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by OJFord 838 days ago
No, because you could have it that the device is always identifiable, but nevertheless producing a randomly varying sequence of images.

Take printers for example, with some known to print a signature. Clearly they can still print a sheet a solid colour (or a number 0-100, or something character or whatever) at random (given some random source & control for doing so I mean) despite the device being identifiable.