On the Limitations of Computational Fuzzy Extractors

Kenji Yasunaga; Kosuke Yuzawa

Paper 2014/605

On the Limitations of Computational Fuzzy Extractors

Kenji Yasunaga and Kosuke Yuzawa

Abstract

We present a negative result of fuzzy extractors with computational security. Specifically, we show that, under a certain computational condition, the existence of a computational fuzzy extractor implies the existence of an information-theoretic fuzzy extractor with slightly weaker parameters. The condition is that the generation procedure of the fuzzy extractor is efficiently invertible by an injective function. Our result implies that to circumvent the limitations of information-theoretic fuzzy extractors, we need to employ computational fuzzy extractors that are not invertible by injective functions.

Metadata

Available format(s): PDF
Publication info: Preprint. MINOR revision.
Keywords: fuzzy extractor error-correcting code computational security
Contact author(s): yasunaga @ se kanazawa-u ac jp
History: 2018-03-15: last of 5 revisions; 2014-08-13: received; See all versions
Short URL: https://ia.cr/2014/605
License: CC BY

BibTeX

@misc{cryptoeprint:2014/605,
      author = {Kenji Yasunaga and Kosuke Yuzawa},
      title = {On the Limitations of Computational Fuzzy Extractors},
      howpublished = {Cryptology ePrint Archive, Paper 2014/605},
      year = {2014},
      note = {\url{https://eprint.iacr.org/2014/605}},
      url = {https://eprint.iacr.org/2014/605}
}