| 一种双方不可否认密码协议 |
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| 引用本文： | 李艳平 张建中. 一种双方不可否认密码协议[J]. 西安电子科技大学学报(自然科学版), 2004, 31(1): 161-164 |
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| 作者姓名： | 李艳平 张建中 |
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| 作者单位： | (陕西师范大学 数学与信息科学学院, 陕西 西安 710062) |
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| 基金项目： | 国家自然科学基金资助项目(10271069)，陕西省自然科学基础研究计划项目(2002A03)，陕西师范大学重点科研项目 |
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| 摘 要： | 分析了已有的国内外各种不可否认协议，针对它们存在的共同缺点，提出一个更为完善的密码协议：可运行在不安全信道上实现交易的公平性与通信双方的不可否认性；避免了可信第三方与通信方共享密钥，且保证传递数据的机密性与收发方交易的隐私权；尽量减少可信第三方的工作量和负担，避免了其可能成为系统瓶颈的问题. 协议是安全有效的.
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| 关 键 词： | 欺诈 不可否认 可信第三方 证书中心 |
| 文章编号： | 1001-2400(2004)01-0161-04 |
An undeniable cryptographic protocol for both the sender and the receiver |
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| LI Yan-ping,ZHANG Jian-zhong. An undeniable cryptographic protocol for both the sender and the receiver[J]. Journal of Xidian University, 2004, 31(1): 161-164 |
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| Authors: | LI Yan-ping ZHANG Jian-zhong |
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| Affiliation: | (College of Mathematics and Information Science, Shaanxi Normal Univ., Xi'an 710062, China) |
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| Abstract: | We survey the state of non-repudiation cryptographic protocols, almost all of which have weaknesses. The paper proposes a perfect protocol which can be used to realize the strong fairness and non-repudiation of both parties even if the channels are not reliable. Usually the protocol only needs three interactions of participants and the transferring data remain confidential for others but the sender and the receiver, who are unknown to others. The Trusted Third Party(TTP) acts as a notary rather than a delivery and its bottleneck problem is solved completely. Finally the security of the protocol is analysed in detail. |
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| Keywords: | cheating undeniable trusted third party certificate authority |
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