CTR_DRBG

configname: CONFIG_CRYPTO_DRBG_CTR

Linux Kernel Configuration
└─>Cryptographic API
└─>Random number generation
└─>NIST SP800-90A DRBG (Deterministic Random Bit Generator)
└─>CTR_DRBG
In linux kernel since version 3.10 (release Date: 2013-06-30)  
CTR_DRBG variant as defined in NIST SP800-90A.

This uses the AES cipher algorithm with the counter block mode.