J4 ›› 2010, Vol. 37 ›› Issue (1): 107-112+147.doi: 10.3969/j.issn.1001-2400.2010.01.019

• 研究论文 • 上一篇    下一篇

两个前向安全盲签名体制的安全性分析

邱钢1;王宏2;肖鸿1;肖国镇1
  

  1. (1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安  710071;
    2. 淮北煤炭师范学院 计算机科学与技术学院,安徽 淮北  235000)
  • 收稿日期:2008-10-17 出版日期:2010-02-20 发布日期:2010-03-29
  • 通讯作者: 邱钢
  • 作者简介:邱钢(1968-),女,西安电子科技大学博士研究生,E-mail: gang_qiu@yeah.net.
  • 基金资助:

    国家自然科学基金资助项目(60773121)

Security analysis of two forward-secure blind signature schemes

QIU Gang1;WANG Hong2;XIAO Hong1;XIAO Guo-zhen1
  

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. Dept. of Computer Sci. and Tech., Huaibei Coal Normal College, Huaibei  235000, China)
  • Received:2008-10-17 Online:2010-02-20 Published:2010-03-29
  • Contact: QIU Gang

摘要:

前向安全盲签名能提供重要的安全保证,即使已经完全暴露了当前密钥,也能够形成在入侵之前的秘密密钥和电子签名的安全保护.针对最近由Hui-Feng Huang与Chin-Chen Chang,以及Yali Liu,Xinchun Yin与Juewei Chen分别提出的新的前向安全盲签名方案进行了安全性分析,通过密钥结构分析和困难问题分析成功攻破了该方案,证明了这些方案实际上都不具备前向安全性.

关键词: 密码学, 数据安全, 盲签名, 前向安全性, 密钥暴露

Abstract:

Forward-secure blind signature schemes can provide important security guarantees: all secret keys and digital signatures before current key exposure will still be secure. We make a Security analysis of the recent two new forward-secure blind signature schemes respectively proposed by Hui-Feng Huang et al and Yali Liu et al. These schemes are totally broken by cryptanalysis on the key structure or hardness problem. It is proved that they are not forward-secure.

Key words: cryptography, security of data, blind signature, forward security, key exposure