Abstract
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 evaluate the performance of the proposed mechanism by modifying Dynamic Source Routing (DSR) so that each node has a dynamic changing "trust vector" for its neighbors' behaviors. We also compare the simulation results of with and without the proposed mechanism. The simulation results demonstrate that the proposed mechanisms can effectively detect malicious nodes and mitigate black hole attacks.
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