An Efficient Scheme for Detecting Malicious Nodes in Mobile Ad Hoc Networks

This paper proposes a scheme capable of effectively detecting a malicious node that normally operates during determination of a route over a mobile ad-hoc network (MANET) but modifies or drops data during data transmission or reports wrong information regarding a normal node, using a report message and a report table that list reporter nodes and suspect nodes. In the existing schemes, a malicious node that provides wrong information can be easily identified but cannot be removed from a network. To solve this problem, the proposed scheme determines a suspect node as a malicious node when more than k lists of reporter nodes and suspect nodes are recorded in the report table in case where k malicious nodes are over the network. The proposed scheme is applicable to both DSR and AODV routing.