一种基于多项式的代理保护代理签名体制研究

A Kind of New Proxy-Protected Signature based on Polynomial Over Finite Fields

文章首先分析了张青坡等人中提出的多项式形式的ElGamal签名体制的安全缺陷,然后基于有限域上多项式的性质,提出了有限域上多项式形式代理保护代理签名方案;新的签名方案中,利用多项式进行签名权利的委托,并由改进的有限域上的多项式形式的ElGamal签名体制生成代理签名。新方案的安全性基于离散对数的难解性。

First we analyze the insecurity of the E1Gamal signature scheme based on polynomial over finite fields proposed by ZHANG Qing-po.Next we present a new proxy-protected proxy signature based on polynomial over finite fields.The new proxy signature scheme use polynomial to delegate the original signature right and use the improved E1Gamal signature scheme based on polynomial over finite fields to generate the proxy signature.The security of the new scheme based on the intractability of discrete logarithm problem.