Ok so let's assume passkeys are a form of saved generated password.
> 1. They are highly phishing resistant. Unlike passwords and popular forms of 2FA (TOTP and SMS), users can’t be tricked into sending their credential to a fake/malicious server. A passkey is bound to the server domain at the time the credential is created, and your OS/browser will simply not send it to the wrong place.
So why does my browser or password manager send saved normal passwords to a different domain than the one they were saved for? This is not a limitation of passwords but of the software that encourages saving passwords. It didn't need switching to machine only passwords to fix.
> 2. There is no credential for attackers to steal from servers in the case of server breach. This is because only a public key is stored on the server, instead of password hashes (or worse, plaintext, if the app/website developers don’t know what they’re doing).
What has stopped developers from using irreversible transformations on stored passwords in the past? The math was there.
> 3. Passkeys are guaranteed to be unique and secure. The same cannot be said for passwords. Even a password manager cannot guarantee that every single credential stored in the password manager is both unique and secure. And password complexity requirements often make it a painful game of trial and error to create a secure password, even when using a password manager.
If it's generated by software, any software should be able to assure uniqueness. This is again a failure of saved passwords / password managers.
> 4. Because of annoying password complexity requirements, the process of creating a new password can be annoying and take up to a minute or two of fiddling around, even when using a password manager. With a passkey, the process takes as long as Face ID or Touch ID (or equivalent on other platforms) every time. Every single credential creation and authentication is a fantastic user experience (both fast and easy).
Yes and here we get to the elephant in the room.
You become dependent on an easily stolen or destroyed device for authentication. It is a fantastic user experience until you're a plane flight away from home, your phone gets stolen. Your passkeys are safe in the secure enclave. Too bad you can't access them any more. How do you get home? You don't have any other devices to prove your identity, if you even have backup devices, they're at home. The flight options are in an app that you don't have the passkeys any more for. Your flight may get canceled or rescheduled and you have no way of knowing. If you didn't bring any physical credit cards or backup cash, you can't even eat.
Passkeys are all fine in your average techie environment, but can be a disaster outside it.