基于EBS 的动态密钥管理方法共谋问题

设计安全、合理的密钥管理方法是解决无线传感器网络安全性问题的核心内容.基于exclusion basis system(EBS)的动态密钥管理方法由于安全性高,动态性能和可扩展性好,受到了广泛关注.但在这种方法中存在共谋问题,即对于被捕获节点通过共享各自信息实施的联合攻击抵抗性较差.针对这一问题,分析了传感器节点形成共谋过程中的特点,以最短共谋链的长度为目标提出了共谋问题的优化模型.在此基础上,提出了基于离散粒子群算法的无线传感器网络共谋问题优化方法.仿真实验结果表明,与前人的工作相比,采用此优化模型和方法不仅提高了捕获网络难度,而且显著增强了网络对捕获节点的抵抗性.

Collusion Problem of the EBS-Based Dynamic Key Management Scheme

The security of wireless sensor networks has attracted much attention in recent years and the key management is the focus. EBS-based dynamic key management scheme is a new approach for wireless sensornetworks. Its major advantages are its enhanced network survivability, high dynamic performance and better support for network expansion. But it suffers from the collusion problem, which means it is prone to the cooperative attack of the compromised nodes. In this paper, the feature of the collusion problem is analyzed and an optimization model is proposed, maximizing the length of the shortest collusion chain, which is the key issue of the problem. A discrete particle swarm optimization algorithm for the collusion problem is also presented based on the optimization model proposed. Simulation results show that compared with the former works, the resilience of the network and the difficulty to compromise the whole network are both greatly improved.