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

Christoph Erwin Dobraunig; Eik List

doi:10.1007/978-3-319-52153-4_12

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

Christoph Erwin Dobraunig^*, Eik List

^*Korrespondierende/r Autor/-in für diese Arbeit

Institut für Angewandte Informationsverarbeitung und Kommunikationstechnologie (7050)

Publikation: Beitrag in Buch/Bericht/Konferenzband › Beitrag in Buch/Bericht › Begutachtung

Abstract

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.

Originalsprache	englisch
Titel	Topics in Cryptology -- CT-RSA 2017
Redakteure/-innen	Helena Handschuh
Herausgeber (Verlag)	Springer
Seiten	207-222
Seitenumfang	16
DOIs	https://doi.org/10.1007/978-3-319-52153-4_12
Publikationsstatus	Veröffentlicht - 2017
Veranstaltung	Topics in Cryptology - The Cryptographer's Track at the RSA Conference 2017: CT-RSA 2017 - San Francisco, USA / Vereinigte Staaten Dauer: 14 Feb. 2017 → 17 Feb. 2017 https://www.rambus.com/ct-rsa-2017/

Publikationsreihe

Name	Lecture Notes in Computer Science
Band	10159

Konferenz

Konferenz	Topics in Cryptology - The Cryptographer's Track at the RSA Conference 2017
Kurztitel	CT-RSA 2017
Land/Gebiet	USA / Vereinigte Staaten
Ort	San Francisco
Zeitraum	14/02/17 → 17/02/17
Internetadresse	https://www.rambus.com/ct-rsa-2017/

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10.1007/978-3-319-52153-4_12

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Dobraunig, CE & List, E 2017, Impossible-Differential and Boomerang Cryptanalysis of Round-Reduced Kiasu-BC. in H Handschuh (Hrsg.), Topics in Cryptology -- CT-RSA 2017. Lecture Notes in Computer Science, Bd. 10159, Springer, S. 207-222, Topics in Cryptology - The Cryptographer's Track at the RSA Conference 2017, San Francisco, USA / Vereinigte Staaten, 14/02/17. https://doi.org/10.1007/978-3-319-52153-4_12

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

Abstract

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Konferenz

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