4 - description of the Linux Security Module framework.
6 - how to get started with the SELinux security enhancement.
8 - documentation on the Smack Linux Security Module.
10 - documentation on the AppArmor security extension.
12 - documentation about credentials in Linux.
14 - description of the kernel key request service.
15 keys-trusted-encrypted.txt
16 - info on the Trusted and Encrypted keys in the kernel key ring service.
18 - description of the kernel key retention service.
20 - documentation on the TOMOYO Linux Security Module.