Twofish

modulename: twofish_generic.ko

configname: CONFIG_CRYPTO_TWOFISH

Linux Kernel Configuration
└─>Cryptographic API
└─>Block ciphers
└─>Twofish
In linux kernel since version 2.6.12  
Twofish cipher algorithm

Twofish was submitted as an AES (Advanced Encryption Standard)
candidate cipher by researchers at CounterPane Systems. It is a
16 round block cipher supporting key sizes of 128, 192, and 256
bits.

See https://www.schneier.com/twofish.html for further information.

source code: