| 对一个无证书盲签名方案的攻击与改进 |
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| 引用本文： | 何俊杰,王娟,祁传达.对一个无证书盲签名方案的攻击与改进[J].数学的实践与认识,2014(4). |
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| 作者姓名： | 何俊杰 王娟 祁传达 |
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| 作者单位： | 信阳师范学院数学与信息科学学院; |
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| 基金项目： | 国家自然科学基金(61272465);河南省自然科学基金(102102210242,122400450189) |
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| 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.
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| 关 键 词： | 无证书密码学 盲签名 双线性对 公钥替换攻击 |
Attack And Improvement of A Certificateless Blind Signature Scheme |
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| Abstract: | 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,g-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. |
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| Keywords: | certificateless cryptography blind signature bilinear pairing public key replacement attacks |
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