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Cryptanalysis of Tweakable Block Ciphers and Forkciphers

, 2019
openaire   +1 more source

Tweakable Block Ciphers Secure Beyond the Birthday Bound in the Ideal Cipher Model [PDF]

Lecture Notes in Computer Science, 2018
We propose a new construction of tweakable block ciphers from standard block ciphers. Our construction, dubbed \(\mathsf {XHX2}\), is the cascade of two independent \(\mathsf {XHX}\) block ciphers, so it makes two calls to the underlying block cipher using tweak-dependent keys.
Jooyoung Lee
exaly   +5 more sources

Elastic-Tweak: A Framework for Short Tweak Tweakable Block Cipher [PDF]

, 2021
Tweakable block cipher (TBC), a stronger notion than standard block ciphers, has wide-scale applications in symmetric-key schemes. At a high level, it provides flexibility in design and (possibly) better security bounds. In multi-keyed applications, a TBC with short tweak values can be used to replace multiple keys.
Avik Chakraborti, Nilanjan Datta, Ashwin Jha 0001, Cuauhtemoc Mancillas-López, Mridul Nandi, Yu Sasaki 0001   +5 more
core   +4 more sources

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The MALICIOUS Framework: Embedding Backdoors into Tweakable Block Ciphers

Lecture Notes in Computer Science, 2020
Inserting backdoors in encryption algorithms has long seemed like a very interesting, yet difficult problem. Most attempts have been unsuccessful for symmetric-key primitives so far and it remains an open problem how to build such ciphers.
Thomas Peyrin
exaly   +4 more sources

Tweakable SM4: How to tweak SM4 into tweakable block ciphers?

Journal of Information Security and Applications, 2023
Orr Dunkelman, Gaoli Wang, Zhenzhen Guo   +2 more
exaly   +2 more sources

Almost-Minimal-Round BBB-Secure Tweakable Key-Alternating Feistel Block Cipher

Symmetry, 2021
This paper focuses on designing a tweakable block cipher via by tweaking the Key-Alternating Feistel (KAF for short) construction. Very recently Yan et al. published a tweakable KAF construction.
Ming Jiang
exaly   +2 more sources

MATTER: A Wide-Block Tweakable Block Cipher. [PDF]

IACR Cryptol. ePrint Arch.
In this note, we introduce the MATTER Tweakable Block Cipher, designed principally for low latency in low-area hardware implementations, but that can also be implemented in an efficient and compact way in software.
Roberto Avanzi, Orr Dunkelman, Kazuhiko Minematsu   +2 more
core   +3 more sources

Collision-Resistant and Pseudorandom Hash Function Using Tweakable Block Cipher

Lecture Notes in Computer Science, 2023
Shōichi Hirose
exaly   +3 more sources

WCFB: a tweakable wide block cipher. [PDF]

IACR Cryptol. ePrint Arch., 2014
We define a model for applications that process large data sets in a way that enables additional optimizations of encryption operations. We designed a new strong pseudo-random tweakable permutation, WCFB, to take advantage of identified characteristics ...
Andrey Jivsov
core   +3 more sources

ZCZ – Achieving n-bit SPRP Security with a Minimal Number of Tweakable-Block-Cipher Calls [PDF]

Lecture Notes in Computer Science, 2018
Strong Pseudo-random Permutations (SPRPs) are important for various applications. In general, it is desirable to base an SPRP on a single-keyed primitive for minimizing the implementation costs.
Mridul Nandi, Ritam Bhaumik, Eik List
exaly   +3 more sources