Intrusion Detection System for Detecting Malicious Nodes in Mobile Ad hoc Networks

Abstract

A mobile ad hoc network (MANET) is a self-configuring infrastructure less network of mobile devices connected by wireless links. In this network, a mobile node behaves as a host and a router at the same time. MANETs are highly vulnerable to attacks than wired networks due to their characteristics. Ad hoc network maximize the total network throughput by using all available nodes for routing and forwarding. Hence, a node can misbehave and fail to establish route or route the data due to its malicious activity to decrease the performance of ad hoc network. In this paper, we propose an intrusion detection system to detect the malicious nodes in MANETs. The propose detection algorithm is divided into two phases: Detection during route establishment and Detection during data forwarding. The detection effectiveness of the proposed algorithm is more than 80% and for some cases detection effectiveness may reach to 100%. The silent feature of propose scheme is its simplicity and effectiveness in detecting malicious nodes.