WSN中基于邻居发现的动态密钥管理方案

摘要

为了提高网络安全性能,提出基于邻居发现的无线传感器网络动态密钥管理方案.该方案在初始化过程中利用节点邻居列表构造簇拓扑结构模型,进行同化多项式密钥分配,保证邻居节点所分配的密钥多项式组合汉明距离最小.在节点添加和周期性密钥更新的过程,簇首根据网络拓扑结构的变化,为节点分配最优的密钥组合.与SHELL相比,该方案有效降低了节点开销,并提高了网络的安全性能.%Key management is the core mechanism to guarantee the security of the wireless sensor networks and play a key role in the authentication and encryption.In order to improve the network security performance,a novel scheme-NDDK (dynamic key management for wireless sensor networks based on neighbor discovery) is proposed.In this scheme,the neighbor lists are utilized to construct the topological structure in the initial process,then the key polynomials are assigned to ensure the least hamming distance between the combinations of common polynomial keys in the neighbor nodes.In the node addition and periodical key refreshing processes,cluster head distributes the optimal key combination to the sensor nodes according to the changes of the topological structure.Comparing with the SHELL,the costs is decreased effectively and the security performance is improved.