Description

This feature adds a new captcha to the Joomla core. It's based on the concept of "proof of work": it presents a math task to the user's browser that the browser can solve automatically. It's not supposed to proof humanship of the user, but to proof that the user is willing to invest the necessary time to solve the task.

That makes it an excellent fit for Joomla's usecase:

• it does not rely on an external service, does not need an API key and does not have any privacy implications
• it's based on an opensource library
• it does not try to proof humanship - a fight that we can't win anyways
• it's accessible

It's currently based on the altcha library, see https://altcha.org.