You can use passcodes for Duo authentication when cellular service is unavailable or when traveling internationally.

1. Log in to https://whooru.rice.edu
   
   
   
   
   
2. Authenticate to DUO when prompted.
   
   
3. Click on My Security.
   
   
   
   
4. Click Generate Codes.
   
   
   
5. Click Print Bypass Codes.