使用自认证公钥的盲签密方案

Blind signcryption scheme using self-certified public keys

首次结合自认证公钥技术和盲签密思想,基于双线性对提出了一个新的使用自认证公钥的盲签密方案,并在随机预言机模型下给出了安全性证明。在ECDL和GBDH问题的困难性假设下,该方案被证明是安全的。新方案避免了基于身份密码系统中固有的密钥托管问题,不需要使用任何公钥证书。在计算复杂性方面,所提方案仅仅需要两次双线性对运算,效率非常高。

By merging the concepts of self-certified public key and blind signcryption for the first time, this paper proposed a new blind signcryption scheme from bilinear pairings using self-certified public keys and proved its security in the random oracle model. Proved the scheme to be secure under the hardness of elliptic curve discrete logarithm problem and gap bilinear Dif- fie-ltellman problem. The new scheme overcame the inherent key escrow problem of identity-based cryptography, no public key certificate was required. Moreover, the proposed was efficient since only two pairing operations were required.