Two-Factor Authentication (2FA) is a security process that requires users to verify their identity using two different forms of authentication before accessing an account or system. This adds an extra layer of protection beyond just a password, significantly reducing the risk of unauthorized access.
One common use case for 2FA is securing cloud storage accounts, where users must enter their password and then verify their identity using a second factor, such as a one-time passcode (OTP), biometric authentication, or a security key. This prevents attackers from gaining access, even if they steal or guess the password. Many online services, including banking, email, and enterprise systems, implement 2FA to enhance security.