在传感器网络中有必要应用加密技术对节点间的通信进行保护。基于随机密钥对模型的传感器网络的密钥管理方案(BPKP),实现了包括初始密钥对向量预分配,通信密钥对向量的建立和通信密钥对向量更新。对BPKP的性能分析表明:BPKP具有高网络连通性、高安全性和低耗能的优点。 It is necessary to apply encryption technology in the sensor network to protect the communication between nodes. Based on the Key Management Scheme (BPKP) of sensor network based on random key pair model, the initialization of vector including initial key pair vector, communication key pair vector and communication key pair vector update are realized. The performance analysis of BPKP shows that BPKP has the advantages of high network connectivity, high security and low energy consumption.