MFA combines independent factors such as something you know (a password), something you have (a hardware key), and something you are (a biometric). Phishing-resistant methods such as WebAuthn/FIDO2 provide stronger protection against credential phishing than methods based on reusable codes.
MFA reduces exposure from stolen passwords, but its effectiveness also depends on enrollment, recovery, session security, and the method used.
Different methods offer different protection
Two passwords are still one factor type. MFA combines independent factors, and the method matters: authenticator codes and push approvals can still be phished or abused. Phishing-resistant methods bind authentication to the legitimate service, making them a stronger option where the service and devices support them.
Protect enrollment and recovery too
Begin with email, administrator accounts, remote access, and other high-impact systems. Check that people actually enroll, that bypasses are controlled, and that account recovery cannot quietly defeat the second factor. Document exceptions and support a safe recovery process so a lost device does not become an improvised security workaround.
MFA is a safeguard, not a guarantee
MFA does not stop every attack, particularly stolen sessions, malicious integrations, or misuse of legitimate access. Combine it with least privilege, device security, monitoring, and staff reporting. Review sign-in policies and recovery settings rather than equating an enabled switch with complete protection.
Related terms
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