The original post: /r/privacy by /u/Willows97 on 2025-05-04 10:29:06.

I have just watched a video about passkeys and I have a question or maybe two…

As I understand it I would use a biometric posibly a fingerprint to ID myself to my PC.

I have the private key and the public key is held by the website or service I want to use.

If I want to login to a website (blob.net) the website server issues a challenge to my device that is answered using the private key.

What happens if I decide I want to login to blob.net from another device such as a tablet? The private key is on the PC, it has not been shared and is physically stored on the PC not the tablet.

Atb