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I was considering using passkeys as a 1FA. I wanted users to login/register without email or password and without logging their IP.

But being anonymous would probably bring very bad things to any site.

So question is: is using passkeys anonymous? Can users be traced back to their IP or cloud accounts in case of them doing something nasty?

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  • Passkeys don't eliminate identity... and they don't replace IPs.
    – schroeder
    Commented Jan 1 at 21:04

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So question is: is using passkeys anonymous? Can users be traced back to their IP or cloud accounts in case of them doing something nasty?

Passkeys doesn't change what a service sees. It's a piece of information that can be used for authentication, just like a password. They will not hide your IP or increase your anonymity.

I basically wanted users to login/register without email or password and without logging their IP.

Then don't ask your users for e-mail address and don't log IP's.

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