摘要
基于环签名思想提出一个类似门限群签名的匿名签名方案,解决了门限群签名中管理员权限过大,而环签名又无法追踪签名人身份的问题。与已有的门限群签名方案相比,因保留了环签名的部分特征,新方案具有以下优点:(1)管理员的权限受到控制,必须和签名接收方合作才能共同追踪签名者的身份;(2)能方便更改门限值;(3)方便加入或注销群成员,系统参数只需少量改变。
A threshold group signature scheme is proposed combining the idea of ring signature. This solves the problem that the threshold group manager has the absolute power in revoking the signer's identity, and the unconditional anonymity of ring signature provides chances for the criminals. Comparing to the existing ones, this scheme has following advantages: (1) The right of the group manager is restricted, he can only revoke the identity of the signer with the receiver's co-operation. (2) The threshold value is conveniently changeable. (3) It is easy to add or delete one or more the group members, and the scheme's parameters are changed little.
出处
《科技通报》
2006年第5期681-683,共3页
Bulletin of Science and Technology
基金
国家自然科学基金项目(10271037)
浙江省自然科学基金项目(M103060)
关键词
群签名
环签名
离散对数
group signature
ring signature
discrete logarithm