Log in with security keys as two-factor authentication
To add a security key on your desktop, you’ll need to be using the latest version of Chrome, Opera, Firefox, Edge, or Safari.
To add a security key:
Go to your Security and login settings.
Scroll down to Use two-factor authentication and click Edit. You may be asked to re-enter your Facebook password at this point.
Click Use security key.
Click Register security key then follow the on-screen instructions. (If you do not see the Register Security Key option, you may need to update your browser.)
If you are using an IDmelon Reader, insert it into the USB port of your device, tap your smartphone to the Reader which starts blinking blue for a few seconds to receive the notification.
If you are using IDmelon Pairing Tool, you will receive the notification on the smartphone which is already paired with your computer.
Once you’ve successfully added a security key to your account, you can start using it when you log in.