Privacy preserving cloud data sharing system with flexible control. (August 2018)

• Record Type: Journal Article
• Authors: Fang, Liming; Ge, Chunpeng; Huang, Zhiqiu; Wang, Jiandong
• Is Part Of: Computers & electrical engineering. Volume 70(2018)
• Page Start: 978
• Page End: 986
• Publication Date: 2018-08
• Subjects: Cloud computing -- Privacy preserving -- Proxy re-encryption -- Broadcast re-encryption -- Public key encryption; Computer engineering -- Periodicals; Electrical engineering -- Periodicals; Electrical engineering -- Data processing -- Periodicals; Ordinateurs -- Conception et construction -- Périodiques; Électrotechnique -- Périodiques; Électrotechnique -- Informatique -- Périodiques; Computer engineering; Electrical engineering; Electrical engineering -- Data processing; Periodicals; Electronic journals; 621.302854
• DOI: 10.1016/j.compeleceng.2018.02.048
• Languages: English
• ISSNs: 0045-7906

Abstract

Abstract: With the development of cloud technology, sharing date between users securely becomes more and more important. Moreover, the cloud server should provide a flexible control on sharing date. This work presents a notion named fuzzy conditional broadcast proxy re-encryption (FC-BPRE), in which a semi-honest proxy can transform a delegator's ciphertext to a new ciphertext for a set of delegatees when the ciphertext satisfies a certain condition set by the delegator. However, the proxy cannot learn any useful information about the underlying plaintext. The proxy can convert a ciphertext, encrypted under a condition set W, to a ciphertext encrypted under a condition set W ′ using a broadcast re-encryption key, if and only if S and S ′ are close to each other. We first formalize the notion of FC-PBRE scheme and then proposed a construction.