I have noticed that some CAPTCHA pages, like Cloudflare's, simply ask you to check a box to proceed. There is no clicking on traffic lights or entering characters. How does clicking on a check box tell them I am not a robot?

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[–] 13 points 2 years ago (2 children)

I get the checkbox even on mobile sometimes, I imagine as long as you're not perfectly hitting the center pixel it knows you're human.

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