After you have verified your identity by correctly entering a one-time access
code, you’ll be presented with the option to register the computer. If you are
using a trusted device, you can select “Yes, Register this computer.” With a
registered device, only a username and password will be required to login
securely in the future. If you select “No, This is a public computer,” you will
continue to receive the one-time access code challenge on that computer as an
additional line of defense to prevent unauthorized access.