Enhancing AODV Routing Protocol to Eliminate Black Hole Attack in MANET

The mobile ad-hoc networks (MANETs) are self-organizing wireless networks that contain several mobile nodes to form an arbitrary and temporary network. As the lack of infrastructure network, the mobile nodes send the routing packets to each other in the network when they want to communicate. So, the nodes use the routing protocols to find a route to the intended destination. But, due to the lack of security mechanism of the routing protocols, MANETs are facing various severe security attacks. Black hole attack is such types of attacks and can carry great damage to the network. As a result, an efficient and simple routing algorithm for MANET is very important. This paper proposed a simple approach to detect and eliminate the black hole attack against ad hoc on-demand distance vector (AODV) routing protocol for MANET. The proposed system slightly modifies AODV protocol by adding two tables and packet type alarm. The proposed mechanism removes the malicious node and chooses the reliable node by using these tables. When the malicious node is detected, the proposed system is automatically sending out the alarm packets to all nodes in the network about the intruder node.