What does multi-factor authentication require?

Multi-factor authentication (MFA) requires two or more verification methods to enhance security when accessing an account or system. This approach combines different categories of authentication factors, which may include something the user knows (like a password), something the user has (like a smartphone or security token), and something the user is (like a fingerprint or facial recognition). By requiring two or more of these factors, MFA significantly reduces the likelihood of unauthorized access because it is much harder for an attacker to obtain multiple authentication credentials simultaneously.

The emphasis on multiple verification methods is crucial because relying on a single method, such as a password alone, does not provide sufficient protection against various types of attacks, including phishing, password guessing, or credential theft. Therefore, the reliance on diverse methods within MFA creates a more robust security posture for user accounts and sensitive information.