Abstract: To tackle the problems of poor network scalability, low network connectivity and large storage overhead to the existing wireless sensor networks, based on the clustering wireless sensor networks, a unital-based new key pre-distribution management scheme which provides good network scalability also has a high network connectivity is proposed. The scheme uses a third-party service nodes as the base station to complete the communication between the cluster head and uses the new scheme to complete the communication between the cluster head and the cluster member. The analysis and calculation results verify the effectiveness of the new management scheme compared to existing schemes at equal network size.

Key words: wireless sensor networks, unital design principle, key management, network scalability, network connectivity

摘要： 针对现有无线传感器网络密钥管理方案的网络可扩展性差、连通率低和存储开销大等问题，在分簇结构无线传感器网络基础上，根据单位设计原理，提出了一种具有较强网络可扩展性同时具有较高网络连通率的新的密钥预分配方案。方案中，簇头间采用了以基站作为第三方服务节点来完成通信，簇头与簇内节点间通信采用新方案。在相同网络规模的情况下，与现有方案相比，分析和计算结果验证了新方案具有较好的可扩展性同时有较高的连通性。

关键词: 无线传感器网络, 单位设计原理, 密钥管理, 网络可扩展性, 网络连通性