A secure routing mechanism in AODV for Ad Hoc networks

Ad hoc network is particularly vulnerable due to the lack of any centralized infrastructure. However, the typical on-demand routing protocols for ad hoc networks such as AODV and DSR have no security considerations and trust all the participants to correctly forward routing and data traffic. In this paper, the foundational conception of ad hoc networks and the routing attacks in them are introduced. A secure routing solution based on watchdog mechanism and credence value mechanism is proposed over the AODV. The watchdog mechanism is defined to judge whether a node has abnormal behavior in process of forwarding information. The credence value mechanism is used to evaluate a node´s credit standing. The performance of average end-to-end delay, packet drop ratio, routing load and average throughput are proved well by computer simulation.