基于群签名和同态加密的联盟链隐私保护方案  

Privacy Protection Scheme of Consortium Blockchain Based on Group Signature and Homomorphic Encryption

作　　者：张学旺[1] 张豪 姚亚宁 付佳丽 ZHANG Xuewang;ZHANG Hao;YAO Yaning;FU Jiali(School of Software Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学软件工程学院,重庆400065

出　　处：《信息网络安全》2023年第3期56-61,共6页Netinfo Security

基　　金：重庆市自然科学基金重点项目[cstc2019jcyj-zdxm0008];南充市科技计划项目[21YFZJ0033];渝北区大数据智能化科技专项重点项目[2020-02]。

摘　　要：为解决联盟链应用中用户身份隐私暴露问题,文章提出一种基于群签名和同态加密的联盟链隐私保护方案。该方案基于秘密共享算法改进群签名中单个群管理员机制,多个群管理员共同保管群私钥;基于同态加密算法协同多个群管理员产生仅群成员可知的成员私钥。与现有方案对比分析表明,该方案具有较强的匿名性、防伪造性,可有效抵抗群管理员的陷害攻击。仿真实验表明,该方案的时间开销在可接受范围之内。In order to solve the problem of user’s identity privacy exposure in the consortium blockchain application,this paper proposed a consortium blockchain privacy protection scheme based on group signature and homomorphic encryption,which improved the single group administrator mechanism in the group signature based on the secret sharing algorithm and set multiple group administrators to keep the group private key together.Based on the homomorphic encryption algorithm,multiple group administrators worked together to generate member private keys that were known only to group members.Through comparison and analysis with existing schemes,this scheme has strong anonymity,anti-forgery,and can effectively resist the active trapping attack of group administrators.Finally,simulation experiments show that the time overhead of this scheme is within the acceptable range.

关 键 词：联盟链 群签名 秘密共享 同态加密 隐私保护 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]