等级加密体制中的密钥管理研究

分别利用对称加密技术、非对称加密技术以及对称加密与非对称加密结合技术,提出在等级加密下的密钥管理体制,同时对其安全性与效率进行分析.与现有的体制相比,这种体制采用树状模型,其各等级用户之间的密钥通过关系参数连接起来,使得该体制不但适合于一般的等级体制,同时也适合于密钥频繁改变、用户动态变化的应用环境.

Research for Key Management in Cryptosystem for Hierarchy

In this paper, a key management scheme in cryptosystem for hierarchy is proposed using symmetric cryptography technology, asymmetric cryptography technology, symmetric cryptography combined with asymmetric cryptography technology. At the same time, it's security and efficiency are analyzed. Comparing with the exist systems, this scheme adopts tree model, the users of different secure levels contact each other with relation parameters, the system is appropriate for not only the common environments, but also the special environments in which key changes frequently and users change dynamically.