A friend recently sent me a link to an article that was written more than a year ago. In it, writer Cameron Naramore explores the possibility that 3D printers could someday spy on their users. He references the practice of Steganography, describing how large 2D printer manufacturers like Epson and Xerox embed tiny markings during a print job as a way of tracking the use of their printers: The process of hiding a message inside a message is called steganography and originally these codes were implemented to convince the government that the printers couldn’t be used to forge money; any bills with mysterious dots that showed up under certain lights would be known to be counterfeit.…
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