Question: Why would using text directly as a key in AES potentially compromise security? A 256 bit AES key corresponds how many bytes? What equivalent portion

Why would using text directly as a key in AES potentially compromise security? A 256 bit AES key corresponds how many bytes? What equivalent portion of a byte isnt being used for key material if we know that each byte in the key is an ASCII printable character? What does this imply for a 256 bit key? Rough approximations are sufficient here just justify your answer.

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