Multipath routing cannot effectively resist security attacks against the network layer by a malicious node in wireless sensor networks. Combining multipath routing with node reliability evaluation, a secure multipath routing protocol was presented based on a reliability node. The trust value was obtained from the direct and indirect trust u-sing the weighted average method. The direct trust value of the nodes was obtained successfully from the factor of the rate of the forwarding packets and the rate of packet retransmission, and the indirect trust value of a node was obtained from the trust of neighboring nodes in the assessment node. The credit value was only created and exchanged among the cluster heads in order to reduce network overhead. Measured by the node reliability of the next hop node, secure multipalh routing was established by computing the number of multipaths to achieve the desired security requirements. Simulation results show that the protocol performs well in balancing energy consumption, ensuring the routing safety, and prolonging the network lifetime in wireless sensor networks.%针对多路径路由难以有效抵御恶意节点对无线传感器网络网络层的安全攻击,将多路径路由与节点可信度评价进行有效结合,以节点的转发数据包成功率和包重传率作为直接信任指标,邻居节点对评价节点的信任作为间接信任指标,提出一种基于可信节点的安全多路径路由协议.为降低网络开销,只对簇头节点进行可信度评价,并利用节点信任值衡量下一跳节点的可靠性,计算能达到期望安全性要求的多路径数目,进行信任多路径路由的建立.仿真结果表明:该协议能够有效地均衡路由能耗,延长网络生存周期,保障无线传感器网络的路由安全.
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