• ilinamorato@lemmy.world
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      9 months ago

      I can’t find the article I read, but if I recall correctly, they use patterns of minute variations in the power of the laser to cause a machine-detectable pattern to appear in the final printed output.

    • Jyek@sh.itjust.works
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      9 months ago

      They also use microscopic yellow dot patterns. Black and white only prints use a microscopic grey print pattern at the print boundary. The technique is a form of steganography. They aren’t tracking you btw. It gets used primarily to investigate fraud. Printer companies do it primarily because if they don’t, their brand will become associated with print related crimes. There are lists of printers that do not do steganographic serialization but those machines are almost entirely too poor quality to produce any convincing counterfeits anyways.

      • Wes_Dev@lemmy.ml
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        9 months ago

        That’s how it always starts though.

        People use any device or service they want. It’s a mix of crooks, tinkerers, journalists, etc.

        A company or government makes some moral panic and pushes some privacy or civil rights erosion in the name of “security”. The actual security benefit may or may not exist.

        Then other companies do the same to keep up.

        Then there’s only a handful of companies not doing the thing, so anyone who doesn’t want their privacy or civil rights eroded uses that, including crooks.

        Then politicians and the other companies point to the holdouts as “PROOF!” their changes were good, because look how many crooks use that stuff! (The number of crooks hasn’t changed, they’ve just been concentrated to a single location.) The moral panic deepens.

        The non-criminal population that cares about their privacy or civil rights speak out, but get accused of secretly being criminals, or some other crap that can be used to dismiss their concerns. “If you have nothing to hide, why are you so upset?” and all that.

        Now laws get passed to force all companies to do the same thing, to stop the criminals! But let’s not worry about anyone else. The tinkerers, journalists, privacy-advocates, etc. They don’t matter.

        The law gets passed, and now all toasters are legally required to record your breakfast conversations, for a silly example.