[Resource Topic] 2022/1590: Misuse-resistant MGM2 mode

Welcome to the resource topic for 2022/1590

Title:
Misuse-resistant MGM2 mode

Authors: Liliya Akhmetzyanova, Evgeny Alekseev, Alexandra Babueva, Andrey Bozhko, Stanislav Smyshlyaev

Abstract:

We introduce a modification of the Russian standardized AEAD MGM mode — an MGM2 mode, for which a nonce is not encrypted anymore before using it as an initial counter value. For the new mode we provide security bounds regarding security notions in the nonce-misuse setting (MRAE-integrity and CPA-resilience). The obtained bounds are even better than the bounds obtained for the original MGM mode regarding standard security notions.

ePrint: https://eprint.iacr.org/2022/1590

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