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Mobile ad hoc networks are comprised of nodes that must cooperate to dynamically establish routes using wireless links. Routes may involve multiple hops with each node acting as a host and router. Since ad hoc networks typically work in an open un-trusted environment with little physical security, they are subject to a number of unique security attacks like wormhole attack. The wormhole attack is considered to be a serious security attack in multi-hop ad hoc networks. In wormhole attack, attacker makes tunnel from one end of the network to the other, nodes stay in different location on two ends of tunnel believe that they are true neighbors and makes conversation through the wormhole link.
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