上海大学学报(自然科学版) ›› 2013, Vol. 19 ›› Issue (3): 298-302.doi: 10.3969/j.issn.1007-2861.2013.03.015

• 数理化科学 • 上一篇    下一篇

基于投影矩阵秘密分享方案的安全性注记

王莉1,2, 王卿文1   

  1. 1. 上海大学 理学院, 上海 200444; 2. 杭州师范大学 理学院, 杭州 310012
  • 收稿日期:2012-09-12 出版日期:2013-06-30 发布日期:2013-06-30
  • 通讯作者: 王卿文(1964—), 男, 教授, 博士生导师, 博士, 研究方向为矩阵代数. E-mail:wqw@shu.edu.cn
  • 基金资助:

    国家自然科学基金资助项目(11171205); 上海市自然科学基金资助项目(11ZR1412500)

Note on Cheater Detection in Secret Sharing Scheme Using Projection Matrix

WANG Li1,2, WANG Qing-wen1   

  1. 1. College of Sciences, Shanghai University, Shanghai 200444, China; 2. College of Science, Hangzhou Normal University, Hangzhou 310012, China
  • Received:2012-09-12 Online:2013-06-30 Published:2013-06-30

摘要: 运用有限域上的正交投影矩阵, 对已有的门限秘密分享方案进行安全性分析, 在理论上严格证明了该方案的验证式存在安全漏洞: 任何一个参与者恶意提供伪份额而不被发现的欺骗行为能以不可忽略的概率存在.

关键词: 防欺诈, 秘密分享方案, 投影矩阵, 正交

Abstract: The security deficiency against cheating, which lies in a threshold secret sharing scheme is analyzed with the method of orthogonal projection matrix over finite field. There exists some illicit participant successfully passing the check by his forged shares and reconstructing a wrong secret without being perceived. A strict proof shows that the cheater has non-negligible advantage in above deception.

Key words: detection of cheaters, orthogonal, projection matrix, secret sharing scheme

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