指定验证方的门限验证匿名代理签名方案  

A Proxy Signature with Proxy Signer Privacy Protection for Specified Threshold Verifiers

作　　者：鲁荣波[1] 何大可[1] 王常吉[2] 

机构地区：[1]西南交通大学信息安全与国家计算网格实验室 [2]中山大学计算机科学系,广东广州510275

出　　处：《中国铁道科学》2007年第2期110-114,共5页China Railway Science

基　　金：国家自然科学基金资助项目(60503005);湖南省自然科学基金资助项目(03JJY6017);湖南省教育厅资助项目(03c327)

摘　　要：将指定验证方概念引入匿名代理签名中,提出1个具有指定验证方的门限验证匿名代理签名方案。原始签名人授权给代理签名人,代理签名人的身份除对原始签名人外是保密的,代理签名人可以代表原始签名人产生指定验证方的签名,只有指定验证方才能够验证代理签名的有效性,但无法确定代理签名人的身份,出现争议时指定验证方可以通过原始签名人揭示代理签名人的真实身份,而这个过程不需要可信中心参与。该方案满足匿名性、不可伪造性、不可否认性、匿名性撤销等其他安全性需求,解决了代理签名的定向问题,防止了代理签名权利的滥用,保护了代理签名人的隐私和利益。The concept of specified verifiers is first introduced into the proxy signature with proxy signer privacy protection. A proxy signature with proxy signer privacy protection for specified threshold verifiers is proposed by introducing the anonymity into the designated-verifier proxy signature in this paper. On the one hand, the new scheme can protect the proxy signers privacy against the other third parties except the original signer. On the other hand, the proxy signer can generate the specified verifier signature on behalf of the original signer, only the specified verifier can validate the proxy signature, but the specified verifier cannot confirm the identity of the proxy signer. The specified verifier can unveil the identity of the proxy signer via the original signer without the trust center involved when the dispute exists. The security requirements such as anonymity, unforgeability, non-repudiation and privacy revocation are proved to be satisfied in the new scheme. The new scheme can settle the directionalism to avoid the abuse of proxy signature and meanwhile can protect the proxy signer＇s privacy and profit successfully.

关 键 词：匿名代理签名 指定接收方代理签名 门限验证 代理签名 网络安全 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]