Maximum Leakage Resilient IBE and IPE

Kaoru Kurosawa; Le Trieu Phong

Paper 2011/628 Original: eprint.iacr.org/2011/628 ↗

Maximum Leakage Resilient IBE and IPE

Kaoru Kurosawa

Le Trieu Phong

Abstract

In this paper, we show the first identity-based encryption (IBE) scheme, and inner product encryption (IPE) scheme, both of which achieve the maximum possible leakage rate $1-o(1)$ in the standard model under a static assumption. Specifically, under the DLIN assumption, even if $1-o(1)$ fraction of each private key is arbitrarily leaked, the IBE scheme is fully secure and the IPE scheme is selectively secure. (To our knowledge, no {\it leakage resilient} IPE scheme has been known so far.)

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
History: 2014-02-21: last updated; 2011-11-21: published
Short URL: https://ia.cr/2011/628
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2011/628,
      author = {Kaoru Kurosawa and Le Trieu Phong},
      title = {Maximum Leakage Resilient IBE and IPE},
      howpublished = {Cryptology {ePrint} Archive, Paper 2011/628},
      year = {2011},
      url = {https://eprint.iacr.org/2011/628}
}