为了提高基于身份的密码系统的效率,提出了分层的基于身份的密码系统。分层的基于身份的签名是其重要组成部分。首先叙述了分层的基于身份的签名的定义和安全模型;然后分析了几个分层的基于身份的签名方案的构造方法、安全性和执行效率;最后指出了其下一步的研究方向。
This paper proposed the hierarchical identity-based cryptosystem in order to improve the efficiency of the identity- based cryptosystem. Additionally, the hierarchical identity-based signature is an important part of the hierarchical identity- based cryptosystem. At first, described the definition and the security model of a hierarchical identity-based signature scheme. Secondly, introduced several hierarchical identity-based signature schemes. And analyzed the construction, security and effi- ciency of the schemes. Finally, pointed out the development trend and study direction of hierarchical identity-based signature schemes.