Abstract:

Since the existing trust mechanism fails to tackle the problem that malicious nodes cooperate with each other, malicious collusion detection data forwarding in Opportunistic Sensing is proposed. First, the transient connection subnets are constructed according to the state of connection between nodes. At the same time, the anomalous interaction subsets with the maximum aggregation density are searched on the basis of analyzing the abnormal interaction behavior, and the malicious consonants are detected. Second, the transient trust relationship between nodes is evaluated through connection strength and collaboration willingness by establishing the transient trust subnet, so as to select the best relay node for completing data forwarding. Results show that the proposed mechanism can reduce adverse effects of collusion attacks effectively, and can achieve the purpose of accurate and efficient data forwarding.

Key words: opportunistic sensing, data forwarding, malicious collusion detection