A novel approach for detecting and eliminating cooperative black hole attack using advanced DRI table in Ad hoc Network

Ad hoc Network is a self organized autonomous network that consists of mobile nodes which communicate with each other over wireless links .Wireless ad hoc networks are not well protected against the attack of malicious nodes due to security vulnerabilities in the routing protocols. One of the common attacks in MANETs is the Black hole Attack, in which malicious node falsely claiming it to have the fresh and shortest path to the destination and then drops all the receiving packets. If this malicious node work together as a group then the damage will be very serious. This type of attack is known as Cooperative Black Hole attack. We proposed a mechanism to mitigate single black hole attack as well as cooperative black hole attack to discover a safe route to the destination by avoiding attacks. In this paper we proposed an approach for better analysis and improve security of AODV, which is one of the popular routing protocols for MANET. Our scheme is based on AODV protocol which is improved by deploying Advanced DRI table with additional check bit. The Simulation on NS2 is carried out and the proposed scheme has produced results that demonstrate the effectiveness of the mechanism in detection and elimination of the attack and maximizing network performance by reducing the packet dropping ratio in network.