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Cryptanalysis of OCB2: Attacks on Authenticity and Confidentiality
OCB2 Authenticated Encryption Cryptanalysis
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2019/3/21
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 sin...
Breaking the confidentiality of OCB2
OCB2 confidentiality attack
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2018/11/12
OCB2 is a widely standardized mode of operation of a blockcipher that aims at providing authenticated encryption. A recent report by Inoue and Minematsu (IACR EPRINT report 2018/1040) indicates that O...
Plaintext Recovery Attack of OCB2
OCB2 plaintext recovery attack chosen plaintext
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2018/11/12
Inoue and Minematsu [Cryptology ePrint Archive: Report 2018/1040] presented efficient forgery attacks against OCB2, and Poettering [Cryptology ePrint Archive: Report 2018/1087] presented a distinguish...
Cryptanalysis of OCB2
OCB Authenticated Encryption Cryptanalysis
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2018/11/2
We present practical attacks against OCB2, an ISO-standard authenticated encryption (AE) scheme. OCB2 is a highly-efficient blockcipher mode of operation. It has been extensively studied and widely be...