Everyone asks: Do RFID-safe bags work?

The Radio Frequency Identification chips (RFID) that are embedded in most credit cards are read by passing them through a scanner. This creates the theoretical possibility that anyone with a scanner hooked up to a computer could read a card in close proximity, use that information to generate a counterfeit card and hit the nearest Rolex outlet. There is a possibility, therefore,  that a thief could read every card in your wallet or handbag, without ever touching you.