It is a design goal of symmetric crypto algorithms to produce an output that is indistinguishable from random with any reasonable effort.<p>Thereby what you&#x27;re asking for is a compression algorithm that is so good that you can use it to attack AES. As long as we consider AES as safe that won&#x27;t happen. (And I don&#x27;t expect that AES gets anywhere near being broken within decades to come.)