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.
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.
Original language | English |
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Title of host publication | Topics in Cryptology -- CT-RSA 2017 |
Editors | Helena Handschuh |
Publisher | Springer |
Pages | 207-222 |
Number of pages | 16 |
DOIs | |
Publication status | Published - 2017 |
Event | Topics in Cryptology - The Cryptographer's Track at the RSA Conference 2017: CT-RSA 2017 - San Francisco, United States Duration: 14 Feb 2017 → 17 Feb 2017 https://www.rambus.com/ct-rsa-2017/ |
Publication series
Name | Lecture Notes in Computer Science |
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Volume | 10159 |
Conference
Conference | Topics in Cryptology - The Cryptographer's Track at the RSA Conference 2017 |
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Abbreviated title | CT-RSA 2017 |
Country/Territory | United States |
City | San Francisco |
Period | 14/02/17 → 17/02/17 |
Internet address |