Implementation of a trust model over AODV in a wireless ad hoc testbed

摘要

We have customized Ad hoc On demand Distance Vector (AODV) protocol and augmented security aspect in real time scenario using numeric step values called Trust assigned to finite number of neighbor nodes to evaluate network behavior, subsequently secure the network by barricading the network from malicious nodes in Blackhole and flooding attack modes. Experiments were carried out using a custom-made testbed built on wxPython that supports various characteristics of nodes like variable data rates, node positions and malicious behavior for testing and display results in a graphical format. The results have favored aforementioned proposal showing a 70% increase in throughput obtained from trust implemented experimentation as compared to standard one without the trust parameter. The overhead in trusted scenario encountered was minimal despite the end to end delay of packets being higher than the traditional AODV by 30 msec. Hence, we have concluded that our method of using trust has resulted in a secured reactive protocol with applications suited for wireless attack prone environment when applied to a network consisting of four nodes. Our work is also the first ever implementation of a trust model over an adhoc routing protocol in a real adhoc testbed.