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Appl. Sci. 2018, 8(12), 2519;

Unified Ciphertext-Policy Weighted Attribute-Based Encryption for Sharing Data in Cloud Computing

National Engineering Laboratory for Disaster Backup and Recovery, Information Security Center, School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing 100876, China
Data61, CSIRO, Sydney, NSW 2122, Australia
Global Big Data Technologies Centre, University of Technology Sydney, Sydney, NSW 2007, Australia
Author to whom correspondence should be addressed.
Received: 6 November 2018 / Revised: 30 November 2018 / Accepted: 4 December 2018 / Published: 6 December 2018
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With the rapid development of cloud computing, it is playing an increasingly important role in data sharing. Meanwhile, attribute-based encryption (ABE) has been an effective way to share data securely in cloud computing. In real circumstances, there is often a mutual access sub-policy in different providers’ access policies, and the significance of each attribute is usual diverse. In this paper, a secure and efficient data-sharing scheme in cloud computing, which is called unified ciphertext-policy weighted attribute-based encryption (UCP-WABE), is proposed. The weighted attribute authority assigns weights to attributes depending on their importance. The mutual information extractor extracts the mutual access sub-policy and generates the mutual information. Thus, UCP-WABE lowers the total encryption time cost of multiple providers. We prove that UCP-WABE is selectively secure on the basis of the security of ciphertext-policy weighted attribute-based encryption (CP-WABE). Additionally, the results of the implementation shows that UCP-WABE is efficient in terms of time. View Full-Text
Keywords: attribute-based encryption; cloud computing; data sharing attribute-based encryption; cloud computing; data sharing

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Li, W.; Ni, W.; Liu, D.; Liu, R.P.; Luo, S. Unified Ciphertext-Policy Weighted Attribute-Based Encryption for Sharing Data in Cloud Computing. Appl. Sci. 2018, 8, 2519.

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