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Cipher block chaining (CBC) is a method for encrypting large amounts of data with a block cipher that can only encrypt fixed length plaintexts. When used with an unpredictable initialization vector (IV), it is secure against chosen plaintext attacks (CPA-secure).
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Why can the last block contain a full block of padding in CBC Encryption?
I'm trying to understand the SSL Poodle Attack and I'm wondering why the last block of a CBC Record can be full of padding? …