Two-Factor Authentication
What is two-factor authentication?
Two-factor authentication—commonly referred to as 2FA, two-step verification, 2-step verification, or dual-factor authentication—is a security procedure that requires account users to verify their identity in two different ways prior to granting them access to user accounts. This process is a form of multi-factor authentication requiring exactly two forms of the five commonly accepted authentication factors. Many companies utilize multi-factor authentication (MFA) software to achieve this.
par Merry Marwig, CIPP/US