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
Ok I see a lot if discussion on this topic but no one seems to have mentioned the main feature of the spec that makes them phishing resistant: presence detection. This is what makes FIDO resistant to credential replay. The spec is not perfect but it prevents most common phishing attacks.