
While this process does not happen every time someone logs into a site with two-factor verification, some financial and healthcare organizations may request verification every few days. That one-time code must also be entered to verify account ownership before the user can log in and access their account.

In many cases a one-time code is sent to a mobile device or email address.

This would be something that physical that the account holder owns that can receive additional credentials, like a phone app or physical security token. This is something that only the account holder knows, like the answer to a series of security questions or a PIN. The different type of factors that may be used are: There are three different factors that may be used in conjunction with an account password during 2FA. Two-factor verification is an approach to account security the specific method may vary based on each type of account or application. Learn More What Do You Need for Two-Factor Authentication?
