Biometrics and Business

Amazon’s brick-and-mortar stores and some Whole Foods Markets, you can link your credit card to your palm print and pay for your groceries by just waving your hand over a scanner. You probably already unlock your smartphone with your face or your fingerprint, so a palm print is no stretch. But the Amazon system is drawing concern from US lawmakers and privacy advocates. Ari Waldman, a professor of law and computer science at Northeastern University, explains. (Segment produced by Sam Faulconer)