这个密钥与由客户端所生成的通用密钥相同。
This key is the same as the common key generated by the client.
对话密钥使用前面已经生成的通用密钥来进行加密。
The conversation key is encrypted using the common key, which has been generated above.
在生成通用密钥之后，keyserver程序将随机生成一个对话密钥。
After generating a common key, the keyserver program randomly generates a conversation key.
应用推荐