| 引用本文: | 郭兴阳,张权,唐朝京.一种动态门限群签名方案的安全性分析.[J].国防科技大学学报,2005,27(4):71-74 ,115.[点击复制] |
| GUO Xingyang,ZHANG Quan,TANG Chaojing.Cryptanalysis of a Dynamic Threshold Group Signature Scheme[J].Journal of National University of Defense Technology,2005,27(4):71-74 ,115[点击复制] |
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| 一种动态门限群签名方案的安全性分析 |
| 郭兴阳1,2, 张权1, 唐朝京1 |
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(1.国防科技大学 电子科学与工程学院，湖南 长沙 410073;2.空军工程大学 电讯工程学院，陕西 西安 710077)
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| 摘要: |
| 门限群签名是群签名的推广，其中只有授权子集才能代表整个群体进行签名。一旦发生纠纷，签名成员的身份可以被追查出来。指出一种动态门限群签名方案有冗余，提出了针对该签名三种攻击。分析结果证明该门限群签名方案不具有防冒充性，不能抵抗合谋攻击，门限的动态更新、群成员注销和系统密钥更新也不安全。 |
| 关键词: 数字签名 门限群签名 可追查性 防冒充性 |
| DOI： |
| 投稿日期：2005-04-23 |
| 基金项目:国家自然科学基金资助项目(60472032、60372039) |
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| Cryptanalysis of a Dynamic Threshold Group Signature Scheme |
| GUO Xingyang1,2, ZHANG Quan1, TANG Chaojing1 |
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(1.College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073，China;2.College of Telecommunication Engineering, Air Force Engineering University, Xi'an 710077，China)
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| Abstract: |
| The threshold group signature is a generalization of group signature, in which only authorized subset can represent the group to generate signature and the identities of signers of a signature can be opened in case of later dispute. We point out the redundancy of a dynamic threshold group signature scheme and demonstrate three attacks on it. The security analysis indicates that the scheme is not secure against framing attack and cannot resist conspiratorial attack and the threshold value cannot be renewed safely. |
| Keywords: digital signature threshold group signature traceability security against framing attack |
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