User-space interface for symmetric key cipher algorithms

modulename: algif_skcipher.ko

configname: CONFIG_CRYPTO_USER_API_SKCIPHER

Linux Kernel Configuration
└─>Cryptographic API
└─>User-space interface for symmetric key cipher algorithms
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
This option enables the user-spaces interface for symmetric
key cipher algorithms.

source code:
crypto/algif_skcipher.c