Duo has multiple options to meet your needs whether you are traveling domestically or internationally. In most situations, the Duo app for your smartphone should be all you need.

Duo Option Description Connection Required?
Duo Push A pop-up notification on your smartphone Yes, WiFi or cellular (2KB per push)
Duo App Pass Code A code generated by the Duo app on your smartphone or tablet No
Text/SMS A text message sent to your cell phone Yes, cellular
Call A phone call Yes, landline or cellular
Token A hardware token No

Our recommendation is to always enroll more than one device or option, in case your primary device is not available (lost, stolen, dead battery, etc.)  To enroll additional devices, visit our Duo FAQ.

If you are traveling without a smartphone or tablet, we recommend purchasing and using a hardware token. To learn more about tokens, visit our Token FAQ.


Enroll your device(s) ahead of time. You'll need to authenticate using Duo whenever you make changes to your  account, so it easiest to that before your trip.

Use what works. If you only be traveling with a tablet, install the Duo app and use pass codes. If your phone is a basic feature phone, using the text message or phone call options. If you only will have a laptop, purchase and enroll a token.

Travel to Embargoed Countries

Individuals who are traveling internationally should check with the Director of Risk Management regarding potential export control issues associated with traveling with different types of multi-factor authentication technologies in accordance with EWU Policy 201-10 (Export Control). According to federal export control regulations, the Duo app and hardware tokens may not be transported or sent to embargoed nations identified by the U.S. State Department. The following nations are on the embargoed list as of January 2020:

  • Crimea Region of Ukraine
  • Cuba
  • Iran
  • North Korea
  • Sudan
  • Syria

If you are traveling to any of those countries, delete or uninstall the Duo app from any devices you will take with you and do not take Duo hardware tokens with you.

You can use other Duo options, such as a phone call or passcodes via text message, while traveling in embargoed countries.