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An efficient and expressive ciphertext-policy attribute-based encryption scheme with partially hidden access structures

Cui, H.ORCID: 0000-0002-5820-2233, Deng, R.H., Wu, G. and Lai, J. (2016) An efficient and expressive ciphertext-policy attribute-based encryption scheme with partially hidden access structures. In: Chen, L. and Han, J., (eds.) Provable Security. Springer, pp. 19-38.

Link to Published Version: https://doi.org/10.1007/978-3-319-47422-9_2
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Abstract

A promising solution to protect data privacy in cloud storage services is known as ciphertext-policy attribute-based encryption CP-ABE. However, in a traditional CP-ABE scheme, a ciphertext is bound with an explicit access structure, which may leak private information about the underlying plaintext in that anyone having access to the ciphertexts can tell the attributes of the privileged recipients by looking at the access structures. A notion called CP-ABE with partially hidden access structures [14, 15, 18, 19, 24] was put forth to address this problem, in which each attribute consists of an attribute name and an attribute value and the specific attribute values of an access structure are hidden in the ciphertext. However, previous CP-ABE schemes with partially hidden access structures only support access structures in AND gates, whereas a few other schemes supporting expressive access structures are computationally inefficient since they are built from bilinear pairings over the composite-order groups. In this paper, we focus on addressing this problem, and present an expressive CP-ABE scheme with partially hidden access structures in prime-order groups.

Item Type: Book Chapter
Publisher: Springer
Copyright: © 2016 Springer International Publishing AG
Other Information: Series title: Lecture Notes in Computer Science; Vol. 10005
URI: http://researchrepository.murdoch.edu.au/id/eprint/44048
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