A Note on the CLRW2 Tweakable Block Cipher Construction

Gordon Procter

Paper 2014/111

A Note on the CLRW2 Tweakable Block Cipher Construction

Gordon Procter

Abstract

In this note, we describe an error in the proof for CLRW2 given by Landecker et al. in their paper at CRYPTO 2012 on the beyond-birthday-bound security for tweakable block ciphers. We are able to resolve the issue, give a new bound for the security of CLRW2, and identify a potential limitation of this proof technique when looking to extend the scheme to provide asymptotic security.

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Preprint. MINOR revision.
Contact author(s): gordon procter 2011 @ rhul ac uk
History: 2014-02-16: received
Short URL: https://ia.cr/2014/111
License: CC BY

BibTeX

@misc{cryptoeprint:2014/111,
      author = {Gordon Procter},
      title = {A Note on the {CLRW2} Tweakable Block Cipher Construction},
      howpublished = {Cryptology {ePrint} Archive, Paper 2014/111},
      year = {2014},
      url = {https://eprint.iacr.org/2014/111}
}