What does two-factor authentication (2FA) provide?

Two-factor authentication (2FA) enhances security by requiring two different forms of verification before granting access to an account or system. This typically combines something the user knows, like a password, with something the user has, such as a smartphone app generating a time-sensitive code or a hardware token. By implementing this dual layer of security, 2FA significantly reduces the likelihood of unauthorized access, as an attacker would need both forms of verification to gain entry.

This approach addresses vulnerabilities inherent in relying solely on a password, which might be compromised through various means such as phishing or brute force attacks. The addition of a second form, which is typically not easily accessible to an attacker, strengthens overall security. This is particularly critical in protecting sensitive information and critical systems, as it provides an added barrier even if the password is exposed.