Tracking dots in printers — a history in government documents

January 13th, 2019 § 0 comments

Tracking dots in printers — a history in government documents

For twenty years, many color laser printers have included a hidden tracking code on each page they print. Made of microscopic yellow dots, the code can reveal to the police the unique identity of your printer.An example of the yellow-dot tracking pattern The EFF and others have reverse engineered a few of these codes, shedding light on how the system works technically. What they have not…

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