{"id":683,"date":"2026-10-26T03:49:50","date_gmt":"2026-10-26T03:49:50","guid":{"rendered":"https:\/\/sitefitters.com\/learn\/glossary\/two-factor-authentication\/"},"modified":"2026-10-26T03:49:50","modified_gmt":"2026-10-26T03:49:50","slug":"two-factor-authentication","status":"publish","type":"page","link":"https:\/\/sitefitters.com\/fr\/learn\/glossary\/two-factor-authentication\/","title":{"rendered":"Two-factor authentication (2FA)"},"content":{"rendered":"
Learn<\/a> \/ Glossary<\/a> \/ Security & Backups<\/a><\/div>

Two-factor Authentication (2FA)<\/em><\/h1>
In one sentence<\/small>Two-factor authentication adds a second check, usually a code from your phone, on top of your password before you can log in to an account.<\/div><\/div><\/section>

What It Is<\/h2>

Two-factor authentication, or 2FA, asks for two different kinds of proof when you log in: something you know, like a password, and something you have, like your phone. After entering your password, you type a short code from an authenticator app or approve a prompt. It is similar to a bank card that needs both the physical card and a PIN. One alone is not enough.<\/p>

Why It Matters for Your Business<\/h2>

Passwords leak all the time through data breaches on other websites, and many people reuse them. With 2FA turned on, a stolen password by itself will not get an attacker into your website, email, domain registrar or hosting account. For a business owner, the domain registrar and email accounts are the most important to protect, because whoever controls those can reset nearly everything else.<\/p>

Good to Know<\/h2>

Authenticator apps and hardware security keys are safer than text-message codes, which can be intercepted through SIM-swap scams. When you set up 2FA, save the backup codes somewhere safe, such as a password manager. Losing your phone without backup codes can lock you out of your own accounts for days while you prove who you are.<\/p>

Related terms<\/h4>
Brute-force attack<\/a>Admin dashboard<\/a>Domain registrar<\/a>Business email<\/a>Billing portal<\/a><\/div><\/div>