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
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Enable two-factor authentication as a matter of course, or use a Passkey which will serve as both a secure login method and as a second authentication factor. Davey Winder, Forbes, 10 Mar. 2025 Common security methods include updating passwords, two-factor authentication, and avoiding clicking suspicious links. Tommy Tuberville, Newsweek, 7 Mar. 2025 The report also revealed the top ways those surveyed secure their banking accounts, which include using two-factor authentication, monitoring accounts for suspicious activity and avoiding public Wi-Fi for banking. Arthur Zaczkiewicz, WWD, 7 Mar. 2025 If in doubt, check out my detailed guide on how to keep your device and software updated. 2) Enable two-factor authentication (2FA): Even if your credentials are stolen, 2FA adds an extra layer of security by requiring a secondary verification method, such as a one-time code sent to your phone. Kurt Knutsson, Cyberguy Report, Fox News, 3 Mar. 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 15 Mar. 2025.

Last Updated: - Updated example sentences
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