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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

22 Scopus Citations
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Author(s)

  • Kaitai Liang
  • Liming Fang
  • Duncan S. Wong
  • Willy Susilo

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)2004-2027
Journal / PublicationConcurrency Computation
Volume27
Issue number8
Online published13 Oct 2014
Publication statusPublished - 10 Jun 2015

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 to another 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 applications, such as fine-grained access control in cloud storage systems and medical records sharing among different hospitals. All the existing CP-ABPRE schemes are leaving chosen-ciphertext attack (CCA) security as an interesting open problem. This paper, for the first time, proposes a new CP-ABPRE scheme to tackle the 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 the decisional q-parallel bilinear Diffie-Hellman exponent assumption.

Research Area(s)

  • bilinear map, chosen-ciphertext security, ciphertext-policy attribute-based proxy re-encryption, proxy re-encryption

Citation Format(s)

A ciphertext-policy attribute-based proxy re-encryption scheme for data sharing in public clouds. / Liang, Kaitai; Fang, Liming; Wong, Duncan S.; Susilo, Willy.

In: Concurrency Computation, Vol. 27, No. 8, 10.06.2015, p. 2004-2027.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review