一种新的盲代理重签名方案

A NOVEL BLIND PROXY RE-SIGNATURE SCHEME

单向代理重签名比双向代理重签名更具有优越性,因为后者可以用两个不同的前者来构成,而前者不能由后者构成。基于代理重签名和盲签名,提出一个单向盲代理重签名方案,能有效保护签名消息的隐私。在标准模型下证明了该方案的安全性,分析表明在计算性Diffie-Hellman假设下该方案能抵抗适应性选择消息攻击。

Unidirectional proxy re-signature schemes are superior to bidirectional schemes,for two former ones can constitute a latter one while several latter ones cannot constitute a former one.Based on proxy re-signature and blind signature,the paper proposes a unidirectional blind proxy re-signature scheme that can effectively protect the privacy of a signed message.With a standard model,the proposed scheme is provably secure against existential forgery on adaptive chosen message attacks under the computational Diffie-Hellman assumption.