When prompted for your code, you open the app and enter the displayed number. Authenticator appĪn authenticator app generates login codes on your smartphone. This is considered the weakest form of two-factor authentication, according to CISA. Then, you use the code to finish signing in to your account. You get an authentication code sent to your phone or email. And according to the Cybersecurity & Infrastructure Security Agency (CISA), the second step may involve any of the following: Text message (SMS) or email That second factor requires users to verify their identity in a second way. If the site’s authentication server verifies that information, the user goes on to the second part-or “factor”-of the authentication process. With 2FA, users start by entering their username and password-the first authentication factor. Two-factor authentication adds an extra layer of account security that aims to help prevent unauthorized online account access.
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