一种无证书强代理签名方案的设计  

Designing of certificateless proxy signature scheme

作　　者：廖大见[1] 唐元生[1] 

机构地区：[1]扬州大学数学科学学院,江苏扬州225002

出　　处：《扬州大学学报（自然科学版）》2011年第3期66-69,共4页Journal of Yangzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(60971123);江苏省自然科学基金资助项目(BK2008208);江苏省普通高校研究生科研创新计划资助项目(CXLX11-0992)

摘　　要：对某高效无证书代理签名方案进行分析,发现该方案达不到其声称的高效率,而且存在安全隐患.为进一步提高无证书代理签名方案的效率,利用双线性对构造了一个新的无证书代理签名方案,其安全性基于Diffie-Hellman困难问题,证明了新方案满足代理签名的安全性要求,且该方案比前述某高效无证书代理签名方案更为高效.The author analyzes the security of the certificateless proxy signature proposed by Du and Wen etc.It shows that there is still a security defect in the proxy signature.In order to improve the efficiency of the certificateless proxy signature,a new certificateless proxy signature is proposed from bilinear pairings.The security of the new scheme is based on the Computational Diffie Hellman Problem（CDHP）.It shows that this scheme can resist the attack of dishonest original signer and satisfies all the requirements of strong proxy signatures in certificateless public key cryptography.Furthermore,the scheme is more efficient than the scheme proposed by Du and Wen.

关 键 词：无证书公钥密码体制 代理签名 双线性对 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]