Prevention of Wormhole Attack Using Identity Based Signature Scheme in MANET

Mobile ad hoc network (MANET) has attracted many security attacks due to its characteristics of dynamic topology, limited resources and decentralize monitoring. One of these vulnerable attack is wormhole in which two or more malicious nodes form a tunnel like structure to relay packets among themselves. This type of attack may cause selective forwarding, fabrication and alteration of packets being sent. In this paper, we have proposed a way to protect network from wormhole attack by using identity based signature scheme on cluster based ad hoc network. Proposed scheme does not require distribution of any certificate among the nodes so it decreases computation overhead. We have also discussed existing work that either require certifcates or does not accomplish all the security requirements of network. Our simulation results show that attack is prevented successfully and it outperforms other schemes.