AODV Based Black-Hole Attack Mitigation in MANET

Abstract

Packet dropping is a very dangerous attack in case of limited resource networks like Mobile Ad-Hoc Network (MANET). During this attack the malicious node first claims that it has the freshest route to the destination, so the sender selects this as the coordinating node and starts sending data packets to the destination via this node. But afterwards it drops them rather forwarding to the destination. In this paper we give a very clever packet dropping or Black-hole attack detection and prevention technique. Here we use the notion of AODV’s sequence number for identifying the Black-hole node in the network. Without using any extra packet or modifying any of the existing packet formats our method can efficiently detect and prevent the Black-hole or packet dropping attack in MANET. All the detection prevention are done by the originator node, so the originator need not relying on the other nodes in the network for this purpose. This method not only detects or prevents the Black-hole attack but is also capable to isolating the Black-hole node from the network.