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Does that mean that AES-256 is 'broken' in crypto terms?



It means that if you generate a series of keys by simply incrementing a counter, your 192- and 256-bit keys will be cracked before my 128-bit key.

But if you are generating keys that way, you should probably be more concerned about attacks against the RNG that generated the starting key.

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No.

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Wikipedia _does_ put AES inside Category:Broken block ciphers.. "Widely cryptanalysed ciphers like Advanced Encryption Standard are considered stronger than un-cryptanalysed ciphers even if there are impractical attacks against them."

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