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 ProtocolsAttribute 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
Creative Commons Attribution
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},
      note = {\url{https://eprint.iacr.org/2014/754}},
      url = {https://eprint.iacr.org/2014/754}
}
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