Bilinear Entropy Expansion from the Decisional Linear Assumption

Lucas Kowalczyk; Allison Bishop Lewko

Paper 2014/754

Bilinear Entropy Expansion from the Decisional Linear Assumption

Lucas Kowalczyk and Allison Bishop Lewko

Abstract

We develop a technique inspired by pseudorandom functions that allows us to increase the entropy available for proving the security of dual system encryption schemes under the Decisional Linear Assumption. We show an application of the tool to Attribute-Based Encryption by presenting a Key-Policy ABE scheme that is fully-secure under DLIN with short public parameters.

Note: Prime-order construction in previous versions was broken, and has been removed.

Metadata

Available format(s): PDF
Publication info: Preprint. MINOR revision.
Keywords: Cryptographic Protocols Attribute Based Encryption
Contact author(s): luke @ cs columbia edu
History: 2016-06-01: last of 6 revisions; 2014-09-29: received; See all versions
Short URL: https://ia.cr/2014/754
License: CC BY

BibTeX

@misc{cryptoeprint:2014/754,
      author = {Lucas Kowalczyk and Allison Bishop Lewko},
      title = {Bilinear Entropy Expansion from the Decisional Linear Assumption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2014/754},
      year = {2014},
      url = {https://eprint.iacr.org/2014/754}
}