Description

The development in wireless technologies and the high availability of wireless equipment in everyday life have made infrastructure-less networks very popular. MANETs are becoming more and more common due to their ease of deployment. Unlike the wireless networks having a fixed infrastructure, a mobile ad hoc network or MANET does not depend on a static infrastructure for operations based on networking, because of this security is a very challenging issue in MANET, there is a high possibility that the intermediate nodes can be malicious and they might be a threat to the security. Wormhole is the most frequently occurring attack in ad hoc networks in which one malicious node tunnels the packets from its location to other defective nodes. If the source node chooses this fake route, the attacker has the alternative of delivering the packets or dropping them. In this paper we have surveyed some existing techniques for detection of wormhole and a method for detecting and preventing wormhole attack in MANET is proposed. The proposed approach is based on Smart Packet, wormhole infected nodes can be detected based on acceptance of the smart packets by the nodes in the network. All the simulation will be done on ns2 using AODV routing protocol.