Setting up a secondary form of ID is one of the best ways to keep your online accounts safe amid endless data breaches.

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Any two of the four are used in two-factor authentication (2FA); for example, using a password with a token (1 and 2) or a password and fingerprint scan (1 and 3). A password and security question ...

What is Two-Factor Authentication? Two-factor authentication (also known as multi-factor authentication or two-step verification) is an extra layer of protection — more protection than a traditional ...