This paper describes the threats among the network, analyzes the security strategy of the SNMPv2 and presents a scheme in which the public key cryptosystem is used to distribute the key of symmetric cryptosystem to improve the security of the SNMPv2.

• 针对网络环境中存在的各种威胁，分析了SNMPv2的安全性策略，并基于SNMPv2设计了一个采用公开钥密码系统来分配常规密码体制密钥的方案以进一步增强SNMPv2的安全性