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计算机工程 ›› 2013, Vol. 39 ›› Issue (4): 177-179. doi: 10.3969/j.issn.1000-3428.2013.04.041

• 安全技术 • 上一篇    下一篇

前向安全的指定验证者代理签名方案

崔 涛1,刘培玉1,2,王 珍1,李凤银2   

  1. (1. 山东师范大学信息科学与工程学院,济南 250014;2. 山东省分布式计算机软件新技术重点实验室,济南 250014)
  • 收稿日期:2012-05-09 出版日期:2013-04-15 发布日期:2013-04-12
  • 作者简介:崔 涛(1987-),男,硕士研究生,主研方向:数字签名,网络信息安全;刘培玉,教授;王 珍,硕士研究生;李凤银,博士研究生
  • 基金资助:
    国家自然科学基金资助项目(60873247);山东省自然科学基金资助项目(ZR2009GZ007)

Forward Secure Designated Verifier Proxy Signature Scheme

CUI Tao 1, LIU Pei-yu 1,2, WANG Zhen 1, LI Feng-yin 2   

  1. (1. School of Information Science and Engineering, Shandong Normal University, Jinan 250014, China; 2. Shandong Provincial Key Laboratory for Novel Distributed Computer Software Technology, Jinan 250014, China)
  • Received:2012-05-09 Online:2013-04-15 Published:2013-04-12

摘要: 针对指定验证者代理签名中的密钥泄漏问题,提出一种前向安全的指定验证者代理签名方案。引入前向安全的思想,将整个签名的有效时间分为T个时间段,公钥始终保持不变,私钥则随时间的推进不断更新。实验结果表明,该方案能提高效率,并且能保证即使在代理签名者当前时段的签名私钥被泄露,敌手也不能成功伪造此时段之前的代理签名,从而减小密钥泄漏带来的损失。

关键词: 前向安全, 指定验证者, 数字签名, 代理签名, 离散对数, 强RSA假定

Abstract: To deal with the key exposure problem in the designated verifier proxy signature, a forward secure designated verifier proxy signature scheme is proposed. The forward-secure thought is integrated into the new scheme in which the whole validity time is divided into T time periods, the public key always stays fixed while the private key updates as time goes. Experimental results show that the new scheme not only has some degree of improvement in terms of efficiency, but also realizes that even if the current proxy signer’s key is exposed, the adversary can not succeed in forging the valid proxy signature pertaining to the past which can effectively reduce the damage of key exposure.

Key words: forward secure, designated verifier, digital signature, proxy signature, discrete logarithms, strong RSA assumption

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