中国科学技术大学学报 ›› 2012, Vol. 42 ›› Issue (4): 296-301.DOI: 10.3969/j.issn.0253-2778.2012.04.006

• 原创论文 • 上一篇    下一篇

标准模型中基于身份的匿名加密方案

任艳丽   

  1. 1.上海大学通信与信息工程学院,上海 200072;2.上海交通大学计算机科学与工程系,上海 200240
  • 收稿日期:2011-05-27 修回日期:2011-10-14 出版日期:2012-04-30 发布日期:2012-04-30
  • 通讯作者: 任艳丽
  • 作者简介:任艳丽(通讯作者),女,1982年生,博士/讲师. 研究方向:密码学. E-mail: renyanli1982123@shu.edu.cn
  • 基金资助:
    国家自然科学基金(61071187,61073190),上海市科委重大项目(10DZ1500202),中国博士后科学基金(20100470675),上海市博士后资助计划项目(10R21413200)资助.

Anonymous identity-based encryption scheme without random oracles

REN Yanli   

  1. 1.School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China; 2.Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2011-05-27 Revised:2011-10-14 Online:2012-04-30 Published:2012-04-30

摘要: 现有基于身份的匿名加密方案在标准模型下的selective-ID模型中可证安全,或基于复杂的困难问题假设可证安全.使用阶为合数的双线性群,基于BDH(bilinear Diffie-Hellman)假设,提出新的基于身份匿名加密方案,在标准模型中是ANON-IND-ID-CPA安全的,仅需2次双线性对计算.与同类方案相比,该方案同时具备高的安全性与计算效率.

关键词: 匿名, 基于身份加密, 标准模型, BDH假设

Abstract: The anonymous identity-based encryption (IBE) schemes are currently only selective-ID secure without random oracles or provably secure under a complex assumption. An anonymous IBE scheme based on decisional bilinear Diffie-Hellman (BDH) assumption in a group of composite order was proposed, which is ANON-IND-ID-CPA secure without random oracles and only needs two bilinear pairing computations. This scheme is more secure and efficient than the existing ones.

Key words: anonymous, identity-based encryption, without random oracles, decisional bilinear Diffie-Hellman assumption