An Enhanced Wormhole Detection and Prevention Technique in MANETs

MANET

In wireless network many types of attacks can be initiated but most of them are relatively easy to detect because of their property of dramatically altering the network statistics but one different type of attack we have consider is very important when considering security issues of network, is wormhole attack, which is difficult to detect & can harm by directing important data to unauthorized nodes. During the route discovery process, a wormhole can relay route request and response messages between distant nodes, creating the appearance of shorter routes to destinations. Since the wormhole can be anywhere along a route, a source will have to detect its existence somewhere along the route when a node sets up the route (on-demand). In wormhole attacks, one malicious node tunnels packets from its location to the other malicious node. Such wormhole attacks result in a false route with fewer. If source node chooses this fake route, malicious nodes have the option of delivering the packets or dropping them. It is difficult to detect wormhole attacks because malicious nodes impersonate legitimate nodes The wormhole attack is possible even if the attacker has not compromised any hosts and even if all communication provides authenticity and confidentiality.

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