Abstract
Even though the ad-hoc on-demand distance vector (AODV) is a broadly used routing protocol for mobile ad-hoc networks (MANETs), it is vulnerable to a blackhole attack. Lu et al. developed a secure MANET routing protocol called SAODV to address the security weakness associated with the original AODV protocol and to remedy the blackhole attack. Specifically, the SAODV protocol can protect against blackhole attack performed by a malicious node during the routing process. However, it cannot resist the cooperative blackhole attack, in which two nodes are participating together to mount such attack. Therefore, this paper proposes a secure MANET routing protocol called BP-AODV to overcome the security breaches related to the SAODV protocol along with the original AODV protocol. In addition, the BP-AODV is able to protect against a cooperative blackhole attack launched during the routing process and guards against the blackhole attack that might take place during the forwarding process. The BP-AODV is developed by extending the functionality of the AODV protocol along with utilizing the chaotic map features. The experimental results assure that the BP-AODV protocol is more secure than the SAODV protocol and can effectively fight the blackhole attack achieved by a malicious node or cooperative malicious nodes during the routing process. The results also reveal that the BP-AODV can strongly guard against the blackhole attack that occurs during the forwarding process.