标准模型下基于身份的多代理多签名方案  

Identity-Based Multi-Proxy Multi-Signature Scheme in Standard Model

作　　者：王霏 陈明[1] WANG Fei;CHEN Ming(School of Mathematics and Computer Science,Yichun University,Yichun,Jiangxi 336000,China)

机构地区：[1]宜春学院数学与计算机科学学院

出　　处：《计算机工程与应用》2019年第18期67-74,共8页Computer Engineering and Applications

基　　金：国家自然科学基金（No.61662083）

摘　　要：现有基于身份的多代理多签名方案要么缺乏形式化的安全证明,要么在随机预言模型下可证明安全。但是随机预言模型依赖现实世界无法实现的随机预言机,而标准模型不采用随机预言机,能实现完全透明的安全模拟。以Paterson的签名机制为基础,该文提出一种新的基于身份多代理多签名方案,并且结合(多)代理(多)签名敌手模型和Paterson定义的标准安全模型,定义了基于身份多代理多签名的标准模型。在此模型下,新方案的安全性被规约为多项式时间敌手求解计算Diffie-Hellman问题,实现了可证明安全性。There are a few Identity-Based Multi-Proxy Multi-Signature(IBMPMS)schemes in literatures.Some of them have no acceptable formal security proof,others are proven security in the random oracle model.But the random oracle model depends on a random oracle that cannot be implemented in the real world,while security game of the standard model is fully transparent.Based on the Paterson-signature scheme,a new IBMPMS scheme is put forwards.Combined the adversary models of(multi-)proxy(multi-)signature and the standard model proposed by Paterson,a standard model for IBMPMS schemes is defined.In the standard model,the security of the new IBMPMS scheme is deduced to a polynomial time adversary solving computational Diffie-Hellman problem,which indicates that the new IBMPMS scheme achieves provable security in the standard model.

关 键 词：基于身份密码学 多代理多签名 计算DIFFIE-HELLMAN问题 标准模型 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]