protecting contents in storyline

We want to protect the Articulate E-learning contents so that others do not have access to the source URL and share the course with other people.

We used the LearnDash Wordpress Plugin to build the E-learning course in our Wordpress site, we have tried to use a lightbox 'wp-colorbox' as recommended by a friend (he advised that the light box opens the files within the LMS page without showing the URL) but it did not work. Also when I right mouse click 'inspection' within the LMS page, I can still locate the URL of the story file, this means our E-learning courses can be accessed by any one who has the link. Can you recommend a solution? Many thanks. Sandy