Mitigating Selfish Misbehavior Attack in MANET by SMD Algorithm

MANET is a self-organized and decentralized wireless network, which is widely used in military applications, game parties, conferencing, etc. Due to its dynamic topology MANET is highly exposed to wide variety of attackers. Selfish misbehavior in channel allocation is a type of passive attack that affects the data link layer which will harm the network severely. As selfish misbehavior is a passive attack it is very difficult to detect. In this paper, Selfish Misbehavior Detection (SMD) algorithm is proposed that detects the selfish misbehavior during channel utilization. The mechanism uses cluster head for both detection and penalization. In every attack, detection process there is a possibility for false positive and false negative. In order to overcome this pitfall crosschecking mechanism is also integrated with the detection process. The proposed scheme not only simply detects the selfish behavior but also penalizes the selfish node.