Cooperative Judgment Based Intrusion Detection System for Wireless Ad-hoc Network.

The open-shared communication medium, highly in-stable network topology, limited resources makes the mobile ad-hoc networks an easy target for the network attackers. These attackers could execute a wide variety of attacks ranging from black-hole, wormhole, jamming to malicious attacks. To detect such attacks there is special system called the Intrusion Detection System (IDS). Currently, there are several IDS available, but, the entire detection and decision process is carried out by a single node. The proposed system is an IDS based on collective decision technique. Under this system all the nodes have to cooperate during the detection phase. This system works under four phases namely election, detection, collection and announcement. All the nodes in the network would be consulted before confirming a culprit node as a malicious node. Here if the culprit node is confirmed to be exhibiting malicious behavior then a global alarm is immediately generated by the leader.