Guide to two-factor authentication

If you aren’t already protecting your most personal accounts with two-factor or two-step authentication, you should be. An extra line of defence that’s tougher than the strongest password, 2FA is extremely important to blocking hacks and attacks on your personal data. If you don’t quite understand what it is, we’ve broken it all down for you.

What it is

Two-factor authentication is basically a combination of two of the following factors:

• Something you know
• Something you have
• Something you are

Something you know is your password, so 2FA always starts there. Rather than let you into your account once your password is entered, however, two-factor authentication requires a second set of credentials, like when the DMV wants your licence and a utility bill. So that’s where factors 2 and 3 come into play. Something you have is your phone or another device, while something you are is your face, irises, or fingerprint. If you can’t provide authentication beyond the password alone, you won’t be allowed into the service you’re trying