MFA

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Abbreviations / Acronyms / Synonyms:

Multi Factor Authentication

NIST SP 800-209

Multifactor Authentication

NIST SP 1800-10C, NIST SP 1800-13B, NIST SP 1800-13C, NIST SP 1800-17b, NIST SP 1800-17c, NIST SP 1800-24B, NISTIR 8196

Multi-Factor Authentication

NIST IR 8406, NIST IR 8473, NIST SP 1800-31B, NIST SP 800-160 Vol. 2 Rev. 1, NIST SP 800-63-3, NIST SP 800-66r2, NIST SP 800-82r3, NISTIR 8333

Definitions:

An authentication system that requires more than one distinct authentication factor for successful authentication. Multifactor authentication can be performed using a multifactor authenticator or by a combination of authenticators that provide different factors. The three authentication factors are something you know, something you have, and something you are.
Sources:
NIST SP 1800-17b under Multifactor Authentication
NIST SP 1800-17c under Multifactor Authentication

Authentication using two or more factors to achieve authentication. Factors include: (i) something you know (e.g., password/personal identification number [PIN]); (ii) something you have (e.g., cryptographic identification device, token); or (iii) something you are (e.g., biometric).
Sources:
NIST SP 1800-27B under Multifactor Authentication
NIST SP 1800-27C under Multifactor Authentication from CNSSI 4009-2015

Glossary Comments

Comments about specific definitions should be sent to the authors of the linked Source publication. For NIST publications, an email is usually found within the document.

Comments about the glossary's presentation and functionality should be sent to secglossary@nist.gov.

See NISTIR 7298 Rev. 3 for additional details.