计算机应用 ›› 2014, Vol. 34 ›› Issue (6): 1676-1680.DOI: 10.11772/j.issn.1001-9081.2014.06.1676

• 计算机安全 • 上一篇    下一篇

标准模型下基于身份的可公开验证签密方案

白寅城,韩益亮,杨晓元,卢万宜   

  1. 武警工程大学 信息安全保密重点实验室,西安 710086
  • 收稿日期:2013-12-09 修回日期:2014-01-29 出版日期:2014-06-01 发布日期:2014-07-02
  • 通讯作者: 白寅城
  • 作者简介:白寅城(1991-),男,山东禹城人,硕士研究生,主要研究方向:密码学、信息安全;韩益亮(1977-),男,甘肃会宁人,副教授,博士生导师,博士,CCF高级会员,主要研究方向:密码学、信息安全;杨晓元(1959-),男,湖南湘潭人,教授,博士生导师,主要研究方向:密码学、信息安全;卢万宜(1989-),男,河南信阳人,硕士,主要研究方向:密码学、信息安全。
  • 基金资助:

    国家自然科学基金资助项目;陕西省自然科学基础研究计划项目

Identity-based public verifiable signcryption scheme in standard model

BAI Yin,HAN Yiliang,YANG Xiaoyuan,LU Wanxuan   

  1. Key Laboratory of Information Security, Engineering University of Armed Police Force, Xi'an Shaanxi 710086, China
  • Received:2013-12-09 Revised:2014-01-29 Online:2014-06-01 Published:2014-07-02
  • Contact: BAI Yin

摘要:

现有基于身份的签密方案大多基于随机预言机模型。为解决因此带来的安全问题,在标准模型下提出了一个新的基于身份的高效签密方案。该方案基于离散对数、因式分解等困难问题,进一步提高了方案的安全性。并在判定性双线性Diffie-Hellman(DBDH)问题假设下证明了方案的机密性,在计算性Diffie-Hellman(CDH)问题假设下证明了方案的不可伪造性,此外方案还具有可公开验证功能。经比较与分析,和同类方案相比效率更高,安全性更强,适用范围更广。

Abstract:

The existing identity-based signcryption schemes are based on random oracle model. In order to solve its low security, a new identity-based efficient signcryption scheme was proposed in standard model. The proposed scheme was based on the difficult problems of discrete logarithm and factorization and could efficiently improve the security. And it is proved that the confidentiality relies on the Decisional Bilinear Diffie-Hellman (DBDH) assumption and the unforgeablity relies on the Computational Diffie-Hellman (CDH) assumption. In addition, the scheme has public verifiability. The comparison and analysis show that the proposed scheme is more efficient and has a wide application range compared with similar schemes.

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