**7.2 Infrastructure layer**

The SDN-IoT infrastructure layer is integrated with constrained devices that require security algorithms that take less area to execute. Apart from timing, power, and energy [13] constraints, the area is another primary constraint of IoT devices. One of the metrics to measure the efficiency of the algorithm in terms of hardware area is gate equivalence. It is noted that GE less than 2000 is recommended for IoT devices in 5G network since they have very strict hardware and timing constraints, such as RFID tags, sensor nodes, smart and cards. All the encryption algorithms described here mostly have less than 2000 GE and are very efficient in terms of power consumption and timing.


reduction of 30% requires compact implementation of each component in both hardware and software.

