Biometrics is the science of using biological properties, such as fingerprints, an iris scan, or voice recognition, to identify individuals. And in a world of growing terrorism concerns and increasing security measures, the field of biometrics is rapidly expanding. In order to assess how vulnerable the scanners are to spoofing, Stephanie C. Schuckers, an associate professor of electrical and computer engineering at Clarkson University and her research team made casts from live fingers using dental materials and used Play-Doh to create molds. They also assembled a collection of cadaver fingers. In the laboratory, the researchers then systematically tested more than 60 of the faked samples. The results were a 90 percent false verification rate.