Collaborative Alert in a Reputation System to Alleviate Colluding Packet Droppers in Mobile Ad Hoc Networks

The nature of the ad hoc network seems to have a promising future in real world and vast researches are going on to make the network more secure in an open wireless environment. The misbehaving nodes in ad hoc network results in degradation of overall network throughput and creates difficulty in finding route between nodes. Thus the collaborative nature of ad hoc network seems to be endangered due to the presence of misbehaving nodes and even get worse when the misbehaving node colludes to misbehave. This paper addresses a colluding packet dropping misbehavior and proposes a collaborative alert mechanism in a reputation system to alleviate it. The simulation result shows that the proposed system increases overall network throughput, reduces the malicious drop and false detection when compared to existing system and defense less scenario.