Analysis and improvement of ZG off-line TTP non-repudiation protocol

LIU Dong-mei1; QING Si-han 2; LI Peng-fei4; LI Shang-jie1

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Analysis and improvement of ZG off-line TTP non-repudiation protocol

更新时间：2024-10-14

- Analysis and improvement of ZG off-line TTP non-repudiation protocol
- Vol. 30, Issue S2, Pages: 44-51(2009)
- 作者机构：
  
  1. 中国科学院软件研究所基础软件国家工程研究中心
  2. 中国科学院研究生院
  3. 中国科学院软件研究所信息安全技术工程研究中心
  4. 中国科学院综合信息技术国家级重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP393.04
- Published：2009
- 稿件说明：
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LIU Dong-mei1, QING Si-han 2, LI Peng-fei4, et al. Analysis and improvement of ZG off-line TTP non-repudiation protocol[J]. 2009, 30(S2): 44-51.
DOI：

LIU Dong-mei1, QING Si-han 2, LI Peng-fei4, et al. Analysis and improvement of ZG off-line TTP non-repudiation protocol[J]. 2009, 30(S2): 44-51. DOI：

摘要

对ZG离线TTP(trusted third party)公平非否认协议及其一种改进方案进行了分析

针对原协议因引入协议有效期而存在消息延迟攻击的问题以及改进方案存在子协议被滥用的问题

提出2种新的改进方案。2种方案侧重点不同

分别适用于不同的场景

能够保证非否认性和公平性的同时

避免消息延迟攻击和子协议被滥用。第一种方案适合于对协议效率要求比较高

而且协议被滥用不会影响参与协议主体的利益的情况;第二种方案可用于需要防止子协议被滥用的情况。

Abstract

Based on the weakness of ZG off-line TTP（trusted third party） non-repudiation protocol because of using pro-tocol deadline

the improvement of the ZG off-line TTP non-repudiation protocol was given

which eliminated the delay-ing resolve request attack and ensured non-repudiation and fairness.Therefore

two kinds of improvement of ZG off-line TTP non-repudiation protocol were given

which had different point of focus.Among them

the first one could eliminate delaying message attack in ZG protocol;the second one also had the property of preventing the abuse of sub-protocol be-sides eliminating delaying message attack.The first one is suitable for electronic payment and certified email

but the second one is suitable for digital contract signature.

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