- Google's new reCAPTCHA test requires users to wave at their camera for verification using hand-landmark detection.
- The system captures hand movements via 21 landmarks to detect 'liveness' and prevent automated fraud.
- Google promises deleted footage after verification, no audio recording, and data use solely for security.
- The gesture-based check is optional for now, with traditional challenges still available, but may become mandatory.
- Concerns exist over biometric data collection by Google, given its history of data monetization and privacy policies.