Trust Based Routing for Misbehavior Detection in Ad Hoc Networks

Node misbehavior due to selfish or malicious intention could significantly degrade the performance of MANET because most existing routing protocols in MANET are aiming at finding most efficiency path. To deal with misbehavior in MANET, an incentive mechanism should be integrated into routing decision-making. In this paper firstly we review existing techniques for secure routing, and then propose to use trust vector model based routing protocols. Each node would evaluate its own trust vector parameters about neighbors through monitoring neighbors’ pattern of traffic in network. At the same time, trust dynamics is included in term of robustness. Then we integrated trust model into Dynamic Source Routing (DSR) and Ad-hoc On Demand Distance Vector (AODV) which are most typical routing protocols in MANET. We evaluate the performance of those trust routing protocols by comparing the simulation results of with and without the proposed trust mechanism. The simulation results demonstrate that modified routing protocols can effectively detect malicious nodes and mitigate their attacks.