Dual System Encryption via Predicate Encodings

Hoeteck Wee

Paper 2015/273

Dual System Encryption via Predicate Encodings

Hoeteck Wee

Abstract

We introduce the notion of predicate encodings, an information-theoretic primitive reminiscent of linear secret-sharing that in addition, satisfies a novel notion of reusability. Using this notion, we obtain a unifying framework for adaptively-secure public-index predicate encryption schemes for a large class of predicates. Our framework relies on Waters’ dual system encryption methodology (Crypto ’09), and encompass the identity-based encryption scheme of Lewko and Waters (TCC ’10), and the attribute-based encryption scheme of Lewko et al. (Eurocrypt ’10). In addition, we obtain several concrete improvements over prior works. Our work offers a novel interpretation of dual system encryption as a methodology for amplifying a one-time private-key primitive (i.e. predicate encodings) into a many-time public-key primitive (i.e. predicate encryption).

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: A minor revision of an IACR publication in TCC 2014
Contact author(s): wee @ di ens fr
History: 2015-03-25: received
Short URL: https://ia.cr/2015/273
License: CC BY

BibTeX

@misc{cryptoeprint:2015/273,
      author = {Hoeteck Wee},
      title = {Dual System Encryption via Predicate Encodings},
      howpublished = {Cryptology ePrint Archive, Paper 2015/273},
      year = {2015},
      note = {\url{https://eprint.iacr.org/2015/273}},
      url = {https://eprint.iacr.org/2015/273}
}