Stay secure and connected! In the event that your primary Duo device is unavailable, we strongly encourage you to enroll more than one device and/or proactively generate bypass codes.

woman's hands using a cellphone

Choose a Primary Device

A smartphone or tablet used with the Duo Mobile app is the fastest and easiest way to use Duo. Don't own a smartphone or tablet? See other trusted Duo devices. 

Choose at Least One Back-up Device

This could be another smartphone or a tablet, landline, Security Key (e.g., U2F token), or (in limited cases) hardware token.

an office telephone
my account webpage menu item for generating bypass codes

Generate and Use Bypass Codes

Generate a set of 10 single-use bypass codes (valid for one year). The trick is to generate your codes BEFORE you need them. With Duo, as with most things, it pays to be prepared! Learn how to Generate and Use Bypass Codes.

Additional Resources

Duo Security at Sign In
Duo: Set Up and Use Duo Security