新的标准模型下基于身份的代理签名方案

摘要

A proxy signature scheme entity to delegate its signing capability to another allows an original entity (proxy) in such a way that the proxy one can sign messages on behalf of the delegator. A new identity-based proxy signature scheme was proposed The scheme is existentially unforgeable in the standard model against adaptive chosen message and identity attacks under the Computational Diffie-Hellman assumption. Compared with the known identity-based proxy signature scheme in the standard model.the scheme enjoys less operation.%代理签名是原始签名者将其签名能力授权给代理签名者,从而代理签名者可以代表原始签名者对指定的消息进行签名.提出了一种新的基于身份的代理签名方案,并在标准模型下证明了方案是适应性选择消息和身份攻击下签名存在性不可伪造的,其安全性基于CDH假设是困难的.与现有标准模型下基于身份的代理签名方案相比,新方案的执行效率更高.