计算机应用 ›› 2013, Vol. 33 ›› Issue (04): 1055-1060.DOI: 10.3724/SP.J.1087.2013.01055

• 信息安全 • 上一篇    下一篇

可公开验证的代理重加密签密方案

李海峰1,蓝才会2,3   

  1. 1. 天水师范学院 物理与信息科学学院,甘肃 天水 741001
    2. 西北师范大学 数学与信息科学学院,兰州 730070
    3. 兰州城市学院 信息工程学院,兰州 730070
  • 收稿日期:2012-10-25 修回日期:2012-11-22 出版日期:2013-04-01 发布日期:2013-04-23
  • 通讯作者: 李海峰
  • 作者简介:李海峰(1978-),男,河北安国人,讲师,硕士,主要研究方向:密码学;蓝才会(1977-),男,江西永丰人,博士研究生,主要研究方向:信息安全、密码学。
  • 基金资助:

    国家自然科学基金资助项目(61163038);甘肃省自然科学基金资助项目(3ZS051-A25-042);天水师范学院科研项目(TSE0810)

Signcryption of proxy re-encryption with publicly verification

LI Haifeng1,LAN Caihui2,3   

  1. 1. College of Physics and Information Science, Tianshui Normal University, Tianshui Gansu 741001,China
    2. College of Information Project, Lanzhou City University, Lanzhou Gansu 730070, China
    3. College of Mathematics and Information Science, Northwest Normal University, Lanzhou Gansu 730070, China
  • Received:2012-10-25 Revised:2012-11-22 Online:2013-04-01 Published:2013-04-23
  • Contact: LI Haifeng

摘要: 已有的代理重加密签密的方案仅仅提供了不可否认性,其安全强度弱于适应选择选择消息下不可伪造性。因此,定义了在适应选择消息下不可伪造的安全模型,同时提出了一个新的代理重加密签密方案,新方案的授权人和受理人的签密文本都具有公开可验证性,并且新方案在随机预言模型下可证明安全,且该方案安全高效,适用于安全级别要求较高的实际应用领域。

关键词: 签密, 代理重加密签密, 随机预言模型, 可公开验证, 不可伪造性, 选择密文安全性

Abstract: The existing SignCryption with Proxy Re-Encryption (SCPRE) only provides non-repudiation and its security is weaker than that of the adaptive chosen message attack. Since there are two kinds of signcryption texts, the authors respectively provided two definitions for unforgeability: one was first-level signcryption text's unforgeability produced by the delegator and the other was second-level signcryption text's unforgeability produced by the delegatee. A new signcryption with proxy re-encryption scheme was also proposed, of which the first-level signcryption text and the second-level signcryption text all meet the publicly verifiable requirements, and its security can be proved under random oracle model. And the proposed new scheme is secure and effective. Therefore, this scheme is suitable for high security level requirements of the practical application areas.

Key words: signcryption, SignCryption with Proxy Re-Encryption (SCPRE), random oracle model, publicly verifiable, unforgeability, chosen ciphertext security

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