轻量级门限群签名方案的改进  

Improvement of lightweight threshold group signature scheme

作　　者：竺智荣 吕佳玉 叶帼华 姚志强 ZHU Zhirong;LYU Jiayu;YE Guohua;YAO Zhiqiang(School of Mathematics and Information,Fujian Normal University,Fuzhou 350117,China;Fujian Engineering Research Center of Public Service Big Data Mining and Application,Fuzhou 350108 China)

机构地区：[1]福建师范大学数学与信息学院,福建福州350117 [2]福建省公共服务大数据挖掘与应用工程技术研究中心,福建福州350108

出　　处：《网络与信息安全学报》2020年第4期120-129,共10页Chinese Journal of Network and Information Security

基　　金：国家自然科学基金(61872090,61972096)。

摘　　要：为了提高门限群签名在5G环境下的安全性和效率,提出一个新的解决方案。核心思想是通过引入消息令牌和动态身份,提高认证信息的新鲜性,加大敌手攻击难度;同时精简参与各方的交互次数,并将部分计算任务迁移至服务器,减少成员部分计算开销。经过安全分析,所提方案可抵抗包括重放攻击在内的多种攻击;经过性能分析,所提方案比同类方案减少了两次与可信中心的交互,签名占用空间缩小30%,具有更短的执行时间,适用于5G网络下的资源受限设备。In order to improve the security and efficiency of threshold group signature in 5G environment,a new scheme was proposed.The core idea was to introduce message token and dynamic identity to improve the freshness of authentication information and increase the difficulty of enemy attacks.At the same time,the number of interactions between the participating parties was simplified,and some computing tasks were migrated to the server to reduce the computing overhead of the member part.After security analysis,the proposed scheme can resist multiple attacks including replay attack.After performance analysis,the proposed scheme can reduce the interaction with the trusted center twice compared with similar schemes,reduce the signature space by 30%,and have shorter execution time,which is suitable for resource-constrained devices under 5G network.

关 键 词：门限群签名 5G网络 轻量级 重放攻击 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]