How to create a read-only and/or rasterized PDF

Hi, I would like to make it a bit harder to alter and machine read the pdf’s we generate. Maybe I did not look good enough but I did not see anything in the market place. Does anyone of you have any experience or solutions on how to make it a combination of read-only and/or rasterized.  In our use case a user have no reason to change the pdf once it is created by the platform. Kind regards Johan
1 answers

If you rasterize won’t that cause accessibility issues for those that use screen readers and assistive technologies? I would have thought that machine readability was an important feature to have.