Below is an article aimed at PHP developers who want to automatically upload a PDF to VeryPDF’s online DRM/enciphering service using PHP + cURL. It explains what the example script does, how to run it, and what every POST parameter
How to Fully Protect Your PDF Workbooks and Block Virtual Printers Using VeryPDF DRM Protector (Business Plan)
For creators, publishers, and educators who sell or distribute PDF workbooks, one of the most difficult challenges is preventing unauthorized sharing. Even when a PDF is encrypted or password-protected, many users can still bypass protection simply by printing the document