Detection and Prevention of Collaborative Attacks in Manet

Malicious and selfish behaviors represent a serious threat against routing in delay/disruption tolerant networks. Due to the unique network characteristics, designing a misbehavior detection scheme in tolerant network (TN) is regarded as a great challenge. The sending information from source to destination, the message stored in a node in spite of destination user in a non- coverage area. In this paper, we propose iTrust Delay Torrent network (DTN), a probabilistic misbehavior detection scheme, for secure DTN several routing toward efficient trust establishment to the base station. The basic idea of iTrust is introducing a periodically available Trusted Authority (TA) to judge the node's behavior based on the collected routing evidences and probabilistically checking. In this model iTrust as the inspection game and use game theoretical analysis to demonstrate that, by setting an appropriate investigation probability, TA could ensure the security of iTrust DTN routing at a reduced cost. To further improve the efficiency of the proposed scheme, we correlate detection probability with a node's reputation, which allows a dynamic detection probability determined by the trust of the users. The extensive analysis and simulation results demonstrate the effectiveness and efficiency of the proposed scheme.