An Approach for Detection and Removal of Wormhole Attacks in Mobile Adhoc Network

The infrastructure of a Mobile Adhoc Network (MANET) has no routers for routing and all nodes must share the same routing protocol to assist each other while transmitting messages. Almost all common routing protocols at present consider performance as first priority and have little defense capability against the malicious nodes. Many researchers have proposed protocols of higher safety to defend against such malicious attacks. Each protocol has specific defense objects and are unable to defend against particular attacks. Of all the types of attacks the wormhole attack poses the greatest threat and is very difficult to prevent them. This paper focuses on a prevention mechanism by combining three techniques based on hop count, anomalous method and neighbor list count methods to detect and isolate wormhole attacks in ad hoc networks.