一种具有权限特性的群签名方案  

A Kind of Group Signature Scheme with Authorization

作　　者：钟军[1] 何大可[1] 

机构地区：[1]西南交通大学信息科学与技术学院,成都610031

出　　处：《计算机研究与发展》2007年第5期748-755,共8页Journal of Computer Research and Development

基　　金：国防科技重点实验室基金项目(51436050404QT2202)

摘　　要：群签名在电子商务与电子政务领域有着广泛的应用.自从1991年第1个群签名方案被提出以来,在过去的15年里,密码学界的研究者们又提出了许多群签名方案.这些方案中有针对群签名方案本身的研究,即提出不同的假设,并在此基础上构建群签名方案;有针对群签名的安全性标准化的研究;还有将群签名同盲签名、前向安全性签名结合在一起构建群盲签名、具有前向安全性的群签名的研究.但到目前为止,没有一篇文章是关于可证明安全性的具有权限特性的群签名方案.在BMW方案的基础上构建了具有权限特性的群签名方案在BMW方案中加入了权限生成算法,虽然实例生成速度降低,但为群签名方案添加了权限特性;并且,对定理2的证明比BMW方案更加简洁.Group signature has a wide application in the field of electronic business and politics. Lots of variant group signature schemes have been invented in the last 15 years. Among them, some research papers are about the group signature itself, which means that new group signature schemes are to be constructed based on find new intractable assumptions; some papers are about the combination of blind signature and group signature, called group blind signature schemes; some papers are about the combination of forward secure signature and group signature, called forward secure group signature schemes. But there is no research papers about the group signature scheme with authorization. In this paper, a new kind of group signature scheme with authorization is constructed based on the BMW＇s scheme, which is a group signature scheme whose security is based on the standard assumption. Compared with BMW＇ s scheme： Adding authorization generation algorithm to key generation algorithm in group signature scheme, although the speed of instance production of group signature scheme slows down, strengthens group signature scheme with authorization characteristic, which promotes group signature application in electronic business and electronic politics; and furthermore, the proof of theorem 2 in this paper is simpler than that of BMW＇s scheme.

关 键 词：群签名 权限 电子商务 完全匿名性 完全可追踪性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]