Debit card number and PIN
Danger: With hidden devices at purchase or by hacking into retailers’ computers, scammers harvest and drain victims’ debit cards.
Protection: “I never use my PIN unless I’m at a bank ATM,” says Avivah Litan, an analyst at Gartner, an IT research firm. Shopping with your debit? Say “credit” at checkout and sign, or use a signature-required debit card.