“Google wants a look at your hands before it lets you through. The company’s newest reCAPTCHA check, rolling out now as a test, asks you to switch on your camera and wave at it so an algorithm can decide whether you’re a human or a bot.
That wave is less casual than it looks. The system records a short video of your hand and pulls 21 hand-landmark coordinates from it, mapping your finger joints, your palm geometry, and the way you move in real time.
Google describes the purpose as liveness detection, a way for websites to fend off automated account creation, credential-stuffing, and other fraud. But this is still a biometric scan, collected so you can prove you’re a person and still involves turning on your cameras for Google.”
https://reclaimthenet.org/googles-new-recaptcha-wants-your-camera-access-and-21-points-of-your-hand