If you need to send confidential PDF files to customers, students, employees, partners, or other authorized users, a normal PDF password may not provide enough control. A PDF can be copied, forwarded, uploaded to another computer, or shared with someone
Maximum Named Users vs Maximum Anonymous Viewers: Which DRM License Do You Need to Sell PDF User Manuals?
If you sell PDF user manuals online, one of the first questions you will have is this: Do I need to create one account for every customer, or can I let everyone use the same login? The answer depends on