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一种素数阶群上构造的自适应安全的多授权机构CP-ABE方案

李琦1,3, 马建峰1,3, 熊金波1,3, 刘西蒙2,3, 马骏1,3   

  1. 1. 西安电子科技大学计算机学院, 陕西西安 710071;
    2. 西安电子科技大学通信工程学院, 陕西西安 710071;
    3. 西安电子科技大学陕西省网络与系统安全重点实验室, 陕西西安 710071
  • 收稿日期:2013-10-18 修回日期:2013-12-25 出版日期:2014-04-25
    • 通讯作者:
    • 马建峰
    • 作者简介:
    • 李 琦 男,1989年4月出生于江苏省淮安市.博士生,主要研究方向为基于属性的密码学.E-mail:qilijs@gmail.com
    • 基金资助:
    • 长江学者和创新团队发展计划资助 (No.IRT1078); 国家自然基金委员会-广东联合基金重点基金资助项目 (No.U1135002); 国家科技部重大专项 (No.2011ZX03005-002); 中央高校基本科研业务费项目 (No.JY10000903001); 国家自然科学基金 (No.61370078)

An Adaptively Secure Multi-Authority Ciphertext-Policy ABE Scheme on Prime Order Groups

LI Qi1,3, MA Jian-feng1,3, XIONG Jin-bo1,3, LIU Xi-meng2,3, MA Jun1,3   

  1. 1. School of Computer Science and Technology, Xidian University, Xi'an, Shaanxi 710071, China;
    2. School of Telecommunication Engineering, Xidian University, Xi'an, Shaanxi 710071, China;
    3. Shaanxi Key Laboratory of Network and System Security, Xidian University, Xi'an, Shaanxi 710071, China
  • Received:2013-10-18 Revised:2013-12-25 Online:2014-04-25 Published:2014-04-25
    • Supported by:
    • Supported by Program for Changjiang Scholars and Innovative Research Team in University (No.IRT1078); Program Sponsered by Key Fund of NSFC-Guangdong Province Joint Fund (No.U1135002); Major Project of Ministry of Science and Technology (No.2011ZX03005-002); Program of Fundamental Research Funds for the Central Universities (No.JY10000903001); National Natural Science Foundation of China (No.61370078)

摘要: 目前自适应安全的多授权机构基于属性的加密(Attribute-Based Encryption,ABE)方案都是在合数阶群上构造,针对其计算开销较大的问题,利用对偶配对向量空间技术,在素数阶群上构造了一种支持单调的访问结构且自适应安全的多授权机构密文策略ABE(Multi-Authority Ciphertext Policy ABE,MA-CP-ABE)方案.在标准模型下将该方案的安全性归约到判定性线性假设.性能分析表明,该方案在达到自适应安全的同时,具有更高的计算效率.

关键词: 基于属性的加密, 多授权机构, 密文策略, 自适应安全, 素数阶, 标准模型

Abstract: Previous adaptively secure multi-authority attribute-based encryption(ABE)schemes suffered from superfluous computation overhead on composite order groups.To tackle this problem,an adaptively secure multi-authority ciphertext-policy ABE(MA-CP-ABE)scheme on prime order groups was proposed when a dual pairing vector space approach was employed.The proposed scheme supports any monotone access structure,and is proven adaptively secure from the decisional linear assumption in the standard model.Performance analysis indicates that our scheme is more efficient while achieving the adaptive security.

Key words: attribute-based encryption, multi-authority, ciphertext-policy, adaptive security, prime order, standard model

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