基于离散对数的代理盲签名

A Proxy Blind Signature Scheme Based on DLP

针对文献[4]中代理盲签名方案的缺陷,提出了一种改进的新方案。该方案在代理授权过程中克服了代理签名密钥的可伪造因素,使其安全性等价于解离散对数难题;在盲签名过程中通过引入三个随机数构造了强盲签名。与原方案相比,新方案在真正意义上实现了电子交易中的强不可伪造性和不可链接性,保护了代理签名人的利益和代理交易内容的私密性,有效地防止了交易双方事后抵赖。

Aiming at the drawbacks of proxy blind signature scheme, we propose a new improved proxy blind signature scheme to overcome the forgery factors. In the blind signature, a strong blind signature is constructed with three random factors. It has really completed unforgeablity and unlinkability in the electronic tractions of business in contrast against the previous ones.