Abstract
Wireless shared medium, randomly moving nodes and multi-hop architecture make mobile ad hoc networks vulnerable to various network layer threats. Grayhole attack is such a prominent network layer threat, in which a malevolent node attempts to establish a bogus route passing through itself and performs packet forwarding misbehavior by dropping a subset of the received data packets in order to degrade the network performance. In this paper, we address this issue by proposing a heuristic approach, referred to as sequence number based bait detection scheme, which attempts to isolate malevolent nodes during route discovery process. The mechanism is incorporated with ad hoc on-demand distance vector routing protocol. Performance of the proposed scheme is compared with an existing scheme under three grayhole adversary models adopting distinct mode of operations. Simulation results under various network parameters depict that the proposed scheme improves network performance depending upon the mode of operations of the adversaries.
Published Version
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