Two-factor authentication (2FA) is a security system that requires users to complete two separate verification steps when logging in. Typically, a password is combined with an SMS code, mobile app notification, or biometric data.
Why a Password Alone Isn’t Enough
Relying solely on a password leaves accounts exposed to cyberattacks and credential theft. Weak or reused passwords are especially easy to compromise. A second factor significantly reduces that risk.
Why It Strengthens User Security
Accessing the system requires both something you know (a password) and a physical verification step. This ensures the account is only accessible to the legitimate user—making it especially valuable in financial and enterprise systems.
