Wireless Routing Protocol Based on Trust Evaluation

Wireless networks have specific characteristics that are totally different from conventional networks. In fact, ad hoc networks are closely depending on the distributed cooperation among mobile nodes. Deploying trust evaluation in such environment will be an extra challenge. In this paper, we present a newest model permitting trust evaluation and establishment based on ad hoc routing protocol. Trust evaluation and establishment provide representing, evaluating and maintaining trust within the network, and serve as the basis for higher level routing operations. Our model is an events-based according to the routingpsilas relationships between mobile nodes. Logical and computational trust analysis and evaluation are deployed among network nodes. Each node´s evaluation of trust on other nodes should be based on experience statistics computed around two routing events: NRE (new route events) and RFE (route failure events). First ones refer to the new requests or responses in order to establish a new route; however, second ones are consequences of a loss or errors due to existing route problems. To ensure efficiency, the experience statistics are computed by being based on linear temporal logic (LTL) model. Finally and in order to prove the applicability of the proposed solution, we further present an adaptive routing protocol (A²ODV: adaptive AODV) and analyze its efficiency around some performances metrics.