Comment on Google will now make passkeys the default for personal accounts

• a_fancy_kiwi@lemmy.world ⁨1⁩ ⁨year⁩ ago

  Not necessarily. I can’t imagine they’d want you to login to your iCloud or Google account on a public computer. It will probably work how Microsoft “Authenticator” works or how when you try logging in to iCloud or your Google account when you have 2FA turned on:

  1. Type in your username and click submit on the library computer
  2. The service on the computer tells you to look at your phone
  3. In the background, the service sent an encrypted challenge to your iCloud account
  4. All your devices receives a notification asking if that’s you trying to login
  5. You pull out your phone, click yes
  6. In the background, your phone decrypts the challenge and sends it back to the server
  7. The server verifies its you who is trying to login and logs you in on the library computer

  No sharing of keys necessary

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  • Nolegjoe@lemmy.world ⁨1⁩ ⁨year⁩ ago

    If that’s the case, then a bad actor could spam someone’s phone with notifications. All they’d need is a username.

    Or, like my mum, you don’t read what the notification says and just hit ‘OK’. Now you’ve let someone into your account without realising

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    • a_fancy_kiwi@lemmy.world ⁨1⁩ ⁨year⁩ ago

      Shit. Good point. According to this blog at 1Password, Bluetooth can be used to have one device verify another for a service. So I guess if the public device has Bluetooth, it’s possible 🤷‍♂️

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      • Natanael@slrpnk.net ⁨1⁩ ⁨year⁩ ago

        There’s more ways such as scanning a Qr code to establish a connection from the app to the computer, or by presenting a number on one device which must be entered on the other

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• Kusimulkku@lemm.ee ⁨1⁩ ⁨year⁩ ago

  Wouldn’t the private key stay in your phone and you’d be exchanging a challenge and a response?

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