Duo Two-Factor security is used to verify your login to certain Earlham College services. The two factor authentication can be linked to a mobile device, a landline, or a tablet. Earlham College ITS strongly recommends setting up more than one device in the event that you are unable to access your preferred deviceDUO two-factor authentication is a security method that adds an extra layer of protection to online accounts and systems by requiring users to verify their identity using a secondary device or method in addition to their usual login credentials.