Glossary:Two Factor Authentication

Two Factor Authentication (2FA) and Multi Factor Authentication (MFA) are authentication schemes requiring a user to pass two or more tests, different in kind, in order to prove their identity. These are usually chosen from something you know (for example a password), something you have (a physical token) and something you are (a biometric such as a fingerprint or facial scan). Such a sytem is much harder to compromise than a simple password login.