FE00000600FF000006007F00000E007F80000FFFFF80000FFFFF8000180
  793. 01FC00018001FC00038001FE00030000FE00030000FE000600007F000600007F00FFE00FFFF8FF
  794. E00FFFF825227EA12A>65 D<FFFFFF8000FFFFFFE00007F001F80007F000FC0007F0007E0007F0
  795. 007E0007F0007F0007F0007F0007F0007F0007F0007F0007F0007F0007F0007E0007F000FE0007
  796. F000FC0007F003F80007FFFFF00007FFFFF00007F001FC0007F0007E0007F0003F0007F0003F80
  797. 07F0001F8007F0001FC007F0001FC007F0001FC007F0001FC007F0001FC007F0001FC007F0003F
  798. 8007F0003F8007F0007F0007F001FE00FFFFFFF800FFFFFFC00022227EA128>I<FFFFFF8000FF
  799. FFFFF00007F003FC0007F0007E0007F0003F0007F0001F8007F0000FC007F00007E007F00007E0
  800. 07F00007F007F00003F007F00003F007F00003F007F00003F807F00003F807F00003F807F00003
  801. F807F00003F807F00003F807F00003F807F00003F807F00003F807F00003F007F00003F007F000
  802. 03F007F00007E007F00007E007F0000FC007F0001F8007F0003F0007F0007E0007F003FC00FFFF
  803. FFF000FFFFFF800025227EA12B>68 D<FFFFFFFCFFFFFFFC07F000FC07F0003C07F0001C07F000
  804. 0C07F0000E07F0000E07F0000607F0180607F0180607F0180607F0180007F0380007F0780007FF
  805. F80007FFF80007F0780007F0380007F0180007F0180007F0180307F0180307F0000307F0000607
  806. F0000607F0000607F0000E07F0000E07F0001E07F0003E07F001FCFFFFFFFCFFFFFFFC20227EA1
  807. 25>I<FFFFFFF8FFFFFFF807F001F807F0007807F0003807F0001807F0001C07F0001C07F0000C
  808. 07F0000C07F0180C07F0180C07F0180007F0180007F0380007F0780007FFF80007FFF80007F078
  809. 0007F0380007F0180007F0180007F0180007F0180007F0000007F0000007F0000007F0000007F0
  810. 000007F0000007F0000007F00000FFFFE000FFFFE0001E227EA123>I<FFFFE0FFFFE003F80003
  811. F80003F80003F80003F80003F80003F80003F80003F80003F80003F80003F80003F80003F80003
  812. F80003F80003F80003F80003F80003F80003F80003F80003F80003F80003F80003F80003F80003
  813. F80003F80003F800FFFFE0FFFFE013227FA115>73 D<FFFFE000FFFFE00007F0000007F0000007
  814. F0000007F0000007F0000007F0000007F0000007F0000007F0000007F0000007F0000007F00000
  815. 07F0000007F0000007F0000007F0000007F0000007F0000007F0000007F0001807F0001807F000
  816. 1807F0001807F0003807F0003807F0007007F0007007F000F007F001F007F007F0FFFFFFF0FFFF
  817. FFF01D227EA122>76 D<FFF000000FFFFFF800001FFF07F800001FE006FC000037E006FC000037
  818. E006FC000037E0067E000067E0067E000067E0063F0000C7E0063F0000C7E0061F800187E0061F
  819. 800187E0060FC00307E0060FC00307E0060FC00307E00607E00607E00607E00607E00603F00C07
  820. E00603F00C07E00601F81807E00601F81807E00601F81807E00600FC3007E00600FC3007E00600
  821. 7E6007E006007E6007E006003FC007E006003FC007E006001F8007E006001F8007E006001F8007
  822. E006000F0007E0FFF00F00FFFFFFF00600FFFF30227EA135>I<FFF8001FFEFFFC001FFE07FC00
  823. 00C007FE0000C006FF0000C0067F8000C0063FC000C0061FE000C0060FE000C0060FF000C00607
  824. F800C00603FC00C00601FE00C00600FE00C00600FF00C006007F80C006003FC0C006001FE0C006
  825. 000FF0C0060007F0C0060007F8C0060003FCC0060001FEC0060000FFC00600007FC00600007FC0
  826. 0600003FC00600001FC00600000FC006000007C006000003C006000003C0FFF00001C0FFF00000
  827. C027227EA12C>I<0007FC0000003FFF800000FC07E00003F001F80007E000FC000FC0007E001F
  828. 80003F001F80003F003F00001F803F00001F807F00001FC07E00000FC07E00000FC0FE00000FE0
  829. FE00000FE0FE00000FE0FE00000FE0FE00000FE0FE00000FE0FE00000FE0FE00000FE0FE00000F
  830. E07E00000FC07F00001FC07F00001FC03F00001F803F80003F801F80003F000FC0007E0007E000
  831. FC0003F001F80000FC07E000003FFF80000007FC000023227DA12A>I<FFFFFF00FFFFFFE007F0
  832. 07F007F001FC07F000FC07F0007E07F0007E07F0007F07F0007F07F0007F07F0007F07F0007F07
  833. F0007E07F0007E07F000FC07F001FC07F007F007FFFFE007FFFF0007F0000007F0000007F00000
  834. 07F0000007F0000007F0000007F0000007F0000007F0000007F0000007F0000007F0000007F000
  835. 00FFFF8000FFFF800020227EA126>I<FFFFFE0000FFFFFFC00007F007F00007F001F80007F000
  836. FC0007F0007E0007F0007F0007F0007F0007F0007F0007F0007F0007F0007F0007F0007F0007F0
  837. 007E0007F000FC0007F001F80007F007F00007FFFFC00007FFFF800007F00FE00007F007F00007
  838. F003F80007F001FC0007F001FC0007F001FC0007F001FC0007F001FC0007F001FC0007F001FC00
  839. 07F001FC0007F001FC0607F000FE0607F000FF0CFFFF803FF8FFFF800FF027227EA12A>82
  840. D<01FC0407FF8C1F03FC3C007C7C003C78001C78001CF8000CF8000CFC000CFC0000FF0000FFE0
  841. 007FFF007FFFC03FFFF01FFFF80FFFFC03FFFE003FFE0003FF00007F00003F00003FC0001FC000
  842. 1FC0001FE0001EE0001EF0003CFC003CFF00F8C7FFE080FF8018227DA11F>I<7FFFFFFF807FFF
  843. FFFF807E03F80F807803F807807003F803806003F80180E003F801C0E003F801C0C003F800C0C0
  844. 03F800C0C003F800C0C003F800C00003F800000003F800000003F800000003F800000003F80000
  845. 0003F800000003F800000003F800000003F800000003F800000003F800000003F800000003F800
  846. 000003F800000003F800000003F800000003F800000003F800000003F800000003F8000003FFFF
  847. F80003FFFFF80022227EA127>I<FFFF800FFEFFFF800FFE07F80000C007F80001C003FC000180
  848. 01FE00030001FE00070000FF00060000FF000C00007F801C00003FC01800003FC03000001FE070
  849. 00000FF06000000FF0E0000007F8C0000003FD80000003FF80000001FF00000001FE00000000FE
  850. 00000000FE00000000FE00000000FE00000000FE00000000FE00000000FE00000000FE00000000
  851. FE00000000FE00000000FE00000000FE0000001FFFF000001FFFF00027227FA12A>89
  852. D<07FC001FFF803F07C03F03E03F01E03F01F01E01F00001F00001F0003FF003FDF01FC1F03F01
  853. F07E01F0FC01F0FC01F0FC01F0FC01F07E02F07E0CF81FF87F07E03F18167E951B>97
  854. D<FF000000FF0000001F0000001F0000001F0000001F0000001F0000001F0000001F0000001F00
  855. 00001F0000001F0000001F0000001F0FE0001F3FF8001FF07C001F801E001F001F001F000F801F
  856. 000F801F000FC01F000FC01F000FC01F000FC01F000FC01F000FC01F000FC01F000FC01F000F80
  857. 1F001F801F801F001FC03E001EE07C001C3FF800180FC0001A237EA21F>I<00FF8007FFE00F83
  858. F01F03F03E03F07E03F07C01E07C0000FC0000FC0000FC0000FC0000FC0000FC00007C00007E00
  859. 007E00003E00301F00600FC0E007FF8000FE0014167E9519>I<0001FE000001FE0000003E0000
  860. 003E0000003E0000003E0000003E0000003E0000003E0000003E0000003E0000003E0000003E00
  861. 01FC3E0007FFBE000F81FE001F007E003E003E007E003E007C003E00FC003E00FC003E00FC003E
  862. 00FC003E00FC003E00FC003E00FC003E00FC003E007C003E007C003E003E007E001E00FE000F83
  863. BE0007FF3FC001FC3FC01A237EA21F>I<00FE0007FF800F87C01E01E03E01F07C00F07C00F8FC
  864. 00F8FC00F8FFFFF8FFFFF8FC0000FC0000FC00007C00007C00007E00003E00181F00300FC07003
  865. FFC000FF0015167E951A>I<03FC1E0FFF7F1F0F8F3E07CF3C03C07C03E07C03E07C03E07C03E0
  866. 7C03E03C03C03E07C01F0F801FFF0013FC003000003000003800003FFF801FFFF00FFFF81FFFFC
  867. 3800FC70003EF0001EF0001EF0001EF0001E78003C7C007C3F01F80FFFE001FF0018217E951C>
  868. 103 D<FF000000FF0000001F0000001F0000001F0000001F0000001F0000001F0000001F000000
  869. 1F0000001F0000001F0000001F0000001F07E0001F1FF8001F307C001F403C001F803E001F803E
  870. 001F003E001F003E001F003E001F003E001F003E001F003E001F003E001F003E001F003E001F00
  871. 3E001F003E001F003E001F003E001F003E00FFE1FFC0FFE1FFC01A237EA21F>I<1C003E007F00
  872. 7F007F003E001C000000000000000000000000000000FF00FF001F001F001F001F001F001F001F
  873. 001F001F001F001F001F001F001F001F001F001F001F00FFE0FFE00B247EA310>I<FF000000FF
  874. 0000001F0000001F0000001F0000001F0000001F0000001F0000001F0000001F0000001F000000
  875. 1F0000001F0000001F00FF801F00FF801F0038001F0060001F01C0001F0380001F0700001F0E00
  876. 001F1C00001F7E00001FFF00001FCF00001F0F80001F07C0001F03E0001F01E0001F01F0001F00
  877. F8001F007C001F003C00FFE0FFC0FFE0FFC01A237EA21E>107 D<FF00FF001F001F001F001F00
  878. 1F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F
  879. 001F001F001F001F001F001F001F00FFE0FFE00B237EA210>I<FF07F007F000FF1FFC1FFC001F
  880. 303E303E001F403E403E001F801F801F001F801F801F001F001F001F001F001F001F001F001F00
  881. 1F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F001F
  882. 001F001F001F001F001F001F001F001F001F001F001F001F001F001F00FFE0FFE0FFE0FFE0FFE0
  883. FFE02B167E9530>I<FF07E000FF1FF8001F307C001F403C001F803E001F803E001F003E001F00
  884. 3E001F003E001F003E001F003E001F003E001F003E001F003E001F003E001F003E001F003E001F
  885. 003E001F003E001F003E00FFE1FFC0FFE1FFC01A167E951F>I<00FE0007FFC00F83E01E00F03E
  886. 00F87C007C7C007C7C007CFC007EFC007EFC007EFC007EFC007EFC007EFC007E7C007C7C007C3E
  887. 00F81F01F00F83E007FFC000FE0017167E951C>I<FF0FE000FF3FF8001FF07C001F803E001F00
  888. 1F001F001F801F001F801F000FC01F000FC01F000FC01F000FC01F000FC01F000FC01F000FC01F
  889. 000FC01F001F801F001F801F803F001FC03E001FE0FC001F3FF8001F0FC0001F0000001F000000
  890. 1F0000001F0000001F0000001F0000001F0000001F000000FFE00000FFE000001A207E951F>I<
  891. FE1F00FE3FC01E67E01EC7E01E87E01E87E01F83C01F00001F00001F00001F00001F00001F0000
  892. 1F00001F00001F00001F00001F00001F00001F0000FFF000FFF00013167E9517>114
  893. D<0FF3003FFF00781F00600700E00300E00300F00300FC00007FE0007FF8003FFE000FFF0001FF
  894. 00000F80C00780C00380E00380E00380F00700FC0E00EFFC00C7F00011167E9516>I<01800001
  895. 80000180000180000380000380000780000780000F80003F8000FFFF00FFFF000F80000F80000F
  896. 80000F80000F80000F80000F80000F80000F80000F80000F80000F81800F81800F81800F81800F
  897. 81800F830007C30003FE0000F80011207F9F16>I<FF01FE00FF01FE001F003E001F003E001F00
  898. 3E001F003E001F003E001F003E001F003E001F003E001F003E001F003E001F003E001F003E001F
  899. 003E001F003E001F003E001F007E001F00FE000F81BE0007FF3FC001FC3FC01A167E951F>I<FF
  900. E07FC0FFE07FC00F801C0007C0380003E0700003F0600001F8C00000F98000007F8000003F0000
  901. 001F0000001F8000003FC0000037C0000063E00000C1F00001C0F8000380FC0007007E000E003E
  902. 00FF80FFE0FF80FFE01B167F951E>120 D E /Fn 12 117 df<3078FCFC7830060676851A>46
  903. D<003E0001FF8003FFC007C1E00F00E01E0F703C3FF0387FF07070F870E07870E078E1C038E1C0
  904. 38E1C038E1C038E1C038E1C038E1C038E1C03870E07070E0707070E0387FE03C3FC01E0F000F00
  905. 3807C0F803FFF001FFE0003F00151E7E9D1A>64 D<1FF0003FFC007FFE00780F00300700000380
  906. 000380007F8007FF801FFF803F8380780380700380E00380E00380E00380700780780F803FFFFC
  907. 1FFDFC07F0FC16157D941A>97 D<FE0000FE0000FE00000E00000E00000E00000E00000E00000E
  908. 00000E3E000EFF800FFFE00FC1F00F80700F00380E00380E001C0E001C0E001C0E001C0E001C0E
  909. 001C0E001C0F00380F00780F80F00FC1E00FFFC00EFF80063E00161E7F9D1A>I<00FF8003FFC0
  910. 0FFFE01F01E03C00C0780000700000700000E00000E00000E00000E00000E00000700000700000
  911. 7800703C00701F01F00FFFE003FFC000FE0014157D941A>I<01F80007FF000FFF801E07C03C01
  912. C07800E07000E0E00070E00070FFFFF0FFFFF0FFFFF0E000007000007000007800703C00701F01
  913. F00FFFE003FFC000FE0014157D941A>101 D<FE0000FE0000FE00000E00000E00000E00000E00
  914. 000E00000E00000E3E000EFF800FFFC00FC1C00F80E00F00E00E00E00E00E00E00E00E00E00E00
  915. E00E00E00E00E00E00E00E00E00E00E00E00E00E00E0FFE3FEFFE7FEFFE3FE171E7F9D1A>104
  916. D<7CE0E000FFFBF8007FFFF8001F1F1C001E1E1C001E1E1C001C1C1C001C1C1C001C1C1C001C1C
  917. 1C001C1C1C001C1C1C001C1C1C001C1C1C001C1C1C001C1C1C001C1C1C001C1C1C007F1F1F00FF
  918. 9F9F807F1F1F00191580941A>109 D<01F00007FC001FFF003E0F803C07807803C07001C0E000
  919. E0E000E0E000E0E000E0E000E0E000E0F001E07001C07803C03C07803E0F801FFF0007FC0001F0
  920. 0013157D941A>111 D<7F83F0FF8FF87FBFFC03FC3C03F01803E00003C00003C0000380000380
  921. 000380000380000380000380000380000380000380000380007FFF00FFFF007FFF0016157E941A
  922. >114 D<07FB801FFF807FFF80780780E00380E00380E003807800007FC0003FFC0007FE00003F
  923. 800007806001C0E001C0E001C0F003C0FC0780FFFF00EFFE00E3F80012157C941A>I<00C00001
  924. C00001C00001C00001C00001C00001C0007FFFE0FFFFE0FFFFE001C00001C00001C00001C00001
  925. C00001C00001C00001C00001C00001C00001C07001C07001C07001C07000E0E000FFE0007FC000
  926. 1F00141C7F9B1A>I E /Fo 25 124 df<003C000000006200000000C200000001810000000181
  927. 000000038100000003810000000381000000038100000003820000000382000000038400000003
  928. 8800000001C800000001D000000001E003FF8001C0007C0000E000380001E000300001F0002000
  929. 027000400004700040000838008000183C008000301C010000701E020000700E020000F0070400
  930. 00F007880000F003880000F001D00100F000E0010078007003003800B802003C031C04000E0C0E
  931. 0C0003F003F00021257EA326>38 D<70F8FCFC7404040404080810102040060F7C840E>44
  932. D<008003800F80F380038003800380038003800380038003800380038003800380038003800380
  933. 03800380038003800380038003800380038003800380038007C0FFFE0F217CA018>49
  934. D<03F8000C1E001007002007804007C07807C07803C07807C03807C0000780000780000700000F
  935. 00000E0000380003F000001C00000F000007800007800003C00003C00003E02003E07003E0F803
  936. E0F803E0F003C04003C0400780200780100F000C1C0003F00013227EA018>51
  937. D<000200000600000E00000E00001E00001E00002E00004E00004E00008E00008E00010E00020E
  938. 00020E00040E00040E00080E00100E00100E00200E00200E00400E00800E00FFFFF8000E00000E
  939. 00000E00000E00000E00000E00000E00001F0001FFF015217FA018>I<01F000060C000C060018
  940. 0700380380700380700380F001C0F001C0F001C0F001E0F001E0F001E0F001E0F001E07001E070
  941. 03E03803E01805E00C05E00619E003E1E00001C00001C00001C000038000038030030078070078
  942. 0600700C002018001030000FC00013227EA018>57 D<0001800000018000000180000003C00000
  943. 03C0000003C0000005E0000005E000000DF0000008F0000008F0000010F8000010780000107800
  944. 00203C0000203C0000203C0000401E0000401E0000401E0000800F0000800F0000FFFF00010007
  945. 8001000780030007C0020003C0020003C0040003E0040001E0040001E00C0000F00C0000F03E00
  946. 01F8FF800FFF20237EA225>65 D<FFFFF8000F800E0007800780078003C0078003E0078001E007
  947. 8001F0078001F0078001F0078001F0078001F0078001E0078003E0078007C007800F8007803E00
  948. 07FFFE0007800780078003C0078001E0078001F0078000F0078000F8078000F8078000F8078000
  949. F8078000F8078000F8078001F0078001F0078003E0078007C00F800F00FFFFFC001D227EA123>
  950. I<03FFF0001F00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F
  951. 00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F00000F
  952. 00700F00F80F00F80F00F80E00F01E00401C0020380018700007C00014237EA119>74
  953. D<FFFE00000FC00000078000000780000007800000078000000780000007800000078000000780
  954. 000007800000078000000780000007800000078000000780000007800000078000000780000007
  955. 800000078000000780000007800080078000800780008007800080078001800780018007800100
  956. 078003000780030007800F000F803F00FFFFFF0019227EA11E>76 D<FFC00003FF0FC00003F007
  957. C00003E005E00005E005E00005E004F00009E004F00009E004F00009E004780011E004780011E0
  958. 04780011E0043C0021E0043C0021E0043C0021E0041E0041E0041E0041E0040F0081E0040F0081
  959. E0040F0081E004078101E004078101E004078101E00403C201E00403C201E00401E401E00401E4
  960. 01E00401E401E00400F801E00400F801E00400F801E004007001E00E007001E01F007003F0FFE0
  961. 203FFF28227EA12D>I<7FFFFFF87807807860078018400780084007800840078008C007800C80
  962. 078004800780048007800480078004000780000007800000078000000780000007800000078000
  963. 000780000007800000078000000780000007800000078000000780000007800000078000000780
  964. 000007800000078000000780000007800000078000000FC00003FFFF001E227EA123>84
  965. D<0FE0001838003C0C003C0E0018070000070000070000070000FF0007C7001E07003C07007807
  966. 00700700F00708F00708F00708F00F087817083C23900FC1E015157E9418>97
  967. D<0E0000FE00001E00000E00000E00000E00000E00000E00000E00000E00000E00000E00000E00
  968. 000E00000E1F000E61C00E80600F00300E00380E003C0E001C0E001E0E001E0E001E0E001E0E00
  969. 1E0E001E0E001E0E001C0E003C0E00380F00700C80600C41C0083F0017237FA21B>I<01FC0007
  970. 07000C03801C01C03801C07801E07000E0F000E0FFFFE0F00000F00000F00000F00000F0000070
  971. 00007800203800201C00400E008007030000FC0013157F9416>101 D<1C003E003E003E001C00
  972. 000000000000000000000000000000000E00FE001E000E000E000E000E000E000E000E000E000E
  973. 000E000E000E000E000E000E000E000E00FFC00A227FA10E>105 D<0E00FE001E000E000E000E
  974. 000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E000E00
  975. 0E000E000E000E000E000E000E000E000E00FFE00B237FA20E>108 D<0E1F80FE60C01E80E00F
  976. 00700F00700E00700E00700E00700E00700E00700E00700E00700E00700E00700E00700E00700E
  977. 00700E00700E00700E0070FFE7FF18157F941B>110 D<01FC000707000C01801800C03800E070
  978. 0070700070F00078F00078F00078F00078F00078F00078F000787000707800F03800E01C01C00E
  979. 038007070001FC0015157F9418>I<0E3CFE461E8F0F0F0F060F000E000E000E000E000E000E00
  980. 0E000E000E000E000E000E000E000F00FFF010157F9413>114 D<0F8830786018C018C008C008
  981. E008F0007F803FE00FF001F8003C801C800C800CC00CC008E018D0308FC00E157E9413>I<0200
  982. 0200020002000600060006000E001E003E00FFF80E000E000E000E000E000E000E000E000E000E
  983. 000E000E040E040E040E040E040E040708030801F00E1F7F9E13>I<0E0070FE07F01E00F00E00
  984. 700E00700E00700E00700E00700E00700E00700E00700E00700E00700E00700E00700E00700E00
  985. F00E00F006017003827800FC7F18157F941B>I<3FFFC0380380300780200700600E00401C0040
  986. 3C0040380000700000E00001E00001C0000380400700400F00400E00C01C008038008078018070
  987. 0780FFFF8012157F9416>122 D<FFFFFE1701808C18>I E /Fp 1 4 df<00C00000C00000C000
  988. 00C00000C000C0C0C0F0C3C038C7000EDC0003F00000C00003F0000EDC0038C700F0C3C0C0C0C0
  989. 00C00000C00000C00000C00000C00012157D9619>3 D E /Fq 20 122 df<FFFFFFFFE0FFFFFF
  990. FFE007E0000FE003E00001E003E00000F003E000007003E000003003E000003003E000001003E0
  991. 00001003E000001003E000001003E000000803E000000803E000000803E000800803E000800003
  992. E000800003E000800003E000800003E001800003E001800003E007800003FFFF800003FFFF8000
  993. 03E007800003E001800003E001800003E000800003E000800003E000800003E000800203E00080
  994. 0203E000000203E000000403E000000403E000000403E000000403E000000C03E000000C03E000
  995. 000803E000001803E000001803E000003803E000007803E00001F807E0000FF0FFFFFFFFF0FFFF
  996. FFFFF027317CB02D>69 D<FFFFFFFFC0FFFFFFFFC007E0001FC003E00003C003E00001E003E000
  997. 00E003E000006003E000006003E000002003E000002003E000002003E000002003E000001003E0
  998. 00001003E000001003E000801003E000800003E000800003E000800003E000800003E001800003
  999. E001800003E007800003FFFF800003FFFF800003E007800003E001800003E001800003E0008000
  1000. 03E000800003E000800003E000800003E000800003E000000003E000000003E000000003E00000
  1001. 0003E000000003E000000003E000000003E000000003E000000003E000000003E000000003E000
  1002. 000003E000000007F0000000FFFFC00000FFFFC0000024317CB02B>I<FFFFFFC000FFFFFFF800
  1003. 07E0007E0003E0001F0003E000078003E00003C003E00001E003E00001F003E00001F003E00000
  1004. F003E00000F803E00000F803E00000F803E00000F803E00000F803E00000F803E00000F003E000
  1005. 01F003E00001E003E00003E003E00003C003E000078003E0001F0003E0007C0003FFFFF00003E0
  1006. 00000003E000000003E000000003E000000003E000000003E000000003E000000003E000000003
  1007. E000000003E000000003E000000003E000000003E000000003E000000003E000000003E0000000
  1008. 03E000000003E000000003E000000003E000000003E000000007F0000000FFFF800000FFFF8000
  1009. 0025317CB02D>80 D<007F802001FFE02007C078600F001C601E0006E03C0003E0380001E07800
  1010. 00E0700000E070000060F0000060F0000060F0000020F0000020F0000020F8000020F80000007C
  1011. 0000007E0000003F0000003FC000001FF800000FFF800007FFF80003FFFC0000FFFF00000FFF80
  1012. 0000FFC000001FE0000007E0000003F0000001F0000000F0000000F8000000F880000078800000
  1013. 78800000788000007880000078C0000078C0000070E00000F0E00000E0F00000E0F80001C0EC00
  1014. 0380C7000700C1F01E00807FFC00800FF0001D337CB125>83 D<00FE00000303C0000C00E00010
  1015. 007000100038003C003C003E001C003E001E003E001E0008001E0000001E0000001E0000001E00
  1016. 000FFE0000FC1E0003E01E000F801E001F001E003E001E003C001E007C001E00F8001E04F8001E
  1017. 04F8001E04F8003E04F8003E0478003E047C005E043E008F080F0307F003FC03E01E1F7D9E21>
  1018. 97 D<003F8000E0600380180700040F00041E001E1C003E3C003E7C003E7C0008780000F80000
  1019. F80000F80000F80000F80000F80000F80000F80000F800007800007C00007C00003C00011E0001
  1020. 1E00020F000207000403801800E060003F80181F7D9E1D>99 D<000001E000003FE000003FE000
  1021. 0003E0000001E0000001E0000001E0000001E0000001E0000001E0000001E0000001E0000001E0
  1022. 000001E0000001E0000001E0000001E0000001E0000001E0001F81E000F061E001C019E0078005
  1023. E00F0003E00E0003E01E0001E03C0001E03C0001E07C0001E0780001E0F80001E0F80001E0F800
  1024. 01E0F80001E0F80001E0F80001E0F80001E0F80001E0F80001E0780001E0780001E03C0001E03C
  1025. 0001E01C0001E01E0003E00E0005E0070009E0038011F000E061FF003F81FF20327DB125>I<00
  1026. 3F800000E0E0000380380007003C000E001E001E001E001C000F003C000F007C000F0078000F80
  1027. 78000780F8000780F8000780FFFFFF80F8000000F8000000F8000000F8000000F8000000F80000
  1028. 00780000007C0000003C0000003C0000801E0000800E0001000F0002000780020001C00C0000F0
  1029. 3000001FC000191F7E9E1D>I<0780000000FF80000000FF800000000F80000000078000000007
  1030. 800000000780000000078000000007800000000780000000078000000007800000000780000000
  1031. 0780000000078000000007800000000780000000078000000007800000000780FE000007830780
  1032. 00078C03C000079001E00007A001E00007A000F00007C000F00007C000F000078000F000078000
  1033. F000078000F000078000F000078000F000078000F000078000F000078000F000078000F0000780
  1034. 00F000078000F000078000F000078000F000078000F000078000F000078000F000078000F00007
  1035. 8000F000078000F000078000F0000FC001F800FFFC1FFF80FFFC1FFF8021327EB125>104
  1036. D<0F001F801F801F801F800F00000000000000000000000000000000000000000000000780FF80
  1037. FF800F800780078007800780078007800780078007800780078007800780078007800780078007
  1038. 800780078007800780078007800FC0FFF8FFF80D307EAF12>I<0780FF80FF800F800780078007
  1039. 800780078007800780078007800780078007800780078007800780078007800780078007800780
  1040. 078007800780078007800780078007800780078007800780078007800780078007800780078007
  1041. 8007800FC0FFFCFFFC0E327EB112>108 D<0780FE0000FF83078000FF8C03C0000F9001E00007
  1042. A001E00007A000F00007C000F00007C000F000078000F000078000F000078000F000078000F000
  1043. 078000F000078000F000078000F000078000F000078000F000078000F000078000F000078000F0
  1044. 00078000F000078000F000078000F000078000F000078000F000078000F000078000F000078000
  1045. F0000FC001F800FFFC1FFF80FFFC1FFF80211F7E9E25>110 D<001FC00000F0780001C01C0007
  1046. 0007000F0007801E0003C01C0001C03C0001E03C0001E0780000F0780000F0780000F0F80000F8
  1047. F80000F8F80000F8F80000F8F80000F8F80000F8F80000F8F80000F8780000F07C0001F03C0001
  1048. E03C0001E01E0003C01E0003C00F00078007800F0001C01C0000F07800001FC0001D1F7E9E21>
  1049. I<0781FC00FF860700FF8803C00F9001E007A000F007C00078078000780780003C0780003C0780
  1050. 003E0780001E0780001F0780001F0780001F0780001F0780001F0780001F0780001F0780001F07
  1051. 80001F0780003E0780003E0780003C0780007C0780007807C000F007A000F007A001E007980380
  1052. 07860F000781F80007800000078000000780000007800000078000000780000007800000078000
  1053. 000780000007800000078000000FC00000FFFC0000FFFC0000202D7E9E25>I<0783E0FF8C18FF
  1054. 907C0F907C07A07C07C03807C00007C00007C00007800007800007800007800007800007800007
  1055. 80000780000780000780000780000780000780000780000780000780000780000780000780000F
  1056. C000FFFE00FFFE00161F7E9E19>114 D<01FC100E03301800F0300070600030E00030E00010E0
  1057. 0010E00010F00010F800007E00003FF0001FFF000FFFC003FFE0003FF00001F80000F880003C80
  1058. 003C80001CC0001CC0001CE0001CE00018F00038F00030CC0060C301C080FE00161F7E9E1A>I<
  1059. 00400000400000400000400000400000C00000C00000C00001C00001C00003C00007C0000FC000
  1060. 1FFFE0FFFFE003C00003C00003C00003C00003C00003C00003C00003C00003C00003C00003C000
  1061. 03C00003C00003C00003C00003C00003C01003C01003C01003C01003C01003C01003C01003C010
  1062. 01C02001E02000E0400078C0001F00142C7FAB19>I<078000F000FF801FF000FF801FF0000F80
  1063. 01F000078000F000078000F000078000F000078000F000078000F000078000F000078000F00007
  1064. 8000F000078000F000078000F000078000F000078000F000078000F000078000F000078000F000
  1065. 078000F000078000F000078000F000078000F000078001F000078001F000078001F000038002F0
  1066. 0003C004F00001C008F800007030FF80001FC0FF80211F7E9E25>I<FFF07FF80FFCFFF07FF80F
  1067. FC0FC007C003F00F8003C001C0078003C00080078003C0008003C003E0010003C003E0010003C0
  1068. 07E0010001E004F0020001E004F0020001E00870020000F00878040000F00878040000F0103804
  1069. 000078103C08000078103C08000078201C0800003C201E1000003C201E1000003C400E1000001E
  1070. 400F2000001E400F2000001E80072000000F8007C000000F8007C000000F0003C0000007000380
  1071. 000007000380000006000180000002000100002E1F7F9E30>119 D<FFF801FF80FFF801FF800F
  1072. C0007C00078000380007C000300003C000200003C000200001E000400001E000400001F0004000
  1073. 00F000800000F000800000780100000078010000007C010000003C020000003C020000001E0400
  1074. 00001E040000001F040000000F080000000F080000000790000000079000000007D000000003E0
  1075. 00000003E000000001C000000001C000000001C000000000800000000080000000010000000001
  1076. 00000000010000000002000000000200000000040000007004000000F80C000000F808000000F8
  1077. 10000000703000000030400000001F80000000212D7F9E23>121 D E end
  1078. %%EndProlog
  1079. %%BeginSetup
  1080. %%Feature: *Resolution 300dpi
  1081. TeXDict begin
  1082.  
  1083. %%EndSetup
  1084. %%Page: 1 1
  1085. 0 bop 191 232 a Fq(Proto)r(col)22 b(F)-6 b(ailure)22 b(in)f(the)h(Escro)n(w)n
  1086. (ed)g(Encryption)f(Standard)1760 206 y Fp(\003)855 359 y Fo(Matt)c(Blaze)713
  1087. 417 y(A)l(T&T)f(Bell)e(Lab)q(oratories)719 475 y Fn(mab@resea)o(rch)o(.at)o
  1088. (t.)o(com)497 576 y Fo(June)i(3,)g(1994)i({)e Fm(PRELIMINAR)-5
  1089. b(Y)19 b(DRAFT)884 744 y Fl(Abstract)176 820 y Fk(The)12 b(Escro)o(w)o(ed)g
  1090. (Encryption)g(Standard)f(\(EES\))h(de\014nes)h(a)e(US)g(Go)o(v)o(ernmen)o(t)f
  1091. (family)e(of)j(cryptographic)114 870 y(pro)q(cessors,)20 b(p)q(opularly)e
  1092. (kno)o(wn)f(as)h(\\Clipp)q(er")g(c)o(hips,)h(in)o(tended)f(to)g(protect)i
  1093. (unclassi\014ed)e(go)o(v)o(ernmen)o(t)114 919 y(and)11 b(priv)n(ate-sector)i
  1094. (comm)o(unications)c(and)j(data.)17 b(A)12 b(basic)g(feature)h(of)e(k)o(ey)h
  1095. (setup)h(b)q(et)o(w)o(een)h(pairs)d(of)h(EES)114 969 y(pro)q(cessors)h(in)o
  1096. (v)o(olv)o(es)e(the)h(exc)o(hange)h(of)e(a)g(\\La)o(w)g(Enforcemen)o(t)g
  1097. (Access)j(Field")d(\(LEAF\))h(that)g(con)o(tains)g(an)114 1019
  1098. y(encrypted)h(cop)o(y)e(of)g(the)h(curren)o(t)h(session)f(k)o(ey)m(.)17
  1099. b(The)12 b(LEAF)g(is)f(in)o(tended)h(to)g(facilitate)e(go)o(v)o(ernmen)o(t)h
  1100. (access)114 1069 y(to)j(the)h(cleartext)g(of)f(data)g(encrypted)i(under)f
  1101. (the)g(system.)k(Sev)o(eral)c(asp)q(ects)h(of)d(the)i(design)g(of)e(the)i
  1102. (EES,)114 1119 y(whic)o(h)h(emplo)o(ys)g(a)g(classi\014ed)h(cipher)h
  1103. (algorithm)c(and)j(tamp)q(er-resistan)o(t)g(hardw)o(are,)g(attempt)f(to)h
  1104. (mak)o(e)114 1168 y(it)f(infeasible)f(to)h(deplo)o(y)g(the)h(system)f
  1105. (without)g(transmitting)f(the)i(LEAF.)f(W)m(e)g(ev)n(aluated)g(the)h
  1106. (publicly)114 1218 y(released)f(asp)q(ects)g(of)f(the)g(EES)g(proto)q(cols)g
  1107. (as)g(w)o(ell)f(as)h(a)g(protot)o(yp)q(e)g(v)o(ersion)g(of)g(a)f
  1108. (PCMCIA-based)i(EES)114 1268 y(device.)i(This)11 b(pap)q(er)h(outlines)f(v)n
  1109. (arious)g(tec)o(hniques)i(that)e(enable)h(cryptographic)g(comm)o(uni)o
  1110. (cation)c(among)114 1318 y(EES)14 b(pro)q(cessors)i(without)d(transmission)g
  1111. (of)g(the)h(v)n(alid)e(LEAF.)i(W)m(e)f(iden)o(tify)g(t)o(w)o(o)g(classes)i
  1112. (of)e(tec)o(hniques.)114 1368 y(The)k(simplest)g(allo)o(w)f(comm)o(unicati)o
  1113. (on)f(only)h(b)q(et)o(w)o(een)j(pairs)e(of)g(\\rogue")g(parties.)30
  1114. b(The)17 b(second,)i(more)114 1418 y(complex)10 b(metho)q(ds)i(p)q(ermit)f(a)
  1115. h(rogue)g(application)f(to)h(in)o(terop)q(erate)h(with)f(legal)f(EES)i
  1116. (users.)19 b(W)m(e)12 b(conclude)114 1467 y(with)e(tec)o(hniques)j(that)e
  1117. (could)g(mak)o(e)f(the)i(\014elded)f(EES)h(arc)o(hitecture)h(more)d(robust)i
  1118. (against)f(these)h(failures.)0 1611 y Fj(1)69 b(In)n(tro)r(duction)23
  1119. b(and)h(Bac)n(kground)0 1712 y Fi(In)15 b(April)g(1993,)e(the)h(Clin)o(ton)h
  1120. (Administration)g(announced)h(a)d(prop)q(osed)i(new)f(federal)h(standard)f
  1121. (symmetric-)0 1768 y(k)o(ey)g(encryption)h(system)f(for)f(the)i(protection)f
  1122. (of)f(sensitiv)o(e-but-unclassi)q(\014ed)k(go)o(v)o(ernmen)o(t)d(and)g
  1123. (civilian)j(data)0 1825 y([Mar93)n(].)i(The)13 b(prop)q(osal,)h(called)h(the)
  1124. e(Escro)o(w)o(ed)f(Encryption)i(Standard)f(\(EES\))g([NIST94],)f(includes)k
  1125. (sev)o(eral)0 1881 y(un)o(usual)c(features)f(that)g(ha)o(v)o(e)f(b)q(een)j
  1126. (the)e(sub)s(ject)g(of)g(considerable)i(debate)e(and)h(con)o(tro)o(v)o(ersy)l
  1127. (.)17 b(The)11 b(EES)h(cipher)0 1938 y(algorithm,)j(called)i(\\Skip)s(jac)o
  1128. (k",)d(is)i(itself)g(classi\014ed,)g(and)g(implemen)o(tations)g(of)f(the)g
  1129. (cipher)i(are)e(a)o(v)m(ailable)i(to)0 1994 y(the)c(priv)m(ate)h(sector)e
  1130. (only)i(within)g(tamp)q(er-resistan)o(t)e(mo)q(dules)j(supplied)g(b)o(y)e(go)
  1131. o(v)o(ernmen)o(t-appro)o(v)o(ed)e(v)o(endors.)0 2051 y(Soft)o(w)o(are)f
  1132. (implemen)o(tations)i(of)f(the)h(cipher)h(will)g(not)e(b)q(e)h(p)q(ossible.)
  1133. 20 b(Although)12 b(Skip)s(jac)o(k,)g(whic)o(h)g(w)o(as)f(designed)0
  1134. 2107 y(b)o(y)j(the)h(US)g(National)g(Securit)o(y)g(Agency)g(\(NSA\),)e(w)o
  1135. (as)h(review)o(ed)h(b)o(y)g(a)f(small)h(panel)g(of)f(civilian)j(exp)q(erts)e
  1136. (who)0 2164 y(w)o(ere)21 b(gran)o(ted)g(access)g(to)g(the)g(algorithm,)h(the)
  1137. g(cipher)g(cannot)f(b)q(e)h(sub)s(jected)g(to)f(the)g(degree)g(of)g(civilian)
  1138. 0 2220 y(scrutin)o(y)16 b(ordinarily)g(giv)o(en)g(to)e(new)i(encryption)g
  1139. (systems.)90 2277 y(By)21 b(far)f(the)h(most)f(con)o(tro)o(v)o(ersial)h(asp)q
  1140. (ect)g(of)f(the)h(EES)g(system,)h(ho)o(w)o(ev)o(er,)f(is)g
  1141. Fh(key)h(escr)n(ow.)37 b Fi(As)21 b(part)0 2333 y(of)e(the)h(crypto-sync)o
  1142. (hronization)g(pro)q(cess,)g(EES)g(devices)h(generate)e(and)h(exc)o(hange)f
  1143. (a)g(\\La)o(w)g(Enforcemen)o(t)p 0 2373 780 2 v 51 2399 a Fg(\003)69
  1144. 2415 y Ff(Some)13 b(of)g(the)g(results)h(in)f(this)h(pap)q(er)g(are)f(based)g
  1145. (on)g(exp)q(erimen)o(ts)i(conducted)f(with)f(pre-release)h(protot)o(yp)q(e)g
  1146. (EES)g(PCMCIA)0 2461 y(cards)19 b(and)g(soft)o(w)o(are)e(obtained)j(from)e
  1147. (NSA.)g(The)g(pro)q(duction)i(v)o(ersion)g(of)e(the)g(EES)h(PCMCIA)e(system)i
  1148. (will)g(lik)o(ely)i(exhibit)0 2507 y(di\013eren)o(t)e(p)q(erformance)f(c)o
  1149. (haracteristics)h(and)f(ha)o(v)o(e)g(a)f(di\013eren)o(t)i(in)o(terface)f
  1150. (from)f(the)g(v)o(ersion)i(w)o(e)e(examined.)31 b(The)17 b(reader)h(is)0
  1151. 2552 y(cautioned)e(to)f(view)f(an)o(y)h(exp)q(erimen)o(tal)i(results)e
  1152. (presen)o(ted)h(here)e(as)h(a)f(\\pro)q(of)h(of)f(concept")h(and)g(not)g(as)f
  1153. (represen)o(tativ)o(e)j(of)d(the)0 2598 y(exact)f(p)q(erformance)h(of)f(the)g
  1154. (\014nal)h(system.)964 2743 y Fi(1)p eop
  1155. %%Page: 2 2
  1156. 1 bop 0 50 a Fi(Access)20 b(Field")h(\(LEAF\).)e(This)i(\014eld)g(con)o
  1157. (tains)f(a)g(cop)o(y)f(of)h(the)g(curren)o(t)g(session)g(k)o(ey)g(and)g(is)g
  1158. (in)o(tended)i(to)0 107 y(enable)c(a)e(go)o(v)o(ernmen)o(t)g(ea)o(v)o
  1159. (esdropp)q(er)h(to)f(reco)o(v)o(er)g(the)h(cleartext.)25 b(The)17
  1160. b(LEAF)g(cop)o(y)f(of)h(the)f(session)i(k)o(ey)e(is)0 163 y(encrypted)h(with)
  1161. g(a)f(device-unique)k(k)o(ey)c(called)i(the)f(\\unit)g(k)o(ey",)f(assigned)h
  1162. (at)f(the)h(time)f(the)h(EES)g(device)g(is)0 220 y(man)o(ufactured.)28
  1163. b(Copies)19 b(of)f(the)g(unit)h(k)o(eys)e(for)h(all)h(EES)f(devices)h(are)f
  1164. (to)g(b)q(e)g(held)i(in)f(\\escro)o(w")d(join)o(tly)j(b)o(y)0
  1165. 276 y(t)o(w)o(o)14 b(federal)h(agencies)h(that)f(will)h(b)q(e)g(c)o(harged)f
  1166. (with)g(releasing)h(the)g(k)o(eys)e(to)h(la)o(w)g(enforcemen)o(t)g(under)h
  1167. (certain)0 332 y(conditions.)90 389 y(A)o(t)f(presen)o(t,)g(t)o(w)o(o)g(EES)g
  1168. (devices)i(are)e(b)q(eing)i(pro)q(duced.)22 b(The)16 b(simplest,)g(the)g
  1169. (Clipp)q(er)h(c)o(hip)g(\(also)e(kno)o(wn)0 445 y(as)k(the)h(MYK-78\),)f(is)h
  1170. (essen)o(tially)h(a)e(drop-in)h(replacemen)o(t)h(for)d(a)i(con)o(v)o(en)o
  1171. (tional)f(DES)h([NBS77)o(])f(c)o(hip)i(and)0 502 y(relies)g(on)e(k)o(ey)h
  1172. (negotiation)f(b)q(eing)i(handled)g(o\013)e(the)g(c)o(hip.)34
  1173. b(The)20 b(other)f(EES)h(device,)h(the)f(Capstone)f(c)o(hip)0
  1174. 558 y(\(MYK-80\),)e(adds)g(built-in)j(supp)q(ort)e(for)f(public-k)o(ey)j
  1175. (negotiation)d(and)h(digital)h(signatures,)f(with)f(mo)q(dular)0
  1176. 615 y(arithmetic)f(functions,)f(random)g(n)o(um)o(b)q(er)h(generation,)f(and)
  1177. g(other)g(suc)o(h)g(features.)90 671 y(The)k(in)o(terface)g(to)f(the)h(Skip)s
  1178. (jac)o(k)g(cipher)i(is)e(similar)h(to)e(that)g(of)h(DES,)f(based)h(on)g(a)g
  1179. (64)f(bit)h(co)q(deb)q(o)q(ok)0 728 y(blo)q(c)o(k)g(cipher)g(and)f(supp)q
  1180. (orting)g(FIPS-81)g([NBS80])f(standard)g(mo)q(des)h(of)g(op)q(eration.)28
  1181. b(Keys)18 b(are)g(80)f(bits)h(in)0 784 y(length,)e(as)e(opp)q(osed)i(to)f
  1182. (DES's)f(56)h(bits.)90 841 y(The)h(initial)j(application)e(of)f(EES)g(is)h
  1183. (in)g(stand-alone)f(v)o(oice)h(encryption)g(telephone)g(units,)g(suc)o(h)f
  1184. (as)g(the)0 897 y(A)l(T&T)10 b(Mo)q(del)h(3600)e(T)l(elephone)j(Securit)o(y)f
  1185. (Device.)19 b(T)l(o)10 b(facilitate)h(computer)f(applications)i(suc)o(h)f(as)
  1186. e(electronic)0 953 y(mail)k(and)f(\014le)h(encryption,)g(a)e(v)o(ersion)h(of)
  1187. g(the)g(Capstone)f(c)o(hip)i(will)g(also)f(b)q(e)h(a)o(v)m(ailable)g(pac)o(k)
  1188. m(aged)f(in)h(a)e(standard)0 1010 y(PCMCIA)j(card.)19 b(EES)14
  1189. b(PCMCIA)f(cards)h(can)g(b)q(e)g(installed)i(easily)f(in)g(man)o(y)e
  1190. (commercially)i(a)o(v)m(ailable)h(laptop)0 1066 y(computers,)c(and)f
  1191. (SCSI-based)i(PCMCIA)e(card)g(readers)g(can)h(connect)g(EES)f(cards)g(to)g
  1192. (most)f(other)h(computers.)0 1123 y(The)k(go)o(v)o(ernmen)o(t)f(has)h(sp)q
  1193. (eci\014ed)j(a)c(standard)h(application)i(in)o(terface)e(library)h(for)f
  1194. (comm)o(unicating)g(with)h(the)0 1179 y(cards.)90 1236 y(Clipp)q(er)j(and)e
  1195. (Capstone)f(c)o(hips)i(are,)e(at)g(presen)o(t,)h(a)o(v)m(ailable)i(only)e
  1196. (for)f(use)h(in)h(appro)o(v)o(ed)f(pro)q(ducts)g(that)0 1292
  1197. y(comply)c(with)f(LEAF)g(handling)i(requiremen)o(ts.)19 b(EES)12
  1198. b(PCMCIA)g(cards,)g(on)g(the)g(other)g(hand,)h(are)e(themselv)o(es)0
  1199. 1349 y(a)j(stand-alone)h(pro)q(duct,)g(and)g(are)f(to)g(b)q(e)h(made)g
  1200. (generally)h(a)o(v)m(ailable)g(\\o\013)e(the)g(shelf)t(")h(in)h(the)e(United)
  1201. i(States.)90 1405 y(The)21 b(go)o(v)o(ernmen)o(t)f(has)h(stated)g(that)f(the)
  1202. h(goal)g(of)f(the)i(EES)f(is)g(to)g(mak)o(e)f(a)h(strong)f(cipher)i(a)o(v)m
  1203. (ailable)0 1462 y(for)15 b(legitimate)i(use)g(without)f(supplying)i
  1204. (criminals)g(and)e(other)g(adv)o(ersaries)g(with)g(a)g(to)q(ol)g(that)f(can)i
  1205. (b)q(e)f(used)0 1518 y(against)h(American)h(in)o(terests)f(or)g(to)g(hide)i
  1206. (illegal)g(activities)g(from)d(la)o(w)h(enforcemen)o(t.)27
  1207. b(Th)o(us)17 b(the)h(system)e(is)0 1574 y(in)o(tended)21 b(to)e(b)q(e)h
  1208. (di\016cult)i(to)d(deplo)o(y)h(without)g(also)f(sending)i(a)f(v)m(alid)h
  1209. (LEAF)f(and)g(thereb)o(y)f(exp)q(osing)i(the)0 1631 y(tra\016c)f(to)g(the)g
  1210. (p)q(ossibilit)o(y)j(of)d(go)o(v)o(ernmen)o(t)g(monitoring.)36
  1211. b(In)22 b(this)f(pap)q(er,)h(ho)o(w)o(ev)o(er,)e(w)o(e)h(sho)o(w)f(that)g(it)
  1212. g(is)0 1687 y(p)q(ossible)d(to)d(construct)h(applications)i(that)d(can)h
  1213. (enjo)o(y)g(use)g(of)g(the)g(Skip)s(jac)o(k)g(cipher)i(but)e(that)f(do)h(not)
  1214. g(admit)0 1744 y(la)o(w)f(enforcemen)o(t)h(access)f(through)g(the)h(LEAF.)f
  1215. (F)l(or)g(the)g(purp)q(oses)h(of)f(this)h(pap)q(er,)g(w)o(e)f(consider)h(t)o
  1216. (w)o(o)e(classes)0 1800 y(of)g(\\rogue")f(EES)h(applications:)21
  1217. b(those)12 b(that)h(can)g(comm)o(unicate)h(only)f(with)h(other)e(rogue)h
  1218. (systems)g(and)g(those)0 1857 y(that)h(can)g(successfully)i(in)o(terop)q
  1219. (erate)e(with)h(EES)f(\\legal")h(systems)e(as)h(w)o(ell.)21
  1220. b(The)14 b(latter)g(category)f(esp)q(ecially)0 1913 y(threatens)21
  1221. b(the)h(goals)f(of)h(the)f(EES)h(program,)g(since)h(suc)o(h)f(rogue)f
  1222. (applications)i(w)o(ould)f(b)q(e)h(op)q(erationally)0 1970
  1223. y(equiv)m(alen)o(t)17 b(to)d(their)i(legal)g(coun)o(terparts)f(without)g(b)q
  1224. (eing)h(sub)s(ject)f(to)g(go)o(v)o(ernmen)o(t)f(access.)0 2091
  1225. y Fm(1.1)56 b(LEAF)18 b(Structure)g(and)h(Proto)r(cols)0 2177
  1226. y Fi(The)13 b(LEAF)f(is)i(a)e(128)f(bit)j(structure)e(con)o(taining)h(enough)
  1227. g(information)g(for)f(la)o(w)g(enforcemen)o(t)h(reco)o(v)o(ery)f(of)g(the)0
  1228. 2234 y(session)k(k)o(ey)e(with)i(the)f(co)q(op)q(eration)g(of)g(the)g(t)o(w)o
  1229. (o)f(agencies)i(holding)g(the)f(unit)h(k)o(ey)f(database.)k(The)c(structure)0
  1230. 2290 y(con)o(tains)i(a)f(32)g(bit)h(unique)h(unit)g(iden)o(ti\014er)g(\(the)e
  1231. (serial)i(n)o(um)o(b)q(er)f(of)f(the)h(c)o(hip)g(that)f(generated)h(the)g
  1232. (LEAF\),)0 2347 y(the)d(curren)o(t)g(80)f(bit)i(session)f(k)o(ey)g
  1233. (\(encrypted)h(with)f(the)g(device's)h(unit)g(k)o(ey\))e(and)h(a)g(16)f(bit)i
  1234. (LEAF)f(c)o(hec)o(ksum.)0 2403 y(The)k(en)o(tire)h(structure)e(is)i
  1235. (encrypted)f(with)h(a)e(\014xed)i(\\family)f(k)o(ey")g(to)f(pro)q(duce)i(the)
  1236. f(\014nal)h(LEAF)f(message.)0 2459 y(The)e(family)h(k)o(ey)f(is)h(shared)f(b)
  1237. o(y)g(all)h(in)o(terop)q(erable)g(EES)f(devices.)24 b(The)17
  1238. b(family)g(k)o(ey)l(,)f(the)g(encryption)h(mo)q(des)0 2516
  1239. y(used)d(to)f(encrypt)g(the)h(unit)g(k)o(ey)f(and)g(the)h(LEAF)f(message,)g
  1240. (and)g(the)h(details)g(of)f(the)g(c)o(hec)o(ksum)h(are)f(all)h(secret.)0
  1241. 2572 y(Externally)l(,)i(the)f(LEAF)g(is)h(an)f(opaque)h(128)e(bit)i(pac)o(k)m
  1242. (age.)j(See)d(Figure)g(1.)964 2743 y(2)p eop
  1243. %%Page: 3 3
  1244. 2 bop 373 1350 a @beginspecial 0 @llx 0 @lly 289 @urx 310 @ury
  1245. 2890 @rwi @setspecial
  1246. %%BeginDocument: ./leaf1.eps
  1247. %!PS-Adobe-2.0 EPSF-2.0
  1248. %%Title: stdin
  1249. %%Creator: fig2dev
  1250. %%CreationDate: Sun May 29 13:20:11 1994
  1251. %%For: mab@ground.cs.columbia.edu (Matt Blaze)
  1252. %%BoundingBox: 0 0 289 310
  1253. %%Pages: 0
  1254. %%EndComments
  1255. /$F2psDict 200 dict def 
  1256. $F2psDict begin
  1257. $F2psDict /mtrx matrix put
  1258. /l {lineto} bind def
  1259. /m {moveto} bind def
  1260. /s {stroke} bind def
  1261. /n {newpath} bind def
  1262. /gs {gsave} bind def
  1263. /gr {grestore} bind def
  1264. /clp {closepath} bind def
  1265. /graycol {dup dup currentrgbcolor 4 -2 roll mul 4 -2 roll mul
  1266. 4 -2 roll mul setrgbcolor} bind def
  1267. /col-1 {} def
  1268. /col0 {0 0 0 setrgbcolor} bind def
  1269. /col1 {0 0 1 setrgbcolor} bind def
  1270. /col2 {0 1 0 setrgbcolor} bind def
  1271. /col3 {0 1 1 setrgbcolor} bind def
  1272. /col4 {1 0 0 setrgbcolor} bind def
  1273. /col5 {1 0 1 setrgbcolor} bind def
  1274. /col6 {1 1 0 setrgbcolor} bind def
  1275. /col7 {1 1 1 setrgbcolor} bind def
  1276.     end
  1277. /$F2psBegin {$F2psDict begin /$F2psEnteredState save def} def
  1278. /$F2psEnd {$F2psEnteredState restore end} def
  1279. %%EndProlog
  1280.  
  1281. $F2psBegin
  1282. 0 setlinecap 0 setlinejoin
  1283. -36.0 324.0 translate 0.900 -0.900 scale
  1284. 1.000 setlinewidth
  1285. % Polyline
  1286. n 139 139 m 199 184 l gs col-1 s gr
  1287. n 188.600 171.200 m 199.000 184.000 l 183.800 177.600 l gs 2 setlinejoin col-1 s gr
  1288. n 199 204 m 199 204 l gs col-1 s gr
  1289. % Polyline
  1290. n 199 204 m 199 239 l gs col-1 s gr
  1291. n 203.000 223.000 m 199.000 239.000 l 195.000 223.000 l gs 2 setlinejoin col-1 s gr
  1292. n 194 294 m 194 294 l gs col-1 s gr
  1293. % Polyline
  1294. n 199 294 m 199 339 l gs col-1 s gr
  1295. n 203.000 323.000 m 199.000 339.000 l 195.000 323.000 l gs 2 setlinejoin col-1 s gr
  1296. % Polyline
  1297. n 139 49 m 139 84 l gs col-1 s gr
  1298. n 143.000 68.000 m 139.000 84.000 l 135.000 68.000 l gs 2 setlinejoin col-1 s gr
  1299. 0.500 setlinewidth
  1300. % Polyline
  1301. n 359 359 m 359 339 l  39 339 l  39 359 l  clp gs col-1 s gr
  1302. % Polyline
  1303. n 119 204 m 119 184 l  39 184 l  39 204 l  clp gs col-1 s gr
  1304. % Polyline
  1305. n 319 204 m 319 184 l  119 184 l  119 204 l  clp gs col-1 s gr
  1306. % Polyline
  1307. n 239 49 m 239 29 l  39 29 l  39 49 l  clp gs col-1 s gr
  1308. % Polyline
  1309. n 359 204 m 359 184 l  319 184 l  319 204 l  clp gs col-1 s gr
  1310. % Polyline
  1311. n 151 239 m 144 239 144 287 7 arcto 4 {pop} repeat 144 294 247 294 7 arcto 4 {pop} repeat 254 294 254 246 7 arcto 4 {pop} repeat 254 239 151 239 7 arcto 4 {pop} repeat clp gs col-1 s gr
  1312. % Polyline
  1313. n 91 84 m 84 84 84 132 7 arcto 4 {pop} repeat 84 139 187 139 7 arcto 4 {pop} repeat 194 139 194 91 7 arcto 4 {pop} repeat 194 84 91 84 7 arcto 4 {pop} repeat clp gs col-1 s gr
  1314. % Polyline
  1315. n 231 84 m 224 84 224 132 7 arcto 4 {pop} repeat 224 139 322 139 7 arcto 4 {pop} repeat 329 139 329 91 7 arcto 4 {pop} repeat 329 84 231 84 7 arcto 4 {pop} repeat clp gs col-1 s gr
  1316. 1.000 setlinewidth
  1317. % Polyline
  1318. n 184 49 m 259 84 l gs col-1 s gr
  1319. n 246.193 73.609 m 259.000 84.000 l 242.810 80.859 l gs 2 setlinejoin col-1 s gr
  1320. % Polyline
  1321. n 274 139 m 324 184 l gs col-1 s gr
  1322. n 314.783 170.323 m 324.000 184.000 l 309.431 176.270 l gs 2 setlinejoin col-1 s gr
  1323. % Polyline
  1324. n 299 54 m 279 84 l gs col-1 s gr
  1325. n 291.203 72.906 m 279.000 84.000 l 284.547 68.468 l gs 2 setlinejoin col-1 s gr
  1326. /Times-Roman findfont 12.00 scalefont setfont
  1327. 74 199 m 
  1328. gs 1 -1 scale (Unit ID) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1329. /Times-Roman findfont 12.00 scalefont setfont
  1330. 219 199 m 
  1331. gs 1 -1 scale (Encrypted Session Key) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1332. /Times-Roman findfont 12.00 scalefont setfont
  1333. 339 199 m 
  1334. gs 1 -1 scale (chksum) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1335. /Times-Roman findfont 12.00 scalefont setfont
  1336. 134 44 m 
  1337. gs 1 -1 scale (Session key) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1338. /Times-Roman findfont 12.00 scalefont setfont
  1339. 134 24 m 
  1340. gs 1 -1 scale (80 bits) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1341. /Times-Roman findfont 12.00 scalefont setfont
  1342. 74 179 m 
  1343. gs 1 -1 scale (32 bits) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1344. /Times-Roman findfont 12.00 scalefont setfont
  1345. 219 179 m 
  1346. gs 1 -1 scale (80 bits) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1347. /Times-Roman findfont 12.00 scalefont setfont
  1348. 229 334 m 
  1349. gs 1 -1 scale (128 bits) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1350. /Times-Roman findfont 12.00 scalefont setfont
  1351. 139 124 m 
  1352. gs 1 -1 scale (\(unit key\)) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1353. /Times-Roman findfont 12.00 scalefont setfont
  1354. 199 279 m 
  1355. gs 1 -1 scale (\(global family key\)) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1356. /Times-Roman findfont 12.00 scalefont setfont
  1357. 139 104 m 
  1358. gs 1 -1 scale (Skipjack encrypt) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1359. /Times-Roman findfont 12.00 scalefont setfont
  1360. 199 259 m 
  1361. gs 1 -1 scale (Skipjack encrypt) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1362. /Times-Roman findfont 12.00 scalefont setfont
  1363. 309 49 m 
  1364. gs 1 -1 scale (IV & other variables) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1365. /Times-Roman findfont 12.00 scalefont setfont
  1366. 344 179 m 
  1367. gs 1 -1 scale (16 bits) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1368. /Times-Roman findfont 12.00 scalefont setfont
  1369. 194 354 m 
  1370. gs 1 -1 scale (LEAF) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1371. /Times-Roman findfont 12.00 scalefont setfont
  1372. 279 104 m 
  1373. gs 1 -1 scale (16 bit checksum) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1374. /Times-Roman findfont 12.00 scalefont setfont
  1375. 279 122 m 
  1376. gs 1 -1 scale (function) dup stringwidth pop 2 div neg 0 rmoveto  col-1 show gr
  1377. $F2psEnd
  1378. %%EndDocument
  1379.  @endspecial 713 1498 a Fi(Figure)15 b(1:)20 b(LEAF)15 b(Structure)90
  1380. 1631 y(T)l(o)d(decrypt)h(EES)f(tra\016c,)g(a)g(la)o(w)h(enforcemen)o(t)f
  1381. (agency)h(\014rst)f(m)o(ust)g(in)o(tercept)h(the)f(LEAF)h(and)f(the)h
  1382. (tra\016c)0 1688 y(itself)h(using)h(con)o(v)o(en)o(tional)e(data)g
  1383. (wiretapping)i(tec)o(hnology)l(.)k(The)14 b(LEAF)f(is)h(decrypted)h(with)f
  1384. (the)f(family)h(k)o(ey)l(,)0 1744 y(rev)o(ealing)h(the)f(c)o(hip)g(serial)h
  1385. (n)o(um)o(b)q(er,)f(the)g(unit)h(k)o(ey-encrypted)f(session)h(k)o(ey)e(and)h
  1386. (the)g(LEAF)g(c)o(hec)o(ksum.)20 b(The)0 1801 y(c)o(hip)d(serial)g(n)o(um)o
  1387. (b)q(er)f(is)h(pro)o(vided,)f(with)h(appropriate)f(authorization,)g(to)f(the)
  1388. h(t)o(w)o(o)f(escro)o(w)g(agencies,)i(whic)o(h)0 1857 y(eac)o(h)12
  1389. b(return)g(half)g(of)g(the)g(unit)h(k)o(ey)e(for)h(the)g(giv)o(en)g(serial)h
  1390. (n)o(um)o(b)q(er.)19 b(The)12 b(t)o(w)o(o)f(half-unit)i(k)o(eys)f(can)g(b)q
  1391. (e)h(com)o(bined)0 1914 y(\(b)o(y)j(bit)o(wise)g(exclusiv)o(e-or\))h(to)f
  1392. (pro)q(duce)h(the)f(unit)h(k)o(ey)l(,)e(whic)o(h)i(the)f(la)o(w)g(enforcemen)
  1393. o(t)g(agency)g(can)g(then)h(use)0 1970 y(to)e(decrypt)g(the)g(session)h(k)o
  1394. (ey)l(.)k(This)c(session)g(k)o(ey)f(can)g(then)h(b)q(e)f(used)h(to)f(decrypt)
  1395. g(the)h(actual)f(tra\016c.)90 2026 y(The)h(wiretapping)h(system)e(th)o(us)h
  1396. (relies)h(on)f(the)f(a)o(v)m(ailabilit)o(y)j(of)e(the)g(LEAF)f(along)h(with)g
  1397. (the)g(encrypted)0 2083 y(tra\016c.)j(T)l(o)14 b(force)h(applications)h(to)e
  1398. (send)h(the)g(LEAF)f(with)h(the)g(tra\016c,)f(EES)g(devices)i(will)g(not)f
  1399. (decrypt)g(data)0 2139 y(un)o(til)21 b(they)f(ha)o(v)o(e)f(receiv)o(ed)i(a)f
  1400. (v)m(alid)h(LEAF)f(for)g(the)g(curren)o(t)f(session)i(k)o(ey)l(.)34
  1401. b(Presumably)l(,)21 b(the)f(decrypting)0 2196 y(device)d(decrypts)e(the)g
  1402. (LEAF)h(with)f(the)g(family)h(k)o(ey)f(and)h(v)o(eri\014es)g(the)f(c)o(hec)o
  1403. (ksum.)90 2252 y(T)l(o)j(pro)o(vide)h(a)g(con)o(v)o(enien)o(t)g(application)h
  1404. (in)o(terface)f(for)f(LEAF)g(managemen)o(t,)h(EES)f(devices)i(generate)0
  1405. 2309 y(and)d(load)g(LEAFs)g(along)f(with)i(the)e(FIPS-81)h(initialization)j
  1406. (v)o(ector)c(\(IV\).)g(\\Generate)g(IV")h(and)g(\\load)g(IV")0
  1407. 2365 y(functions)f(op)q(erate)f(on)g(192)f(bit)i(\014elds)h(con)o(taining)f
  1408. (a)e(64)h(bit)h(IV)f(and)h(the)f(128)f(bit)i(LEAF.)90 2422
  1409. y(Because)d(the)f(details)g(of)g(the)g(LEAF,)f(b)q(ey)o(ond)i(the)f(list)h
  1410. (of)e(its)h(elemen)o(ts,)h(are)e(classi\014ed)j(and)e(are)g(pac)o(k)m(aged)0
  1411. 2478 y(in)h(an)f(opaque)g(encrypted)h(structure,)f(w)o(e)g(can)g(only)h(sp)q
  1412. (eculate)g(as)f(to)f(ho)o(w)h(the)g(receiving)i(c)o(hip)f(guards)e(against)0
  1413. 2535 y(damaged)g(LEAFs.)19 b(All)13 b(bits)g(in)f(generated)g(LEAFs)g(c)o
  1414. (hange)f(when)i(the)f(IV)g(or)f(session)h(k)o(ey)g(c)o(hanges,)g(ho)o(w)o(ev)
  1415. o(er,)0 2591 y(suggesting)22 b(that)f(the)h(c)o(hec)o(ksum)g(is)g(a)f
  1416. (function)i(of)e(the)h(curren)o(t)g(session)g(k)o(ey)g(and)g(IV.)g(By)g(v)m
  1417. (arying)g(the)964 2743 y(3)p eop
  1418. %%Page: 4 4
  1419. 3 bop 0 50 a Fi(c)o(hec)o(ksum)17 b(in)h(this)g(w)o(a)o(y)l(,)f(EES)g
  1420. (devices)h(guard)f(against)g(the)g(replacemen)o(t)h(of)f(the)g(curren)o(t)g
  1421. (LEAF)g(with)h(one)0 107 y(generated)d(from)f(another)h(session)h(k)o(ey)f
  1422. (\(whic)o(h)g(w)o(ould)h(b)q(e)g(useless)g(for)e(decryption)i(of)f(the)g
  1423. (curren)o(t)g(session\).)0 250 y Fj(2)69 b(Non-in)n(terop)r(erable)22
  1424. b(Rogue)h(Applications)0 351 y Fi(First,)14 b(consider)h(the)g(problem)g(of)f
  1425. (constructing)h(a)f(set)g(of)g(applications)j(that)c(use)i(Skip)s(jac)o(k)g
  1426. (to)f(comm)o(unicate)0 408 y(among)20 b(themselv)o(es)h(without)g(k)o(ey)g
  1427. (escro)o(w.)36 b(W)l(e)21 b(are)f(free)h(to)f(use)h(an)o(y)g(metho)q(d)g(p)q
  1428. (ermitted)g(b)o(y)g(the)g(EES)0 464 y(pro)q(cessor)13 b(in)o(terface)h
  1429. (without)f(regard)g(for)g(standard)g(usage.)19 b(Since)c(suc)o(h)e
  1430. (applications)i(ma)o(y)e(b)q(e)h(restricted)g(to)0 521 y(comm)o(unicating)i
  1431. (with)g(other)f(rogue)g(systems,)g(their)g(general)h(utilit)o(y)h(is)f
  1432. (somewhat)e(limited,)j(although)f(they)0 577 y(still)h(violate)e(the)h(in)o
  1433. (ten)o(t)f(of)g(the)g(EES.)90 634 y(Sev)o(eral)f(approac)o(hes)g(can)f
  1434. (easily)i(circum)o(v)o(en)o(t)f(the)g(la)o(w)f(enforcemen)o(t)h(access)g(mec)
  1435. o(hanism,)g(with)g(a)f(range)0 690 y(of)i(practicalit)o(y)h(and)f
  1436. (tradeo\013s.)0 812 y Fm(2.1)56 b(LEAF)18 b(Obscuring)0 898
  1437. y Fi(The)13 b(simplest)h(approac)o(h)e(is)h(to)f(tak)o(e)h(steps)f(to)g
  1438. (ensure)i(that)e(the)g(ea)o(v)o(esdropp)q(er)h(cannot)g(reco)o(v)o(er)f(the)h
  1439. (LEAF)f(or)0 954 y(the)k(encrypted)h(tra\016c.)22 b(One)17
  1440. b(option)f(is)h(pre-)f(or)g(p)q(ost-)g(encryption)h(of)e(the)i(tra\016c)e
  1441. (with)h(another)g(cipher.)24 b(It)0 1011 y(is)14 b(not)g(clear,)g(ho)o(w)o
  1442. (ev)o(er,)f(what)g(the)h(attac)o(k)o(er)f(gains)h(from)f(doing)h(this,)g
  1443. (since)h(if)g(the)f(second)g(cipher)h(is)g(b)q(eliev)o(ed)0
  1444. 1067 y(strong)j(there)i(is)g(no)f(need)h(to)f(use)g(Skip)s(jac)o(k)h(in)g
  1445. (the)f(\014rst)g(place,)i(and)f(if)f(it)h(is)g(b)q(eliev)o(ed)h(w)o(eak)e(it)
  1446. h(do)q(es)f(not)0 1123 y(protect)c(the)g(tra\016c)f(from)h(the)g(go)o(v)o
  1447. (ernmen)o(t)f(an)o(yw)o(a)o(y)l(.)90 1180 y(A)h(re\014nemen)o(t)f(on)h(this)g
  1448. (approac)o(h)f(encrypts)h(only)g(the)f(LEAF.)g(A)h(LEAF)g(encryption)g(sc)o
  1449. (heme)g(could)g(b)q(e)0 1236 y(in)o(tegrated)j(in)o(to)g(a)f(k)o(ey)h(exc)o
  1450. (hange)g(proto)q(col)g(that)f(pro)q(duces)i(\\extra")e(shared)h(secret)g
  1451. (bits)g(\(suc)o(h)g(as)f(Di\016e-)0 1293 y(Hellman)j([DH76)o(]\).)30
  1452. b(Since)21 b(only)e(80)g(bits)g(are)g(required)h(for)e(the)h(Skip)s(jac)o(k)g
  1453. (session)g(k)o(ey)l(,)h(128)e(of)g(the)h(other)0 1349 y(bits)g(could)h(b)q(e)
  1454. f(used)h(as)e(a)g(V)l(ernam)h(cipher)h(against)e(the)h(LEAF.)g(Note)f(that)g
  1455. (this)h(sc)o(heme)g(is)g(not)g(directly)0 1406 y(implemen)o(table)c(with)e
  1456. (the)g(EES)f(PCMCIA)h(card)f(k)o(ey)h(exc)o(hange)g(proto)q(col,)f(whic)o(h)i
  1457. (do)q(es)f(not)f(p)q(ermit)i(external)0 1462 y(access)20 b(to)g(the)g
  1458. (negotiated)h(k)o(ey)f(bits.)36 b(Ho)o(w)o(ev)o(er,)20 b(an)g(additional)i(k)
  1459. o(ey)e(exc)o(hange)g(could)i(b)q(e)f(p)q(erformed)f(in)0 1519
  1460. y(soft)o(w)o(are)13 b(on)j(the)f(host)g(pro)q(cessors.)90 1575
  1461. y(Another)i(option)g(is)g(to)f(negotiate)h(k)o(eys)f(\(and)h(LEAFs\))g
  1462. (out-of-band)f(or)h(in)g(adv)m(ance.)26 b(While)18 b(it)f(is)g(not)0
  1463. 1632 y(clear)12 b(that)f(there)h(is)g(an)o(y)g(w)o(a)o(y)f(EES)g(could)i
  1464. (prev)o(en)o(t)f(suc)o(h)g(an)f(attac)o(k,)g(neither)i(is)f(suc)o(h)g(a)g(sc)
  1465. o(heme)g(v)o(ery)f(useful)i(in)0 1688 y(practical)h(applications.)21
  1466. b(Users)14 b(w)o(ould)f(nev)o(er)h(b)q(e)g(able)h(to)d(comm)o(unicate)i
  1467. (securely)h(without)e(pre-negotiation)0 1744 y(or)i(the)g(use)h(of)e(a)h
  1468. (trusted)g(c)o(hannel.)21 b(If)16 b(a)f(trusted)g(c)o(hannel)h(existed,)g(it)
  1469. f(could)i(b)q(e)e(just)g(as)g(easily)h(used)g(for)f(the)0 1801
  1470. y(tra\016c)e(itself.)21 b(F)l(or)13 b(some)h(applications,)h(ho)o(w)o(ev)o
  1471. (er,)e(suc)o(h)i(as)e(bulk)i(\014le)h(encryption,)e(pre-negotiated)h(k)o(eys)
  1472. f(ma)o(y)0 1857 y(b)q(e)i(practical.)0 1979 y Fm(2.2)56 b(LEAF)18
  1473. b(F)-5 b(eedbac)n(k)0 2065 y Fi(Another)19 b(p)q(ossible)i(approac)o(h)e(is)g
  1474. (to)g(a)o(v)o(oid)f(sending)j(the)e(LEAF)g(altogether.)31 b(Dep)q(ending)21
  1475. b(on)e(the)g(crypto-)0 2121 y(graphic)e(mo)q(de)f(this)g(can)g(b)q(e)h
  1476. (surprisingly)h(simple.)23 b(Recall)18 b(that)d(LEAFs)h(are)g(generated)g
  1477. (and)g(loaded)h(along)0 2178 y(with)g(the)g(IV.)g(While)h(applications)h
  1478. (cannot)d(easily)i(force)f(the)g(c)o(hip)h(to)e(use)h(an)g(externally-c)o
  1479. (hosen)h(IV,)f(they)0 2234 y(can)i(easily)i(generate)e(a)f(new)i(one.)32
  1480. b(Up)q(on)20 b(negotiation)f(of)g(a)g(session)g(k)o(ey)l(,)h(the)g(receiving)
  1481. g(side)h(of)d(a)h(rogue)0 2291 y(application)c(can)f(simply)h(generate)f(a)f
  1482. (new)h(IV/LEAF)g(and)g(feed)g(it)g(bac)o(k)f(to)g(itself,)i(the)f(sender)g
  1483. (nev)o(er)g(ha)o(ving)0 2347 y(sen)o(t)h(the)g(IV/LEAF)g(at)g(all.)21
  1484. b(This)15 b(still)i(lea)o(v)o(es)e(the)g(problem)h(of)f(IV)g(sync)o
  1485. (hronization.)21 b(Because)16 b(IVs)f(cannot)0 2404 y(b)q(e)e(loaded)g
  1486. (without)f(a)g(LEAF)g(and)g(LEAF)h(c)o(hec)o(ksums)f(app)q(ear)g(to)g(b)q(e)h
  1487. (b)q(ound)g(to)f(the)g(IV,)g(sender)h(and)f(receiv)o(er)0 2460
  1488. y(ha)o(v)o(e)h(no)g(w)o(a)o(y)g(to)g(comm)o(unicate)g(a)g(directly)i
  1489. (loadable)g(IV)f(without)f(also)g(comm)o(unicating)h(the)g(corresp)q(onding)0
  1490. 2517 y(LEAF.)i(Most)f(cryptographic)i(mo)q(des)g(require)g(the)f(sender)h
  1491. (and)g(receiv)o(er)g(to)f(sync)o(hronize)h(on)f(the)h(IV.)f(This)0
  1492. 2573 y(is)g(not)f(an)h(insurmoun)o(table)g(problem,)g(ho)o(w)o(ev)o(er.)k(It)
  1493. c(is)g(p)q(ossible)h(to)e(comp)q(ose)g(e\016cien)o(t)i(implemen)o(tations)f
  1494. (of)964 2743 y(4)p eop
  1495. %%Page: 5 5
  1496. 4 bop 0 50 a Fi(eac)o(h)16 b(FIPS-81)f(cryptographic)h(mo)q(de)g(in)h(terms)e
  1497. (of)g(other)g(mo)q(des)h(without)g(explicitly)i(loading)f(the)f(sender's)0
  1498. 107 y(IV)k(at)g(the)g(decrypting)h(side.)35 b(Let)20 b(us)g(consider)h
  1499. (\\LEAF)f(feedbac)o(k")g(sc)o(hemes)h(for)e(eac)o(h)h(commonly)g(used)0
  1500. 163 y(cipher)c(mo)q(de.)0 283 y Fe(2.2.1)52 b(Electronic)19
  1501. b(Co)q(de)f(Bo)q(ok)g(\(ECB\))0 369 y Fi(In)h(ECB)e(mo)q(de,)i(there)f(is)h
  1502. (no)e(IV)i(\(or,)e(more)h(prop)q(erly)l(,)h(the)f(IV)h(do)q(es)f(not)g
  1503. (a\013ect)f(the)h(cipher)h(in)g(an)o(y)f(w)o(a)o(y\).)0 425
  1504. y(The)c(primitiv)o(e)i(blo)q(c)o(k)f(cipher)g(is)g(used)f(directly)l(,)i
  1505. (without)e(c)o(haining)h(or)f(feedbac)o(k)h(from)e(other)h(blo)q(c)o(ks.)20
  1506. b(LEAF)0 482 y(feedbac)o(k)f(is)g(therefore)f(simple)i({)e(eac)o(h)g(side)h
  1507. (generates)f(an)h(IV/LEAF)f(immediately)i(after)e(the)g(k)o(ey)h(is)f(ne-)0
  1508. 538 y(gotiated)f(and)h(loaded,)h(and)f(uses)g(ECB)g(mo)q(de)g(for)f(comm)o
  1509. (unication.)29 b(The)18 b(fact)f(that)g(sender)h(and)g(receiv)o(er)0
  1510. 595 y(generated)d(di\013eren)o(t)h(IVs)f(do)q(es)h(not)f(matter.)90
  1511. 651 y(ECB)d(mo)q(de)g(is)h(itself)g(vulnerable)h(to)e(a)f(n)o(um)o(b)q(er)i
  1512. (of)f(w)o(ell-kno)o(wn)h(attac)o(ks)d(and)j(is)f(not)g(considered)i(suitable)
  1513. 0 708 y(for)h(general)g(use.)0 828 y Fe(2.2.2)52 b(Cipher)17
  1514. b(Blo)q(c)o(k)h(Chaining)h(\(CBC\))0 914 y Fi(In)14 b(CBC)f(mo)q(de)g
  1515. (encryption,)h(the)f(cleartext)g(of)g(eac)o(h)g(blo)q(c)o(k)h(is)f(\014rst)g
  1516. (exclusiv)o(e-ORd)j(\(X)o(OR\))d(with)g(the)h(cipher-)0 970
  1517. y(text)j(of)h(the)g(previous)h(blo)q(c)o(k)f(and)h(then)f(encrypted)h(with)f
  1518. (the)g(blo)q(c)o(k)h(cipher)g(function.)29 b(The)18 b(\014rst)g(blo)q(c)o(k)g
  1519. (is)0 1026 y(X)o(ORd)d(against)f(the)g(IV.)g(Decryption)h(rev)o(erses)f(the)g
  1520. (pro)q(cess.)20 b(Since)c(successful)f(decryption)g(of)f(the)g(previous)0
  1521. 1083 y(blo)q(c)o(k)21 b(dep)q(ends)h(only)f(on)f(receiving)i(the)e(previous)h
  1522. (blo)q(c)o(k's)f(ciphertext,)i(loss)f(of)f(the)g(IV)h(only)f(a\013ects)g(the)
  1523. 0 1139 y(\014rst)g(blo)q(c)o(k.)35 b(LEAF)20 b(feedbac)o(k,)h(therefore,)f
  1524. (causes)h(the)f(\014rst)f(blo)q(c)o(k)i(to)e(b)q(e)i(corrupted)f(but)g(can)g
  1525. (b)q(e)h(easily)0 1196 y(comp)q(ensated)16 b(for)e(b)o(y)h(pre\014xing)h(one)
  1526. f(\\dumm)o(y")g(blo)q(c)o(k)g(to)g(the)g(message,)f(to)h(b)q(e)g(discarded)i
  1527. (b)o(y)d(the)i(receiv)o(er.)0 1316 y Fe(2.2.3)52 b(Output)18
  1528. b(F)l(eed)f(Bac)o(k)g(\(OFB\))0 1402 y Fi(OFB)d(mo)q(de)f(uses)h(the)g
  1529. (result)g(of)f(successiv)o(e)h(encryption)h(through)e(a)g(shift)h(register)f
  1530. (\(initialized)j(with)e(the)g(IV\))0 1458 y(as)g(a)g(k)o(eystream)g
  1531. (generator.)19 b(The)c(blo)q(c)o(k)g(encryption)h(function)f(is)g(used)g(to)f
  1532. (generate)g(b)q(oth)h(the)g(encrypt)g(and)0 1515 y(decrypt)i(streams.)22
  1533. b(Note)15 b(that)h(the)g(en)o(tire)h(stream)e(dep)q(ends)j(on)e(the)g(IV)h
  1534. (and)f(therefore)g(requires)h(that)f(eac)o(h)0 1571 y(side)g(b)q(e)g(able)g
  1535. (to)f(load)g(the)g(same)g(IV)h(to)e(reco)o(v)o(er)h(the)g(same)g(streams.)k
  1536. (LEAF)c(feedbac)o(k)h(requires)g(sim)o(ulating)0 1628 y(OFB)i(mo)q(de)g
  1537. (using)g(the)g(ECB)f(blo)q(c)o(k)h(encrypt)g(function)h(and)e(externally)i
  1538. (implemen)o(ting)g(the)f(shift)g(register)0 1684 y(and)h(stream)g(mixer)h
  1539. (\(a)e(simple)j(bit)o(wise)f(X)o(OR)g(function\).)33 b(The)19
  1540. b(IV)h(m)o(ust)f(b)q(e)h(sen)o(t)f(\(without)g(the)g(LEAF\))0
  1541. 1740 y(to)e(initialize)k(the)d(external)g(shift)g(register.)27
  1542. b(Exp)q(erimen)o(ts)18 b(with)g(this)h(attac)o(k)d(with)i(a)f(protot)o(yp)q
  1543. (e)g(EES)h(card)0 1797 y(suggest)f(that)f(this)i(attac)o(k)e(carries)i(a)f
  1544. (signi\014can)o(t)h(bandwidth)h(p)q(enalt)o(y)l(,)f(ho)o(w)o(ev)o(er,)f
  1545. (since)h(eac)o(h)g(ECB)f(call)i(to)0 1853 y(the)c(card)g(tak)o(es)g(ab)q(out)
  1546. g(50ms)f(and)i(a)f(separate)f(call)j(is)e(required)i(for)d(eac)o(h)h(64)g
  1547. (bit)h(blo)q(c)o(k)g(of)e(the)i(stream.)90 1910 y(A)f(more)g(e\016cien)o(t)i
  1548. (metho)q(d)e(exists)h(to)f(generate)g(an)g(OFB)h(stream,)e(ho)o(w)o(ev)o(er,)
  1549. h(using)h(Cipher)g(F)l(eed)g(Bac)o(k)0 1966 y(mo)q(de)g(to)f(sim)o(ulate)h
  1550. (the)f(stream)g(generator)f(for)h(large)h(blo)q(c)o(ks.)21
  1551. b(The)16 b(sender)g(generates)f(an)g(IV)h(and)g(encrypts)0
  1552. 2023 y(with)e(OFB)h(mo)q(de)f(directly)h(and)f(in)h(the)f(standard)g(manner.)
  1553. 20 b(Tw)o(o)13 b(passes)h(are)f(required)i(on)f(the)g(receiv)o(e)h(side.)0
  1554. 2079 y(First,)i(generate)f(an)h(IV)g(and)g(encrypt)g(a)g(blo)q(c)o(k)g(of)g
  1555. (all)g(zeros)g(with)g(CFB)g(mo)q(de.)25 b(No)o(w)16 b(w)o(e)g(can)h(recreate)
  1556. g(the)0 2136 y(OFB)h(stream)f(mask)h(for)f Fd(n)i Fi(blo)q(c)o(ks)g(b)o(y)f
  1557. (CFB)f(encrypting)i Fd(n)g Fi(blo)q(c)o(ks)f(of)g(zeros)g(pre\014xed)h(with)f
  1558. (the)g(blo)q(c)o(k)h(w)o(e)0 2192 y(created)13 b(in)i(the)e(previous)h(step)g
  1559. (X)o(ORd)g(with)g(the)f(real)h(IV.)g(The)f(subsequen)o(t)i(blo)q(c)o(ks,)f
  1560. (after)e(CFB)h(encryption,)0 2249 y(can)i(b)q(e)h(X)o(ORd)g(with)g(the)f
  1561. (ciphertext)h(\(shifted)g(b)o(y)f(one)g(blo)q(c)o(k\))h(to)e(reco)o(v)o(er)h
  1562. (the)g(cleartext.)0 2369 y Fe(2.2.4)52 b(Cipher)17 b(F)l(eed)g(Bac)o(k)g
  1563. (\(CFB\))0 2454 y Fi(CFB)d(mo)q(de)h(is)h(similar)g(to)e(OFB)h(mo)q(de)g
  1564. (with)g(the)g(shift)g(register)g(fed)g(from)f(the)h(previous)g(blo)q(c)o(k's)
  1565. g(ciphertext)0 2511 y(after)e(it)g(has)g(b)q(een)i(X)o(OR)f(mixed)g(with)g
  1566. (the)f(cleartext.)19 b(It)14 b(can)f(b)q(e)h(implemen)o(ted)h(externally)g
  1567. (with)e(ECB)h(mo)q(de)0 2567 y(using)i(the)f(same)g(tec)o(hniques)i(as)d(for)
  1568. h(OFB,)g(with)h(similar)g(p)q(erformance)f(p)q(enalties.)964
  1569. 2743 y(5)p eop
  1570. %%Page: 6 6
  1571. 5 bop 90 50 a Fi(A)18 b(more)f(e\016cien)o(t)i(implemen)o(tation)g(tak)o(es)e
  1572. (adv)m(an)o(tage)g(of)h(CFB's)f(limited)i(error)f(propagation.)27
  1573. b(If)18 b(the)0 107 y(sender)13 b(pre\014xes)g(a)f(\\dumm)o(y")g(blo)q(c)o(k)
  1574. h(to)f(the)g(ciphertext)i(input)f(stream)f(the)g(receiv)o(er)h(can)g(feed)g
  1575. (bac)o(k)f(a)g(freshly)0 163 y(generated,)j(random)g(IV)g(and)h(emplo)o(y)f
  1576. (a)g(bulk)h(CFB)f(blo)q(c)o(k)h(decrypt)g(directly)g(\(just)f(as)g(with)g
  1577. (CBC)g(mo)q(de\).)0 306 y Fj(3)69 b(In)n(terop)r(erable)22
  1578. b(Rogue)h(Applications)0 408 y Fi(A)12 b(more)g(in)o(teresting)g(\(and)g
  1579. (useful\))h(class)f(of)g(rogue)f(applications)j(includes)g(those)e(that)f
  1580. (can)i(in)o(terop)q(erate)f(with)0 464 y(\\legal")18 b(p)q(eers)g(\(those)e
  1581. (that)h(mak)o(e)g(no)g(e\013ort)f(to)h(circum)o(v)o(en)o(t)g(the)h(escro)o(w)
  1582. e(system\),)h(still)i(without)e(allo)o(wing)0 521 y(la)o(w)22
  1583. b(enforcemen)o(t)g(access.)40 b(Suc)o(h)23 b(applications)g(ha)o(v)o(e)f(m)o
  1584. (uc)o(h)g(greater)f(utilit)o(y)i(\(and)f(are)f(a)h(m)o(uc)o(h)g(greater)0
  1585. 577 y(threat)16 b(to)g(the)h(escro)o(w)e(system\))h(than)h(non-in)o(terop)q
  1586. (erable)h(rogues,)e(b)q(ecause)i(they)e(ha)o(v)o(e)h(all)g(the)g(b)q
  1587. (ene\014ts)g(of)0 634 y(in)o(terop)q(erabilit)o(y)g(with)e(other)g(EES)h
  1588. (devices)g(without)f(the)h(risk)f(of)g(exp)q(osure)h(to)e(wiretapping.)90
  1589. 690 y(In)k(the)f(previous)h(section,)g(w)o(e)f(discussed)i(tec)o(hniques)g
  1590. (for)d(rogue)h(applications)i(to)e(comm)o(unicate)h(with)0
  1591. 747 y(one)11 b(another)g(without)g(sending)h(the)f(LEAF.)g(Suc)o(h)h
  1592. (applications)g(could)h(b)q(e)e(mo)q(di\014ed)i(to)d(adapt)h(their)g(b)q(eha)
  1593. o(vior)0 803 y(to)17 b(send)i(the)f(LEAF)g(only)g(when)g(comm)o(unicating)h
  1594. (with)f(a)g(legal)g(p)q(eer.)29 b(A)18 b(simple)h(w)o(a)o(y)e(to)g(construct)
  1595. h(suc)o(h)0 859 y(an)g(application)i(is)f(to)e(\\test)g(the)i(w)o(ater")e(b)o
  1596. (y)h(sending)h(the)f(p)q(eer)h(device)h(a)e(b)q(ogus)g(LEAF)g(and)g(then,)h
  1597. (if)g(the)0 916 y(exc)o(hange)e(fails)g(\(b)q(ecause)g(the)g(p)q(eer)g(is)g
  1598. (op)q(erating)g(legally\),)h(sending)g(a)e(v)m(alid)i(LEAF.)e(Suc)o(h)i(a)e
  1599. (\\t)o(w)o(o)f(phase")0 972 y(proto)q(col)f(is)g(not)g(completely)h
  1600. (satisfactory)l(,)e(ho)o(w)o(ev)o(er,)g(b)q(ecause)i(it)g(still)g(renders)f
  1601. (tra\016c)g(vulnerable)i(to)d(LEAF)0 1029 y(monitoring)f(when)g(comm)o
  1602. (unicating)g(with)g(legal)g(applications.)20 b(F)l(urthermore,)11
  1603. b(suc)o(h)h(a)f(proto)q(col)h(cannot)f(w)o(ork)0 1085 y(with)16
  1604. b(non-in)o(teractiv)o(e)g(applications)g(suc)o(h)g(as)f(electronic)h(mail,)g
  1605. (\014le)g(encryption,)g(fax,)e(etc.)90 1142 y(A)k(more)f(general)h(approac)o
  1606. (h)g(is)g(to)f(construct)h(a)f(LEAF)h(\014eld)h(that)e(will)i(b)q(e)g
  1607. (accepted)f(as)g(v)m(alid)h(b)o(y)f(the)0 1198 y(receiv)o(er)e(but)f(that)g
  1608. (do)q(es)g(not)g(actually)h(con)o(tain)f(the)h(encrypted)g(session)f(k)o(ey)l
  1609. (.)0 1320 y Fm(3.1)56 b(Brute-F)-5 b(orce)17 b(LEAF)i(Searc)n(h)0
  1610. 1406 y Fi(Recall)g(that)e(the)h(LEAF)f(structure)h(con)o(tains)f(three)h
  1611. (comp)q(onen)o(ts:)25 b(the)17 b(unit)h(serial)h(n)o(um)o(b)q(er)f(of)f(the)g
  1612. (trans-)0 1462 y(mitter,)f(the)g(unit)h(k)o(ey-encrypted)g(session)f(k)o(ey)l
  1613. (,)g(and)h(a)f(16)f(bit)i(c)o(hec)o(ksum,)f(all)h(encrypted)g(as)f(a)f(blo)q
  1614. (c)o(k)i(under)0 1519 y(the)e(family)i(k)o(ey)l(.)j(Because)c(the)g
  1615. (receiving)h(c)o(hip)f(kno)o(ws)f(only)h(the)f(session)h(k)o(ey)l(,)f(the)h
  1616. (IV,)f(and)h(the)f(family)h(k)o(ey)l(,)0 1575 y(but)e(not)g(the)g(other)g(c)o
  1617. (hip's)g(unit)h(k)o(ey)f(or)f(serial)i(n)o(um)o(b)q(er,)f(LEAF)g(v)o
  1618. (eri\014cation)h(m)o(ust)f(b)q(e)g(en)o(tirely)h(on)f(the)h(basis)0
  1619. 1632 y(of)k(the)h(16)e(bit)i(c)o(hec)o(ksum.)34 b(The)19 b(c)o(hec)o(ksum,)i
  1620. (whic)o(h)f(is)g(presumably)g(based)g(only)g(on)g(the)f(session)h(k)o(ey)l(,)
  1621. g(IV)0 1688 y(and)f(other)e(LEAF)i(data,)f(cannot)g(b)q(e)h(extracted)f(from)
  1622. g(or)f(inserted)j(in)o(to)e(a)g(LEAF)g(without)h(kno)o(wledge)f(of)0
  1623. 1744 y(the)f(family)h(k)o(ey)g(\(and)f(the)g(encryption)h(mo)q(de\).)27
  1624. b(It)17 b(is)h(therefore)f(not)g(p)q(ossible)i(for)e(a)g(rogue)g(application)
  1625. i(to)0 1801 y(extract)e(the)g(c)o(hec)o(ksum)h(from)f(a)g(v)m(alid)i(LEAF)e
  1626. (and)h(re-insert)g(in)o(to)g(an)f(in)o(v)m(alid)j(LEAF,)d(or)g(to)f(damage)h
  1627. (only)0 1857 y(the)e(encrypted)h(session)g(k)o(ey)f(in)h(an)f(otherwise-v)m
  1628. (alid)i(LEAF.)90 1914 y(A)c(rogue)g(sender)h(could)g(simply)g(use)g(a)e
  1629. (di\013eren)o(t)i(session)f(k)o(ey)g(when)h(generating)f(the)h(LEAF;)e(this)i
  1630. (LEAF)0 1970 y(w)o(ould)g(app)q(ear)g(in)o(ternally)h(consisten)o(t)f(with)g
  1631. (a)g(v)m(alid)h(c)o(hec)o(ksum)f(but)g(w)o(ould)g(con)o(tain)g(the)g(wrong)f
  1632. (session)h(k)o(ey)l(.)0 2027 y(\\Old")21 b(LEAFs)f(can)g(b)q(e)g(easily)i
  1633. (detected)e(and)g(rejected)h(b)o(y)f(the)g(receiving)h(c)o(hip,)h(ho)o(w)o
  1634. (ev)o(er,)e(b)o(y)g(using)h(the)0 2083 y(cleartext)15 b(of)f(the)g(session)h
  1635. (k)o(ey)g(\(rather)e(than)i(the)f(unit-k)o(ey)i(encrypted)f(session)g(k)o
  1636. (ey\))f(in)h(the)g(computation)f(of)0 2140 y(the)h(LEAF)h(c)o(hec)o(ksum.)90
  1637. 2196 y(Since)k(the)f(c)o(hec)o(ksum)g(is)g(only)g(16)g(bits)g(in)g(length,)h
  1638. (ho)o(w)o(ev)o(er,)e(another)h(attac)o(k)e(is)i(p)q(ossible.)1742
  1639. 2180 y Fc(1)1794 2196 y Fi(F)l(or)f(an)o(y)0 2253 y(session)c(k)o(ey)f(and)h
  1640. (IV,)f(2)414 2236 y Fc(112)482 2253 y Fi(of)g(the)g(2)631 2236
  1641. y Fc(128)699 2253 y Fi(p)q(ossible)i(LEAF)f(structures)f(will)i(app)q(ear)e
  1642. (to)g(ha)o(v)o(e)g(a)g(v)m(alid)i(c)o(hec)o(ksum.)0 2309 y(Because)k(the)f
  1643. (pro)q(cess)g(of)g(decrypting)h(a)e(randomly)h(generated)g(LEAF)h(with)f(the)
  1644. g(family)h(k)o(ey)f(will)h(tend)g(to)0 2365 y(randomize)h(the)f(decrypted)h
  1645. (bits)f(in)h(the)g(c)o(hec)o(ksum)f(\014eld,)i(an)o(y)e(randomly)g(generated)
  1646. g(128)g(bit)g(string)g(will)0 2422 y(ha)o(v)o(e)d(a)h(1)p Fd(=)p
  1647. Fi(2)215 2405 y Fc(16)268 2422 y Fi(c)o(hance)g(of)g(app)q(earing)g(v)m(alid)
  1648. h(for)f(the)f(curren)o(t)h(session)g(k)o(ey)g(and)g(IV.)g(Note)f(that)g(the)h
  1649. (sending)0 2478 y(c)o(hip,)22 b(lik)o(e)f(the)g(receiving)g(c)o(hip,)h(has)e
  1650. (a)g(built-in)j(LEAF-testing)d(facilit)o(y)l(.)36 b(Once)21
  1651. b(a)f(session)h(k)o(ey)f(has)g(b)q(een)p 0 2518 780 2 v 52
  1652. 2545 a Fb(1)69 2561 y Ff(The)14 b(\014rst)g(observ)n(ation)h(that)f(LEAF)g(c)
  1653. o(hec)o(ksums)h(ma)o(y)f(b)q(e)g(vulnerable)i(to)e(brute-force)g(sp)q(o)q
  1654. (o\014ng)h(app)q(ears)g(ha)o(v)o(e)f(b)q(een)h(inde-)0 2606
  1655. y(p)q(enden)o(tly)g(made)f(b)o(y)f(Ken)g(Sherri\013)i(in)e(a)g(p)q(osting)i
  1656. (to)e(the)g(\\sci.crypt")h(Usenet)g(group)g(on)f(Jan)o(uary)h(27,)f(1994.)964
  1657. 2743 y Fi(6)p eop
  1658. %%Page: 7 7
  1659. 6 bop 0 50 a Fi(negotiated,)14 b(an)f(attac)o(k)o(er)f(can)i(use)g(the)g(lo)q
  1660. (cal)h(EES)f(device)h(to)e(\014nd)h(a)g(v)m(alid-lo)q(oking-but-i)q(n)o(v)m
  1661. (ali)q(d)j(LEAF)d(with)0 107 y(an)h(exp)q(ected)i(a)o(v)o(erage)d(of)g(2)490
  1662. 90 y Fc(16)543 107 y Fi(trials.)20 b(This)c(attac)o(k)d(app)q(ears)j(to)e(b)q
  1663. (e)i(feasible)h(in)f(practice.)90 163 y(Suc)o(h)k(a)e(randomly)i(generated)f
  1664. (LEAF)g(structure)g(will)h(b)q(e)g(accepted)g(as)e(v)m(alid)j(b)o(y)e(the)g
  1665. (receiving)i(c)o(hip)0 220 y(and)13 b(will)i(enable)f(EES)f(comm)o
  1666. (unication.)20 b(The)13 b(tra\016c)f(will)j(not)d(b)q(e)i(sub)s(ject)e(to)h
  1667. (LEAF-based)g(wiretap)g(access,)0 276 y(ho)o(w)o(ev)o(er.)22
  1668. b(When)17 b(the)f(wiretapp)q(er)h(decrypts)g(the)f(rogue)g(LEAF)g(with)h(the)
  1669. f(family)h(k)o(ey)l(,)g(the)f(c)o(hec)o(ksum)h(\014eld)0 332
  1670. y(will)h(app)q(ear)e(v)m(alid)h(but)f(the)g(unit)h(iden)o(ti\014er)g(and)f
  1671. (encrypted)h(session)f(k)o(ey)g(\014elds)h(will)h(con)o(tain)e(only)g(random)
  1672. 0 389 y(bit)g(strings.)0 511 y Fm(3.2)56 b(Exp)r(erim)o(en)n(tal)16
  1673. b(Results)0 596 y Fi(W)l(e)c(measured)g(the)f(time)h(to)f(test)h(randomly)f
  1674. (selected)i(LEAFs)f(on)g(an)f(EES)h(PCMCIA)f(card.)19 b(All)13
  1675. b(exp)q(erimen)o(ts)0 653 y(w)o(ere)f(conducted)i(with)f(a)f(Myk)o(otronx)f
  1676. (protot)o(yp)q(e)h(EES)h(card)f(connected)i(through)e(a)g(Sp)o(yrus)h(SCSI)g
  1677. (PCMCIA)0 709 y(reader)i(to)f(a)h(Sun)h(Sparc-10)f(host)f(running)i(SunOS)h
  1678. (4.1.3.)h(W)l(e)d(made)g(no)g(e\013ort)f(to)g(optimize)i(the)f(comm)o(uni-)0
  1679. 766 y(cation)h(with)g(the)g(card)g(or)g(library)l(,)g(using)h(the)f(standard)
  1680. g(protot)o(yp)q(e)f(PCMCIA)g(library)i(and)f(device)i(driv)o(ers)0
  1681. 822 y(as)c(deliv)o(ered.)21 b(Recall)16 b(that)d(the)h(EES)g(PCMCIA)g(in)o
  1682. (terface)g(is)g(fairly)h(lo)q(osely-coupled)h(to)e(the)g(host)f(pro)q(cessor)
  1683. 0 879 y(and)18 b(supp)q(orts)g(a)g(more)g(restricted)g(set)g(of)g
  1684. (cryptographic)g(op)q(erations)g(than)g(the)g(basic)h(Clipp)q(er/Capstone)0
  1685. 935 y(c)o(hips)d(themselv)o(es.)22 b(Therefore,)15 b(LEAF-testing)g(op)q
  1686. (erations)h(on)f(the)h(PCMCIA)f(card)g(are)g(inheren)o(tly)i(slo)o(w)o(er)0
  1687. 992 y(than)e(the)g(same)g(op)q(erations)h(on)f(a)g(more)f(tigh)o(tly-coupled)
  1688. j(EES)f(device)g(or)f(on)g(a)g(sp)q(ecial-purp)q(ose)j(host)d(with)0
  1689. 1048 y(a)g(built-in)i(EES)f(pro)q(cessor.)j(It)d(is)f(also)g(p)q(ossible)i
  1690. (that)e(comm)o(unication)h(with)f(the)g(card)g(can)h(b)q(e)g(made)f(faster)0
  1691. 1105 y(with)h(the)f(more)g(tigh)o(tly-coupled)i(PCMCIA)f(in)o(terfaces)f
  1692. (found)h(on)f(most)g(laptop)g(computers.)21 b(The)15 b(comm)o(u-)0
  1693. 1161 y(nication)g(time)g(with)g(the)f(card)g(in)o(terface)h(dominates)f(the)h
  1694. (cost)e(of)h(most)g(op)q(erations)g(in)h(the)g(en)o(vironmen)o(t)f(w)o(e)0
  1695. 1217 y(examined;)h(host)f(pro)q(cessor)g(sp)q(eed)h(w)o(as)f(not)f(a)h
  1696. (signi\014can)o(t)i(determining)f(factor.)k(W)l(e)14 b(assume)g(our)g
  1697. (results)h(to)0 1274 y(b)q(e)h(appro)o(ximately)f(represen)o(tativ)o(e)g(of)g
  1698. (t)o(ypical)h(implemen)o(tations)h(in)f(a)f(w)o(orst-case)f(en)o(vironmen)o
  1699. (t.)90 1330 y(Our)22 b(test)f(application)i(required)g(ab)q(out)e(38ms)g(to)f
  1700. (generate)i(\(with)f(a)g(pseudorandom)h(generator\))e(a)0 1387
  1701. y(LEAF-size)d(bit)f(string,)g(send)h(it)f(through)f(the)h(PCMCIA)g(library)h
  1702. (to)e(the)h(EES)g(card)g(and)g(c)o(hec)o(k)g(the)g(result.)0
  1703. 1443 y(Since,)f(on)g(a)o(v)o(erage,)d(2)390 1427 y Fc(15)442
  1704. 1443 y Fi(random)h(LEAFs)i(m)o(ust)e(b)q(e)i(generated)f(and)h(tested)f(b)q
  1705. (efore)g(one)g(with)h(a)f(v)m(alid)i(c)o(hec)o(k-)0 1500 y(sum)f(is)g(found,)
  1706. g(a)f(rogue)h(PCMCIA)f(application)i(can)f(searc)o(h)g(for)f(a)g(v)m(alid-lo)
  1707. q(oking)k(LEAF)c(in)i(38)9 b Fa(\003)g Fi(2)1775 1483 y Fc(16)1826
  1708. 1500 y Fi(ms,)14 b(or)0 1556 y(2,490,368)e(ms,)j(whic)o(h)h(is)g(ab)q(out)f
  1709. (42)f(min)o(utes.)90 1613 y(42)h(min)o(utes)h(ob)o(viously)g(adds)f(to)q(o)g
  1710. (m)o(uc)o(h)g(latency)h(to)f(the)g(setup)h(time)g(for)e(real-time)j
  1711. (applications)g(suc)o(h)0 1669 y(as)f(secure)h(telephone)h(calls.)24
  1712. b(F)l(or)16 b(less)h(in)o(teractiv)o(e)g(applications,)h(particularly)g
  1713. (secure)f(electronic)h(mail)f(and)0 1726 y(encrypted)c(\014le)g(storage)e
  1714. (systems,)h(suc)o(h)h(a)f(dela)o(y)h(ma)o(y)e(b)q(e)i(acceptable.)20
  1715. b(F)l(urthermore,)12 b(the)g(attac)o(k)f(has)h(almost)0 1782
  1716. y(linear)18 b(sp)q(eedup)g(with)e(parallel)i(pro)q(cessing.)25
  1717. b(With)17 b(60)f(PCMCIA)g(cards,)g(a)g(v)m(alid-lo)q(oking)j(LEAF)e(could)g
  1718. (b)q(e)0 1838 y(exp)q(ected)i(in)g(under)f(45)f(seconds.)29
  1719. b(Also,)18 b(it)g(ma)o(y)f(b)q(e)i(reasonable)f(to)f(exp)q(ect)i(sev)o(eral)f
  1720. (orders)f(of)g(magnitude)0 1895 y(reduction)h(in)f(searc)o(h)g(time)g(with)g
  1721. (more)f(direct)i(use)f(of)f(a)g(Capstone)h(or)f(Clipp)q(er)i(c)o(hip.)26
  1722. b(Since)18 b(those)f(devices)0 1951 y(are)k(not)f(exp)q(ected)i(to)f(b)q(e)g
  1723. (made)g(a)o(v)m(ailable)i(for)d(unrestricted)i(use)f(outside)h(em)o(b)q
  1724. (edded)g(pro)q(ducts)g(\(as)e(the)0 2008 y(PCMCIA)h(cards)f(are\),)i(ho)o(w)o
  1725. (ev)o(er,)f(it)g(is)h(lik)o(ely)g(that)e(practical)i(implemen)o(tations)g(of)
  1726. f(this)g(attac)o(k)f(will)i(b)q(e)0 2064 y(limited)17 b(to)e(applications)h
  1727. (that)f(use)g(the)h(PCMCIA)f(in)o(terface.)90 2121 y(W)l(e)h(implemen)o(ted)h
  1728. (this)f(attac)o(k)f(for)g(a)g(simple)i(encrypted)g(\014le)g(storage)d
  1729. (application)j(that)e(w)o(e)h(built)h(as)e(a)0 2177 y(testb)q(ed.)26
  1730. b(Other)17 b(than)g(the)h(30-50)e(min)o(utes)h(of)g(latency)h(added)g(b)o(y)f
  1731. (the)g(LEAF)g(searc)o(h)g(at)g(encryption)h(time)0 2234 y(\(whic)o(h)d(is)g
  1732. (p)q(erformed)f(\\o\017ine")g(from)g(the)g(user)h(in)o(terface\),)f(the)g
  1733. (rogue)g(v)o(ersion)h(is)f(functionally)i(iden)o(tical)h(to)0
  1734. 2290 y(the)e(v)o(ersion)h(that)f(follo)o(ws)g(the)h(appro)o(v)o(ed)f(in)o
  1735. (terface.)20 b(In)c(a)f(storage)g(application)i(the)e(LEAF-searc)o(h)h(dela)o
  1736. (y)f(is)0 2347 y(completely)g(transparen)o(t,)d(since)j(most)d(user)i(op)q
  1737. (eration)f(can)h(pro)q(ceed)g(normally)g(prior)g(to)e(its)i(completion.)20
  1738. b(In)0 2403 y(store-and-forw)o(ard)10 b(messaging)i(applications,)h(suc)o(h)f
  1739. (as)g(electronic)h(mail,)g(ho)o(w)o(ev)o(er,)e(the)g(LEAF)h(searc)o(h)g(dela)
  1740. o(ys)0 2459 y(message)19 b(deliv)o(ery)l(.)34 b(Whether)20
  1741. b(this)f(is)h(acceptable)h(dep)q(ends)g(on)e(the)h(application;)j(additional)
  1742. d(computing)0 2516 y(resources,)e(in)g(the)f(form)g(of)g(EES)g(PCMCIA)g
  1743. (cards)g(\(p)q(erhaps)h(b)q(orro)o(w)o(ed)f(from)f(nearb)o(y)i(idle)h(w)o
  1744. (orkstations\))0 2572 y(can)13 b(reduce)g(the)g(dela)o(y)l(.)20
  1745. b(It)13 b(ma)o(y)f(also)h(b)q(e)g(p)q(ossible)h(for)f(messaging)f
  1746. (applications)j(to)d(precompute)h(session)g(k)o(eys)964 2743
  1747. y(7)p eop
  1748. %%Page: 8 8
  1749. 7 bop 0 50 a Fi(and)18 b(b)q(ogus)g(LEAFs)f(prior)h(to)f(their)i(use,)f(esp)q
  1750. (ecially)i(if)f(the)e(n)o(um)o(b)q(er)h(of)g(p)q(ossible)h(recipien)o(ts)g
  1751. (is)g(small.)28 b(W)l(e)0 107 y(did)16 b(not)f(implemen)o(t)i(an)o(y)d(of)h
  1752. (these)h(con)o(v)o(eniences,)g(ho)o(w)o(ev)o(er.)90 163 y(In)e(in)o(teractiv)
  1753. o(e)f(applications)h(suc)o(h)g(as)e(secure)i(telephon)o(y)l(,)g(the)f(searc)o
  1754. (h)f(time)i(required)g(for)e(LEAF)h(forgery)0 220 y(during)j(call)g(setup)g
  1755. (ma)o(y)e(render)i(the)f(tec)o(hnique)i(impractical.)k(Other)16
  1756. b(than)f(parallel)h(pro)q(cessing)g(with)g(addi-)0 276 y(tional)e(EES)g
  1757. (devices,)h(there)f(do)g(not)f(app)q(ear)h(to)f(b)q(e)i(viable)g(shortcuts)e
  1758. (for)g(reducing)i(this)f(searc)o(h)g(time.)20 b(If)14 b(call)0
  1759. 332 y(setup)j(uses)f(a)g(negotiated)g(k)o(ey)g(exc)o(hange,)h(the)f
  1760. (originator)g(cannot)g(generally)h(predict)h(the)e(session)h(k)o(ey)f(and)0
  1761. 389 y(therefore)e(cannot)h(conduct)g(the)g(LEAF)f(searc)o(h)h(in)g(adv)m
  1762. (ance.)21 b(Neither)15 b(do)g(there)f(app)q(ear)h(to)f(b)q(e)i(shortcuts)e
  1763. (to)0 445 y(testing)f(2)170 429 y Fc(16)221 445 y Fi(LEAF)g(v)m(alues.)21
  1764. b(The)14 b(form)o(ulation)f(of)g(the)g(problem,)i(in)f(whic)o(h)g(the)g
  1765. (attac)o(k)o(er)e(need)i(only)g(disco)o(v)o(er)0 502 y Fh(some)h
  1766. Fi(session)h(k)o(ey)f(and)g(corresp)q(onding)h(LEAF,)f(seems)g(at)g(\014rst)g
  1767. (blush)h(to)f(admit)g(a)g(so-called)h(\\birthda)o(y)f(at-)0
  1768. 558 y(tac)o(k")g(requiring)i(only)416 518 y Fa(p)p 454 518
  1769. 61 2 v 40 x Fi(2)477 545 y Fc(16)528 558 y Fi(=)c(2)599 542
  1770. y Fc(8)635 558 y Fi(trials.)22 b(Ho)o(w)o(ev)o(er,)14 b(b)q(ecause)j(the)f
  1771. (LEAF)f(c)o(hec)o(ksum)i(is)f(cryptographically)0 615 y(protected)k(b)o(y)g
  1772. (the)h(family)g(k)o(ey)l(,)g(there)f(app)q(ears)h(to)e(b)q(e)i(no)g(ob)o
  1773. (vious)f(w)o(a)o(y)f(to)h(p)q(erform)g(the)g(constan)o(t-time)0
  1774. 671 y(lo)q(okup)c(on)f(the)g(c)o(hec)o(ksum)h(required)g(for)f(eac)o(h)g
  1775. (prob)q(e)h(in)g(suc)o(h)f(an)g(attac)o(k.)90 728 y(Because)j(no)g
  1776. (widely-deplo)o(y)o(ed)i(\\o\016cial")e(EES)f(PCMCIA)g(applications)j
  1777. (existed)e(at)f(the)h(time)f(of)h(this)0 784 y(writing,)c(there)f(w)o(ere)h
  1778. (no)f(third-part)o(y)g(supplied)j(systems)d(a)o(v)m(ailable)i(against)e(whic)
  1779. o(h)i(w)o(e)e(could)h(exploit)h(LEAF)0 841 y(forgery)i(tec)o(hniques.)31
  1780. b(W)l(e)18 b(ha)o(v)o(e)g(ev)o(ery)h(reason)f(to)f(b)q(eliev)o(e,)k(ho)o(w)o
  1781. (ev)o(er,)d(that)g(building)j(in)o(terop)q(erable)e(rogue)0
  1782. 897 y(v)o(ersions)e(of)f(an)o(y)h(non-in)o(teractiv)o(e)g(PCMCIA)g
  1783. (application)h(that)e(implemen)o(ts)i(an)f(op)q(en)g(proto)q(col)g(w)o(ould)g
  1784. (b)q(e)0 953 y(a)e(straigh)o(tforw)o(ard)e(matter.)0 1097 y
  1785. Fj(4)69 b(Discussion)0 1198 y Fi(The)21 b(EES)f(failure)i(mo)q(des)e(describ)
  1786. q(ed)i(in)g(this)f(pap)q(er)f(do)h(not)f(ha)o(v)o(e)g(the)g(same)g(seman)o
  1787. (tic)h(implications)h(as)0 1255 y(proto)q(col)13 b(failures)g(in)h(the)e
  1788. (classic)i(sense.)20 b(None)12 b(of)h(the)f(metho)q(ds)h(giv)o(en)g(here)g(p)
  1789. q(ermit)g(an)g(attac)o(k)o(er)e(to)h(disco)o(v)o(er)0 1311
  1790. y(the)20 b(con)o(ten)o(ts)f(of)h(encrypted)g(tra\016c)f(or)h(compromise)g
  1791. (the)g(in)o(tegrit)o(y)g(of)f(signed)i(messages.)33 b(Nothing)21
  1792. b(here)0 1368 y(a\013ects)15 b(the)g(strength)h(of)f(the)g(system)g(from)g
  1793. (the)h(p)q(oin)o(t)g(of)f(view)h(of)g(the)f(comm)o(unicating)i(parties;)e
  1794. (indeed,)i(in)0 1424 y(some)d(sense)g(these)g(tec)o(hniques)h(increase)g(the)
  1795. f(securit)o(y)g(of)f(EES-based)i(proto)q(cols)e(b)o(y)h(eliminating)i(the)e
  1796. (LEAF)0 1480 y(as)h(a)g(source)g(of)g(attac)o(k.)90 1537 y(Instead,)e(these)g
  1797. (metho)q(ds)g(attac)o(k)e(an)i(un)o(usual)h(asp)q(ect)f(of)f(EES)h
  1798. (requiremen)o(ts)g({)f(the)h(attempt)f(to)g(enforce)0 1593
  1799. y(access)j(for)f(a)g(third)h(part)o(y)f(who)g(is)h(not)f(an)h(activ)o(e)g
  1800. (participan)o(t)g(in)g(an)o(y)f(part)g(of)g(EES-based)i(comm)o(unication.)0
  1801. 1650 y(Once)e(the)g(system)e(has)i(b)q(een)g(deplo)o(y)o(ed,)g(there)g(is)f
  1802. (little)i(further)e(that)g(the)g(third)h(part)o(y)e(\(the)h(wiretapp)q(er\))h
  1803. (can)0 1706 y(do)k(to)f(protect)g(its)h(in)o(terests.)27 b(In)18
  1804. b(e\013ect,)g(the)g(wiretapp)q(er)g(activ)o(ely)h(participates)f(in)g(the)g
  1805. (proto)q(col)g(only)g(b)o(y)0 1763 y(pro)o(viding)e(the)g(narro)o(w)e(in)o
  1806. (terface)i(to)f(the)g(tamp)q(er-resistan)o(t)g(EES)h(mo)q(dule)g(that)f
  1807. (requires)h(that)f(a)g(LEAF)g(b)q(e)0 1819 y(loaded)k(prior)f(to)f(executing)
  1808. i(a)e(decrypt)h(op)q(eration.)28 b(Our)18 b(attac)o(ks)f(th)o(w)o(art)f(the)i
  1809. (wiretapp)q(er)g(b)o(y)g(using)h(that)0 1876 y(in)o(terface)c(in)i(unexp)q
  1810. (ected)f(w)o(a)o(ys.)90 1932 y(In)d(considering)h(coun)o(termeasures)e(to)g
  1811. (these)h(attac)o(ks,)e(it)i(is)g(useful)g(to)f(divide)j(the)d(prop)q(erties)h
  1812. (of)f(the)h(EES)0 1989 y(system)i(in)o(to)g(three)g(somewhat)g(o)o(v)o
  1813. (erlapping)g(categories:)68 2082 y Fa(\017)23 b Fi(F)l(undamen)o(tal.)d(This)
  1814. 15 b(category)e(includes)j(the)f(prop)q(erties)g(of)f(an)o(y)g(k)o(ey)g
  1815. (escro)o(w)f(system)h(in)h(a)f(particular)114 2139 y(application)22
  1816. b(domain)g(\(e.g.,)f(widely)h(a)o(v)m(ailable)h(comp)q(onen)o(ts,)f(FIPS-81)f
  1817. (compatibilit)o(y)l(,)j(iden)o(ti\014able)114 2195 y(LEAFs,)15
  1818. b(etc.\).)21 b(These)c(prop)q(erties)f(cannot)g(b)q(e)g(c)o(hanged)g(without)
  1819. g(a\013ecting)g(the)g(applicabilit)o(y)i(of)e(the)114 2252
  1820. y(system.)68 2346 y Fa(\017)23 b Fi(Arc)o(hitectural.)k(The)18
  1821. b(basic)g(prop)q(erties)g(of)f(the)g(system)g(decided)j(up)q(on)e(early)g(in)
  1822. g(the)f(design)i(pro)q(cess)114 2402 y(\(e.g.,)f(the)g(size)i(of)e(the)h
  1823. (LEAF)g(\014eld,)i(the)d(crypto-sync)o(hronization)i(proto)q(col,)f(etc.\).)
  1824. 30 b(Changing)19 b(the)114 2458 y(arc)o(hitecture)c(requires)h
  1825. (re-engineering)h(of)e(a)g(signi\014can)o(t)h(fraction)f(of)g(system)g(comp)q
  1826. (onen)o(ts.)68 2552 y Fa(\017)23 b Fi(Implemen)o(tation.)j(The)17
  1827. b(c)o(haracteristics)h(of)e(the)h(actual)h(EES)f(devices)h(and)f(soft)o(w)o
  1828. (are.)24 b(These)17 b(can)g(b)q(e)114 2609 y(c)o(hanged)e(b)o(y)g(replacing)i
  1829. (or)e(mo)q(difying)h(the)f(comp)q(onen)o(ts)g(in)h(question.)964
  1830. 2743 y(8)p eop
  1831. %%Page: 9 9
  1832. 8 bop 90 50 a Fi(In)20 b(this)f(pap)q(er)h(w)o(e)e(ha)o(v)o(e)h(fo)q(cused)h
  1833. (primarily)g(on)f(w)o(eaknesses)g(that)f(are)h(either)h(fundamen)o(tal)f(or)g
  1834. (that)0 107 y(arise)14 b(from)g(the)g(EES)g(arc)o(hitecture.)20
  1835. b(In)14 b(particular,)h(w)o(e)f(did)h(not)e(attempt)g(to)h(disco)o(v)o(er)g
  1836. (or)f(exploit)j(\\bugs")d(in)0 163 y(the)i(protot)o(yp)q(e)g(EES)g(devices.)
  1837. 90 220 y(It)c(is)g(not)f(clear)h(that)f(it)g(is)h(p)q(ossible)i(to)d
  1838. (construct)g(an)g(EES)h(system)f(that)g(is)h(b)q(oth)g(completely)g(in)o
  1839. (vulnerable)0 276 y(to)17 b(all)i(kinds)g(of)e(exploitation)i(as)e(w)o(ell)i
  1840. (as)e(generally)i(useful.)29 b(Let)18 b(us)f(consider)i(mo)q(di\014cations)g
  1841. (to)e(the)h(EES)0 332 y(in)o(terface)d(that)g(frustrate)f(the)h(v)m(arious)h
  1842. (attac)o(ks.)90 389 y(Non-in)o(terop)q(erable)h(applications)g(are)e
  1843. (particularly)h(hard)f(to)g(prev)o(en)o(t,)g(since)h(they)f(are)g(free)h(to)e
  1844. (use)i(the)0 445 y(EES)h(in)o(terface)h(in)g(an)o(y)f(w)o(a)o(y)f(they)i(c)o
  1845. (ho)q(ose.)26 b(LEAF)18 b(feedbac)o(k)f(tec)o(hniques)i(can)e(b)q(e)h
  1846. (discouraged)g(b)o(y)g(ha)o(ving)0 502 y(devices)f(recognize)g(\(and)f
  1847. (refuse)h(to)e(accept\))h(lo)q(cally-generated)i(LEAFs.)23
  1848. b(This)17 b(w)o(ould)f(mak)o(e)g(it)g(di\016cult)i(to)0 558
  1849. y(deplo)o(y)g(the)g(system)g(in)g(legitimate)h(secure)f(storage)e
  1850. (applications,)k(ho)o(w)o(ev)o(er,)d(and)h(could)h(b)q(e)f(circum)o(v)o(en)o
  1851. (ted)0 615 y(easily)e(b)o(y)e(using)i(t)o(w)o(o)d(devices)j(on)f(the)g
  1852. (receiving)h(end,)f(one)g(for)f(LEAF)h(generation)g(and)f(one)h(for)f
  1853. (decryption.)90 671 y(The)20 b(in)o(terop)q(erable)g(LEAF-searc)o(h)g(metho)q
  1854. (d)f(can)h(b)q(e)g(made)f(less)h(attractiv)o(e)e(b)o(y)i(increasing)g(the)g
  1855. (time)0 728 y(required)i(to)f(c)o(hec)o(k)g(a)g(LEAF.)g(The)g(abilit)o(y)i
  1856. (to)d(do)h(this)h(is)g(limited)h(b)o(y)e(the)g(fact)g(that)f(an)o(y)h
  1857. (reduction)h(in)0 784 y(LEAF-c)o(hec)o(king)d(p)q(erformance)f(also)g
  1858. (degrades)g(the)g(p)q(erformance)g(of)f(legal)i(applications.)29
  1859. b(EES)18 b(PCMCIA)0 841 y(cards,)e(on)f(whic)o(h)i(LEAFs)f(can)g(b)q(e)g
  1860. (feasibly)h(searc)o(hed)g(for,)e(already)h(require)h(appro)o(ximately)f(38)f
  1861. (ms)g(to)h(load)0 897 y(an)h(IV)g(and)g(LEAF.)f(Slo)o(wing)i(this)f(to,)f(sa)
  1862. o(y)l(,)g(t)o(w)o(o)g(seconds,)h(w)o(ould)g(noticeably)h(increase)g(the)e
  1863. (setup)i(time)f(for)0 953 y(legitimate)g(in)o(teractiv)o(e)f(tra\016c)g(but)g
  1864. (only)g(adds)g(a)g(factor)f(of)g(50)h(to)f(the)h(time)h(required)g(b)o(y)f
  1865. (the)g(o\017ine)g(rogue)0 1010 y(LEAF)f(searc)o(her)g(\(who)g(could)h(comp)q
  1866. (ensate)g(with)f(as)g(m)o(uc)o(h)g(parallel)i(pro)q(cessing)f(as)f
  1867. (desired\).)90 1066 y(Alternativ)o(ely)l(,)e(EES)e(devices)h(could)g(limit)g
  1868. (the)f(n)o(um)o(b)q(er)g(of)f(incorrect)h(LEAFs)g(they)g(will)i(accept)e(\(p)
  1869. q(erhaps)0 1123 y(self-destructing)23 b(after)d(some)i(threshold)g(has)f(b)q
  1870. (een)i(reac)o(hed\),)f(or)f(could)i(imp)q(ose)f(a)f(longer)h(dela)o(y)g(b)q
  1871. (efore)0 1179 y(returning)g(the)f(result)h(of)f(an)h(attempt)e(to)h(load)h
  1872. (an)f(in)o(v)m(alid)j(LEAF.)d(These)g(approac)o(hes)h(are)f(di\016cult)i(to)0
  1873. 1236 y(engineer)16 b(reliably)l(,)h(ho)o(w)o(ev)o(er,)d(and)h(greatly)g
  1874. (increase)h(the)f(vulnerabilit)o(y)j(of)c(the)h(system)g(to)f
  1875. (denial-of-service)0 1292 y(attac)o(ks)g(b)o(y)h(an)g(adv)o(ersary)f(who)h
  1876. (can)h(inject)g(noise)g(in)o(to)f(a)g(receiv)o(er's)g(datastream.)90
  1877. 1349 y(A)20 b(more)g(robust)f(solution)i(increases)g(the)f(size)h(of)e(the)h
  1878. (LEAF)h(c)o(hec)o(ksum)f(to)f(32)h(or)f(64)h(bits,)h(making)0
  1879. 1405 y(exhaustiv)o(e)14 b(searc)o(h)g(infeasible.)21 b(Of)14
  1880. b(course,)g(this)g(also)g(increases)g(the)g(size)g(of)g(the)f(LEAF)h(pac)o(k)
  1881. m(age)g(and)g(w)o(ould)0 1462 y(lik)o(ely)k(require)f(signi\014can)o(t)g
  1882. (re-engineering)h(of)e(man)o(y)g(EES)g(comp)q(onen)o(ts,)h(from)e(the)h(pro)q
  1883. (cessors)g(themselv)o(es)0 1518 y(to)f(the)g(proto)q(cols)g(and)g
  1884. (applications)i(that)e(use)g(them.)90 1574 y(Another)23 b(approac)o(h,)i
  1885. (whic)o(h)g(th)o(w)o(arts)c(non-in)o(terop)q(erable)k(as)f(w)o(ell)g(as)f(in)
  1886. o(terop)q(erable)i(rogues,)g(is)f(to)0 1631 y(sharply)c(restrict)g(the)g(a)o
  1887. (v)m(ailabilit)o(y)i(of)e(EES)g(devices)h(to)e(those)h(users)g(and)g
  1888. (applications)h(that)f(are)f(trusted)0 1687 y(not)g(to)g(abuse)h(them.)33
  1889. b(PCMCIA)19 b(cards,)h(b)q(eing)h(inheren)o(tly)g(p)q(ortable,)f(w)o(ould)g
  1890. (need)h(to)d(b)q(e)j(handled)g(with)0 1744 y(particular)d(care)f(to)f(a)o(v)o
  1891. (oid)h(their)h(use)f(b)o(y)g(unauthorized)i(individuals.)28
  1892. b(F)l(urthermore,)17 b(it)h(is)f(not)g(at)f(all)i(clear)0 1800
  1893. y(that)g(suc)o(h)i(restrictions)f(could)i(b)q(e)e(made)g(e\013ectiv)o(e)h(or)
  1894. f(consisten)o(t)g(with)g(the)h(goals)e(of)h(the)g(EES)g(program,)0
  1895. 1857 y(whic)o(h)d(aims)f(to)g(mak)o(e)g(the)g(system)g(widely)h(a)o(v)m
  1896. (ailable)h(to)e(the)g(public.)0 2000 y Fj(5)69 b(Conclusions)0
  1897. 2101 y Fi(The)17 b(EES)f(attempts)g(to)g(balance)h(the)g(seemingly)h
  1898. (con\015icting)g(goals)e(of)g(making)h(widely)h(a)o(v)m(ailable)g(a)e(strong)
  1899. 0 2158 y(cryptographic)h(system)g(while)i(also)e(ensuring)h(go)o(v)o(ernmen)o
  1900. (t)f(access)g(to)g(encrypted)h(tra\016c.)25 b(Rogue)17 b(applica-)0
  1901. 2214 y(tions)12 b(defeat)g(EES)g(b)o(y)f(making)h(use)g(of)g(the)g(cipher)h
  1902. (without)e(the)h(go)o(v)o(ernmen)o(t)f(\\bac)o(k)g(do)q(or.")19
  1903. b(Whether)11 b(rogues)0 2271 y(threaten)17 b(the)g(viabilit)o(y)i(of)e(the)g
  1904. (EES)g(program)f(dep)q(ends)j(on)e(whether)g(they)g(can)h(b)q(e)g(easily)g
  1905. (deplo)o(y)o(ed)g(for)e(a)0 2327 y(signi\014can)o(t)g(fraction)f(of)g(the)g
  1906. (tra\016c)g(in)h(their)f(target)f(application)j(areas.)90 2384
  1907. y(W)l(e)f(ha)o(v)o(e)g(iden)o(ti\014ed)j(t)o(w)o(o)c(classes)i(of)e(rogues.)
  1908. 23 b(The)17 b(most)e(general,)i(those)f(that)g(can)g(in)o(terop)q(erate)h
  1909. (with)0 2440 y(legal)j(EES)e(systems,)h(are)g(p)q(oten)o(tially)h(the)f(most)
  1910. e(damaging)i(to)f(the)h(EES)g(program.)29 b(These)19 b(applications)0
  1911. 2497 y(are)i(functionally)h(similar)g(to)e(their)i(non-rogue)f(coun)o
  1912. (terparts)f(and)h(ha)o(v)o(e)f(all)i(the)f(adv)m(an)o(tages)f(of)g(general)0
  1913. 2553 y(in)o(terop)q(erabilit)o(y)c(without)f(the)g(risk)g(of)f(wiretapping.)
  1914. 21 b(The)15 b(tec)o(hniques)h(used)f(to)f(implemen)o(t)i(them)f(do)f(carry)0
  1915. 2610 y(enough)19 b(of)e(a)h(p)q(erformance)h(p)q(enalt)o(y)l(,)g(ho)o(w)o(ev)
  1916. o(er,)f(to)f(limit)j(their)f(usefulness)g(in)h(real-time)f(v)o(oice)f
  1917. (telephon)o(y)l(,)964 2743 y(9)p eop
  1918. %%Page: 10 10
  1919. 9 bop 0 50 a Fi(whic)o(h)18 b(is)f(p)q(erhaps)h(the)f(go)o(v)o(ernmen)o(t's)e
  1920. (ric)o(hest)i(source)g(of)g(wiretap-based)g(in)o(telligence.)28
  1921. b(The)18 b(second)f(class,)0 107 y(those)e(that)f(can)h(in)o(terop)q(erate)g
  1922. (only)g(with)g(other)g(rogue)f(devices)i(explicitly)i(designed)e(to)e(th)o(w)
  1923. o(art)f(the)i(LEAF,)0 163 y(are)f(also)h(the)f(easiest)h(to)f(implemen)o(t)i
  1924. (and)f(the)g(hardest)f(to)g(prev)o(en)o(t.)19 b(Devices)d(in)f(this)g(class)g
  1925. (are)f(not)h(as)f(great)0 220 y(a)f(threat)f(to)h(EES)g(as)g(those)f(in)i
  1926. (the)g(former)e(class)h(b)q(ecause)h(they)g(do)f(not)f(conform)h(to)f
  1927. (o\016cial)i(in)o(terop)q(erabilit)o(y)0 276 y(standards.)25
  1928. b(Ho)o(w)o(ev)o(er,)16 b(if)i(the)f(p)q(opulation)i(of)d(legal)i(devices)h
  1929. (is)e(substan)o(tially)h(smaller)g(than)f(that)g(of)f(rogue)0
  1930. 332 y(devices)g(in)f(a)g(particular)g(mark)o(et,)e(lac)o(k)i(of)f(legal)i(in)
  1931. o(terop)q(erabilit)o(y)g(ma)o(y)e(not)g(b)q(e)h(a)g(signi\014can)o(t)g
  1932. (disadv)m(an)o(tage.)90 389 y(It)j(is)h(w)o(orth)f(noting)g(that,)g(with)h
  1933. (EES)g(PCMCIA)f(cards,)g(a)g(rogue)h(system)e(can)i(b)q(e)g(constructed)g
  1934. (with)0 445 y(little)h(more)e(than)g(a)g(soft)o(w)o(are)e(mo)q(di\014cation)k
  1935. (to)d(a)h(legal)h(system.)29 b(The)19 b(barriers)f(to)g(constructing)g(a)g
  1936. (rogue)0 502 y(soft)o(w)o(are)f(system)h(are)g(m)o(uc)o(h)h(smaller)g(than)g
  1937. (those)f(to)g(constructing)h(an)g(en)o(tire)g(rogue)f(hardw)o(are)g(pro)q
  1938. (duct,)0 558 y(and)i(the)g(proliferation)h(of)f(suc)o(h)g(soft)o(w)o(are)e
  1939. (is)j(next)f(to)f(imp)q(ossible)j(to)e(regulate)g(in)h(the)f(presence)h(of)e
  1940. (op)q(en)0 615 y(standards.)0 758 y Fj(6)69 b(Ac)n(kno)n(wledgemen)n(ts)0
  1941. 859 y Fi(Stev)o(e)16 b(Bello)o(vin,)i(Whit\014eld)g(Di\016e,)e(Joan)g(F)l
  1942. (eigen)o(baum,)h(P)o(eter)e(Honeyman,)i(Stev)o(e)f(Ken)o(t,)g(Jac)o(k)g(Lacy)
  1943. l(,)g(T)l(om)0 916 y(London,)21 b(Da)o(v)o(e)e(Maher,)h(Andrew)f(Odlyzk)o(o,)
  1944. j(Rob)e(Pik)o(e,)g(Jim)h(Reeds,)g(Mik)o(e)f(Reiter)g(and)g(Bruce)g(Sc)o
  1945. (hneier)0 972 y(o\013ered)c(inn)o(umerable)j(substan)o(tiv)o(e)e(commen)o(ts)
  1946. f(that)g(ha)o(v)o(e)h(greatly)f(impro)o(v)o(ed)h(this)g(pap)q(er.)26
  1947. b(W)l(e)17 b(w)o(ould)g(lik)o(e)0 1029 y(to)h(esp)q(ecially)k(ac)o(kno)o
  1948. (wledge)e(the)f(generous)g(assistance)g(of)g(v)m(arious)h(individuals)i(at)c
  1949. (NSA)i(in)g(pro)o(viding)g(us)0 1085 y(with)15 b(protot)o(yp)q(e)f(EES)g
  1950. (PCMCIA)h(cards)f(and)h(tec)o(hnical)h(data.)j(W)l(e)c(are)f(particularly)i
  1951. (grateful)e(for)g(the)h(spirit)0 1142 y(of)g(op)q(eness)h(and)f(collegialit)o
  1952. (y)i(displa)o(y)o(ed)g(b)o(y)e(the)g(mem)o(b)q(ers)h(of)e(NSA)i(in)g
  1953. (reviewing)g(these)g(results.)90 1198 y(The)f(author)g(remains,)g(of)g
  1954. (course,)g(solely)h(resp)q(onsible)h(for)e(an)o(y)g(errors)f(in)i(this)g(pap)
  1955. q(er.)90 1255 y(The)22 b(name)g(\\T)l(essera")f(is)h(a)g(trademark)e(of)i(T)l
  1956. (essera,)g(Inc.,)i(whic)o(h)f(neither)f(pro)q(duced)h(nor)f(licensed)0
  1957. 1311 y(the)e(go)o(v)o(ernmen)o(t-supplied)h(EES)f(PCMCIA)g(cards)g(to)f(whic)
  1958. o(h)i(w)o(e)f(refer)f(in)i(this)g(pap)q(er.)34 b(W)l(e)20 b(kno)o(w)g(of)f
  1959. (no)0 1368 y(connection)h(b)q(et)o(w)o(een)g(T)l(essera,)g(Inc.)33
  1960. b(and)20 b(the)f(EES)h(program.)31 b(Previous)20 b(references)g(to)f(EES)g
  1961. (PCMCIA)0 1424 y(cards)c(as)g(\\T)l(essera)g(cards")f(app)q(ear)i(to)e(ha)o
  1962. (v)o(e)h(b)q(een)h(made)g(in)g(error.)0 1567 y Fj(References)0
  1963. 1669 y Fi([DH76])69 b(W.)16 b(Di\016e)h(and)g(M.)f(E.)g(Hellman.)25
  1964. b(New)17 b(directions)h(in)f(cryptograph)o(y)l(.)24 b Fh(IEEE)16
  1965. b(T)m(r)n(ans.)g(on)h(Infor-)202 1725 y(mation)g(The)n(ory,)i
  1966. Fi(No)o(v)o(em)o(b)q(er)c(1976.)0 1819 y([Mar93])51 b(J.)14
  1967. b(Mark)o(o\013.)j(Comm)o(unications)d(plan)h(to)e(balance)i(go)o(v)o(ernmen)o
  1968. (t)e(access)i(with)f(priv)m(acy)l(.)19 b Fh(New)c(Y)m(ork)202
  1969. 1875 y(Times,)f Fi(April)j(16,)d(1993.)0 1969 y([NBS77])43
  1970. b(National)14 b(Bureau)g(of)f(Standards.)j(Data)d(Encryption)h(Standard,)f
  1971. Fh(F)m(e)n(der)n(al)g(Information)h(Pr)n(o)n(c)n(ess-)202 2026
  1972. y(ing)i(Standar)n(ds)g(Public)n(ation)f(46)p Fi(,)g(Go)o(v)o(ernmen)o(t)f
  1973. (Prin)o(ting)i(O\016ce,)g(W)l(ashington,)e(D.)h(C.,)f(1977.)0
  1974. 2119 y([NBS80])44 b(National)16 b(Bureau)g(of)f(Standards.)20
  1975. b(Data)14 b(Encryption)i(Standard)f(Mo)q(des)h(of)f(Op)q(eration,)g
  1976. Fh(F)m(e)n(der)n(al)202 2176 y(Information)f(Pr)n(o)n(c)n(essing)e(Standar)n
  1977. (ds)j(Public)n(ation)f(81)p Fi(,)f(Go)o(v)o(ernmen)o(t)f(Prin)o(ting)i
  1978. (O\016ce,)g(W)l(ashing-)202 2232 y(ton,)g(D.)h(C.,)f(1980.)0
  1979. 2326 y([NIST94])24 b(National)12 b(Institute)g(for)e(Standards)h(and)g(T)l
  1980. (ec)o(hnology)l(.)j(Escro)o(w)o(ed)c(Encryption)i(Standard,)f
  1981. Fh(F)m(e)n(der)n(al)202 2383 y(Information)16 b(Pr)n(o)n(c)n(essing)e
  1982. (Standar)n(ds)i(Public)n(ation)f(185)p Fi(,)h(U.S.)f(Dept.)f(of)h(Commerce,)f
  1983. (1994.)952 2743 y(10)p eop
  1984. %%Trailer
  1985. end
  1986. userdict /end-hook known{end-hook}if
  1987. %%EOF
  1988.