Home/Glossary/Multi-Factor Authentication (MFA)

Multi-Factor Authentication (MFA)

An authentication method that requires users to provide two or more verification factors to gain access.

Identity & Access ManagementAlso called: "two-factor authentication", "2FA"

MFA combines something you know (password), something you have (hardware key, authenticator app), or something you are (biometrics).

Why it matters

  • Stops most credential-stuffing, phishing, and brute-force attacks.
  • Required for many compliance frameworks, including PCI DSS and Cybersecurity Maturity Model Certification (CMMC).

Implementation guidance

  • Prefer phishing-resistant methods like FIDO2 keys or WebAuthn.
  • Offer backup factors so productivity is not blocked.
  • Enforce MFA on privileged accounts first, then expand company-wide.