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
[Solution] How to Protect Digital Books and PDFs with DRM: Device Binding, Expiration, Copy Prevention, and License Control Using VeryPDF DRM Protector
When distributing digital publications, especially sensitive works such as academic materials, research, or exclusive books, one of the greatest challenges is ensuring that access is strictly controlled. Publishers and authors want to allow readers to enjoy their work, but at