AOL

What's a six-digit verification code — and why you should never share it

What's a verification code, and why are they so important? Six-digit verification codes are a form of two-factor authentication, a process that helps keep your important online accounts secure. For ...
GIGAZINE

The mechanism by which you enter an email address or phone number and a 6-digit code is sent to log in is the 'worst password system', so it is pointed out that it needs to be ...

When logging in to an app or service, you often have to authenticate by entering your email address or phone number and a one-time password sent via email or text message. Engineer Daniel Huang points ...
Pocket-lint

If you aren't already using a 6-digit PIN, now is the time to switch

John is a writer at Pocket-lint. He is passionate about all things technology, and is always keeping up with the latest smartphone and PC releases. John has previously written at MobileSyrup. When ...
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 ...