摘要
基于离散对数问题提出一个无证书前向安全代理签密方案,和其他相似方案相比,本方案克服基于身份密码体制中的密钥托管问题和PKI密码体制中的证书存在问题,不仅具有不可伪造性、不可否认性、强可识别性和密钥的依赖性等共有性质,同时具有前向安全性、健壮性和真正的可公开验证性等特殊性质:即使签密当前阶段的代理密钥泄漏,攻击者也不能伪造之前的合法签密.
A forward secure certificateless proxy signcryption based on the difficulty of solving discrete logarithm problem is proposed by use of the forward secure characteristic. Compared to other similar scheme, this scheme can avoid the escrow-key in the ID-based cryptosystem and can avoid using certificate in PKI-based cryptosystem. It not only includes some common characteristic such as unforgeability, undeniability, strong distinguishability, the proxy key＇s dependence to the primary secret key. Also, it includes some special characteristic： forward secure, robustness, public verifiability- even the proxy secret key has been stolen, the attacker could not forge the former proxy signcryption. Moreover, the correctness of the signcryption can be proved without the participation of the unsigncryptor.
出处
《淮北师范大学学报（自然科学版）》
CAS
2011年第4期44-48,共5页
Journal of Huaibei Normal University：Natural Sciences
基金
安徽省教育厅自然科学一般项目(KJ2010B059)
安徽科技学院安徽省自然科学基金预研项目(ZRC2011274)
