Earlier quoted context omitted.
> Now one could allow backups of a passkey That's literally part of what makes a passkey a passkey (v.s. just a WebAuthn credential), so that's a given. > as insecure as a password No. Passkeys can't be phished, passwords can. Passkeys can't be cracked after a data breach. Passwords can. Passkeys can't be set to something easily guessable. Passwords can. Passkeys can't be written on a post-it note and taped to your m…
> No. Passkeys can't be phished, passwords can. Passkeys can't be cracked after a data breach. Passwords can. Passkeys can't be set to something easily guessable. Passwords can. Passkeys can't be written on a post-it note and taped to your monitor. Passwords can. Passkeys can't be reused across multiple sites. Passwords can. Passkeys don't need to be cracked after a data breach of your backup provider, they are just…
Let's take Apple's implementation as an example (since that was the one I could most easily find information on). Their implementation stores passkeys in the iCloud keychain[1], which is end-to-end encrypted[2].
[1]: https://support.apple.com/guide/iphone/sign-in-with-passkeys...
[2]: https://support.apple.com/guide/security/secure-keychain-syn...