two-factor authentication

noun

two-fac·​tor authentication ˈtü-ˈfak-tər- How to pronounce two-factor authentication (audio)
: a method of verifying the identity of a person (as for granting access to a system) by requiring a password and an additional form of authorization (such as a code, a fingerprint, or a smartphone app)
abbreviation 2FA
compare multi-factor authentication

Examples of two-factor authentication in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Passwords are not secure — even with two-factor authentication (2FA). Zak Doffman, Forbes.com, 20 July 2025 Additionally, users can enable two-factor authentication and manage sharing permissions to protect their files. Kurt Knutsson, FOXNews.com, 17 July 2025 That includes usernames, passwords, wallet keys and any two-factor authentication setups. Steve Hruby, The Enquirer, 15 July 2025 The Arlo app is swift to load, offers rich notifications, and supports two-factor authentication. Simon Hill, Wired News, 12 July 2025 See All Example Sentences for two-factor authentication

Word History

First Known Use

1990, in the meaning defined above

Time Traveler
The first known use of two-factor authentication was in 1990

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Cite this Entry

“Two-factor authentication.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/two-factor%20authentication. Accessed 29 Jul. 2025.

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