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Sure. FPGAs, or any IC, could contain subversive/backdoor hardware placed there by a sophisticated actor. For that matter, so could ostensibly passive components like connectors, ports, flat ribbon cables... now that we have sophisticated circuits that can be powered by stray magnetic waves (RFID and its advanced friends), so can components not connected to power, such as cases, clips, screws. It is a fascinating thing to think about, actually, and I don't see how 3D-printing every single thing around you is a realistic solution.

And considering that regular color printers (inkjet and laser) have all been backdoored for ages - they print mostly invisible constellations of dots into every page which identify the individual printer - I would say that backdooring a "silicon printer" is also a definite possibility.




> now that we have sophisticated circuits that can be powered by stray magnetic waves (RFID and its advanced friends)

The Soviets were doing that back in the 40s[0]

[0]: https://en.wikipedia.org/wiki/The_Thing_(listening_device)




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