Khazad is a 128-bit key, 64-bit block cipher. Designed by Vincent Rijmen and
Paulo S. L. M. Barreto, Khazad is a NESSIE finalist for legacy-level block
ciphers. Khazad has many similarities with Rijndael, and has an extremely
high rate of diffusion.

WWW: http://search.cpan.org/dist/Crypt-Khazad