Two-Factor Authentication is an extra layer of security that requires not only a password and username but also requires the user to enter a 6-digit code. This code is sent as a text message to the user’s Cell Number during the login process. Note that the 6-digit code is also emailed to the user to provide an alternate method of authentication. Two-Factor Authentication can be enabled for each account in the My Account module under Settings. Once enabled, two-factor authentication is required for each new device or new network that you use. You can clear your device history by clicking on the “i” icon by the label for the Two-Factor Authentication control in My Account.