"Passkeys, on the other hand, can’t be stolen or forgotten. They’re strings of letters and numbers that are unique to your account, stored on your device or in

"Passkeys, on the other hand, can’t be stolen or forgotten. They’re strings of letters and numbers that are unique to your account, stored on your device or in a safe cloud environment. You don’t need to memorize them — they’ll automatically unlock your accounts when you go to log in." What prevents passkeys from being stolen or copied? Can you export or backup your passkeys? Can you arbitrarily expire a passkey and re-key where it was being used? If you cannot, then they are not your passkeys--they belong to Apple, Google, Microsoft, etc. and they have locked you into their ecosystem. If you don't control your passkeys, what stops those who control "your" passkeys from using them without your permission?