A Generic Construction of Ciphertext-Policy Attribute- Based Encryption Supporting Attribute Revocation

作     者：WU Qiuxin 

作者机构：CollegeofScienceBeijingInformationScience&TechnologyUniversityBeijing100192PRChina 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2014年第11卷第A01期

页      面：93-100页

核心收录：

学科分类：0839[工学-网络空间安全] 08[工学] 0835[工学-软件工程] 081202[工学-计算机软件与理论] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金："Twelve Five" National Cryptography Development Fund [MMJJ201101025] 

主　　题：attribute revocation attribute based encryption ciphertext-Policy generic construction. 

摘      要：Attribute-based encryption is drawing more attention with its inherent attractive properties which are potential to be widely used in the newly developing cloud computing. However, one of the main obstacles for its application is how to revoke the attributes of the users, though some ABE schemes have realized revocation, they mostly focused on the user revocation that revokes the user＇s whole attributes, or attribute revocation under the indirect revocation model such that all the users＇ private keys will be affected by the revocation. In this paper, we define the model of CP-ABE supporting the attribute revocation under the direct revocation model, in which the revocation list is embed in the ciphertext and none of the users＇ private keys will be affected by the revocation process. Then we propose a generic construction, and prove its security with the decision q-BDHE assumption.