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计算机工程 ›› 2010, Vol. 36 ›› Issue (16): 110-112. doi: 10.3969/j.issn.1000-3428.2010.16.040

• 安全技术 • 上一篇    下一篇

基于身份的代理盲签名方案分析与改进

张 妮,奚雪峰,陆卫忠,刘文亮   

  1. (苏州科技学院电子与信息工程学院,苏州 215011)
  • 出版日期:2010-08-20 发布日期:2010-08-17
  • 作者简介:张 妮(1977-),女,讲师、硕士,主研方向:信息安全,电子商务;奚雪峰,讲师、硕士;陆卫忠,副教授、硕士;刘文亮,讲师、硕士
  • 基金资助:
    2008年国家建设部科研基金资助项目(2008K950)

Analysis and Improvement of Identity-based Proxy Blind Signature Scheme

ZHANG Ni, XI Xue-feng, LU Wei-zhong, LIU Wen-liang   

  1. (School of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou 215011)
  • Online:2010-08-20 Published:2010-08-17

摘要: 通过对一种基于身份的代理盲签名方案的分析,指出该方案并不满足不可伪造性,代理人通过计算原始签名人的私钥,可以伪造原始签名人的签名或任何授权,且原方案有关签名盲性的证明存在错误。在此基础上提出一种改进的代理盲签名方案,克服了原方案的安全缺陷,有效防止代理人恶意的伪造攻击,且保留了原方案的其他优点。

关键词: 基于身份, 代理盲签名, 不可伪造性

Abstract: The identity-based proxy blind signature scheme proposed is analyzed, and it is found that their scheme does not possess the unforgeability property. Because the proxy signer can recover the original signer’s private key, one can forge the signing capabilities of the original signer. At the same time, it is found there is mistake about the process of proving their signature scheme satisfying blindness. An improved proxy blind signature scheme is proposed, which can resolve the security problems existing in the original scheme. Analysis indicates that improved proxy blind signature scheme is secure against the proxy signer’s forgery attack, and remains other merit of the original scheme.

Key words: identity-based, proxy blind signature, unforgeability

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