Talk:2522: Two-Factor Security Key
There are 2FA USB keys (WebAuthn, FIDO2, U2F) such as
https://shop.nitrokey.com/shop/product/nk-fi2-nitrokey-fido2-55 with a hole to attach a keychain - and the item in the last panel looks a bit like such one Bmwiedemann (talk) 03:48, 30 September 2021 (UTC)