A team of scientists led by Jon Kellar at the South Dakota School of Mines and Technology have come up with a special QR code—using nanoparticles combined with blue and green fluorescent ink—that can be used to prevent counterfeiters from getting away with passing along forged cash.
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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/3AfNbiSX5K8/why-it-is-about-to-get-a-lot-more-difficult-to-produce-counterfeit-cash
SANDISK SALESFORCE COM
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