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About 50 students and four faculty members at the South Dakota School of Mines and Technology use pay pads such as this one, shown in a Feb. 15, 2013, photograph, in place of cash or credit cards to pay for items. The pilot program using Biocryptology -- or one's fingerprint and hemoglobin -- to identify buyers. (AP Photo, Amber Hunt)

SD college tests fingerprint purchasing technology

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RAPID CITY, S.D. (AP) -- Futurists have long proclaimed the coming of a cashless society, where dollar bills and plastic cards are replaced by fingerprint and retina scanners smart enough to distinguish a living, breathing account holder from an identity thief.

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