基于分簇的无线传感器网络动态密钥管理方案

针对现有无线传感器网络密钥计算量过大、存储空间过多和管理不够灵活的问题,在基于分簇的网络拓扑结构基础上,引入虚拟网格技术,提出基于分簇的无线传感器网络动态密钥管理方案。在簇头与活动节点之间采用基于簇基密钥的预分配策略进行通信,在簇头之间采用基于Blom矩阵并结合随机数的对密钥进行通信,该方案能在活动节点或簇头被捕获或能量耗尽时实现密钥的动态更新。与现有方案相比较,此方案能动态更新密钥,有着更好的安全性并具有良好的扩展性。

Dynamic Key Management Scheme for Wireless Sensor Networks Based on Cluster

To tackle the problems of excessive computation overhead and storage space and inflexible management adhering to the existing wireless sensor networks,a cluster based dynamic key management scheme is proposed based on the clustered network topology and virtual grid technology.Within the scheme,the communication between the cluster head and the active nodes is conducted using pre-distribution strategy of the head key,and the communication between cluster heads is conducted using,pair-wise key based on the combination of Blom matrix and random numbers.The scheme can dynamically update the key when the active nodes or cluster heads are captured or their energy is used up.Compared with the existing schemes,the proposed scheme can dynamically update the key and is of higher security and good scalability.