this post was submitted on 16 Oct 2024
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I'm not gonna lie I still don't understand how passkeys work, or how they're different from 2fa. I'm just entering a PIN and it's ok somehow? I don't get it.
The passkey stored locally in some kind of hardware backed store on your device or in your password manager is the first factor: something you have.
The PIN/password or fingerprint/face to unlock the device and access the stored passkey is the second factor: something you know or something you are, respectively.
Two factors gets you to 2FA.