Reverse Engineering Cloudflare Turnstile CAPTCHA

This presentation delves into Cloudflare Turnstile, highlighting its implementation for enhanced user experience through browser fingerprinting and obfuscated JavaScript. It explores the Turnstile challenge process, including bytecode execution and server-side validations. Key protection measures such as encryption, advanced fingerprinting, and server complexity are outlined. A reverse engineering perspective reveals debugging techniques and tools for extracting fingerprint data and...