Re:Passkeys are just passwords that require a password manager
by Arrowmaster on Tuesday August 05, 2025 @02:10PM
(#44801925)
I don't think you understand how FIDO2 works.
If you are using non-discoverable keys, the type where you input your username to login and then it asks for the passkey, there is no limit because they are calculated from a single master key and seeded with the url.
If you are using discoverable keys when you don't even input a username to login, the latest Yubikey has a limit of 100 but other vendors hold more.
Physical hardware keys work across most devices and browsers as long as you have the key with you.
If you are using non-discoverable keys, the type where you input your username to login and then it asks for the passkey, there is no limit because they are calculated from a single master key and seeded with the url.
If you are using discoverable keys when you don't even input a username to login, the latest Yubikey has a limit of 100 but other vendors hold more.
Physical hardware keys work across most devices and browsers as long as you have the key with you.