Two-factor Authentication (2FA)

Two-factor authentication (2FA) is an additional layer of security that requires users to provide two pieces of evidence to verify their identity. Typically, the two factors used are something the user knows (such as a password or PIN) and something the user has (such as a physical token or mobile device). This authentication method adds an extra level of protection beyond just a password, reducing the likelihood of unauthorized access.

The process of 2FA usually involves the user entering their username and password, followed by a second step that involves providing the secondary factor of authentication. This can be a one-time password (OTP) sent via SMS, a generated code from an authenticator app, a biometric scan, or other means. By requiring the combination of these two factors, 2FA strengthens security by mitigating the risks associated with stolen passwords or shared credentials. It helps ensure that the person accessing an account or system is an authorized user and provides an additional barrier against phishing attacks, unauthorized logins, and data breaches.