密钥管理与密钥生命周期研究

许多系统借助加密技术来保证信息在存储、传输过程中的安全性,而密码系统中所使用的密钥或口令的安全性则成为系统的薄弱环节1]。文章探讨了控制密钥的发布、使用和更新的一些密钥管理技术;介绍了对称加密系统、非对称加密系统、私人密钥和公开密钥等基本概念;讨论了密钥分割法、密钥分层法的基本思想;着重分析了密钥生命周期的各个阶段,最后给出了一种利用密钥分层技术实现保密通信的应用方案。

Research on Key Management and Key Life Cycle Model

By the aid of cryptographic technologies, lots of systems ensure the information security during its storing and transmitting processes. This paper discusses key management techniques for controlling the distribution, use, and update of cryptographic keys; introduces basic concepts of symmetric cryptographic system, asymmetric cryptographic system, symmetric-key, public-key, and so on; discusses the ideas of key dividing and key layering; and focuses on details of key life cycle. In the end, this paper presents an application scheme of key layering in secure communication.