International Journals of Advanced Information Science and Technology (IJAIST)
Mobile Ad hoc NETwork (MANET) is an infrastructure less network where routing protocols play a major role. Because of the features like unreliability of wireless link between nodes, dynamic topology, limited battery power, lack of centralized control and others, the mobile ad hoc networks are more vulnerable to suffer from malicious behavior, security threats and attacks. The prevention methods like firewalls, authentication and cryptography techniques alone are not able to provide the security. Therefore Intrusion Detection System (IDS) is required for MANETs. An effort has been made to overcome the problems of overhearing technique by incorporating Double Hash Authentication Technique (DHT) in to the routing protocol.