AuthenticationAuthentication Authentication is the act of determining that a person is who they claim to be. For more information, see our Concepts page. makes use of one or more factors of authentication: something you know (e.g., a password), something you have (e.g., your smartphone), or something you are (e.g., a fingerprint). Multi-Factor Authentication (MFAMFA Authentication makes use of one or more factors of authentication: something you know (e.g., a password), something you have (e.g., your smartphone), or something you are (e.g., a fingerprint). Multi-Factor Authentication (MFA) makes use of two or more factors when authenticating you. For more information, see our Concepts page.) makes use of two or more factors when authenticating you. For more information, see our Concepts page.