Abstract: This paper constructs a kind of provably secure group signature scheme with authorization based on the BMW’s scheme. 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, it strengthens group signature scheme with authorization characteristic, which makes group signature application in electronic business and electronic politics further step.

Key words: group signature, authorization, electronic business

摘要： 在BMW方案的基础上构建可证明安全性的具有权限特性的群签名方案。该方案与BMW方案的不同点在于，群签名方案的密钥生成算法中加入权限生成算法，虽然群签名方案的实例生成速度降低，但为群签名方案添加权限特性，使得群签名在电子商务与电子政务中的应用得以进一步加强。

关键词: 群签名, 权限, 电子商务

CLC Number: 

• TP309