two factor authentication (2FA)

two factor authentication (2FA)

A "second step" needed to log into an online account, in addition to the user's passphrase. 2FA usually takes the form of a short "one time password" consisting of numbers and sometimes letters. 2FA is "something you have" where a password is "something you know".

Learn more in our article Online Security Best Practices.

Related term: authenticator app

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