On the Effect of the Key-Expansion Algorithm in Simon-like Ciphers. (5th July 2021)

• Record Type: Journal Article
• Authors: Lu, Jinyu; Liu, Yunwen; Ashur, Tomer; Li, Chao
• Is Part Of: Computer journal. Volume 65:Number 9(2022)
• Page Start: 2454
• Page End: 2469
• Publication Date: 2021-07-05
• Subjects: rotational-XOR cryptanalysis -- Simeck -- Simon -- key-expansion algorithm; Computers -- Periodicals; 005.1
• DOI: 10.1093/comjnl/bxab082
• Languages: English
• ISSNs: 0010-4620

Abstract

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 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.