How to apply DRM in PDF?

Hi, you can use VeryPDF DRM Protector to apply DRM to your PDF files and with these restrictions.

You should read this topic: https://community.adobe.com/t5/acrobat/how-to-set-a-pdf-expiry-date/td-p/9725055?page=1

Many PDF viewers ignore password restrictions, so if the file is readable you can't enforce anything. Certificate based security would at least prevent viewing by those who do not own the certificate, so that even if the file were shared, it couldn't be opened by a third party.

Items 4 and 5 are tough, even in a DRM solution. You would need to prevent screen shots, or even pictures of the screen from someone's iPhone. Usually, if that level of security is needed, you need to restrict access to particular computers in locked rooms, with other physical security.

There is no free or built-in DRM in Acrobat. Your client would need to purchase a DRM solution, LockLizard for example. Adobe also sells a highend enterprise level DRM solution. But there are a few out there, just google "PDF DRM"

Numbers 2-5 are controled in the PDF's File / Properties / Security settings.

Sample settings are below. Adjust to fit your needs.