%0 Journal Article
%T 满足可控关联性的合作群签名方案<br>Cooperative group signature scheme with controllable linkability
%A 柳欣
%A 徐秋亮
%A 张波&lt
%A br&gt
%A LIU Xin
%A XU Qiu-liang
%A ZHANG Bo
%J 山东大学学报（理学版）
%D 2016
%R 10.6040/j.issn.1671-9352.0.2016.003
%X 摘要： 已有的满足可控关联性的群签名方案(简称GS-OL方案)并未考虑群成员私钥有可能泄露和单一打开权威可能会损害用户隐私的问题。而且,此类方案在用户端运算效率方面尚存在改进空间。为此,对已有的GS-OL方案安全模型做出扩展,并提出效率更高的改进方案。新方案借助无双线性对的Boneh-Boyen签名技术使得用户端免于执行低效的对运算,利用合作群签名技术解决了群成员私钥泄露问题,并且利用分布式密钥产生、同时执行的零知识证明和关于“掌握给定元素的群同态前像”的分布式零知识证明等技术实现了对打开权威权利的分享。此外,基于新的GS-OL方案构造了一个实用的匿名订购系统。与已有同类系统相比,新系统同时满足允许令牌过期作废和支持隐私保护数据挖掘等多个实用性质,而且在用户端运算效率方面具有显著优势。<br>Abstract: The existing group signature schemes with controllable linkability(abbreviated as GS-OL)suffer from the following two deficiencies, i.e., group members’ private keys are likely to leak and the Open Authority may harm users’ privacy. Moreover, there is still room for improvement in the computational efficiency of users. To correct this situation, an extension of the existing GS-OL security model was made, and an improved scheme with higher efficiency was provided. By using the Boneh-Boyen signature scheme without pairings, the users were liberated from performing expensive pairing computations. Borrowing the ideas of cooperative group signatures, the problem of private key leakage of group members was also solved. Moreover, in order to decentralize the Open Authoritys power, the technique of distributed key generation, committed zero-knowledge proof of knowledge, and distributed proof of knowledge of preimages of group homomorphism were incorporated in the new scheme. In addition, a practical anonymous subscription system based on the new GS-OL scheme was proposed. Compared with previous systems, the new system meets several practical properties such as allowing customers’ tokens to expire and supporting privacy-preserving data mining, and it has obvious advantage in users’ operational efficiency
%K 合作群签名
%K 隐私保护数据挖掘
%K 分布式零知识证明
%K 匿名订购
%K &lt
%K br&gt
%K distributed zero-knowledge proof
%K privacy preserving data mining
%K anonymous subscription
%K cooperative group signature
%U http://lxbwk.njournal.sdu.edu.cn/CN/10.6040/j.issn.1671-9352.0.2016.003