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Can You Spot the Secret Symbol Hiding in Your Currency…..Here’s Why Your Scanner Freaks Out if You Try to Copy Money

Saturday, October 1, 2016 7:48
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Could you print counterfeit money, certificates, or other official documents on a color laser or LED printer? Some current printer models are indeed capable of creating reasonable facsimiles. The authorities, however, have already taken steps to thwart such activity.

Print any nontext image on your printer, and take a very close look at it under bright light: You might just be able to make out a subtle pattern of yellow dots covering the page. Those dots are a microscopic code that allows government agencies to trace the page back to the printer that created it–making the person who pressed the Print button pretty easy to find.

How is the code printed, and what data does it contain? That’s secret, of course–printer vendors remain tight-lipped about the details. In 2005, the Electronic Frontier Foundation cracked the anti-counterfeiting code on a Xerox color laser printer; the documents the EFF examined were date- and time-stamped, and could be traced to the location of the printer.

Digging further in 2008, the EFF used the Freedom of Information Act to obtain hundreds of pages of documents on the use of printer-tracing technology from the U.S. Bureau of Engraving and Printing. According to EFF staff technologist Seth Schoen, “the strategy of the government agencies that have worked on this technology–both U.S. and foreign governments–is mainly to keep as quiet as possible and hope that as little information as possible gets out.”

As color laser printers become affordable enough for small or home offices, this tracing technology is coming closer to where we all live. “We were able to buy a low-end Dell color laser that was targeted to home users for just a few hundred dollars,” Schoen notes, “and it included tracking dots. It seems like they’re a part of the printers that more and more people use every day.”

Ever wondered what would happen if you tried to copy money on your printer or copier? Here’s your answer.

Nothing. Nothing happens because most modern scanners recognize money and won’t copy or print it.

When a scanner spots the pattern, it stops.

But there’s also a newer and even more secretive system called the Counterfeit Deterrent System, and it’s so effective that photo-editing software will often refuse to open a file that contains even a small piece of an image of a banknote.


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  • Easy enough to work around using a printer and computer that isn’t traceable to the user.

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