To set up U2F Authenication, go to your Account Homepage. Once in your Account Homepage, you will see the following options. To set up and enable U2F, click on "Enable" under Universal 2nd Factor (U2F).
Name your U2F registration. In this example, the name of the U2F being set up is "u2f-key." Click "Add" when complete.
Connect the U2F Hardware Key device and push the button to enable the device for ProBit Exchange.
When the device is enabled, an email verification with an authentication code will be sent to your registered email address. Enter the code within 10 minutes. If you do not receive an email, please check in your spam mailbox.
See below for an example of the email with the code required to finalize the activation of U2F on ProBit Exchange.
Once the activation is complete, the section under Universal 2nd Factor (U2F) will have the status changed to Using. You can set up additional or remove U2F Hardware Keys to the account.