Efficient Quality Trust Based Routing Algorithm to Enhance Security in Manet

A mobile ad-hoc network (MANET) is a peer-to peer wireless network where nodes can communicate with each other without the use of infrastructure such as access points or base stations, these networks are self-configuring. In this paper, a new algorithm is proposed to calculate the trust and QoS metric estimation into establishing a trustbased QoS model. In this model, the estimate the trust degree among nodes from direct trust computation of direct observation and indirect trust computation by neighbors’ recommendations are calculated. Due to the NPcompleteness of the multi QoS constraints problem,account link delay only considered as the QoS constraint requirement. Butproposed algorithm called EQTR (Efficient Quality Trust based Routing algorithm) designed from tradeoff between trust degree and link delay. The proposed algorithm is built in AODV (Ad hoc On-demand Distance Vector). The simulation results show that EQTRnot only improve the security performance and also prevent attacks from malicious nodes. It improves the performance in terms of packet delivery ratio and end to end delay compared to classic AODV. Keywords— Trust model,QoS, Efficient Quality Trust-based Routing,Trust degree and Link delay.