Counterfeiting is predicted to drain US $4.2 trillion from the global economy by 2022, and can negatively affect virtually every economic sector, often with fatal consequences. Not only is currency a target for counterfeiting, but also pharmaceuticals, legal documents like bank notes, high-priced art, historical artifacts, consumer electronics, and even wearable apparel and accessories. In response, huge steps are being made by South Dakota School of Mines and Technology researchers and...