Article Photos: SD college tests fingerprint purchasing technology 3/7

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)