完全安全的基于属性的广播加密方案

doi:10.3969/j.issn.1001-2400.2012.04.005

J4 ›› 2012, Vol. 39 ›› Issue (4): 23-28+154.doi: 10.3969/j.issn.1001-2400.2012.04.005

完全安全的基于属性的广播加密方案

孙瑾^1,2;胡予濮¹

(1. 西安电子科技大学计算机网络与信息安全教育部重点实验室，陕西西安 710071；
2. 西安理工大学理学院数学系，陕西西安 710054)

收稿日期:2011-04-18 出版日期:2012-08-20 发布日期:2012-10-08
通讯作者: 孙瑾
作者简介:孙瑾(1977-)，女，讲师，西安电子科技大学博士研究生，E-mail: oksunjin@xaut.edu.cn．
基金资助:
973资助项目(2007CB311201);国家自然科学基金资助项目(60970119，60833008);陕西省教育厅自然科学基金资助项目(11JK0505)

Fully secure attribute-based broadcast encryption

SUN Jin^1,2;HU Yupu¹

(1. Key Lab. of Computer Networks and Information Security of Ministry of Education, Xidian Univ., Xi'an 710071， China;
2. Dept. of Application Mathematics, Xi'an Univ. of Tech., Xi'an 710048， China)

Received:2011-04-18 Online:2012-08-20 Published:2012-10-08
Contact: SUN Jin

摘要/Abstract

摘要：

针对现有的广播加密方案效率与安全性难以兼顾的事实，利用Waters双系统密码技术及基于属性的密码系统，提出一个双系统密码技术下的基于属性的广播加密方案．该方案建立在标准模型下，通过对混合阶群双线性运算的正交性和向量属性的运用，成就了短的尺寸固定的密文，具有较高的计算效率与存储效率．该方案的安全性依赖于3个简单的静态假设，安全性证明显示该方案达到了完全安全性的高安全要求级别．

关键词: 双系统密码, 基于属性的密码, 广播加密, 可证明安全

Abstract:

According to the broadcast encryption scheme with wide applications in the real world but to the fact that its security and efficiency can not be taken into consideration in the model simultaneously, a fully secure attribute-based broadcast encryption scheme is proposed by combining Waters dual system encryption and attribute-based cryptography. Based on the standard model, by using the orthogonality property of composite-order bilinear groups and the attribute vector, the scheme can achieve constant-size ciphertext which constrains four group exponents. The scheme is proved by using three static assumptions which do not depend on the number of queries the attacker makes. Furthermore, the analytical results indicate that the scheme of this paper is fully secure and can satisfy the higher efficiency and practical requirement.

Key words: dual system encryption, attribute-based cryptography, broadcast encryption, provably secure

中图分类号:

TN918.1

孙瑾;胡予濮. 完全安全的基于属性的广播加密方案[J]. J4, 2012, 39(4): 23-28+154.

SUN Jin;HU Yupu. Fully secure attribute-based broadcast encryption[J]. J4, 2012, 39(4): 23-28+154.

参考文献

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完全安全的基于属性的广播加密方案

Fully secure attribute-based broadcast encryption

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