Duo's 2FA program integrates an additional level of security of your UCO accounts by requiring an additional level of authentication beyond your username and password. The Duo Mobile app is a free smartphone and tablet application that syncs with your UCO two-factor authentication (2FA) account to complete the authentication process. The program provides you with a secondary means of confirming your identity via mobile device, tablet or an authentication token, which you will use every time that you sign into any of the services accessed through UCO's single sign-on (SSO).