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SIV is considered determanistic authenticated encryption because: It is deterministic; given a key, a plaintext maps to a specific ciphertext; there is no randomness involved. It is authenticated encryption; it provides privacy (that is, someone with a set of ciphertexts but without the key gets no information about the plaintexts, other than its length, ...


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The definition of DAE security, as given in Rogaway and Shrimpton's original paper (which both defines the security notion and proves that SIV mode satisfies it), does effectively require that a DAE scheme must protect ciphertext integrity. Specifically, the definition of DAE security (definition 1 in the paper) says that an encryption scheme is DAE secure ...



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