Passkeys are great but it does not solve an important problem
wired.com
wired.com
From [1], "Keychain items are transferred from device to device, travelling through Apple servers, but are encrypted in such a way that Apple and other devices can’t read their contents."
[1] https://support.apple.com/en-gb/guide/security/sec1c89c6f3b/...
It’s access on demand when needed. It can be done with or without passkeys, but the statements that Apple doesn’t have your passkey is inaccurate.
I don't believe that's possible because the secret key for Keychain lives in the Secure Enclave and is never exposed outside of that processor[1].
[1] https://developer.apple.com/documentation/security/certifica...
>> Once created, the passkey can be stored in iCloud’s Keychain and synced across multiple devices—meaning your passkeys will be available on your iPad and MacBook without any extra work.
So apparently you can transfer a passkey from device to device through cloud.