LITERATURE SURVEY ON WORMHOLE ATTACK

Security plays an important role in Mobile Ad Hoc Network when data transmission is performed within un - trusted wireless scenario. Various attacks like Black hole, Wormhole, Gray hole and many more have been identified & corresponding solutions have been proposed. These attacks are caused by the malicious node hence ad hoc wireless network is unprotected from the attacks of the malicious node. Between all these attacks the wormhole att ack is harmful attack in which two or more malicious nodes create a virtual tunnel in the network. Two types of wormhole attacks have been recognized: Hidden attack and Exposed attack. Many detection techniques are proposed by the researchers for both type s of wormhole attacks