If you sell or share protected PDF files, user control is not optional. You need to decide what happens when a user’s access time ends. Should they lose access immediately? Should their account stay but be blocked? Or should everything
Securing PDF Files: Viewing on Just One PC, Single-Machine Access, and True PDF DRM Options
* Securing PDF files: Viewing on just one PC possible? * Can I limit a PDF to be open on only one machine at a time? * How to make a PDF file only open at 1 computer but not