Paper 2015/703
Point-Function Obfuscation: A Framework and Generic Constructions
Mihir Bellare and Igors Stepanovs
Abstract
We give a definitional framework for point-function obfuscation in which security is parameterized by a class of algorithms we call target generators. Existing and new notions are captured and explained as corresponding to different choices of this class. This leads to an elegant question: Is it possible to provide a generic construction, meaning one that takes an arbitrary class of target generators and returns a point-function obfuscator secure for it? We answer this in the affirmative with three generic constructions, the first based on indistinguishability obfuscation, the second on deterministic public-key encryption and the third on universal computational extractors. By exploiting known constructions of the primitives assumed, we obtain new point-function obfuscators, including many under standard assumptions. We end with a broader look that relates different known and possible notions of point function obfuscation to each other and to ours.
Metadata
- Available format(s)
-
PDF
- Category
- Foundations
- Publication info
- A major revision of an IACR publication in TCC 2016
- Keywords
- point-function obfuscationindistinguishability obfuscationone-way functionsdeterministic encryptionUCE
- Contact author(s)
- istepano @ eng ucsd edu
- History
- 2016-03-03: last of 5 revisions
- 2015-07-14: received
- See all versions
- Short URL
- https://ia.cr/2015/703
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2015/703,
author = {Mihir Bellare and Igors Stepanovs},
title = {Point-Function Obfuscation: A Framework and Generic Constructions},
howpublished = {Cryptology {ePrint} Archive, Paper 2015/703},
year = {2015},
url = {https://eprint.iacr.org/2015/703}
}
