EFFICIENT MECHANISM FOR MITIGATING MULTIPLE BLACK HOLE ATTACKS IN MANETS
Abdul-Rahman Salem, Rushdi A. Hamamreh · 2016
Mobile ad hoc networks (MANETs) have emerged as a major next generation wireless networking technology. Due to their inherent capabilities of instant communication, they are used for wide range of applications such as emergency operations and disaster recovery. On the other hand, many challenges are facing MANETs including security, routing, transmission range and dynamically changing topology with high nodes mobility. Security is considered as the main obstacle for the widespread adoption of MANET applications. Black hole attack is a type of DoS attack that can disrupt the services of the network layer. It has the worst malicious impact on network performance as the number of malicious nodes increases. Several mechanisms and protocols have been proposed to detect and mitigate its effects using different strategies. However, many of these solutions impose more overhead and increase the average end-to-end delay. This paper proposes an enhanced and modified mechanism called RID-AODV, based on a preceding mechanism: RID-AODV. The proposed enhancement is based on creating dynamic blacklists for each node in the network. Each node, according to criteria depends on the number of mismatches of hash values of received packets as compared with some threshold values, can decide to add or remove other nodes to or from its blacklist. Enhanced RIDAODV was implemented in ns-2 simulator and compared with three previous solutions for mitigating multiple black hole attacks in terms of performance metrics. The results show an increase in throughput and packet delivery ratio and a decrease in end-to-end delay.