Decision Aid: Choosing a Duo Option

This document lists the advantages and considerations for using some of the Duo options to help you choose the ones that will work best for you.

Be sure to set up a backup option if you haven’t done so already. See Options for Two-Factor Authentication for descriptions of all the options with links to enrollment procedures.

Duo Mobile app Duo Mobile app push notification  Duo Mobile app passcode

Advantages:

✔️ Offers multiple login-approval methods (passcode, push notification; phone call and text message when installed on a smartphone).
✔️ Works with or without a WiFi or cellular connection.
✔️ Likely always with you because it is stored on your smartphone or tablet.
✔️ Works with Apple Watch and Android smartwatch.
✔️ When traveling internationally, most people can use the Duo Mobile app to generate a passcode because it works without a WiFi or cellular connection.

Considerations:

◼️ Requires a smart device.

Text message text message passcodes

Advantages:

✔️ Each text message contains 10 passcodes that are good for 30 days.

Considerations:

◼️ Requires a WiFi or cellular connection to receive a text message; standard text message rates apply.

Hardware token Duo hardware token

Advantages:

✔️ Key fob is small and easily attached to a keychain, backpack, and so on.
✔️ Available at no cost to individuals from the Computer Showcase.

Considerations:

◼️ May be lost or misplaced. You are responsible for the cost if you want a replacement.

YubiKey YubiKey icon

Advantages:

✔️ Fits in the USB port of your computer, so login is quick and easy. Just touch the YubiKey.
✔️ Available at no cost to individuals from the Computer Showcase.

Considerations:

◼️ Takes up USB slot.
◼️ Not a good option if you use multiple computers.

Phone call Phone call for Duo prompt

Advantages:

✔️ You can use any or all of your phone numbers, including your U-M phone, personal home phone, and cell phone.
✔️ Tip: Your university phone number is a good backup option if you forget a device at home.

Considerations:

◼️ If you use a shared phone at work, you need to be at the phone to answer the call when you are logging in. Only you can verify your login.
◼️ Requires a phone—landline or cellular; standard phone rates apply.

Last Updated: 
Monday, October 28, 2019