Paper 2021/674

On the Effect of the Key-expansion Algorithm in Simon-like Ciphers

Jinyu Lu, Yunwen Liu, Tomer Ashur, and Chao Li

Abstract

In this work we investigate how the choice of the key-expansion algorithm and its interaction with the round function affect the resistance of Simon-like ciphers against rotational-XOR (RX) cryptanalysis. We observe that among the key-expansion algorithms we consider, Simon is most resistant, while Simeck is much less so. Implications on lightweight ciphers design are discussed and open questions are proposed.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Preprint. Minor revision.
Keywords
Rotational-XOR CryptanalysisSimeckSimonKey-expansion Algorithm
Contact author(s)
univerlyw @ hotmail com
tomer ashur @ esat kuleuven be
History
2021-05-25: received
Short URL
https://ia.cr/2021/674
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2021/674,
      author = {Jinyu Lu and Yunwen Liu and Tomer Ashur and Chao Li},
      title = {On the Effect of the Key-expansion Algorithm in Simon-like Ciphers},
      howpublished = {Cryptology ePrint Archive, Paper 2021/674},
      year = {2021},
      note = {\url{https://eprint.iacr.org/2021/674}},
      url = {https://eprint.iacr.org/2021/674}
}
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