Secure AODV Routing Protocol Based on Trust Mechanism

Abstract

A mobile ad hoc network (MANET) is a wireless network with high of mobility, no fixed infrastructure and no central administration. These characteristics make MANET more vulnerable to attack. In ad hoc network, active attack i.e. DOS, and blackhole attack can easily occur. These attacks could decrease the performance of the routing protocol. In this chapter, we proposed new trust mechanism that has the ability to detect and prevent the potentials attacks into a wireless ad hoc network especially for Denial of Service (DOS) and blackhole attacks. We have proposed some modifications of AODV routing protocol with implemented a trust level calculation. Our proposed mechanism will detect the attack by calculate local and global trust parameters. When a node is suspected as an attacker, the security mechanism will isolate it from the network before communication established. To perform the trust calculation, each node should get all the activity information from his neighbor. In order to ensure the nodes can hear all the activities of his neighbors, each node will run in promiscuous mode. Simulation has been conducted using NS-2 to evaluate our proposed protocol under dos and blackhole attack. We compare the performance of our proposed protocol with existing secure routing protocol such as TCLS [14], LLSP [16], and RSRP [17]. The simulation result shows that our proposed protocols outperform other secure protocols under DOS and blackhole attack in term of packet delivery ratio, end to end delay and routing overhead. We demonstrate that the proposed protocol improves significantly the performance of secure routing protocol.