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Simple.

First assume that a random-looking message is sent only by criminals.

Second, ignore the theoretical problems with measuring kolgomorov complexity of a message. That's just academic mumbo jumbo - "can I zip the message?" is good enough.

Third, buy $80 car battery at HD with $20 booster cables.




And how do you plan to detect steganography in funny cat pictures?

Or zip files that just seem corrupted? Will you try to unpack everything?




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