Multi-factor authentication (MFA) is an enhanced authentication method in which a user is granted access to a website or application only after proving their identity with 2 or more pieces of evidence (factors). As an example, a website employing two-factor authentication (2FA) will first ask you for a password and may then send you an additional passcode to your device or mobile phone which you have to verify before gaining access.
MFA comes in many forms:
- physical object (such as a fob) commonly employed by banks for account access
- single use code - sent via text message, phone call or email
- biometric input - fingerprint, facial scan, voice recognition
We highly recommend that you use MFA for services which provide it as it provides yet another level of security beyond using a secure password.