(For most, this will be the smartphone application Duo Mobile others may choose to purchase a YubiKey device from the Campus Store.) When you enroll in Duo, you will choose the way you will be asked for your second authenticating factor.

Duo, when used with a U2F hardware device (USB security key), will work in areas with unreliable internet access or coverage.

Duo will work in airplane mode, in areas without a cellular signal, and in locations with no Wi-Fi signal, because the Duo Mobile app (installed on your smartphone or tablet) can generate Duo Passcodes even when no network connection is available.

The good news is: There are several ways you can authenticate without connectivity. There may be times that cell phone service or data (or both) may be unavailable. While it may seem like this is just another worry to throw on top of everything else you're already doing in preparation for going abroad, don't panic! It's easy to study abroad with Duo. This includes those who study abroad during their time here. Duo Security is mandatory for faculty, staff, and students at Miami University.

Duo yubikey u2f