Passkeys are built on the FIDO2 standard (CTAP2 + WebAuthn standards). They remove the shared secret, stop phishing at the source, and make credential-stuffing useless.
But adoption is still low, and interoperability between Apple, Google, and Microsoft isn’t seamless.
I broke down how passkeys work, their strengths, and what’s still missing



While I use and love bitwarden, it’s not exactly foss. Although there is a foss implementation of their server backend
Vaultwarden (the free server implementation) also supports passkeys.