Extended proxy-assisted approach

Achieving revocable fine-grained encryption of cloud data

Conference paper (2015)

Authors

Yanjiang Yang Institute for Infocomm Research
Joseph K. Liu Monash University
K. Liang Aalto University
Kim Kwang Raymond Choo University of South Australia
Jianying Zhou Institute for Infocomm Research
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Published Date

01-01-2015

Language

English

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Abstract

Attribute-based encryption has the potential to be deployed in a cloud computing environment to provide scalable and fine-grained data sharing. However, user revocation within ABE deployment remains a challenging issue to overcome, particularly when there is a large number of users. In this work, we introduce an extended proxy-assisted approach, which weakens the trust required of the cloud server. Based on an all-or-nothing principle, our approach is designed to discourage a cloud server from colluding with a third party to hinder the user revocation functionality. We demonstrate the utility of our approach by presenting a construction of the proposed approach, designed to provide efficient cloud data sharing and user revocation. A prototype was then implemented to demonstrate the practicality of our proposed construction.