中文摘要：

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（TrustbasedDynamicKeyManagementinwire—lesssensornetworks）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。

英文摘要：

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.