Invisible qr codes to prevent money fraud

Invisible qr codes to prevent money fraud

This was announced by the south dakota school of mines. Using a mixture of nanoparticles and blue and green fluorescent ink, the researchers printed square codes on paper that are invisible in normal light. Only under a special infrared-like laser did the codes become recognizable and love to be read out with a smartphone. With the help of the codes, traders and consumers could find out whether they were holding a real or a counterfeit bill.

Up to now, the QR codes, which originated in japan, have mostly been used for advertising purposes. The images, which consist of black-and-white geometric patterns, can be photographed with a cell phone camera and converted into a link. They then usually went on to more in-depth content on the internet. Companies use this method to announce their web address on advertising posters, for example, and save smartphone users the trouble of typing in long addresses. Because the complex images are difficult to copy, they could soon be used in security printing as well, the U.S. Researchers suspect.

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