Fine-Grained Data Sharing Supporting Attribute Extension in Cloud Computing
Attribute-based encryption (ABE) can be used for implementing fine-grained data sharing in cloud computing. However, most of the existing ABE schemes cannot realize attribute extension and provable security simultaneously. In this paper, we propose a fine-grained attribute-based data sharing system based on a hybrid encryption mechanism. A rigorous security proof indicates that the proposed scheme is selective-secure under the decisional bilinear Diffie-Hellman assumption. In particular, the proposed data sharing scheme can efficiently support attribute extension and allow AND-gate access policies with multiple attribute values and wildcards. Extensive simulation results indicate that the proposed scheme is extremely suitable for data sharing in cloud computing.
Keywords: Data Sharing, Attribute-Based Encryption, Attribute Extension, Cloud Computing
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ABOUT THE AUTHOR
Yinghui Zhang
1. National Engineering Laboratory for Wireless Security, Xi'an University of Posts and Telecommunications, Xi'an 710121, P.R. China 2. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, P.R. China
Yinghui Zhang
1. National Engineering Laboratory for Wireless Security, Xi'an University of Posts and Telecommunications, Xi'an 710121, P.R. China 2. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, P.R. China