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Two-factor authentication

Two-factor authentication

(also 2FA)

Two-factor authentication definition

Two-factor authentication is the process that adds an extra security layer to the user’s account, making it much harder for malicious actors to attack and steal their data. It usually consists of something the user knows (a password), something the user has (access to a specific device), or something the user is (biometrics).

Two-factor authentication example

  • To log in to your bank account, you are first asked to enter your password. Then a one-time code is automatically sent to your phone. If you can prove that you’re also the device owner, you can log in.

Further reading

Ultimate digital security