Two-Factor Authentication (2FA) works by adding an additional layer of security to your online accounts. It requires an additional login credential – beyond just the username and password – to gain account access, and getting that second credential requires access to something that belongs to you.

How does 2 step authentication work?

With 2-Step Verification (also known as two-factor authentication), you add an extra layer of security to your account in case your password is stolen. After you set up 2-Step Verification, you'll sign in to your account in two steps using: Something you know, like your password. Something you have, like your phone.

Does two-factor authentication actually work?

Reality: While two-factor authentication does improve security, it's not perfect, and it attracts attackers because mainly high-value applications use it. Most two-factor authentication technologies don't securely notify the user what they're being asked to approve.