Cryptanalysis of OCB2: Attacks on Authenticity and Confidentiality

ADVANCES IN CRYPTOLOGY - CRYPTO 2019, PT 1, pp. 3-31, 2019.

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Keywords:
OCB2Authenticated encryptionCryptanalysisForgeryPlaintext recoveryMore(1+)

Abstract:

We present practical attacks on OCB2. This mode of operation of a blockcipher was designed with the aim to provide particularly efficient and provably-secure authenticated encryption services, and since its proposal about 15 years ago it belongs to the top performers in this realm. OCB2 was included in an ISO standard in 2009. An internal...More

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