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Aminet 21
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Aminet 21 (1997)(GTI - Schatztruhe)[!][Oct 1997].iso
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XPK_Crypt_Libs.txt
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1997-08-08
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Now, I can proudly present 2 new encryption libraries for the XPK package. As
on aminet only weak cryptography is allowed, I cannot upload these libs.
BUT:
You may download them from my homepage:
http://www.informatik.uni-leipzig.de/privat/dpauli/public_html/home.html
The xpkBLFH.library has been available since Jan '97, but the first versions
for the plain 68000 systems seemed to be corrupt. You may download a fixed
and a bit faster version now.
The second library is xpkCAST.
That library combines the speed of xpkFEAL with the security of xpkIDEA.
For speed see the following table:
-----BEGIN PGP SIGNED MESSAGE-----
Results from a benchmark of XPK-Encryption-Sublibs
Machine: A4000T/68040@25MHz/OS3.1/setpatch43.6/18 MB Ram
Testfile: an 1,500,000 bytes large File located in RAM:
The test was done by dragging the file to the appicon of xDrop on the
workbench.
If available, the Turbo-Versions of the sublibs are used.
All computations are done in Mode CBC.
Sublibrary | En-/Decryption-Speed | Keylength | Remarks
---------------+-----------------------+-----------+-------------------------
BLFH | 106KB/s | <=56 bytes| until now, there is no
| | | other method in breaking
| | | this algorithm than
| | | testing all possible
| | | keys.
---------------+-----------------------+-----------+-------------------------
CAST | 160KB/s | <=10 bytes| same as BLFH
+-----------------------+-----------+-------------------------
| 126KB/s |11-16 bytes| same as BLFH
---------------+-----------------------+-----------+-------------------------
IDEA | 152KB/s | <=16 bytes| same as BLFH
---------------+-----------------------+-----------+-------------------------
FEAL | | |
"fastest" | 364KB/s | | broken by S. Murphy
(4 rounds) | | |
-----------+-----------------------+ +-------------------------
"fast" | 310KB/s | | broken by Biham & Shamir
(8 rounds) | | |
-----------+-----------------------+ +-------------------------
"safe" | 254KB/s | <= 8 bytes| broken by Biham & Shamir
(16 rounds)| | | with the use of differ-
| | | ential kryptanalysis.
| | |
-----------+-----------------------+ +-------------------------
"safer" | 163KB/s | | same as BLFH
(32 rounds)| | |
-----------+-----------------------+ +-------------------------
"safest" | 106KB/s | | same as BLFH
(64 rounds)| | |
---------------+-----------------------+-----------+-------------------------
BLFH uses the Blowfish-algorithm by Bruce Schneider.
CAST uses the CAST-128-algorithm by C. Adams.
IDEA uses the "International Data Encryption Algorithm" by X. Lai & Prof. Dr.
L. Massey
FEAL uses the FEAL-N-algorithm by A. Shimizu & S. Miyaguchi at NTT Japan.
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Cheers, Dirk Pauli
dpauli@aix520.informatik.uni-leipzig.de