What a virtual waiting room actually does, what an HTTP client has to handle to walk through it the way a browser would, and the five layers any client needs to model correctly.
What a ClientHello actually contains, why JA3 worked for six years and then stopped, and what JA4 fixes, with a Python reference you can run against your own packet captures.
Twenty-eight years of trying to tell humans from machines, traced through the original patents, papers, and announcements. Distorted text, reCAPTCHA, the checkbox, invisible scoring, signed agents.
