Review on Detection of Wormhole Attack in AODV Protocol based MANET

A Mobile Ad-hoc Network (MANET) is a self-configuring, infrastructure-less network of mobile devices connected wirelessly. MANET is used commonly around the world, because it has the ability to communicate with each other without any fixed network. Routing protocols are requires for communication and synchronization in such ad hoc networks. Security is most important service of all kinds of network communications. MANET are more vulnerable to security attacks due to its features like open medium, changing its topology dynamically, lack of central monitoring and management. Security attacks in MANET are classified into passive attacks and active attacks. Among some of the prominent security threats worm-hole attack is considered as one of the most severe security attack because it is difficult to detect. A wormhole attack can be easily launched by the attacker without having knowledge of the network or compromising any legitimate nodes or cryptographic mechanisms. Hence an efficient mechanism to detect wormhole attack has to be developed.