Security table

modulename: iptable_security.ko

configname: CONFIG_IP_NF_SECURITY

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>IP: Netfilter Configuration
└─>Security table
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
This option adds a `security' table to iptables, for use
with Mandatory Access Control (MAC) policy.

If unsure, say N.

source code:
net/ipv4/netfilter/iptable_security.c