IEEE 802.1AE MAC-level encryption (MACsec)

modulename: macsec.ko

configname: CONFIG_MACSEC

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>IEEE 802.1AE MAC-level encryption (MACsec)
In linux kernel since version 4.1 (release Date: 2015-06-21)  
MACsec is an encryption standard for Ethernet.

source code: