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计算机工程 ›› 2012, Vol. 38 ›› Issue (2): 144-145. doi: 10.3969/j.issn.1000-3428.2012.02.046

• 安全技术 • 上一篇    下一篇

一种前向安全的代理重签名方案

邓宇乔   

  1. (广东商学院数学与计算科学学院,广州 510320)
  • 收稿日期:2011-05-16 出版日期:2012-01-20 发布日期:2012-01-20
  • 作者简介:邓宇乔(1980-),男,博士,主研方向:密码学,安全电子支付系统,数字版权管理系统
  • 基金资助:
    广东商学院博士基金资助项目(10BS41302)

Forward Secure Proxy Re-signature Scheme

DENG Yu-qiao   

  1. (College of Mathematics and Computer Science, Guangdong University of Business Studies, Guangzhou 510320, China)
  • Received:2011-05-16 Online:2012-01-20 Published:2012-01-20

摘要: 基于二次剩余问题求解的困难性,提出一个具有前向安全性的代理重签名方案,通过半可信代理方,将代理者对消息的签名转化为委托者对同一消息的签名。理论分析结果证明,该方案能抵抗伪造攻击,即使当前周期的签名密钥被泄露,也不会影响此周期前签名的有效性。

关键词: 二次剩余问题, 代理重签名, 前向安全性, 强RSA假定, 数字签名

Abstract: Based on the difficulty in solving quadratic residues problem, this paper proposes a forward secure proxy re-signature scheme. Through a semi-trusted proxy, proxy’s signature on a message is transformed into consignor’s signature on it. Theroy analysis proves that the scheme can resist forgery attack, and it can maintain the security of former signature even if signature key of current cycle leaks.

Key words: quadratic residues problem, proxy re-signature, forward security, strong RSA assumption, digital signature

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