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Like Magic: The Tech That Goes Into Making Money Harder to Fake


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$100 bills

The redesigned U.S. $100 bills that went into circulation in 2013 incorporate technology that features several visual illusions, all designed to foil counterfeiters.

Credit: Brendan Smialowski/AFP/Getty Images

In 2005, shortly after earning a master's degree in electrical and computer engineering, Sam Cape was looking for work online when he came across a cryptic help wanted ad.

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