(Quantum) Collision Attacks on Reduced Simpira v2

Simpira v2 is an AES-based permutation proposed by Gueron and Mouha at ASIACRYPT 2016. In this paper, we build an improved MILP model to count the differential and linear active Sboxes for Simpira v2, which achieves tighter bounds of the minimum number of active Sboxes for a few versions of Simpira...

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Bibliographic Details
Published inIACR Transactions on Symmetric Cryptology Vol. 2021; no. 2; pp. 222 - 248
Main Authors Ni, Boyu, Dong, Xiaoyang, Jia, Keting, You, Qidi
Format Journal Article
LanguageEnglish
Published Ruhr-Universität Bochum 01.01.2021
Subjects
Collision
MILP
Quantum Attack
Rebound Attack
Simpira v2
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ISSN2519-173X
2519-173X
DOI10.46586/tosc.v2021.i2.222-248

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Summary:Simpira v2 is an AES-based permutation proposed by Gueron and Mouha at ASIACRYPT 2016. In this paper, we build an improved MILP model to count the differential and linear active Sboxes for Simpira v2, which achieves tighter bounds of the minimum number of active Sboxes for a few versions of Simpira v2. Then, based on the new model, we find some new truncated differentials for Simpira v2 and give a series (quantum) collision attacks on two versions of reduced Simpira v2.
ISSN:2519-173X
2519-173X
DOI:10.46586/tosc.v2021.i2.222-248