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"I'm using [AES] in CBC mode, but the implementation doesn't add the randomness I want, the same message when encrypted looks the same." This is a problem. If you were using CBC mode correctly (i.e. with a random IV), then encrypting the same message twice would produce completely different ciphertext. Since you're not using CBC mode in the way it's ...


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Hmm, first about your type of encryption: ...for a Caesar Cipher that encrypts each letter with a different integer as a shift... This actually describes a Vigenère Cipher. The classic approach to break this kind of cipher is by Determine the key length first Break the underlying Caesar Cipher for each letter of the key. To follow this route a ...



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