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A ciphertext-policy attribute-based proxy re-encryption scheme for data sharing in public clouds

Liang, Kaitai, Fang, Liming, Wong, Duncan S and Susilo, Willy (2014) A ciphertext-policy attribute-based proxy re-encryption scheme for data sharing in public clouds Concurrency and Computation: Practice and Experience, 27 (8). pp. 2004-2027.

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Abstract

Ciphertext-policy attribute-based proxy re-encryption (CP-ABPRE) extends the traditional Proxy Re-Encryption (PRE) by allowing a semi-trusted proxy to transform a ciphertext under an access policy toanother ciphertext with the same plaintext under a new access policy (i.e., attribute-based re-encryption).The proxy, however, learns nothing about the underlying plaintext. CP-ABPRE has many real world appli-cations, such as fine-grained access control in cloud storage systems and medical records sharing amongdifferent hospitals. All the existing CP-ABPRE schemes are leaving chosen-ciphertext attack (CCA) securityas an interesting open problem. This paper, for the first time, proposes a new CP-ABPRE scheme to tacklethe problem. The new scheme supports attribute-based re-encryption with any monotonic access structures.Despite being constructed in the random oracle model, our scheme can be proven CCA secure under thedecisional q-parallel bilinear Diffie–Hellman exponent assumption.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Computing Science
Authors :
NameEmailORCID
Liang, Kaitaik.liang@surrey.ac.ukUNSPECIFIED
Fang, LimingUNSPECIFIEDUNSPECIFIED
Wong, Duncan SUNSPECIFIEDUNSPECIFIED
Susilo, WillyUNSPECIFIEDUNSPECIFIED
Date : 13 October 2014
Identification Number : 10.1002/cpe.3397
Copyright Disclaimer : Copyright © 2014 John Wiley & Sons, Ltd.
Uncontrolled Keywords : proxy re-encryption; ciphertext-policy attribute-based proxy re-encryption; bilinear map; chosen-ciphertext security
Depositing User : Jane Hindle
Date Deposited : 31 Oct 2017 11:25
Last Modified : 31 Oct 2017 11:25
URI: http://epubs.surrey.ac.uk/id/eprint/844697

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