Multi factor authentication or MFA is a type of authentication that uses two or more factors of authentication after you enter your password to access your online accounts, such as an online bank account, or just your email. There are three authentication factors involved in MFA. They are:
- - Something an online account owner knows. Like a PIN, passphrases, and something similar.
- - Something an online account owner has, like OTP delivered by the online service to the user on his or her mobile phone for further verification.
- - Biometrics, such as retina scan, voice recognition, etc.
What is the difference between MFA and 2FA?
You can find it in the original article from Typing AI.