Question to the crypto ppl: is there a known attack on AES, that deals with the fact that the same key is used for an AES128/192 and AES256 encryption (talking about CPA attacks and one half of the 256 bit key == 128 bit key). Just wonderd what the complexity of such an attack is
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Replying to @littlelailo
*non-expert thoughts* I don't think this would aid CPA at all, since it usually just targets the first round, which would be the same regardless of key length. Although, if dealing with noisy data, it would certainly be advantageous to recover the keys in increasing size order
2:49 PM - 27 Jan 2020
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