Cryptanalysis of Symmetric Primitives over Rings and a Key Recovery Attack on Rubato

ePrint Report: Cryptanalysis of Symmetric Primitives over Rings and a Key Recovery Attack on Rubato

Lorenzo Grassi, Irati Manterola Ayala, Martha Norberg Hovd, Morten Øygarden, Håvard Raddum, Qingju Wang

Symmetric primitives are a cornerstone of cryptography, and have traditionally been defined over fields, where cryptanalysis is now well understood. However, a few symmetric primitives defined over rings Z_q for a composite number q have recently been proposed, a setting where security is much less studied. In this paper …

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