Authenticator App vs Two-Factor Authentication / 2FA

A mobile application (such as Google Authenticator or Authy) that generates time-based one-time passwords (TOTP) for two-factor authentication, providing stronger security than SMS codes.

Security method requiring two different forms of verification to access an account—typically something you know (password) and something you have (phone, authenticator app, or hardware key)—providing critical protection against unauthorized access even if passwords are compromised.