Cloudflare's Turnstile CAPTCHA service has been found to use WebGL fingerprinting, raising privacy concerns. The technique can uniquely identify users across websites, potentially compromising anonymity. This discovery has sparked significant discussion in the privacy and security communities.
Background
Cloudflare Turnstile is a popular CAPTCHA alternative that aims to verify human users without requiring interaction. WebGL fingerprinting is a technique that can uniquely identify browsers based on their graphics rendering capabilities.
- Source
- Hacker News (RSS)
- Published
- May 31, 2026 at 10:13 PM
- Score
- 7.0 / 10