Abstract: In recent scenario, as the technology increasing communication and computing service are in demand, these services are operating under MANET. MANET is a self organizing wireless network which required more security than other networks. In wireless network the probability of attack is very high and in MANET security becomes one of the major issues of this type of network. Among several type of attack, wormhole attack is one of the most threatening and severe attack in routing. In wormhole attack it establish a tunnel shaped link between the network in which one malicious node will transfer packet from tunnel to another malicious node in a network and replays them locally .to prevent and detect this attack many researchers have proposed the solution and methods for attack. This paper will focus on the different aspects of the prevention and detection technique of wormhole attack.

Keywords: MANET, Wormhole Attack, Detection Technique.