摘要
针对目前基于身份的盲签名方案或者安全性不高,或者效率较低的缺陷,通过密码学分析和算法结构设计,首先提出了一个基于身份的无可信私钥生成中心(PKG)、只有一个对运算的签名方案;然后基于该方案提出了一个基于身份的无可信PKG、只有一个对运算的盲签名方案,并证明了方案的强盲性和不可伪造性,比较了方案与其他类似方案的效率。该方案可以抵抗适应性选择消息和身份攻击,抵抗不可信PKG的攻击,其安全性依赖于强l-SDHP难题。
Current identity-based blind signature scheme or the security is not high,or less efficient.Aiming at the defect,through analysis for cryptography and algorithm design,this paper firstly presented an ID-based signature scheme with only one bilinear pairing without trusted PKG.Then based on the scheme,it presented an ID-based blind signature scheme with only one bilinear pairing without trusted PKG,whose strong blindness and unforgeability had been proved.The scheme had also been proved to be secure against existential forgery on adaptively chosen message and ID attack and against attack from un-trusted PKG,and be more efficient.Its security relied on the hardness of l-SDHP.
出处
《计算机应用研究》
CSCD
北大核心
2012年第2期626-629,共4页
Application Research of Computers
基金
成都市2007年科技攻关资助项目(07GGYB050GX-010)
关键词
私钥生成中心
盲签名
双线性对
不可伪造性
强l-SDHP难题
private key generator（PKG）
blind scheme
bilinear pairing
unforgeability
l-strong Diffie-Hellman problem（l-SDHP）
