基于节点信任值的无线传感器网络安全路由

Secure routing based on node trust value in wireless sensor networks

提出一种基于节点信任值的层次型路由算法以提高无线传感器网络数据传输过程中的路由安全。该算法根据节点网络行为定义了多种信任因子,并采用加权平均的方法进行信任计算;结合信任值、密集度和节点间距离进行路由主干节点的可信选举;利用信任值排除恶意节点,建立安全可信的层次路由。实验和仿真结果表明,该算法能有效评估节点的信任值,避免了低信任值节点参与网络数据转发,解决了节点失效或被俘获所导致的层次路由安全问题。

A hierarchical routing algorithm based on node trust value is put forward to enhance routing security during data transmission in wireless sensor networks. Various trust factors are defined in accordance with node behaviors, and the synthesized trust value is obtained through calculating the weighted average of all kinds of direct and indirect trust values. At the same time, the trust value is combined with the density and the distance between nodes to select the backbone nodes of the network. Finally, the local trust value is employed to exclude malicious nodes and estab- lish a reliable hierarchical route. Experiment and simulation results show that the proposed algorithm can effectively evaluate the node trust value and prevent low trust nodes from transferring data packets. Furthermore, the security problem of hierarchical route caused by node failure or capture is solved.