| 对一类无证书强代理签名方案的攻击及改进 |
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| 引用本文： | 孙士锋,温巧燕.对一类无证书强代理签名方案的攻击及改进[J].北京邮电大学学报,2010,33(1):80-83. |
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| 作者姓名： | 孙士锋 温巧燕 |
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| 作者单位： | 北京邮电大学,网络与交换技术国家重点实验室,北京,100876;北京邮电大学,网络与交换技术国家重点实验室,北京,100876 |
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| 基金项目： | 国家自然科学基金项目，北京市自然科学基金项目 |
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| 摘 要： | 通过对一类已有的高效无证书强代理签名方案进行分析，给出了该方案所存在的一种替换公钥攻击，指出了该方案存在的安全问题，表明了攻击者可以通过替换原始签名者的公钥伪造代理授权，进而伪造代理签名. 针对该攻击提出了一种改进方案，使其克服了原方案所存在的问题，具有更高的安全性.
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| 关 键 词： | 无证书公钥体制 代理签名 替换公钥攻击 双线性对 |
| 收稿时间： | 2009-5-21 |
| 修稿时间： | 2009-9-28 |
An Attack on a Certificateless Strong Proxy Signature Scheme and Its Improvement |
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| SUN Shi-feng,WEN Qiao-yan.An Attack on a Certificateless Strong Proxy Signature Scheme and Its Improvement[J].Journal of Beijing University of Posts and Telecommunications,2010,33(1):80-83. |
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| Authors: | SUN Shi-feng WEN Qiao-yan |
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| Affiliation: | （State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China） |
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| Abstract: | A proposal of efficient certificateless signature scheme is presented to insecure against public key replacement attack. It is shown that an adversary who replaces the public key of the original signer can forge valid proxy delegations for the corresponding proxy signer without signatures. To thwart this attack, an improved scheme is further proposed, which is not only more securer but also avoids the problems of the original scheme. |
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| Keywords: | certificateless public key cryptography proxy signature public key replacement attack bilinear pairings |
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