Secured POR for Flooding Attack Prevention in Extremely Dynamic Ad Hoc Networks

Abstract

To address the problem of flood attacks and communication hole in large scale networks, a Secured Position-based Opportunistic Routing (SPOR) protocol which exploits stateless property of geographic routing as well as the cooperation between the nodes is proposed in this paper. When a data packet is transmitted, the neighbour nodes that have overheard the transmission will serve as forwarding candidates, and take their best efforts to forward the packet if it is not relayed by the specific best forwarder within a certain amount of time. Also a new trust approach based on the extent of friendship between the nodes is proposed which makes the nodes to co-operate and prevent flooding attacks in an ad hoc environment. The problem of communication hole can be greatly reduced using Virtual Destination-based Void Handling (VDVH) scheme working along with POR. The performance of this trust algorithm along with POR achieves excellent performance even under high node mobility with acceptable overhead and the VDVH scheme reduces hole problem.