How do I use my security key for authentication when logging in? July 09, 2021 00:34 Updated Simply plug in your security key to your device’s USB port (or wirelessly connect it) and tap when prompted. Related articles Why do I need a special / late-model hardware to use Internet Identity? What are some Internet Identity security key best practices? How do I add more devices to my Internet Identity? What is a physical security key? How does a physical security key work? I just set up my Internet Identity using my physical security key. I have another one that I wish to use as a backup in the event I lose my current one.