How does multi-factor authentication enhance security?

Multi-factor authentication enhances security by requiring multiple forms of verification before granting access. This approach adds layers of security beyond just a password, which, if compromised, can lead to unauthorized access.

When someone tries to log in, they must provide not only something they know (like a password) but also something they have (such as a smartphone app or a security token), or something they are (like a fingerprint). This significantly reduces the risk of unauthorized access, as an attacker would need to compromise multiple authentication factors to gain access.

For instance, even if a password is stolen, without access to the additional verification method, the attacker would still be blocked from logging in. Thus, multi-factor authentication is a critical defense mechanism against various cyber threats, including phishing, keylogging, and other forms of credential theft.