Isolation of Malevolent Nodes using Supportive Trap in Mobile Adhoc Networks

In MANET all nodes are infrastructureless and self configured. There is no separate router used in the network and each node in the network performs the functions of the router. The security in the MANET is very less. The network needs the cooperation of all nodes for routing the packets. But some nodes may not cooperate and hence exploit the routing process.A malicious sends false route reply to the source stating that it has the shortest path to the destination and hence drop all the packets.Using Dynamic Source Routing a detection scheme called Cooperative Bait Detection Scheme is used to detect the malicious nodes. It aims at detecting and preventing malicious nodes from performing gray hole/collaborative black hole attacks. This method uses adjacent node’s cooperation to trap the malicious nodes in MANET. Then isolating the malicious nodes from performing black hole/grey hole attack.