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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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