MFA-Duo - How to Use a USB Security Key

This document explains how to use a USB Security Key for Multi-factor Authentication.

Before following these steps, make sure you've already registered your USB device to your account. More about that here: MFA-Duo - How to Register a USB Security Key.

  1. If you registered your USB device to function as both a Hardware token and a WebAuthn Authenticator in the instructions linked above, there are two options to login. Select Other options in the initial Duo prompt.

    other options

  2. Verify that your USB device is plugged into a USB port on your computer, then select which method you will like to use to authenticate:

Hardware token

  1. Select Hardware token from the list of options.

    hardware token

  2. Making sure your cursor is in the passcode field, press the button on your USB device. The passcode field should automatically populate with a six-digit code. Click Verify to login.

    enter passcode

WebAuthn Authenticator/Security Key

  1. Select Security key from the list of options.

    security key step 1

  2. Follow the prompts (which differ slightly between operating systems and browsers) to sign in with your USB device.

    use your security key

If you have any issues or questions, please contact the DoIT Help Desk.


See accessibility & usability information

We work with our users to address access and usability barriers in the MFA user experience. Learn details about known access barriers and workarounds at MFA-Duo - Accessibility & Usability Information. If you encounter a barrier or need assistance, please contact the DoIT Help Desk or call (608) 264-4357.

For questions regarding how to get access to the MFA mobile app contact the DoIT Help Desk at (608) 264-4357 or email

How to get access to a Security Key or Duo Token/Fob 


Students, to obtain a token/fob, please contact the DoIT Help Desk (608) 264-4357 or email Students with disabilities can also request a token or security key at the McBurney Disability Resource Center, 702 W. Johnson St., Suite #2104, Madison WI 53715 on the 2nd floor.

Faculty, Staff, and Researchers

Employees can get access to devices for MFA at their Human Resources Office or IT department. For questions contact the DoIT Help Desk at (608) 264-4357 or email 

Keywords2fa multi factor authentication usb keychain key flashdrive   Doc ID90554
OwnerMST SupportGroupIdentity and Access Management
Created2019-03-21 14:48:45Updated2024-01-09 00:30:02
SitesDoIT Help Desk, Identity and Access Management
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