Russian Style (Lack of) Randomness

Abstract : It is crucial for a cipher to be trusted that its design be wellexplained. However, some designers do not publish their design methodand instead merely put forward a specification. While this information issufficient for implementers, the lack of explanation hinders third partycryptanalysis.In a recent string of papers, Biryukov, Perrin and Udovenko identifiedincreasingly strong patterns in a subcomponent shared by the last twoRussian standards in symmetric cryptography, namely the hash functionStreebog (GOST R 34.11-2012) and the block cipher Kuznyechik (GOSTR 34.12-2015). In this paper, we summarize the latest result of Perrinon this topic and argue that, in light of them, these algorithms must beavoided.
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Submitted on : Friday, December 6, 2019 - 11:20:23 AM
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Léo Perrin, Xavier Bonnetain. Russian Style (Lack of) Randomness. Symposium sur la sécurité des technologies de l'information et des communications, Jun 2019, Renne, France. ⟨hal-02396792⟩

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