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The AWS team published a key-committing variant of XAES (https://words.filippo.io/xaes-256-gcm/)! Still FIPS-compliant, and with a proof. Key commitment ensures the ciphertext can only be decrypted with one key, to avoid issues in higher-level protocols. https://eprint.iacr.org/2025/758.pdf
May 8, 2025, 12:01 PM