TRUSTED KEYS

modulename: trusted.ko

configname: CONFIG_TRUSTED_KEYS

Linux Kernel Configuration
└─>Security options
└─>TRUSTED KEYS
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
This option provides support for creating, sealing, and unsealing
keys in the kernel. Trusted keys are random number symmetric keys,
generated and sealed by a trust source selected at kernel boot-time.
Userspace will only ever see encrypted blobs.

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

source code: