What Is Two-Factor Authentication? A Plain-English Explainer
Editor’s Note: This explainer is current as of October 2026. In a sentence: Two-factor authentication is a second lock on your accounts, and turning it on is the single highest-value security move most people never get around to. Plain-English VerdictTwo-factor authentication (2FA) means logging in takes two proofs instead of one: your password, plus a … Read more