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针对无线传感器内部恶意节点可能产生的攻击行为进行分析,提出了基于无核心节点的信任评估机制,邻居节点间互相进行行为监控,利用一种基于多维度信任的计算模型得到了对方的信任值,再根据由D-S证据理论的合成法则,对直接信任与间接信任进行合成.实验结果表明,提出的方法能够有效对恶意节点的重放攻击、数据包数量异常、伪造数据等攻击行为进行限制,降低其节点信任值,提高无线传感网络的安全性和可靠性.
Aiming at the possible attack behaviors of malicious nodes in wireless sensor networks, a trust evaluation mechanism based on coreless nodes is proposed. Neighboring nodes monitor behavior of each other, and trust values of each other are obtained by using a computing model based on multi-dimensional trust. Then the synthesis of direct trust and indirect trust is based on the synthesis rule of DS evidence theory.The experimental results show that the proposed method can effectively limit the attacks of malicious nodes such as replay attacks, abnormal number of data packets and counterfeit data, and reduce Its node trust value enhances the security and reliability of wireless sensor network.