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Why Printers Add Secret Tracking Dots - 0 views

    "At that point, experts began taking a closer look at the document, now publicly available on the web. They discovered something else of interest: yellow dots in a roughly rectangular pattern repeated throughout the page. They were barely visible to the naked eye, but formed a coded design. After some quick analysis, they seemed to reveal the exact date and time that the pages in question were printed: 06:20 on 9 May, 2017 - at least, this is likely to be the time on the printer's internal clock at that moment. The dots also encode a serial number for the printer. "
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