Whether PIN or signature, smart cards are coming

Smart cards, already used for credit transactions in about 130 countries, are coming to America. But it will be years before we all have these fraud-resistant credit cards in our wallets. Though U.S. banks have been issuing the cards for a few years, the recent rash of data breaches at Target and other retailers has injected a sense of urgency into their efforts. The big question is what type of smart cards the banks will issue. Will they require a PIN code for authentication or simply a signature?