What feature increases the security of online accounts?

Implementing two-factor authentication significantly enhances the security of online accounts by adding an additional layer of protection beyond just the password. This method requires users to provide two forms of verification before granting access to an account. Typically, the first factor is something the user knows (like a password), and the second factor can range from a temporary code sent to a mobile device to a biometric scan, such as a fingerprint.

This system drastically reduces the likelihood of unauthorized access, even if a password is compromised. Since an attacker would need both the password and the second form of authentication, it creates a more robust defense against common threats such as phishing attacks or credential stuffing, where attackers use stolen passwords from one site to access accounts on others. By requiring this dual verification, two-factor authentication effectively safeguards sensitive information and increases overall online security.