| 两种代理签名方案的分析与改进 |
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| 引用本文： | 施荣华,汪秋国,胥 磊.两种代理签名方案的分析与改进[J].计算机工程与应用,2007,43(28):127-130. |
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| 作者姓名： | 施荣华 汪秋国 胥 磊 |
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| 作者单位： | 中南大学信息科学与工程学院 长沙410083 |
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| 基金项目： | 国家自然科学基金
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湖南省自然科学基金 |
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| 摘 要： | 对Dai等人的指定接收人的代理签名方案和Xue等人的采用自我认证公钥的门限代理签名方案进行了密码分析,发现它们是不安全的,都不能抵抗伪造攻击。针对这两个方案的缺陷,对其进行了改进,改进后的方案满足了代理签名的安全性要求。
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| 关 键 词： | 代理签名 伪造攻击 安全分析 门限签名 指定接收人签名 |
| 文章编号： | 1002-8331（2007）28-0127-04 |
| 修稿时间： | 2007-06 |
Security analysis and improvement of two proxy sgnature schemes |
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| SHI Rong-hua,WANG Qiu-guo,XU Lei.Security analysis and improvement of two proxy sgnature schemes[J].Computer Engineering and Applications,2007,43(28):127-130. |
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| Authors: | SHI Rong-hua WANG Qiu-guo XU Lei |
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| Affiliation: | School of Information Science and Engineering,Central South University,Changsha 410083,China |
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| Abstract: | In this paper,through the cryptanalysis of Dai et al. designated-receiver proxy signature scheme and Xue et al. threshold proxy signature scheme using self-certified public keys,it is found that these schemes were both insecure against the forgery attack.To eliminate the weakness of two schemes,improved schemes which satisfy the required secure properties of the proxy signature are proposed,respectively. |
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| Keywords: | proxy signature forgery attack security analysis threshold signature designated-receiver signature |
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