Internet of Drones , also known as Flying Ad-hoc Networks (FANETs), are special ad-hoc networks characterized by very fast moving nodes, which can move in 3-dimensions. FANETs are one of the most fast changing dynamic networks with very high spacio-temporal volatility. The node density is often very sparse and the topology changes very fast. The communication with the ground station is over unlicensed band based protocols like WiFi. The fast movement of the nodes also allows the compromised node to carry out an insider attack in the network and then quickly move away to another the network. Since neither WiFi nor ad-hoc networks have a concept of cells or hand-overs, information about any compromised or malicious node is not passed on to the next network where the malicious node moves. This lack of exchange of security information and the rapid 3-D movement of drones makes detection and isolation of any compromised node even more challenging. Drones force the security solutions' space to be restricted to low latency, defensive mechanisms with low CPU , memory and power overheads.