可证安全的部分盲代理重签名方案  

Partially blind proxy re-signature scheme with proven security

作　　者：杨小东 陈春霖 杨平 安发英 麻婷春 王彩芬 

机构地区：[1]西北师范大学计算机科学与工程学院,甘肃兰州730070 [2]密码科学技术国家重点实验室,北京100878

出　　处：《通信学报》2018年第2期65-72,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61662069);中国博士后科学基金资助项目(No.2017M610817);甘肃省科技计划基金资助项目(No.1506RJZA130);兰州市科技计划基金资助项目(No.2013-4-22);西北师范大学青年教师科研能力提升计划基金资助项目(No.WNU-LKQN-14-7)~~

摘　　要：针对盲代理重签名的匿名性和可控性问题,借鉴部分盲签名的设计思想,引入部分盲代理重签名的概念,并给出了部分盲代理重签名的安全性定义。基于改进的Shao方案,构造一种标准模型下的双向盲代理重签名方案,允许在最终的重签名中添加受托者和代理者协商的公共信息,不仅实现了签名从受托者到代理者之间的透明转换,保护重签名消息的隐私,还能防止受托者对重签名的非法使用。分析结果表明,新方案满足正确性、多用性、部分盲性和不可伪造性,其性能更适用于电子政务数据交换、跨域身份认证等系统。In order to solve the problem of anonymity and controllability of blind proxy re-signature, the concept of par-tially blind proxy re-signature was introduced by using the idea of partially blind signature. Furthermore, the security definition of partially blind proxy re-signature was also given. Based on the improved Shao scheme, a partially blind proxy re-signature scheme in the standard model was proposed. The proposed scheme allows proxy to add some public information negotiated by delegatee and proxy to re-signature. The scheme not only can achieve the transparent signature conversion from delegatee to proxy and protect privacy of message re-signed by proxy, but also prevented illegal use of re-signature. Analysis results show that the proposed scheme is correct, multi-use, partially blind and existentially un-forgeable. It is more suitable for e-government data exchange system, cross-domain authentication system and so on.

关 键 词：部分盲代理重签名 不可伪造性 多用性 标准模型 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]