Fast DES code

I have translated the public domain DES/triple DES code in the back of Applied Cryptography into highly tuned assembler for the Intel 386/486/Pentium processors.

On a 400 MHz Pentium-II running Linux 2.2.6, the execution speeds in megabits/sec are as follows:
x86 asm Portable C
DES 55.6 45.7
3DES 24.2 18

Relaxation of US Export Controls

On January 14, 2000 the United States Government relaxed its export regulations governing cryptographic source code. The software on these web pages all qualify as
Encryption source code which is available to the public and which is not subject to an express agreement for the payment of a licensing fee or royalty for commercial production or sale of any product developed with the source code
so they are now available from this website without restriction as to destination. They are still available through the export-controlled North American Cryptography Archives server: