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TUTORIAL.DOC USA-CRYPTO 08/01/93
The following is a tutorial for USA-CRYPTO. In it we 'walk-through' solving
cipher #1 from the database. It is designed to demonstrate the operations of
USA-CRYPTO, as well as to introduce anyone to some methods for solving
cryptograms.
SOLVING CIPHER #0001:
Select <F5> to bring up the Entry Selection Window. Select 'Cipher from USA-
CRYPTO database.' Then enter Cipher Number 1.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 14:55:13]═╗
║ ║
║ Plaintext Elapsed Time : : ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ ║
║ Unused ABCDEFGHIJKLMNOPQRSTUVWXYZ ║
║ ║
║ ║
║ ║
║ ║
║ ┌───────────────────────────────────────────┐ ║
║ │ Cipher from: [■] USA-CRYPTO database │█ ║
║ │ [ ] Keyboard Entry │█ ║
║ └─────┌───────────────────────────────┐─────┘█ ║
║ █████│ Cipher Number: 0001 │███████ ║
║ │ │█ ║
║ │ Last Accessed: 07/14/93 │█ ║
║ │ Last Solved: 07/14/93 │█ ║
║ │ Times Solved: 002 │█ ║
║ │ Best Solution Date: 07/14/93 │█ ║
║ │ Best Solution Time: 00:21:08 │█ ║
║ │ Decoder Id: LSO │█ ║
║ └───────────────────────────────┘█ ║
║ █████████████████████████████████ ║
║ Continue [y/n] ? ║
╚══════════════════════════════════════════════════════════════════════════════╝
<Y> retrieves the cipher text. This is a big cipher; almost all the screen is
filled up, so we shouldn't have too much difficulty 'cracking the code'.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 14:55:17]═╗
║ ║
║ Plaintext Elapsed Time 00:00:02 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused ABCDEFGHIJKLMNOPQRSTUVWXYZ Decoder Id: LSO Best Date 05/31/93 ║
║ ║
║ , , ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ , , ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ , , ║
║ ABCBKPB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ , ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ ( , ) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ F1=HELP F3=SCREEN CLEAR F5=NEW CIPHER F7=FREQUENCY F9=HINT ║
╚══════════════════════════════════════════════════════════════════════════════╝
1. First step is to call up the frequency window <F7>. From it we see that B
is the most frequent cipher letter. It's therefore a good guess that it
represents a plaintext E (the most frequent letter).
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 14:55:41]═╗
║ ║
║ Plaintext Elapsed Time 00:00:26 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused ABCDEFGHIJKLMNOPQRSTUVWXYZ Decoder Id: JTO Best Date 05/31/93 ║
║ ┌─────────┬─────────┐ ║
║ , │Code Freq│Code Freq│█ , ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK │ A 11 │ N 1 │█BOCBZQ RKFLK, ║
║ │ B 41 │ O 21 │█ ║
║ , │ C 9 │ P 22 │█ ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXK│ D 2 │ Q 32 │█EB ZLJJLK ║
║ │ E 9 │ R 12 │█ ║
║ , , │ F 22 │ S 2 │█ ║
║ ABCBKPB, MOLJLQB QEB DBKBOXI TBICXOB, X│ G 1 │ T 2 │█P LC IFYBOQV QL ║
║ │ H 0 │ U 0 │█ ║
║ , │ I 10 │ V 3 │█ ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK │ J 8 │ W 0 │█PQFQRQFLK CLO ║
║ │ K 19 │ X 15 │█ ║
║ ( ,│ L 27 │ Y 5 │█ ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB,│ M 7 │ Z 9 │█ ║
║ └─────────┴─────────┘█ ║
║ █████████████████████ ║
║ ║
║ F1=HELP F7=EXIT ║
╚══════════════════════════════════════════════════════════════════════════════╝
While in the frequency window, select <F1> for the help panel. We've placed
some hints about standard frequencies of letters and short words. The examples
are given in decreasing frequency (e.g., A is the most frequent 1 letter word).
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 14:55:43]═╗
║ ║
║ Plaintext Elapsed Time 00:00:28 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused ABCDEFGHIJKLMNOPQRSTUVWXYZ Decoder Id: LSO Best Date 05/31/93 ║
║ ┌─────────┬─────────┐ ║
║ , │Code Freq│Code Freq│█ , ║
║ TB ┌────────────────────────────────────────────────────────────────────┐, ║
║ │ Frequency Window │█ ║
║ │ │█ ║
║ BPQ│ This window shows the frequency of the cipher characters. High │█ ║
║ │ frequency characters would include plaintext {E, T, A, O, I, N} │█ ║
║ │ and low frequencies would include plaintext {K, X, J, Q, Z}. │█ ║
║ ABC│ │█QL ║
║ │ Although not related to the single character frequency window, │█ ║
║ │ other most frequent short words would be: │█ ║
║ LRO│ │█ ║
║ │ 1 character - {A, I} │█ ║
║ │ 2 character - {OF, TO, IN, AS, IS, BE} │█ ║
║ QEB│ 3 character - {THE, AND, YOU, FOR, WAS} │█ ║
║ │ 4 character - {THAT, WILL, HAVE, WITH} │█ ║
║ └────────────────────────────────────────────────────────────────────┘█ ║
║ ██████████████████████████████████████████████████████████████████████ ║
║ Select <Enter> or <Esc> to exit help and continue ║
╚══════════════════════════════════════════════════════════════════════════════╝
Just starting to solve the cipher, the cursor is on the master plaintext line in
the upper left corner. Move the cursor over to just above B, and type E. All
the occurrences of cipher=B (41 according to the frequency window), fills in E.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 14:56:11]═╗
║ ║
║ Plaintext E Elapsed Time 00:00:56 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused ABCD FGHIJKLMNOPQRSTUVWXYZ Decoder Id: JTO Best Date 05/31/93 ║
║ ║
║ E E E E E E E , E E E E , ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ E E, E E , E E ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ E E E, E E E E E E, E E E E E ║
║ ABCBKPB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ E E E , E ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ E E E E ( E E, ) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ F1=HELP F3=CLEAR F5=ENTRY F7=FREQUENCY ║
╚══════════════════════════════════════════════════════════════════════════════╝
2. Once we've guessed where E is, we usually look for three letter words
ending in E. There are many, but the most probable is plaintext THE.
Noticing we have cipher=QEB several times, its probable that cipher=QEB stands
for plaintext=THE. Move the cursor above any QEB, and type THE (the E was
already there from the first substitution).
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 14:57:33]═╗
║ ║
║ Plaintext EF H O T Elapsed Time 00:02:18 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused ABCD G IJKLMN PQRS UVWXYZ Decoder Id: LSO Best Date 05/31/93 ║
║ ║
║ E THE EO E OF THE TE T TE , O E TO FO O E E FE T O , ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ E T H T E, E O E T T T , O E FO THE O O ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ EFE E, O OTE THE E E E F E, E E THE E OF E T TO ║
║ ABCBKPB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ O E E O O TE T , O O E T H TH O T T T O FO ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ THE TE T TE OF E ( E E, O T T T O ) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ F1=HELP F3=CLEAR F5=ENTRY F7=FREQUENCY ║
╚══════════════════════════════════════════════════════════════════════════════╝
3. Looking at two letter cipher words, we have TB & LC & FK; several LC's;
looking at the frequency window help screen, we see that plaintext=OF is the
most common 2 character word. Type OF just above any cipher=LC.
4. On line #4, just after the comma, we have a 2 letter word ending with O.
A common 2 letter word would be TO; move the cursor to that position and type
T. Oops, the buzzer and error message, show we've already used T (in THE).
Since we really like the looks of THE, we'll select any key to remove the
error message, and look for more likely entries.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 14:58:10]═╗
║ ║
║ Plaintext EF H O T Elapsed Time 00:02:55 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused ABCD G IJKLMN PQRS UVWXYZ Decoder Id: LSO Best Date 05/31/93 ║
║ ║
║ E THE EO E OF THE TE T TE , O E TO FO O E E FE T O , ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ E T H T E, E O E T T T , O E FO THE O O ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ EFE E, O OTE THE E E E F E, E E THE E OF E T TO ║
║ ABCBKPB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ O E E O O TE T , O O E T H TH O T T T O FO ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ THE TE T TE OF E ( E E, O T T T O ) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ Letter already used; Select any key to continue ║
╚══════════════════════════════════════════════════════════════════════════════╝
5. On line #2 at the far right, we have a 3 letter word FO_, suggesting
plaintext=R as the substitution for cipher=O. Move the cursor; make the
entry. I like the looks of "FOR THE", a likely phrase fragment; also repeated
late in line 4.
6. Looking for a single letter word, in line #1 we have cipher=X. The most
probable 1 letter word is A; make the substitution.
7. looking at the little 2 letter word in the middle of the line #1
(cipher=FK). Looking at the frequency window for both those letters, shows
they are both high frequency (22, 19). <F1> brings up the help window and
both I and N are among the 6 most frequent letters, and IN is a high frequency
2 letter word; move the cursor and type plaintext= IN above cipher=FK.
8. On lines 3 and 4 we have cipher=AN_. This could be plaintext=AND. Make
the entry of plaintext=D over either cipher=A.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 15:00:22]═╗
║ ║
║ Plaintext DEF HI NO R T A Elapsed Time 00:05:07 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused BC G JKLM PQ S UVWXYZ Decoder Id: LSO Best Date 05/31/93 ║
║ ║
║ E THE EO E OF THE NITED TATE , IN ORDER TO FOR A ORE ERFE T NION, ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ E TA I H TI E, IN RE DO E TI TRAN I IT , RO IDE FOR THE O ON ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ DEFEN E, RO OTE THE ENERA E FARE, AND E RE THE E IN OF I ERT TO ║
║ ABCBKPB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ O R E E AND O R O TERIT , DO ORDAIN AND E TA I H THI ON TIT TION FOR ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ THE NITED TATE OF A ERI A ( REA E, ON TIT TION) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ F1=HELP F3=CLEAR F5=ENTRY F7=FREQUENCY ║
╚══════════════════════════════════════════════════════════════════════════════╝
9. On line #4 next to plaintext=AND is O_R. If we were really stumped by this
substitution, we could move the cursor to the space between O and R, <F9> would
displays a hint line at the bottom of the screen showing Cipher R = Plaintext U.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 15:00:58]═╗
║ ║
║ Plaintext DEF HI NO R T A Elapsed Time 00:06:13 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #1001 Best Time 00:21:08 ║
║ Unused BC G JKLM PQ S UVWXYZ Decoder Id: JTO Best Date 05/31/93 ║
║ ║
║ E THE EO E OF THE NITED TATE , IN ORDER TO FOR A ORE ERFE T NION, ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ E TA I H TI E, IN RE DO E TI TRAN I IT , RO IDE FOR THE O ON ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ DEFEN E, RO OTE THE ENERA E FARE, AND E RE THE E IN OF I ERT TO ║
║ ABCBKZB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ O R E E AND O R O TERIT , DO ORDAIN AND E TA I H THI ON TIT TION FOR ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ THE NITED TATE OF A ERI A ( REA E, ON TIT TION) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ Cipher R = Plaintext U ║
╚══════════════════════════════════════════════════════════════════════════════╝
This action (like buying a vowel from Wheel of Fortune's Vanna White) costs you
30 seconds of elapsed time. Select any key to remove the message, and type U.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 15:01:03]═╗
║ ║
║ Plaintext DEF HI NO R TU A Elapsed Time 00:06:18 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #1001 Best Time 00:21:08 ║
║ Unused BC G JKLM PQ S VWXYZ Decoder Id: JTO Best Date 05/31/93 ║
║ ║
║ E THE EO E OF THE UNITED TATE , IN ORDER TO FOR A ORE ERFE T UNION, ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ E TA I H U TI E, IN URE DO E TI TRAN UI IT , RO IDE FOR THE O ON ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ DEFEN E, RO OTE THE ENERA E FARE, AND E URE THE E IN OF I ERT TO ║
║ ABCBKZB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ OUR E E AND OUR O TERIT , DO ORDAIN AND E TA I H THI ON TITUTION FOR ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ THE UNITED TATE OF A ERI A ( REA E, U ON TITUTION) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ F1=HELP F3=CLEAR F5=ENTRY F7=FREQUENCY F9=HINT ║
╚══════════════════════════════════════════════════════════════════════════════╝
10. Line #1 shows plaintext=OF THE UNITED _TATE_; the same letter at either
end of the word suggests plaintext=S for cipher=P.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 15:01:37]═╗
║ ║
║ Plaintext DEF HI NO RSTU A Elapsed Time 00:06:52 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused BC G JKLM PQ VWXYZ Decoder Id: LSO Best Date 05/31/93 ║
║ ║
║ E THE EO E OF THE UNITED STATES, IN ORDER TO FOR A ORE ERFE T UNION, ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ ESTA ISH USTI E, INSURE DO ESTI TRAN UI IT , RO IDE FOR THE O ON ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ DEFENSE, RO OTE THE ENERA E FARE, AND SE URE THE ESSIN S OF I ERT TO ║
║ ABCBKPB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ OURSE ES AND OUR OSTERIT , DO ORDAIN AND ESTA ISH THIS ONSTITUTION FOR ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ THE UNITED STATES OF A ERI A ( REA E, US ONSTITUTION) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ F1=HELP F3=CLEAR F5=ENTRY F7=FREQUENCY ║
╚══════════════════════════════════════════════════════════════════════════════╝
11. We can see several mostly filled words at which we could make a good guess.
The bottom line says "UNITED STATES OF" suggesting AMERICA.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 15:01:56]═╗
║ ║
║ Plaintext DEF HI MNO RSTU A C Elapsed Time 00:07:11 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused B G JKL PQ VWXYZ Decoder Id: LSO Best Date 05/31/93 ║
║ ║
║ E THE EO E OF THE UNITED STATES, IN ORDER TO FORM A MORE ERFECT UNION, ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ ESTA ISH USTICE, INSURE DOMESTIC TRAN UI IT , RO IDE FOR THE COMMON ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ DEFENSE, ROMOTE THE ENERA E FARE, AND SECURE THE ESSIN S OF I ERT TO ║
║ ABCBKPB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ OURSE ES AND OUR OSTERIT , DO ORDAIN AND ESTA ISH THIS CONSTITUTION FOR ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ THE UNITED STATES OF AMERICA ( REAM E, US CONSTITUTION) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ F1=HELP F3=CLEAR F5=ENTRY F7=FREQUENCY ║
╚══════════════════════════════════════════════════════════════════════════════╝
12. Line #1 suggests that it begins with WE THE PEOPLE and ends with A MORE
PERFECT UNION.
13. Guessing at the rest, we complete decoding the PREAMBLE, US CONSTITUTION.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 15:02:05]═╗
║ ║
║ Plaintext DEFGHIJ LMNOPQRSTUVW Y ABC Elapsed Time 00:07:20 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused K X Z Decoder Id: LSO Best Date 05/31/93 ║
║ ║
║ WE THE PEOPLE OF THE UNITED STATES, IN ORDER TO FORM A MORE PERFECT UNION, ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ ESTABLISH JUSTICE, INSURE DOMESTIC TRANQUILITY, PROVIDE FOR THE COMMON ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ DEFENSE, PROMOTE THE GENERAL WELFARE, AND SECURE THE BLESSINGS OF LIBERTY TO ║
║ ABCBKPB, MOLJLQB QEB DBKBOXI TBICXOB, XKA PBZROB QEB YIBPPFKDP LC IFYBOQV QL ║
║ ║
║ OURSELVES AND OUR POSTERITY, DO ORDAIN AND ESTABLISH THIS CONSTITUTION FOR ║
║ LROPBISBP XKA LRO MLPQBOFQV, AL LOAXFK XKA BPQXYIFPE QEFP ZLKPQFQRQFLK CLO ║
║ ║
║ THE UNITED STATES OF AMERICA (PREAMBLE, US CONSTITUTION) ║
║ QEB RKFQBA PQXQBP LC XJBOFZX (MOBXJYIB, RP ZLKPQFQRQFLK) ║
║ ║
║ ║
║ ║
║ Congratulations on a new record solution. Select <Enter> to record your id. ║
╚══════════════════════════════════════════════════════════════════════════════╝
14. As the last character is filled in, we get a beep and message showing
"congratulations...". When the solution is obtained in a record time, the
database update window is displayed to accept the decoder id (3 initials),
and the record updated.
╔═[USA-CRYPTO]═════════════════════════════════════════════[07/16/93 15:02:10]═╗
║ ║
║ Plaintext DEFGHIJ LMNOPQRSTUVW Y ABC Elapsed Time 00:07:20 ║
║ Cipher ABCDEFGHIJKLMNOPQRSTUVWXYZ DB Cipher #0001 Best Time 00:21:08 ║
║ Unused K X Z Decoder Id: LSO Best Date 05/31/93 ║
║ ║
║ WE THE PEOPLE OF THE UNITED STATES, IN ORDER TO FORM A MORE PERFECT UNION, ║
║ TB QEB MBLMIB LC QEB RKFQBA PQXQBP, FK LOABO QL CLOJ X JLOB MBOCBZQ RKFLK, ║
║ ║
║ ESTABLISH JUSTICE, INSURE DOMESTIC TRANQUILITY, PROVIDE FOR THE COMMON ║
║ BPQXYIFPE GRPQFZB, FKPROB ALJBPQFZ QOXKNRFIFQV, MOLSFAB CLO QEB ZLJJLK ║
║ ║
║ DEFENSE, PROMOTE THE ┌───────────────────────────────┐LESSINGS OF LIBERTY TO ║
║ ABCBKPB, MOLJLQB QEB │ Cipher Number: 0001 │█BPPFKDP LC IFYBOQV QL ║
║ │ │█ ║
║ OURSELVES AND OUR POS│ Last Accessed: 07/16/93 │█IS CONSTITUTION FOR ║
║ LROPBISBP XKA LRO MLP│ Last Solved: 07/16/93 │█FP ZLKPQFQRQFLK CLO ║
║ │ Times Solved: 003 │█ ║
║ THE UNITED STATES OF │ Best Solution Date: 07/16/93 │█) ║
║ QEB RKFQBA PQXQBP LC │ Best Solution Time: 00:07:20 │█) ║
║ │ Decoder Id: JTO │█ ║
║ └───────────────────────────────┘█ ║
║ █████████████████████████████████ ║
║ Enter your initials (3) to update the record. ║
╚══════════════════════════════════════════════════════════════════════════════╝
15. Now it's time to lean back and bask in the glory of another USA-CRYPTO job
well done!
Looking at the plaintext master line in the upper corner, we see the solution
set to be the alphabet shifted over 3 spaces. Julius Caesar was said to use
this shifted cipher. Cryptologists refer to this as a 'Caeser 3' cipher.
Cipher #1 is the only USA-CRYPTO database cipher using the Caesar cipher
substitution. All others use a randomly generated solution set.
Good Luck!
* * * END OF USA-CRYPTO TUTORIAL.DOC * * *
