对一个无证书代理盲签名方案的分析与改进

Analysis and improvement of a certificateless proxy blind signature

通过对葛荣亮等人提出的无证书代理盲签名方案进行分析,从中发现该方案会引起公钥替换攻击和恶意但是被动的KGC攻击。为了解决此方案的安全性缺陷,提出了一种改进方案。分析表明,改进的新方案满足无证书代理盲签名方案的所有安全性要求,并且拥有与原方案相同的计算效率。

Through the cryptanalysis of a certificateless proxy blind signature scheme proposed by Ge Rong-liang, it find that this scheme can cause the public replacement attack and malicious-but-passive KGC attack. To avoid these attacks, this paper proposed a new improved scheme. Analysis result shows that the new improved shceme satisfies the requirements of proxy blind signature scheme and has the same computational efficiency compared with the original scheme.