Movement based or neighbor based tehnique for preventing wormhole attack in MANET

Mobile adhoc networks (MANETs) have been proposed to support dynamic scenarios where no infrastructure exists. Each node in the network acts as a host as well as a router and, forwards traffic to other nodes. MANETs can be set up quickly and at low cost in contrast to infrastructure networks which may be wired or wireless. There is an increasing threat of attacks on the MANET Wormhole attack is one of the active internal attacks in which two or more attacker nodes tunnel the traffic from one location to another location in the network. Wormhole attack is a very big security issue of mobile ad hoc network. That cannot be easily detected in which two malicious or attacker node joins together and create tunnels between them. The proposed technique discovers an alternative route to the target node. Because the shortest path can have the malicious attacker. The implementation of the secure route discovery protocol is performed using NS2 and by modification of the AODV routing protocol.