A Reputation Based Scheme to Prevent Routing Misbehavior in Manets

Mobile Ad Hoc Network (MANET) system is not only subject to most of the well known attacks and threats that the wired and conventional wireless network suffered, but also a large number of additional attacks and threats. Security has become a primary concern in order to provide protected communication between mobile nodes in a hostile environment. Security is not a single layer issue but a multilayered issue. An individual mobile node may attempt to benefit from other nodes, but refuse to share its own resources. Such nodes are called selfish or misbehaving nodes and their behavior is termed selfishness or misbehavior. Most of the existing solutions to such misbehavior rely on the watchdog technique, which suffers from many drawbacks like that they may fail to detect misbehavior, causes additional routing overhead or raise false alarms in the presence of ambiguous collisions, receiver collisions, and limited transmission power. To mitigate the problem of routing layer misbehavior we analyze the existing misbehavior detection schemes and this paper propose a novel approach to overcome the drawbacks in existing techniques, and to improve the efficiency in detection.