this post was submitted on 01 May 2025
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you know the computer thing is it plugged in?
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Unfortunately there are techniques that work with black and white printers too. I don't know if any have actually been implemented though.
I hadn't heard that. I guess imperceptible grey is just as good.
I can't find it now but IIRC it works differently - not by adding dots but by subtly modulation the laser power. It's more like traditional steganography.