A Note on Parameter Choices of Round5

Yongha Son

Paper 2019/949 Original: eprint.iacr.org/2019/949 ↗

A Note on Parameter Choices of Round5

Yongha Son

Abstract

We examine the current parameter choice of Round5, and rectify its consideration of the improved dual attack due to Albrecht [Albrecht-EC17]: there is one significant optimization of Albrecht's dual attack, which was not reflected to Round5 parameter choices. By taking this into consideration, some parameter choices of Round5 cannot enjoy the claimed security level.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
History: 2019-08-21: last updated; 2019-08-21: published
Short URL: https://ia.cr/2019/949
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2019/949,
      author = {Yongha Son},
      title = {A Note on Parameter Choices of Round5},
      howpublished = {Cryptology {ePrint} Archive, Paper 2019/949},
      year = {2019},
      url = {https://eprint.iacr.org/2019/949}
}