Protecting a PDF while still allowing printing is a sensitive decision in any DRM workflow. Before enabling printing, it is absolutely critical to understand the security implications. Once printing is allowed, the document can be printed to a virtual printer,
How to Secure and Lock PDF Files to IDE, SCSI, or USB Hard Drives Using WMIC Serial Numbers and VeryPDF DRM Protection
If you want to protect your PDF files and ensure they can only be opened on a specific hard drive or USB drive, you can use hardware-based DRM. One of the most reliable ways to achieve this is by obtaining