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Multi-Factor Authentication (MFA)

Authentication

Authenticator App Two-Factor Authentication (2FA) TOTP (Time‑Based One‑Time Password) Biometric Authentication

More than one “key” to your account.

Definition

Multi-factor authentication (MFA) uses two or more proofs to confirm it’s you, like a password plus a code, a security key, or a fingerprint.

In plain English More than one “key” to your account.

Why this matters

Why it matters: It makes it much harder for attackers to log in, even if they guess or steal a password.

Example

Example: Password + security key (or password + fingerprint).