There are so many physical security keys out there. Which one should I use? April 21, 2022 18:08 Updated Anything that supports Fido U2F will work, such as YubiKey® and the Kensington Verimark Fingerprint Key. Related articles Why am I being asked to enter my PIN upon logging in to Internet Identity using my YubiKey®? What hardware is acceptable to use for users who opt for self-custody? What is a physical security key? How does a physical security key work? How do I add more devices to my Internet Identity? 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. Comments 0 comments Please sign in to leave a comment.