Wormhole Detection Method based on Location in Wireless Ad-Hoc Networks

In mobile ad-hoc networks, multi path routing is vulnerable since network topology is constantly changed and nodes join or leave the network frequently. So malicious nodes can drop or modify, fabricate packets for interruption of communication because of no guaranteeing reliability of nodes. Wormhole attack is one of the serious attacks which form a serious threat in the networks, especially against ad-hoc wireless routing protocols. Detection of this attack which uses colluding nodes is more difficult than attacks by single node. In this paper, we present a countermeasure for detection of wormhole attack, which efficiently mitigates the wormhole attack in ad-hoc networks. This method is based on location information of each node in DSR protocol. Each intermediate node appends its own ID with location information into a request packet and source node analyzes distance of between each node in a reply packet