Check FIDO2 token metadata and PIN retries on Linux with fido2-token. It runs CTAP2 authenticatorGetInfo to show AAGUID, firmware, PIN protocols, retry counter, and resident https://www.valtersit.com/vault/inspect-fido2-token-metadata-and-pin-retry-counter-6662aa/
#fido2 #ctap2 #yubikey
