The key management server of key management subsystem assumes the core function of key management . it offers the retraction and filing etc . the server cipher machine ensures the safety generation and safety issuing of the keys 密钥管理子系统中的密钥管理服务器承担了密钥管理的核心功能，同时提供了撤消、归档等功能，服务器密码机保证了用户密钥的安全产生和安全分发。
