Carnth writes "The biometric devices, made by a San Francisco-based company called Pay By Touch, are one part of a technological trifecta Shell is rolling out at its gas stations. Customers will be able to initially scan their fingerprints at a kiosk inside the gas station and can link payment information either at the store or online. In addition, gas station attendants are testing hand-held wireless devices that allow full-service customers to pay electronically at their car window. "I think it scares people," said Debbie Britton, a store manager. "They're more confused about the whole system. Some of them say, 'Well, now the FBI can find me.'" Shell said it will not share personal information of Pay By Touch customers with third parties, and it still offers traditional forms of payment for those uncomfortable with the system."