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

Jinyu Lu; Yunwen Liu; Tomer Ashur; Chao Li

Paper 2021/674 Original: eprint.iacr.org/2021/674 ↗

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

Jinyu Lu

Yunwen Liu

Tomer Ashur

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.
History: 2021-05-25: last updated; 2021-05-25: published
Short URL: https://ia.cr/2021/674
License: https://creativecommons.org/licenses/by/4.0/

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},
      url = {https://eprint.iacr.org/2021/674}
}