Is there a piece of Wolfram Language code out there that integrates reCAPTCHA (for human verification) into the Wolfram Cloud environment?
This is what the reCaptcha service looks like (in Swedish):
When you press the checkbox, metrics such as how long it took to mark the checkbox and how the mouse moved are sent to Google's server. This data is used to determine whether it was a human that marked the checkbox. It is not the same as the generic term "captcha".