摘要
根据Waters提出的基于身份的加密方案,设计一个分层的基于身份的签名方案,并利用计算Diffie-Hellman问题的困难性在标准模型下证明了方案的安全性.目前,对于分层的基于身份的签名方案来说,有些方案的安全性证明是在随机预言模型下进行的,有些方案的安全性证明是基于强的困难假设进行的.因此,与这些方案相比,本文方案的安全性比较高.
This paper presents a hierarchical identity based signature scheme from a modification of Waters＇ proposed identity based encryption scheme. The scheme＇ s security is proven in the standard model and rests on the hardness of the computational Diffie-Hellman problem in groups equipped with a pairing. At present, the security of the hierarchical identity based signature schemes is proven either in the random oracle model or based on the strong complexity assumption. Therefore, the scheme that this paper puts forward is more secure than the existing schemes.
出处
《小型微型计算机系统》
CSCD
北大核心
2008年第8期1411-1414,共4页
Journal of Chinese Computer Systems
基金
国家自然科学基金资助项目(90412012)资助
