The users can upload files (images, PDF, documents,...) to the server where the website owner will receive and review them. The system will encrypt those files and they will be visible only for the administrator.
Then the administrator will validate the documents and he can change the state of the user to VERIFIED. That will show to other people that the current account is owned by a real person and they can trust him.
There is an option, the system to remove the personal data automatically after a certain date.
The extension provides a library ( API ) that the developers will be able to use to integrate it with their extensions easily.