中文摘要：

对黄茹芬等提出的一个高效的无证书盲签名方案进行了安全性分析,指出方案不能抵抗公钥替换攻击.为此,提出了一个改进方案.改进方案在随机预言模型和计算Diffie-Hellman（CDH）问题、q-强Diffie-Hellman（q-SDH）问题及逆计算Diffie-Hellman（inv-CDH）问题困难的假设下对适应性选择消息和身份攻击是存在不可伪造的.

英文摘要：

Security analysis of the certificateless blind signature scheme which was proposed by Huang R F et al.showed that the scheme is insecure against public key replacement attack.An improved scheme was proposed.The security of the improved scheme is mainly based on the hardness assumption of Computational Diffie-Hellman,q-Strong Diffie-Hellman and inverse Computational Diffie-Hellman problems in the random oracle model,which is existentially unforgeable against adaptive chosen message and identity attacks.