Enable the /proc/keys file by which all keys may be viewed

configname: CONFIG_KEYS_DEBUG_PROC_KEYS

Linux Kernel Configuration
└─>Security options
└─>Enable the /proc/keys file by which all keys may be viewed
In linux kernel since version 2.6.12  
This option turns on support for the /proc/keys file through which
all the keys on the system can be listed.

This option is a slight security risk in that it makes it possible
for anyone to see all the keys on the system. Normally the manager
pretends keys that are inaccessible to a process don't exist as far
as that process is concerned.

depends
CONFIG_KEYS