A text-file specification for CAST-128, a freely available 128-bit block cipher.

A freely available 128-bit block cipher designed by Counterpane Systems (Bruce Schneier et al.).

TEA is a very small, efficient algorithm offering a moderate level of security

The company's AES proposal using 128 bit blocks. Contains descriptions, pseudocode and test vectors.

Describes the 128-bit block cipher designed to replace DES. It was a finalist in the AES competition.

Contains cipher source code and technical explanations for SEAL, Skipjack and other well known ciphers.

The Data Encryption Standard, supporting ECB and CBC modes. Also has a function for Triple DES. Includes an explanation of how the program works and source code.

Contains source code in C for this stream cipher which uses 160 to 2048-bit keys. Short keys are fast on 32-bit processors.

Konton2 is a stream cipher which does not resemble RC4 and does not use shift registers. The C source code for Konton2 is provided.

Describes the Snow stream cipher: both Snow 1.0 submitted to the NESSIE project and Snow 2.0. Snow is the work of Patrik Ekdahl and Thomas Johansson of the I.T. Dept. at Lund Univ., Sweden. The C source code for Snow is also provided.