基于信任的无线传感器网络动态密钥管理方案

Trust-based Dynamic Key Management in Wireless Sensor Networks

在无线传感器网络安全体系中,密钥方案在解决面临内部攻击时抵抗能力较弱;作为密钥方案重要补充的信任管理机制,在识别被俘节点,解决内部攻击等方面有着优势;结合上述两者特点,提出了一种TDKM(Trust based Dynamic Key Management in wire-less sensor networks)方案,它将信任机制引入传统的动态密钥管理方案中,以节点的信任值作为判断被俘节点的依据,主动监测被俘节点,再通过动态密钥管理方案更新系统管理密钥;仿真结果表明,采用此模型显著增强了网络对捕获节点的抵抗性,有效解决了网络节点的共谋问题。

In the wireless sensor network security system, cryptography based security solutions are vulnerable when they confront inner --attacks, which are caused by captured nodes. As the cardinal complement of the cryptography based security solutions, trust management mechanism has its advantages in recognizing captured nodes and dealing with inner-- attacks. In regards to these two features, this paper pro- poses TDKM, a Trust based Dynamic Key Management in wireless sensor networks, which introduces trust mechanism into the traditional dynamic key management scheme, with the trust value of nodes as a basis for judging the captured nodes, actively monitor the captured nodes, and then updates system communication key through dynamic key management scheme. Simulation results show that this model sig- nificantly enhances the repellency of the network towards the captured nodes, effectively solves the collusion problem.