通过对何俊杰等人提出的一个基于离散对数代理盲签名方案进行分析,从中发现该方案会引起原始签名人的公钥替换攻击。为了解决该方案的安全缺陷,提出了一种新的改进方案。分析表明,改进后的新方案可以抵抗原始签名人的公钥替换攻击,并且在基于离散对数问题下保证了代理盲签名的所有安全性要求,而且提高了效率。Through the cryptanalysis of a proxy blind signature scheme based on DLP proposed by He Jun-jie,this paper found that this scheme can cause the public replacement attack.To avoid these attacks,this paper proposed a new improved scheme.Analysis result shows that the new improved scheme can resist the original signer's public key replacement attack.It satisfies all the security requirements of proxy blind signature based on the DLP problems and improve the computation efficiency.国家自然科学基金资助项目(11261060); 福建省自然科学基金资助项目(2012J01022); 新疆研究生科研创新资助项目(XJGRI2013130
