A Cryptographic Approach towards Black Hole Attack Detection

Abstract

A MANET is an infrastructure less network that consists of mobile nodes that communicate with each other over wireless links. In the absence of a fixed infrastructure, nodes have to cooperate with each other in order to provide the necessary network functionality for discovery and maintaining path. One of the principal routing protocols used in Ad hoc networks is AODV protocol. The security of the AODV protocol is threaded by a particular type of attack called ‘Black Hole’ attack. In this attack a malicious node advertises itself such a way that it has the shortest path to the destination node. This paper gives solution for co-operative Black Hole Attack at the time of route discovery phase and gives solution without monitoring other nodes. Monitoring technique increases network traffic and also cause of power loss. This paper uses RSA security Algorithm to identify Reply packet comes from destination only.