在Gentry所提出的基于证书加密概念的基础上,构造一个高效的基于证书的短签名方案。方案使用证书作为用户临时签名密钥的一部分,有效简化了证书的管理,克服了证书的发布和密钥托管问题。所提方案在签名产生阶段不需要任何双线性对运算,在签名验算阶段也仅需要一个双线性对运算。因此,方案具有更短的签名长度、更少的计算代价和更高的执行效率。
Based on the certificate-based encryption notion given by Gentry, we construct an efficient certificate-based short signature scheme. The scheme uses the certificate as part of user' s temporary signing key, which simplifies the certificate management efficiently, and solves the problems of certificate release and key escrow. The proposed scheme does not require any bilinear pairing operations in the stage of signature generation, while requires just one bilinear pairing operation in verification stage. Therefore, our scheme enjoys shorter signature length, less running time and operation cost.