Deciding which devices to register with Duo

Introduction

We recommend registering at least two devices.

  • If you have at least two available, you'll always be able to use Duo, even if your default device is unavailable — for example, if you forget your smartphone at home, or lose it.
  • Don't have a second device? We recommend using the Duo Mobile app to pre-generate mobile passcodes you could use later to login in a pinch.

The following device types work with Duo:

Keep reading to learn more about these options.

Which devices should I register?

Smartphones and tablets

Smartphones are by far the most popular type of device to register with Duo because they're the easiest to use during login, and most people already carry a smartphone.

At the University of Oregon, more than 90% of Duo users have registered a mobile device.

Many login methods are possible with a smartphone or tablet after you install the free Duo Mobile app from Duo security:

  • Duo Mobile's Push feature: Receive a notification on your device and tap Approve
  • Generate a passcode: Enter digits into the Duo passcode field and click Login (these are great because they work even if your phone doesn't have an Internet connection!)
  • Pre-generate passcodes for emergencies: You can use the app to pre-generate passcodes you can use later as a backup way to login if your device is unavailable
  • Receive a phone call from Duo: Answer and press 1 to login
  • Receive passcodes via SMS (text message): Enter digits into the Duo passcode field and click Login

Non-smart cell phones

Your mobile doesn't have to be smart to help you stay secure with Duo!

You can also register non-smart cell phones and use these login methods:

  • Receive passcodes via SMS (text message): Enter digits into the Duo passcode field and click Login
  • Receive a phone call from Duo: Answer and press 1 to login

Landline phones

Register your desk phone as a backup device in case you forget your mobile at home, or register it as your default device if you don't have a mobile.

You can also register your home landline, if you ever work from home.

To use a landline phone, you'll just answer a phone call from Duo and press 1 to login.

Hardware tokens

Hardware tokens are recommended for users who have no other devices to register with Duo.

These tokens are small fobs about the size of a keychain. They generate passcodes the same way the Duo Mobile app does.

To use a token, you'll press a small button on the token and wait for the passcode to appear. This can sometimes take a few moments. When your passcode is ready, enter the digits into Duo's passcode field and click Login.

For more information about tokens, including how to get one from UO, please see this related article.

Can I or do I have to register a computer?

No, computers like laptops and PCs can't be registered with Duo.

How do I register?

See the related article Getting Started with Two-Step Login (Duo) for instructions.