framer-802154: Support for creating and parsing frames with security
headers
framer-802154: Support for setting and accessing the frame type
attribute
CC2420: Securing outgoing frames by using the hardware-acceleration
capabilities of the CC2420
CC2420: Providing access to hardware-accelerated security
NETSTACK_LLSEC: Calling NETSTACK_LLSEC.bootstrap from contiki-sky-main.c
nanosec: compromise-resilient link layer security driver