| 一种门限代理签名方案的安全性分析及改进 |
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| 引用本文： | 张磊,亢保元. 一种门限代理签名方案的安全性分析及改进[J]. 山东理工大学学报：自然科学版, 2009, 23(1) |
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| 作者姓名： | 张磊 亢保元 |
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| 作者单位： | 中南大学数学科学与计算技术学院 |
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| 摘 要： | 对Hu等人改进的一种门限代理签名方案(J-H-J-Z方案)进行了安全性分析,发现该方案存在漏洞,容易受到证书攻击:伪造原始签名人,并且不具备不可否认性.针对以上问题对该方案进行了改进,改进后的方案克服了原方案的特点,提高了系统的安全性,并保留了原方案的一些优点.
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| 关 键 词： | 零知识证明 门限签名 证书攻击 合谋攻击 |
Cryptanalysis and improvement of a thredshold proxy signature scheme |
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| ZHANG Lei,KANG Bao-yuan. Cryptanalysis and improvement of a thredshold proxy signature scheme[J]. Journal of Shandong University of Technology:Science and Technology, 2009, 23(1) |
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| Authors: | ZHANG Lei KANG Bao-yuan |
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| Affiliation: | School of Mathematical Sciences and Computing Technology;Central South University;Changsha 410075;China |
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| Abstract: | Through the cryptanalysis of a improved thredshold proxy signature scheme presented by Hu,it is found that this scheme has security leaks,easily attacked by warrant:forge the original signer.It dose not satisfy the nonrepudiation.A new improved scheme was proposed.The security flaws of original scheme can be overcome,improving the security of the system and retaining some merits of the original scheme. |
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| Keywords: | zero-knowledge proof threshold signature warrant attack collusion attack |
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