No phone, no card, no problem! All Whole Foods stores will accept a palm-based biometric payment technology by the end of the year, Amazon announced on Thursday. To use the payment method, called Amazon One, shoppers will simply hover their hand over a scanner near check-out. Amazon intends to market the technology for widespread use by retailers, ticketing agencies, office security providers and others, so this convenience is poised to grow. But before you give Amazon full access to the unique biometric identifiers held in your palm, think carefully about the price of that convenience.
