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I would think that when you're viewing recaptcha on a site, if you have 3rd party cookies disabled the embedded recaptcha script won't have anyway of connecting

by varenc 1y ago

I would think that when you're viewing recaptcha on a site, if you have 3rd party cookies disabled the embedded recaptcha script won't have anyway of connecting you with your Google account, even if you're logged in. At least that's how disabling 3rd party cookies is supposed to work.

michaelt 1y ago
Of course, if you have 3rd party cookies disabled, Google would never link your recaptcha activity to your Google account. They just link it to your IP address, browser, operating system, screen resolution, set of fonts, plugins, timezone, mouse movements, GPU, number of CPU cores, and of course the fact you've got third party cookies disabled.
- Tostino 1y ago
  "Oh, that's interesting...there is one other user that matches all of that metadata"
- varenc 1y ago
  Isn't Chrome shifting to blocking 3rd party cookies by default? If that's the new default than the default behavior would be that being logged into Google isn't used as a signal for recaptcha
  - imcritic 1y ago
    Do you really think they won't make a hidden whitelist for their own domains?
    - varenc 1y ago
      There'd be no way to hide this. If 3rd party cookies are disabled it's trivial to observe if an embedded google.com iframe is sending my full google.com 1st party cookies in violation of the 3rd party cookie settings. There's no pinky promises involved, you can just check what it's sending with a MITM proxy. I'm sure they're doing other sketchy things but wouldn't make sense to lie in such a blindingly obvious way. (I just tested it, and indeed, it works as expected)
      - Sayrus 1y ago
        So like X-Client-Data which in many cases uniquely identified you but was, pinky promise, never used for tracking. Sent only to Google domains. https://9to5google.com/2020/02/06/google-chrome-x-client-data-tracking/ https://9to5google.com/2020/02/06/google-chrome-x-client-dat...
        varenc 1y ago
        that would fall under "I'm sure they're doing other sketchy things".

by varenc 1y ago

michaelt 1y ago

Of course, if you have 3rd party cookies disabled, Google would never link your recaptcha activity to your Google account. They just link it to your IP address, browser, operating system, screen resolution, set of fonts, plugins, timezone, mouse movements, GPU, number of CPU cores, and of course the fact you've got third party cookies disabled.

Tostino 1y ago
"Oh, that's interesting...there is one other user that matches all of that metadata"
varenc 1y ago
Isn't Chrome shifting to blocking 3rd party cookies by default? If that's the new default than the default behavior would be that being logged into Google isn't used as a signal for recaptcha
- imcritic 1y ago
  Do you really think they won't make a hidden whitelist for their own domains?
  - varenc 1y ago
    There'd be no way to hide this. If 3rd party cookies are disabled it's trivial to observe if an embedded google.com iframe is sending my full google.com 1st party cookies in violation of the 3rd party cookie settings. There's no pinky promises involved, you can just check what it's sending with a MITM proxy. I'm sure they're doing other sketchy things but wouldn't make sense to lie in such a blindingly obvious way. (I just tested it, and indeed, it works as expected)
    - Sayrus 1y ago
      So like X-Client-Data which in many cases uniquely identified you but was, pinky promise, never used for tracking. Sent only to Google domains. https://9to5google.com/2020/02/06/google-chrome-x-client-data-tracking/ https://9to5google.com/2020/02/06/google-chrome-x-client-dat...
      - varenc 1y ago
        that would fall under "I'm sure they're doing other sketchy things".