kb/data/developer.mozilla.org/en-US/docs/Glossary/Multi-factor_authentication-0.md

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Multi-factor authentication - Glossary | MDN	1/3	https://developer.mozilla.org/en-US/docs/Glossary/Multi-factor_authentication	reference	web, html, css, javascript, documentation	2026-05-05T05:38:12.918680+00:00	kb-cron

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1. Glossary
2. Multi-factor authentication

Multi-factor authentication

Multi-factor authentication (MFA) is an authentication method in which the user has to present more than one type of evidence to a system in order to be authenticated. Most commonly, three different types of evidence (or factors) are distinguished:

• Something you know, such as a password or PIN
• Something you have, such as a cellphone or a hardware security token
• Something you are: a biometric such as a fingerprint