Mitigating Collaborative Blackhole Attacks on DSR-Based Mobile Ad Hoc Networks

Isaac Woungang (Ryerson University, Canada); Sanjay Kumar Dhurandher (University of Delhi, India); Rajender Dheeraj Peddi (Ryerson University, Canada); and Issa Traore (University of Victoria, Canada)

A Mobile ad hoc network (MANET) is a collection of mobile nodes that rely on co-operation amongst devices that route packets to each other. From a security design perspective, MANETs have no clear line of defense.. This lack of security leads the network accessible to both legitimate network users and malicious attackers. A blackhole attack is a severe attack that can be employed against data routing in MANETs. A blackhole is a malicious node that can falsely reply for any route requests without having an active route to a specified destination and drop all the receiving data packets. The attack may even lead to more devastating damage if two or more blackhole nodes cooperate with each other to launch an attack. This type of attack is known as collaborative blackhole attack. In this paper, a novel scheme (so-called DCBA) for detecting collaborative blackhole attacks in MANETs is introduced. Simulation results are provided, showing that the DCBA outperforms DSR in terms of packet delivery ratio and network throughput, chosen as performance metrics, when collaborative blackhole nodes are present in the network.

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