Wormhole attacks in MANET

A mobile ad hoc network or MANET are those wireless networks which posses no infrastructure which are connected by the wireless nodes. And these nodes are generally mobile and the connectionless links are used basically to connect these nodes and these nodes have the capability to self organize and self configure and self arrangement capability. They are not having uniform structure. Because of their mobility and their dynamic nature they are prone to many kinds of malicious attacks by the malicious users because in this every node acts as a sender receiver and the router so no node can be able to understand whether the data has been sent by the malicious sender or the true sender or the receiving node is the true node. Hence by this the data can be lost as well as can be dropped by the malicious user and it can send the fake data to the receiver as well. So there are actually many kinds of attacks at the network layer. MANETS are generally more prone to cyber attacks rather than the wired networks because of their mobile nature. So these attacks like wormhole attacks are a very big issue in the case of networks. As the demand of wireless networks is increasing day by day. So it is a big concern of about how to prevent these kinds of attacks. So that they may not affect the network layer further. So in this paper we are focusing upon these attacks and also about how by using hardware rather than software we can solve the wormhole attacks by using cryptography and the digital signature method.