Defend against Wormhole Attack Based on Neighbor Trust Evaluation in MANET
Jing Chen · 2006
Mobile Ad hoc Networks(MANET) is a new networking paradigm for wireless hosts. Because of self-organization, dynamic topology and openness of wireless links, routing security in MANET is more seriously than in wired networks. Wormhole attack is one of deadly attacks to MANET, which is executed by two or more attackers by constructing a tunnel to replay routing protocol. Under this attack, routing protocol will not work, especially which rely heavily on reception of broadcast packets as a means for neighbor detection.In this paper we give a new definition of neighbor which stresses neighbor's function as the first relay. Then we introduce Marsh model. By gathering data from neighbor's events node can evaluate trustiness of its neighbor. From building neighbor's trustiness, false neighbor formed by wormhole attack will be scored lower value because of transmission failures events in MAC layer. When finding route, node will choose higher trust value neighbor to relay packet. We apply model in OLSR protocol and simulate it in NS2.