计算机应用 ›› 2010, Vol. 30 ›› Issue (3): 685-687.

• 信息安全 • 上一篇    下一篇

高效无证书签名方案的安全性分析和改进

梁红梅1,黄振杰2   

  1. 1. 福建漳州师范学院数学与信息科学系
    2.
  • 收稿日期:2009-09-02 修回日期:2009-10-28 发布日期:2010-03-14 出版日期:2010-03-01
  • 通讯作者: 梁红梅
  • 基金资助:
    福建省自然科学基金项目;福建省属高校科研专项

Security analysis and improvement of efficient certificateless signature scheme

  • Received:2009-09-02 Revised:2009-10-28 Online:2010-03-14 Published:2010-03-01

摘要: 最近,张玉磊等人提出一个基于双线性对的高效无证书签名方案,通过对其提出的方案进行安全性分析,指出他们的方案对替换公钥攻击是不安全的。对张玉磊等人的方案进行了改进,在q-强Diffie-Hellman困难性假设和离散对数困难假设下,在随机预言机模型中证明改进后的方案,是存在性不可伪造的。

关键词: 双线性对, 无证书签名, q-强Diffie-Hellman问题, 离散对数问题

Abstract: Recently, Zhang Yu-lei et al. proposed an efficient certificateless signature scheme based on bilinear parings. By analyzing the security of the Certificateless Signature (CLS) scheme proposed by Zhang et al., the authors pointed out that their scheme was insecure against public key replacement attack. An improved scheme was proposed. In random oracle model, the improved scheme was existentially unforgeable under q-Strong Diffie-Hellman (q-SDH) assumption and discrete logarithm assumption.

Key words: bilinear pairing, certificateless signature, q-Strong Diffie-Hellman (q-SDH) problem, Discrete Logarithm Problem (DLP)