two-factor authentication
noun
two-fac·tor authentication
ˈtü-ˈfak-tər- 
: 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
The real aim is to capture login credentials or trick you into handing over two-factor authentication codes.
—
Kurt Knutsson, FOXNews.com, 4 Oct. 2025
The protocol also doesn’t support two-factor authentication.
—Senior Reporter, PC Magazine, 2 Oct. 2025
Enable two-factor authentication wherever possible.
—Rahul Telang, The Conversation, 18 Sep. 2025
Google reinforced the importance of applying safeguards such as passkeys, two-factor authentication, and vigilance against phishing attempts.
—Gene Marks, Forbes.com, 7 Sep. 2025
See All Example Sentences for two-factor authentication
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Kurt Knutsson, FOXNews.com, 4 Oct. 2025
The protocol also doesn’t support two-factor authentication.
—Senior Reporter, PC Magazine, 2 Oct. 2025
Enable two-factor authentication wherever possible.
—Rahul Telang, The Conversation, 18 Sep. 2025
Google reinforced the importance of applying safeguards such as passkeys, two-factor authentication, and vigilance against phishing attempts.
—Gene Marks, Forbes.com, 7 Sep. 2025
See All Example Sentences for two-factor authentication
Cite this Entry
“Two-factor authentication.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/two-factor%20authentication. Accessed 9 Oct. 2025.
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