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Overview
This article explains how to generate two-step login passcodes using the Duo Mobile app by Duo Security, how to use them, and store them for future use.
Passcodes can provide a backup in case your other registered device(s) are unavailable.
Information
Prerequisite
Install the Duo Mobile app on your smartphone.
How to Use Duo Mobile passcodes during Two-Step Login
Please Note: If you have used another method to verify previously, you may need to select the Other options link first to change to using a passcode.
- Click the appropriate passcode option button on the Duo prompt
- For the Duo Mobile app, select the Duo Mobile passcode option
- For a token, select that option instead
- Type in the passcode digits
- Click Log In
How to Generate Duo Mobile Passcodes
Follow these instructions to generate passcodes with your Duo Mobile app:
- Open the Duo Mobile app on your cell phone.
- Tap on the University of Oregon entry.
- Use the passcode during login.
Users who have been previously involved in a technology security incident (such as clicking on a phishing email) may see that their passcode has a 30 second timer on it below where the passcode is displayed. This is expected. You must use your passcode in the time allotted. A new passcode will appear each time the one on screen expires.
Users who do not see a timer beneath the passcode have the ability to write the passcode down somewhere to save it for later use. To generate multiple passcodes, click on the Refresh Passcode button below the displayed passcode, and a new passcode will appear each time. Repeat to generate as many additional passcodes as desired. Be sure to write them down and use them in the order they were created. Using a passcode will invalidate every passcode generated before it in line.
How to securely store passcodes
- Keep passcodes somewhere safe from prying eyes, like in your wallet, or in an encrypted password safe application.
- Avoid storing your Duck ID password or details about how to use these passcodes near where you keep the passcodes themselves.
Passcode tips
- Passcodes can serve as a backup in case your other registered devices become unavailable.
- Each passcode can only be used one time.
- Use your passcodes in the order they were generated.
- If you use a passcode out of order, any preceding ones will be invalidated.
- Passcodes can be generated without cellular data or Wi-Fi connection.
- The passcodes do not have an expiration date. However, when you use a passcode, all passcodes you generated before that one become invalid for future use.