DIMH: A novel model to detect and isolate malicious hosts for mobile ad hoc network

Since route discovery based on broadcasting query packets is the basis of route protocol in ad hoc network, any node may compromise the routing protocol functionality by disrupting the route discovery process by modifying routing topology information, by fabricating false routing topology information and by impersonating other nodes. To solve the problem of security routing and ensure the right routing information, we present a novel model called DIMH to detect, isolate the malicious host and provide the integrity and authentication mechanism for routing information. Method of isolating malicious host and ensuring the right route information is that the i + 1 th malicious host is carried out by cooperation between the ith host and i + 2 th host. The model can validly detect attack from two colluding malicious hosts that cooperate to tamper with routing information. Our model guarantees that fabricated, compromised, or replayed route replies would either be rejected or never reach back the querying node.