Leakage-resilient functional encryption via pair encodings

Zuoxia Yu, Man Ho Allen Au, Qiuliang Xu, Rupeng Yang, Jinguang Han

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

7 Citations (Scopus)

Abstract

Leakage-resilient cryptography is proposed to address physical attacks on real world crypto-systems. Dual system encryption methodology is developed to guide design and analysis of various functional encryption schemes (FEs) with adaptive security. Observing the compatibility of dual system methodology and leakage-resilience, Lewko et al. present constructions of a number of strong leakage-resilient functional encryptions. In particular, they present fully secure identity-based encryption (IBE), hierarchical IBE (HIBE) and attribute-based encryption (ABE) satisfying the continual memory leakage (CML) model, one of the strongest models that allows continuous leakage on both user and master secret keys. Inspired by the recent work from Attrapadung on pair encodings which greatly simplifies the design and analysis of FE, we propose a generic framework for constructing fully secure FEs in the CML model (LR-FEs). Specifically, our framework “compiles” predicate encodings into fully secure LR-FEs in a two-step process. Firstly, we propose a generic transformation of pair encoding schemes into their leakage-resilient forms. Next, we present another conversion that turns leakage-resilient pair encodings into fully secure LR-FEs. Our framework is highly compatible with Attrapadung’s, meaning that it is applicable to many existing pair encoding schemes. The contribution of this paper is threefold. Firstly, our framework simplifies the design and analysis of LR-FEs into the design and analysis of predicate encodings. Secondly, our framework allows us to improve the security of some existing LR-FEs, such as LR-IBE with a tighter reduction. Thirdly, we discover new adaptively secure LR-FEs, including FE for regular languages, ABE for large universe and ABE with short ciphertext.
Original languageEnglish
Title of host publicationInformation Security and Privacy - 21st Australasian Conference, ACISP 2016, Proceedings
PublisherSpringer Verlag
Pages443-460
Number of pages18
ISBN (Print)9783319402529
DOIs
Publication statusPublished - 1 Jan 2016
Event21st Australasian Conference on Information Security and Privacy, ACISP 2016 - Melbourne, Australia
Duration: 4 Jul 20166 Jul 2016

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume9722
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference21st Australasian Conference on Information Security and Privacy, ACISP 2016
Country/TerritoryAustralia
CityMelbourne
Period4/07/166/07/16

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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