Login to manage your Duo-enabled mobile device or hardware token.
Get a new or replacement mobile device? Use this service to reactivate Duo.
Generate a temporary Duo code for use in situations where you may not have access to your Duo device or token.
Forget your phone or seeing an error message? Find quick solutions to some common issues.
Duo is now available to anyone with an OSU Login.
Strong passwords are essential, but they aren't enough. Phishing attacks and data breaches put your account at risk. Duo provides extra security for your OSU Account with two-step login.
As an incentive, once you sign up for Duo you can change your password one last time and then keep it as long as you'd like. No more mandatory annual password changes!
With two-step login, anyone trying to access your account must provide two forms of ID:
Some services and websites refer to this as two-step authentication, two-step verification, multifactor authentication, or login verification.
The difference between the "normal" OSU login screen and the two-step login screen is shown here.