去中心基于属性不可否认签名  

Decentralized attribute-based undeniable signature

作　　者：魏亮 黄振杰[1] 陈群山 WEI Liang;HUANG Zhen-jie;CHEN Qun-shan(Fujian Key Laboratory of Granular Computing and Application(Minnan Normal University),Zhangzhou 363000;School of Computer Science,Minnan Normal University,Zhangzhou 363000,China)

机构地区：[1]福建省粒计算及其应用重点实验室(闽南师范大学),福建漳州363000 [2]闽南师范大学计算机学院,福建漳州363000

出　　处：《计算机工程与科学》2020年第6期1003-1011,共9页Computer Engineering & Science

基　　金：福建省自然科学基金(2019J01750);福建省中青年教师教育科研项目(JAT170345,JAT170346)。

摘　　要：将基于属性、不可否认和去中心3个概念相结合,提出去中心基于属性不可否认签名的定义和安全模型,并基于离散对数困难问题构造一个无双线性对的方案。该方案主要基于Cramer等的证据隐藏零知识证明协议,以Schnorr协议作为其基础Σ协议,以Shamir门限方案作为其秘密分享方案;再使用Fiat-Shamir转换得到一个(t,n)门限签名(BTS)方案;然后再对BTS方案进行不可否认、防共谋和去中心化处理;最后得到一个去中心基于属性不可否认签名方案,并在随机预言机模型下证明了其安全性。Combining the concepts of attribute-based,undeniability and decentralization,a new concept of decentralized attribute-based undeniable signature with formal security model is proposed,and a concrete non-bilinear pair scheme based on discrete logarithm difficulty problem is constructed.The scheme uses the witness-hiding zero-knowledge proof protocol proposed by Cramer et al.And the Schnorr protocol as the basicΣprotocol,and uses the Shamir threshold scheme as its secret sharing scheme.Then,Fiat-Shamir transformation is used to obtain a(t,n)threshold signature(BTS)scheme.Then,undeniability,anti-collusion,and decentralization are performed on the BTS scheme.Finally,a decentralized attributes-based undeniable signature scheme is obtained,and its security is proved under the random oracle model.

关 键 词：数字签名 基于属性签名 不可否认签名 去中心 随机预言机模型 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]