• Suyash Bhardwaj
• Dr. Vivek Kumar

Mobile Ad hoc Networks or MANETs are infrastructure less, rapidly deployable temporary networks used for a communication in emergency situations or when the wired communication systems fail. It could be unfriendly environments, rough terrain or disaster situation; MANET performs exceptionally well; however, it falls short when exposed to routing attacks. To ensure the security and strength of the MANET in such unpredictable situations the requirement of a secure, effective, scalable, swift, and efficient mechanism is obligatory. The generally used protocol under MANET is AODV, however AODV performs well in any type of scenario except it is not secure from the attacks, from outside attackers as well from the inside compromised nodes. These attacks are tough to detect, furthermore complicated to avoid. Such an attack is Wormhole attack. In this paper, we propose a Novel Secure Cooperative Neighbour Based Approach in AODV (CNBWH-AODV) to identify and prevent wormhole attack. The wormhole attack is very difficult to detect, since a wormhole captures a routing message from one point of the network, tunnels it and then replay it at another point in the network. Wormhole node does not necessarily drop routing or data messages, and does not require the full message to be delivered at the same time. The message can be delivered in smaller parts or in bits using a high power wireless transmission antenna or direct wired connection. If a wormhole does not drop or modify data, it is almost impossible to detect the attacker. The most important part of our approach is detecting a wormhole attack without requiring any special hardware. Proposed approach uses the 1 hop neighbour information for identifying the colluding attacker, using cooperative neighbours. This approach works for both hidden and exposed type of wormhole attacks, and does not create any routing overhead. This approach is able to completely avoid the wormhole nodes and improves the performance of the network as shown in the simulations under NS2.

MANET, AODV, Worm Hole Attack, Cooperative Neighbour Based Detection Mechanism

"MITIGATING WORMHOLE ATTACK IN WIRELESS MOBILE ADHOC NETWORK", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.252-269, August-2018, Available :http://www.jetir.org/papers/JETIR1808187.pdf

"MITIGATING WORMHOLE ATTACK IN WIRELESS MOBILE ADHOC NETWORK", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp252-269, August-2018, Available at : http://www.jetir.org/papers/JETIR1808187.pdf