What is Two-Factor Authentication? A Simple Guide for Adults 50+
You enter your email address and password. The password is correct, but the account still does not open. Instead, your phone asks you to approve the sign-in. Or a six-digit code appears. Or the website asks for your fingerprint, face, or another security check. At first, that extra step can feel unnecessary. You already entered the password. Why should you have to prove who you are again? The answer becomes much clearer when you look at it from the other side. A password can be stolen. That second step may be what stops the person who stole it. This extra layer of protection is commonly called two-factor authentication , or 2FA . You may also see the term multi-factor authentication , or MFA . The names sound technical. The idea is not. What Does Two-Factor Authentication Actually Do? A password proves one thing: You know something that should be secret. Two-factor authentication asks for another kind of proof before letting you into the account. That second...