this post was submitted on 24 Aug 2024
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It tests whether your mouse movement looks human--we're really bad at things like moving in straight lines, so it's pretty evident from a mouse movement log whether you're a human or a simple bot. It also takes a bunch of auxiliary browser/environment data into account. It's not perfect, but it's complicated enough to defeat to provide fine protection against cheap spam.
My question is how is it not trivial to add a noise wave or some shit to the bot path? Obviously, I have zero technical knowledge of how bots, pathing, or anti-bot analysis works
It uses other signals too, like what other sites you've visited with that checkbox on it, what CloudFlare has seen your IP address doing in the past, etc.
The google one is able to see if you're logged into a google account and take that into account.
There's even a new variant of the Google captcha that is invisible and doesn't even bother to show a checkbox.