基于椭圆曲线的不需要可信方的匿名代理签名方案

Anonymous Proxy Signature Scheme without Trusted Party Based on Elliptic Curve

对Gu方案进行密码学分析,发现该方案不具有强不可伪造性,且由于基于离散对数问题,实现效率不高,数据冗余量大。基于椭圆曲线公钥密码体制(ECC)构造了一个新的不需要可信方的匿名代理签名方案,并对新方案的各项基本性质进行了具体分析。新方案具有强不可伪造性,且签名结果不含冗余数据,安全性高,实现速度快,具有更好的实际应用前景。

It is found that the Gu scheme has not got the property of strong unforgeability and low implementation efficiency and redundant data of the construction of discrete logarithm problem. This paper proposed a new anonymous proxy signature scheme without trusted party based on ECC, and analyzed the essential security characters it has. It shows that the new scheme can keep the property of the unforgeability and does not have the redundant data in signature. It also has the quality of high security and high efficiency of implementation.