无线传感器网络系统所处的环境通常比较特殊,使得其网络节点间用于安全通信的密钥容易被破解,这样就会出现威胁网络系统安全的密钥泄露跨区域传递问题KLTP。文中分析了KLTP的产生过程以及危害,并提出部署知识的增强型随机密钥预分布协议IRKPP,并通过仿真实验和数据分析表明IRKPP协议具有很高的可扩展性,并能使网络保持很高的连通度,极大地降低了KLTP带来的危害。 Wireless sensor network systems are usually in a rather special environment, which makes the keys used for secure communication between network nodes easy to be cracked. In this way, the problem of cross-area transfer of keys that threaten the security of the network system occurs. In this paper, the generation process and the harm of KLTP are analyzed and an enhanced random key pre-distribution protocol (IRKPP) is proposed. The simulation results and data analysis show that the IRKPP protocol is highly scalable and keeps the network high Connectivity, greatly reducing the harm caused by KLTP.