Detection of Malicious Nodes in Mobile Adhoc Network

Abstract

Mobile Ad hoc Networks (MANET) consists of mobile nodes so the network topology may change rapidly and unpredictably over time. The nodes themselves execute all the network activity including discovering network topology and delivering routing messages i.e. the network is decentralized so one or more of them may behave and disturb the network. The node can cause disturbance in the network by exhibiting selfishness or misbehavior. Intrusion Detection System (IDS) is developed to detect selfish or malicious node. It has different architecture. One is Stand Alone architecture and other is Distributed and co-operative architecture. Standalone Architecture uses Watchdog mechanism to detect selfish and misbehaving node that agree to forward packet but fails to do so. Path rater is mechanism used for removing path from cache that contain malicious or selfish node. By using the both these mechanisms with DSR protocol provides better security in routing of ad hoc network.