An adaptively CCA-secure ciphertext-policy attribute-based proxy re-encryption for cloud data sharing

Authors

Kaitai Liang, City University of Hong Kong
Man Ho Au, University of WollongongFollow
Willy Susilo, University of WollongongFollow
Duncan Wong, City University of Hong KongFollow
Guomin Yang, University of WollongongFollow
Yong Yu, University of WollongongFollow

RIS ID

88094

Publication Details

Liang, K., Au, M., Susilo, W., Wong, D. S., Yang, G. & Yu, Y. (2014). An adaptively CCA-secure ciphertext-policy attribute-based proxy re-encryption for cloud data sharing. Lecture Notes in Computer Science, 8434 448-461.

Abstract

A Ciphertext-Policy Attribute-Based Proxy Re-Encryption (CP-ABPRE) employs the PRE technology in the attribute-based en- cryption cryptographic setting, in which the proxy is allowed to convert an encryption under an access policy to another encryption under a new access policy. CP-ABPRE is applicable to many real world applications, such as network data sharing. The existing CP-ABPRE systems, how- ever, leave how to achieve adaptive CCA security as an interesting open problem. This paper, for the rst time, proposes a new CP-ABPRE to tackle the problem by integrating the dual system encryption technology with selective proof technique. The new scheme supports any monotonic access structures. Although our scheme is built in the composite order bilinear group, it is proven adaptively CCA secure in the standard model without jeopardizing the expressiveness of access policy.