Passkeys are a terrible idea. They are security theater and a disaster for users waiting to happen.
Imagine you're on vacation and have lost your phone. You want to go to a cafe and log into a chat app, an email service, whatever to contact your family. In the world that passkey advocates want this is impossible via the passkey flow. If you can't authenticate via a primary device that contains your private key, you're f-ed. Service providers know this so of course they will provide recovery mechanisms. (Not consistent recovery mechanisms of course, each will have their own convoluted and likely to be broken ones). If the recovery mechanism allows for knowledge based recovery (challenge questions) then you're basically telling people that they need N passwords rather than one password. Maybe that challenge question is just a long password (recovery key). Maybe it requires access to another system, which you likely don't have in this circumstance. So you're either back to having passwords, or you're f-ed. Security theater or a disaster.
A service only has value if I can access it. I should be able to sit down at any computer in the world with the knowledge in my head and get access to any online service to which I subscribe.
Imagine you're on vacation and have lost your phone. You want to go to a cafe and log into a chat app, an email service, whatever to contact your family. In the world that passkey advocates want this is impossible via the passkey flow. If you can't authenticate via a primary device that contains your private key, you're f-ed. Service providers know this so of course they will provide recovery mechanisms. (Not consistent recovery mechanisms of course, each will have their own convoluted and likely to be broken ones). If the recovery mechanism allows for knowledge based recovery (challenge questions) then you're basically telling people that they need N passwords rather than one password. Maybe that challenge question is just a long password (recovery key). Maybe it requires access to another system, which you likely don't have in this circumstance. So you're either back to having passwords, or you're f-ed. Security theater or a disaster.
A service only has value if I can access it. I should be able to sit down at any computer in the world with the knowledge in my head and get access to any online service to which I subscribe.