Switch to a Smart Card - Consumer Reports

A new device from Stratos, a company based in Ann Arbor, Mich., looks like a regular credit card. In fact, it’s a single piece of plastic onto which you can load all of your accounts using a special card scanner that Stratos provides. When you make a purchase, you tell the Stratos card which card you want to use and it encrypts the data. A nice feature: You can use a mobile app to automatically lock the card if you happen to misplace it.