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加密解密算法大全。很多很多的加密解密的实例

Submitter: Ross J Anderson
Algorithm: SERPENT

Optimised Java implementation
=============================

This floppy diskette (#3) contains the following files:

classes/
       /NIST/
            /KAT.class
            /MCT.class
            /test.class
            
       /Serpent
               /gen_plains.class
               /Serpent_Algorithm.class
               /Serpent_BitSlice.class
               /Serpent_Properties.class
               /Serpent_Standard.class
               
src
   /NIST
        /KAT.java
        /MCT.java
        /test.java
        
   /Serpent
           /gen_plains.java
           /Serpent_Algorithm.java
           /Serpent_BitSlice.java
           /Serpent_Properties.java
           /Serpent_Standard.java
 
Serpent.jar


 

This Java code is based on Cryptix code, but has been further optimised and
the format in which values are printed has been corrected.

There are actually two implementations: Serpent_Standard and
Serpent_Bitslice. The latter is much faster. You can select one or the
other by setting a constant in Serpent_Algorithm. Choose Serpent_Bitslice
unless you need debugging (since only Serpent_Standard outputs debugging
information).

There is code to produce the KAT and MCT text files. The original KAT/MCT
from Cryptix printed numbers the wrong way round with respect to Serpent's
conventions.

The NIST.test program helps measure the speed of the AES ciphers (Usage:
"java NIST.test Serpent").

We also supply the Serpent.gen_plains program, which generates the
plaintexts for the tables tests. (Usage: "java Serpent.gen_plains Serpent";
this will produce ecb_tables.txt.) It generates the plaintexts using
special functions (in Serpent_Standard), and then encrypts and decrypts the
results to print out the values and check its own correctness. Note that
the actual encryption/decryption can be done by either Serpent_Standard or
Serpent_Bitslice, depending on your selection in Serpent_Algorithm.

This bitslice code is almost 14 times faster than the latest cryptix code,
and about 35 times faster than their original code.

We are very grateful to the Cryptix group for making the Java code
available.

					Serpent authors