Credit Card Numbers: What Do They Mean?

You'll find your credit card number either on the front or on the back of the card. Credit cards usually have 15 or 16 ...
CNET

What is a Credit Card CVV and Where Do You Find It?

Evan Zimmer has been writing about finance for years. After graduating with a journalism degree from SUNY Oswego, he wrote credit card content for Credit Card Insider (now Money Tips) before moving to ...
American Banker

Is a four-digit security code too much friction? Google, Amex say it is.

Google has added virtual cards as part of a broader overhaul of its payment technology. American Express is the first company to adopt Google technology that supports virtual cards with minimal input ...
Hosted on MSN

These are the 50 most common four-digit PINs leaked on the dark web—make sure none of them are yours

Choosing a phone PIN code that's easy to remember might be a time-saver. It's also a potential security risk. If your phone or another device is lost or stolen, an easily-guessed PIN code makes it ...
New Scientist

Puzzle #172: Can you find the 4-digit code to Emma’s house?

Emma Neesha is a forgetful sort, and she has just locked herself out of her house with her keys still inside. Not to worry, she installed keypads on both her house and car for such occasions.