What is a notable security advantage of multi-factor authentication compared to single-factor authentication?

The notable security advantage of multi-factor authentication (MFA) compared to single-factor authentication (SFA) lies in reducing the chances of unauthorized access. MFA requires users to provide two or more verification factors to gain access to a system, making it significantly more difficult for unauthorized users to compromise an account.

This approach typically combines something the user knows (like a password), something the user has (like a smartphone for a text message code or authentication app), and sometimes something the user is (like a fingerprint). By layering these security factors, even if one factor is compromised—such as a password—there are additional hurdles an attacker must overcome to gain access to the account. This significantly enhances overall security and provides a robust defense against various forms of attacks, such as phishing, keylogging, or credential theft.

In contrast, single-factor authentication relies solely on one method of verification, usually a password, which can be more easily exploited. This inherent strength of MFA makes it a preferred choice for protecting sensitive information and access control.