Smartphone Options for Duo Authentication

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Context

Users who have installed and activated the Duo Mobile app can authenticate by accepting a push notification. The Duo Mobile app also allows you to authenticate using generated login codes, which work even if your device is not connected to the Internet.

Note: If you are looking to enroll in Duo for the first time, please visit KA 344.

Table of Contents

Authenticating via Duo Push

  1. To authenticate with Duo using a push notification, select Duo Push on the "Select an option to log in" authentication screen.
  2. You will be taken to a "Enter code in Duo Mobile" screen while you complete the next step on your device. 
    • In this screen you can see the name/number of the device the Duo Push has been sent to. Select the Other options link to choose another device or authentication method.Duo login screen displaying a three-digit verification code to enter in the Duo Mobile app.
  3. Open the Duo Mobile app, enter the code displayed from your log in, and select Verify.
    Duo Verified Push prompt asking the user to enter the three-digit verification code displayed on the login screen.

Authenticating via Passcode

Duo Mobile can generate passcodes for authentication even when your phone is not connected to the Internet.

  1. Open the Duo Mobile app and find the “The University of Texas at Dallas” protected login.
  2. Tap the account to expand and see the code.
Note: The passcode generated by the Duo Mobile app is only valid for 30 seconds, after which the app will automatically generate a new passcode.

Duo Mobile app showing a UT Dallas account with a six-digit passcode and countdown until the passcode refreshes.

  1. To use the code, select Duo Mobile Passcode on the "Select an option to log in" authentication screen.
  2. Enter the passcode generated in the mobile app in the field and select Verify.
    UT Dallas Duo authentication screen prompting the user to enter a passcode from the Duo Mobile app. The page includes a six-digit passcode field, a disabled “Verify” button, an “Other options” link, and a “Need help?” link.
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Duo
Duo is the university two-factor authentication method designed to add a second layer of security to your NetID account. Used to verify your identity using a second factor, such as the Duo Mobile App or a security key, to prevent anyone but you from logging in, even if they know your password.