Wormhole Detection Methods-A Survey

The dynamic and cooperative nature of ad hoc networks presents considerable challenges in securing and detecting attacks in these networks. A security attack, called the wormhole attack, has been introduced in the context of ad-hoc networks. During the attack, a malicious node captures packets from one location in the network, and tunnels them to another malicious node at a distant point. Wormhole nodes can grab the route from the source node to the destination node, then it drop, or sniff the packets. A wormhole attack poses various threats and it is difficult to prevent. Many techniques have been evolved to detect wormhole attack. This paper presents a survey of various techniques used to detect wormhole attacks. Based on the metrics like packet loss rate, Throughput and Detection rate a comparative study is also done.