Two-factor authentication (2FA) adds a second verification step beyond a password — typically a code from an authenticator app, SMS, hardware token, or biometric. Coverage of 2FA methods, setup guidance, bypass risks, and the upgrade path from SMS-based 2FA to phishing-resistant alternatives like FIDO2 hardware keys and passkeys.
SMS codes, authenticator apps, push prompts, hardware keys, biometrics, and passkeys compared on security, phishing resistance, compliance fit, and helpdesk cost for enterprise teams.
Two-factor authentication (2FA) goes beyond passwords to keep your accounts safe. Discover how it works, the different types available, and why enabling 2FA is one of the simplest yet most effective steps you can take to protect your digital life.
