Two-factor authentication enhances the security of your account by using a secondary device to verify your identity. This prevents anyone but you from accessing your account, even if they know your password.
This process will help you set up your account with this added layer of security.

Register a Duo hardware token purchased from the bookstore.

Duo hardware token is only required for users who cannot use a supported mobile device. Additionally, Duo hardware token registration requires a 24 hour time period before it can be used with your account.