针对无线传感器网络(wireless sensor network,WSN)的特点以及面临的网络安全问题,提出了一个基于联系数的信任评估模型。系统节点通过该信任模型对邻居节点的网络行为进行监测,再利用基于联系数的信任多属性决策方法选取最优的可信节点后进行数据包的转发。实验结果表明,该模型计算开销少,符合WSN能量受限的特点,且能较好地实现入侵检测,提高检测的准确率,防范路由攻击。 Aiming at the characteristics of wireless sensor network (WSN) and the network security problems it faces, this paper proposes a trust evaluation model based on the connection number. The system node monitors the network behavior of the neighbor nodes through the trust model, and then uses the trust-based multi-attribute decision making method based on the connection number to select the optimal trusted node and then forwards the data packet. Experimental results show that this model has less computational cost and meets WSN energy limitation, and can achieve intrusion detection better, improve detection accuracy and prevent routing attacks.