You enter this OTP code in your login page and if correct, you are authenticated succcessfully. Facebook will sent you a one-time password (OTP), either as an SMS on your phone or an authentication app such as Duo Mobile. When you enable two-factor authentication, you enter the account username and password, as usual. Two-factor authentication provides an extra layer of security. Many other online accounts such as Gmail, Outlook 365 use it to enhance security of their users. Facebook is not the only online service using 2FA. To make your Facebook account more secure, it is best to enable a security feature known as two-factor authentication (or 2FA). ![]() How do I make my Facebook account more secure? In a few cases, the hackers impersonated them and requested money and gift cards from their Facebook friends. Recently, a number of people have had their Facebook accounts hacked and the passwords changed.
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