Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Conference papers

An All-In-One Approach to Differential Cryptanalysis for Small Block Ciphers

Martin R. Albrecht 1 Gregor Leander 2, * 
* Corresponding author
1 PolSys - Polynomial Systems
LIP6 - Laboratoire d'Informatique de Paris 6, Inria Paris-Rocquencourt
Abstract : We present a framework that unifies several standard differ-ential techniques. This unified view allows us to consider many, poten-tially all, output differences for a given input difference and to combine the information derived from them in an optimal way. We then propose a new attack that implicitly mounts several standard, truncated, impos-sible, improbable and possible future variants of differential attacks in parallel and hence allows to significantly improve upon known differential attacks using the same input difference. To demonstrate the viability of our techniques, we apply them to KATAN-32. In particular, our attack allows us to break 115 rounds of KATAN-32, which is 37 rounds more than previous work. For this, our attack exploits the non-uniformity of the difference distribution after 91 rounds which is 20 rounds more than the previously best known differential characteristic. Since our results still cover less than 1/2 of the cipher, they further strengthen our confi-dence in KATAN-32's resistance against differential attacks.
Document type :
Conference papers
Complete list of metadata

Cited literature [21 references]  Display  Hide  Download
Contributor : Martin Albrecht Connect in order to contact the contributor
Submitted on : Thursday, February 5, 2015 - 11:28:36 AM
Last modification on : Friday, January 21, 2022 - 3:21:24 AM
Long-term archiving on: : Wednesday, May 6, 2015 - 10:11:43 AM


Files produced by the author(s)



Martin R. Albrecht, Gregor Leander. An All-In-One Approach to Differential Cryptanalysis for Small Block Ciphers. SAC 2012 - 19th International Conference on Selected Areas in Cryptography, Aug 2012, Windsor, Canada. pp.1-15, ⟨10.1007/978-3-642-35999-6_1⟩. ⟨hal-01113283⟩



Record views


Files downloads