Serpent cipher algorithm

modulename: serpent_generic.ko

and/or

serpent.ko

configname: CONFIG_CRYPTO_SERPENT

Linux Kernel Configuration
└─>Cryptographic options
└─>Serpent cipher algorithm
In linux kernel since version 2.6.12  
Serpent cipher algorithm, by Anderson, Biham & Knudsen.

Keys are allowed to be from 0 to 256 bits in length, in steps
of 8 bits. Also includes the 'Tnepres' algorithm, a reversed
variant of Serpent for compatibility with old kerneli code.

See also:
<http://www.cl.cam.ac.uk/~rja14/serpent.html>

source code: