Captcha can detect the same person passing a captcha over and over. We shadow-ban to increase the cost of this kind of attack.
Source: I wrote the og detection system for hCaptcha
Source: I wrote the og detection system for hCaptcha
Here's a fun experiment for someone: 1) Give N people K fake credit cards to enter into a form, and have them solve a captcha 2) Take recorded keyboard and mouse data similar to the captcha 3) Train a neural network model to identify
I've been out of this for 6 years but I bet transformers rock this problem now.