Adaptively attribute-hiding (hierarchical) inner product encryption

Tatsuaki Okamoto, Katsuyuki Takashima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

120 Citations (Scopus)

Abstract

This paper proposes the first inner product encryption (IPE) scheme that is adaptively secure and fully attribute-hiding (attribute-hiding in the sense of the definition by Katz, Sahai and Waters), while the existing IPE schemes are either fully attribute-hiding but selectively secure or adaptively secure but weakly attribute-hiding. The proposed IPE scheme is proven to be adaptively secure and fully attribute-hiding under the decisional linear assumption in the standard model. The IPE scheme is comparably as efficient as the existing attribute-hiding IPE schemes. We also present a variant of the proposed IPE scheme with the same security that achieves shorter public and secret keys. A hierarchical IPE scheme can be constructed that is also adaptively secure and fully attribute-hiding under the same assumption. In this paper, we extend the dual system encryption technique by Waters into a more general manner, in which new forms of ciphertext and secret keys are employed and new types of information theoretical tricks are introduced along with several forms of computational reduction.

Original languageEnglish
Title of host publicationAdvances in Cryptology, EUROCRYPT 2012 - 31st Annual International Conference on the Theory and Applications of Cryptographic Techniques, Proceedings
Pages591-608
Number of pages18
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event31st Annual International Conference on the Theory and Applications of Cryptographic Techniques, EUROCRYPT 2012 - Cambridge, United Kingdom
Duration: 2012 Apr 152012 Apr 19

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume7237 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference31st Annual International Conference on the Theory and Applications of Cryptographic Techniques, EUROCRYPT 2012
CountryUnited Kingdom
CityCambridge
Period12/4/1512/4/19

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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