A CVV, or Card Verification Value, might seem like just another set of numbers on your credit card or debit card ... on the back of the card, you'll find the American Express security code ...

Google Wallet will soon enable a more convenient, contactless method of adding credit and debit cards to the app.

Virtual debit cards operate just like traditional ones. They have the same 16-digit number, expiration date, and CVV number .

How Debit Cards Work Linked directly to the user’s bank account. Includes a 16-digit card number, CVV, and spending limit.