Credit card thieves have been taking advantage of smart card technologies to avoid getting caught, according to Krebs on Security. The US Secret Service offices in New York and St. Louis have apparently been working on a criminal investigation involving fraud rings using Fuze Cards to store stolen card data. Fuze Cards allow you to store up to 30 credit card details, and you can switch between them using the small screen on the front. It makes the data of the card you want to use available to merchants via a magnetic stripe and an embedded chip. You can also use them to withdraw money from ATMs.