Institute of Research and Journals (IRAJ)
Wormhole attack is considered to be a serious security attack in multi-hop ad hoc networks. In wormhole attack, attacker makes tunnel from one end of the network to the other, nodes stay in different location on two ends of tunnel believe that they are true neighbors and makes conversation through the wormhole link. Unlike many other attacks on ad-hoc routing, a wormhole attack cannot be prevented with cryptographic solutions because intruders neither generate new, nor modify existing, packets, but rather forward existing ones. In this paper, a technique to effectively detect wormhole attacks without the need for special hardware and/or strict location or synchronization requirements is proposed.