It enhances account security by requiring users to provide something they know (like a password) in combination with something they have (such as a mobile device or hardware token). When logging into an account, users first enter their password and then receive a temporary code via SMS or an authentication app, which they must enter to complete the login process. This additional layer of security significantly reduces the risk of unauthorized access, as it requires both knowledge and possession to verify the user’s identity.
2FA Example
For example, when logging into a social media account, after entering your username and password, you may be prompted to input a code sent to your phone, ensuring that even if someone knows your password, they cannot access your account without also having your phone.