间断连接无线网络中的节点以协作方式完成消息投递，恶意节点将严重影响网络性能。利用节点历史行为信息，该文提出一种恶意节点容忍的消息转发策略，节点结合直接观察信息与邻居节点的推荐信息，通过动态推荐声誉阈值感知节点恶意行为，进而利用证据理论量化节点信任度，从而检测网络中串谋及独立的恶意节点，为消息选择最优的转发节点。结果表明，在带有串谋的恶意攻击下，所提出的消息转发策略能准确检测出恶意节点，并显著提高消息投递率，改善平均时延。%Packets in ICWN (Intermittently Connected Wireless Network) are delivered in a cooperation manner between nodes, which means the existence of malicious nodes will degrade the network performance. A malicious node tolerant message forwarding mechanism is proposed in this paper. By exploiting the historical node behavior information, directly observed information is combined with the recommendation information from neighbor nodes to perceive malicious node behavior according to the dynamical reputation threshold. Consequently, evidence theory is utilized to quantify the node relation to detect malicious nodes, and then the optimal relay nodes selecting can be achieved. Results show that, under the attack of collaborating malicious nodes, malicious nodes can be accurately identified by the proposed mechanism, which leads to the notably improving packet delivery ratio and average delay.
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