| 一个代理盲签名方案的安全性分析 |
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| 引用本文： | 何俊杰,孙芳,祁传达a. 一个代理盲签名方案的安全性分析[J]. 计算机应用研究, 2012, 29(5): 1904-1906 |
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| 作者姓名： | 何俊杰 孙芳 祁传达a |
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| 作者单位： | 1. 信阳师范学院数学与信息科学学院,河南信阳,464000
2. 信阳师范学院计算机与信息技术学院,河南信阳,464000 |
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| 基金项目： | 河南省自然科学基金资助项目(102102210242）；河南省教育厅自然科学基金资助项目（12A520034） |
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| 摘 要： | 对柳菊霞等人提出的一种基于离散对数的代理盲签名方案进行了安全性分析,指出方案不满足强不可伪造性和非关联性,为此,提出了一种改进的代理盲签名方案。新方案中,在代理阶段使用授权证书,有效抵抗了原始签名人的伪造攻击;在盲签名阶段增加盲因子,实现了非关联性。分析表明,新方案满足代理盲签名方案的安全性要求,且具有较高的计算效率。
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| 关 键 词： | 代理盲签名 离散对数 伪造攻击 非关联性 授权证书 |
Cryptanalysis of proxy blind signature scheme |
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| HE Jun-jie,SUN Fang,QI Chuan-daa. Cryptanalysis of proxy blind signature scheme[J]. Application Research of Computers, 2012, 29(5): 1904-1906 |
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| Authors: | HE Jun-jie SUN Fang QI Chuan-daa |
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| Affiliation: | a. College of Mathematics & Information Science, b. College of Computer & Information Technology, Xinyang Normal University, Xinyang Henan 464000, China |
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| Abstract: | Cryptanalysis of the proxy blind signature scheme based on DLP which was proposed by Liu et al. showed that the scheme didn't satisfy strongly unforgeability and unlinkability. This paper proposed an improved scheme to overcome these security problems. By using authorized certificate in the stage of proxy designation, it effectively resisted the original signer's forgery attacks; by increaseing the number of blind elements in the stage of blind signing, it satisfied the unlinkability of the new shceme. Analysis result shows that the new shceme satisfies the requirements of proxy blind signature scheme and has high calculating efficiency. |
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| Keywords: | proxy blind signature discrete logarithm forgery attack unlinkability authorized certificate |
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