Study of Intrusion Detection Techniques in MANET

MANET has no clear line of defense. Hence it is accessible to both legitimate network nodes and malicious node. Traditional ways of protecting the network are not sufficient and effective. Therefore intrusion detection system (IDS) is required that monitor the network and detect the misbehavior and anomalies. Intrusion detection is an important part of computer security. In this paper, discussion is on the need of intrusion detection system and also focuses on various intrusion detection techniques, especially anomaly intrusion detection techniques which are more crucial in MANET than misuse based detection techniques.