Impossible-Differential and Boomerang Cryptanalysis of Round-Reduced Kiasu-BC

Christoph Erwin Dobraunig*, Eik List

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in Buch/BerichtBegutachtung


Kiasu-BC is a tweakable block cipher proposed by Jean et al. at ASIACRYPT 2014 alongside their TWEAKEY framework. The cipher is almost identical to the AES-128 except for the tweak, which renders it an attractive primitive for various modes of operation and applications requiring tweakable block ciphers. Therefore, studying how the additional tweak input affects security compared to that of the AES is highly valuable to gain trust in future instantiations.

This work proposes impossible-differential and boomerang attacks on eight rounds of Kiasu-BC in the single-key model, using the core idea that the tweak input allows to construct local collisions. While our results do not threat the security of the full-round version, they help concretize the security of Kiasu-BC in the single-key model.
TitelTopics in Cryptology -- CT-RSA 2017
Redakteure/-innenHelena Handschuh
Herausgeber (Verlag)Springer
PublikationsstatusVeröffentlicht - 2017
VeranstaltungTopics in Cryptology - The Cryptographer's Track at the RSA Conference 2017: CT-RSA 2017 - San Francisco, USA / Vereinigte Staaten
Dauer: 14 Feb. 201717 Feb. 2017


NameLecture Notes in Computer Science


KonferenzTopics in Cryptology - The Cryptographer's Track at the RSA Conference 2017
KurztitelCT-RSA 2017
Land/GebietUSA / Vereinigte Staaten
OrtSan Francisco

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