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The keyword you are looking for is related-key attack, where exactly this kind of different input keys (without the restriction to 1 byte) is used to break the cipher. (Wiki) Related crypto-SE topic: Related-key attacks on AES A related-key attack on AES has been analyzed by Biryukov and Khovratovich Also worth a look: Security section of Wikpedia for a ...


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If we take some randomly generated key of AES-128 and we change any random 1 byte of that 16 byte key, will this make huge difference in the AES cipher text generated over same input string? Yes. The outputs with different keys differ greatly. If you pick two random keys the outputs must look completely uncorrelated, or an attacker could gain an ...


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Big numbers must be better than small numbers right. That is the logic behind those kinds of claims. The reality however is computing is limited to the laws of the physical universe. Setting quantum computing aside for now, the complexity of a problem can be translated into an energy cost. For classical computing that means that 128 bit is "beyond brute ...



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