基于身份的代理盲签名方案的分析与改进  

Analysis and Improvement of Identity-based Proxy Blind Signature Scheme

作　　者：薛朝奎[1] 龙士工[2] 

机构地区：[1]毕节学院数学与计算机科学学院,毕节551700 [2]贵州大学计算机科学与信息学院,贵阳550025

出　　处：《计算机与数字工程》2012年第6期67-69,共3页Computer & Digital Engineering

基　　金：国家自然科学基金(编号:61163001)资助

摘　　要：通过对一种基于身份的代理盲签名方案的分析,指出该方案并不满足不可伪造性和不可连接性,代理人通过计算原始签名人的私钥,可以伪造原始签名人的签名或授权;当代理盲签名信息公开后,代理签名人经过分析计算自己已知信息,得知该方案不满足不可连接性,即盲性。在此基础上通过引入随机数和增加参数的方法,提出了一种基于身份的代理盲签名方案,克服了原方案存在的安全缺陷,并且保留了原方案的其它优点。The identity-based proxy blind signature scheme is analyzed,and it is found that the scheme does not possess the unforgeability property and unlinkability property.Because the proxy signer can recover the original signer＇s private key,one can forge the signing capabilities or authorized capabilities of the original signer.When proxy blind signature information is public,the proxy signer calculated through analysis of their known information,that the scheme does not possess the unlinkability property that is blind property.On this basis,by the method of the introduction of random numbers and increased parameters,an identity-based proxy blind signature scheme is proposed,which can resolve the security flaws of the original scheme,and retains other merit of the original scheme.

关 键 词：代理盲签名 基于身份 不可伪造性 不可连接性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]