A MISBEHAVIOR DETECTION SCHEME ESTABLISHMENT IN DELAY TOLERANT NETWORKS?

Delay Tolerant Network(DTNs) are a class of unique network characterized like lack of guaranteed connectivity ,typically low frequency between DTN nodes and long propagation delay within the networks. Existing routing algorithms for DTN assumes that nodes are willing to forward packets for others but in real word selfish and malicious behaviors occurs while forward packets for nodes. Due to unique characteristics the message propagation process DTNs follows a Store-Carry and Forward manners. In this paper, we propose iTrust, probabilistic misbehavior detection schemes for secure and to improve the efficiency of DTN routing towards efficient trust establishment. The basic idea of iTrust is introducing Trusted Authority (TA) to judge the nodes behavior based on the collected routing evidences and probabilistically checking. To further improve the performance of the proposed probabilistic inspection schemes, we introduce a reputation system. The extensive analysis and simulations result shows that the proposed schemes substantiate the effectiveness and efficiency of the proposed schemes.