| 三个无证书签名方案的密码学分析与改进 |
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| 引用本文： | 周才学. 三个无证书签名方案的密码学分析与改进[J]. 计算机工程, 2012, 38(19): 114-118 |
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| 作者姓名： | 周才学 |
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| 作者单位： | 九江学院信息科学与技术学院,江西九江,332005 |
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| 摘 要： | 分析3个无证书签名方案,指出第1种方案不能抵抗消极不诚实密钥生成中心的攻击,后2种方案不能抵抗公钥替换攻击.通过在部分私钥生成阶段绑定公钥,提高第1种方案的安全性.在签名阶段,利用公钥绑定散列函数将用户公钥与消息绑定,由此弥补后2种方案的安全缺陷.
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| 关 键 词： | 无证书签名 盲签名 分叉引理 公钥替换攻击 密钥生成中心 消极不诚实KGC攻击 积极不诚实KGC攻击 |
| 收稿时间： | 2011-11-14 |
Cryptanalysis and Improvement of Three Certificateless Signature Schemes |
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| ZHOU Cai-xue. Cryptanalysis and Improvement of Three Certificateless Signature Schemes[J]. Computer Engineering, 2012, 38(19): 114-118 |
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| Authors: | ZHOU Cai-xue |
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| Affiliation: | ZHOU Cai-xue(School of Information Science and Technology,Jiujiang University,Jiujiang 332005,China) |
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| Abstract: | This paper analyzes three certificateless signature schemes and points out that the first one can not resist the negative dishonest Key Generation Center（KGC）＇s attack,and the others are insecure under public key replacement attack.The first one is improved by means of binding public key when partial private key is generated,and the others are improved by means of binding public key to hash function. |
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| Keywords: | certificateless signature blind signature forking lemma public key replacement attack Key Generation Center（KGC） negative dishonest KGC＇s attack positive dishonest KGC＇s attack |
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