Quantum Security of the Fujisaki-Okamoto  and OAEP Transforms

Ehsan Ebrahimi Targhi; Dominique Unruh

Paper 2015/1210

Quantum Security of the Fujisaki-Okamoto and OAEP Transforms

Ehsan Ebrahimi Targhi and Dominique Unruh

Abstract

In this paper, we present a hybrid encryption scheme that is chosen ciphertext secure in the quantum random oracle model. Our scheme is a combination of an asymmetric and a symmetric encryption scheme that are secure in a weak sense. It is a slight modification of the Fujisaki-Okamoto transform that is secure against classical adversaries. In addition, we modify the OAEP-cryptosystem and prove its security in the quantum random oracle model based on the existence of a partial-domain one-way injective function secure against quantum adversaries.

Metadata

Available format(s): PDF
Publication info: Preprint. MINOR revision.
Keywords: Quantum Random oracle
Contact author(s): ehsan ebrahimi targhi @ ut ee
History: 2015-12-19: received
Short URL: https://ia.cr/2015/1210
License: CC BY

BibTeX

@misc{cryptoeprint:2015/1210,
      author = {Ehsan Ebrahimi Targhi and Dominique Unruh},
      title = {Quantum Security of the Fujisaki-Okamoto  and {OAEP} Transforms},
      howpublished = {Cryptology {ePrint} Archive, Paper 2015/1210},
      year = {2015},
      url = {https://eprint.iacr.org/2015/1210}
}