ENCRYPTED KEYS

modulename: encrypted-keys.ko

configname: CONFIG_ENCRYPTED_KEYS

Linux Kernel Configuration
└─>Security options
└─>ENCRYPTED KEYS
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
This option provides support for create/encrypting/decrypting keys
in the kernel. Encrypted keys are instantiated using kernel
generated random numbers or provided decrypted data, and are
encrypted/decrypted with a 'master' symmetric key. The 'master'
key can be either a trusted-key or user-key type. Only encrypted
blobs are ever output to Userspace.

If you are unsure as to whether this is required, answer N.

source code: