Paper 2023/730

The Problem of Half Round Key XOR

Anubhab Baksi, Nanyang Technological University
Abstract

In the design of GIFT, half round key XOR is used. This leads to the undesired consequence that the security against the differential/linear attacks are overestimated. This comes from the observation that; in the usual DDT/LAT based analysis of the differential/linear attacks, the inherent assumption is the full round key is XORed at each round.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Preprint.
Keywords
block ciphergiftdifferential attacklinear attack
Contact author(s)
anubhab baksi @ ntu edu sg
History
2023-05-24: last of 3 revisions
2023-05-21: received
See all versions
Short URL
https://ia.cr/2023/730
License
Creative Commons Attribution-NonCommercial-ShareAlike
CC BY-NC-SA

BibTeX

@misc{cryptoeprint:2023/730,
      author = {Anubhab Baksi},
      title = {The Problem of Half Round Key XOR},
      howpublished = {Cryptology ePrint Archive, Paper 2023/730},
      year = {2023},
      note = {\url{https://eprint.iacr.org/2023/730}},
      url = {https://eprint.iacr.org/2023/730}
}
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