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.
Use two-factor authentication and a password manager: If a scam compromises your login credentials, two-factor authentication (2FA) can block unauthorized access. Kurt Knutsson, FOXNews.com, 26 June 2025 Simple habits make a difference: using strong passwords and enabling two-factor authentication can deter many threats. Matthew Kayser, USA Today, 25 June 2025 An investigative report from Lighthouse Reports claims that millions of two-factor authentication codes for services run by tech giants like Amazon, Google and Meta were being routed using Fink Telecom Services–which allegedly has links to the spyware industry. Thomas Brewster, Forbes.com, 24 June 2025 However, Google also recommends that users upgrade their Gmail account's security by moving on from older sign-in methods like passwords and two-factor authentication. Theo Burman, MSNBC Newsweek, 20 June 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 30 Jun. 2025.

Last Updated: - Updated example sentences
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