If you use a PDF DRM system to protect books, courses, training materials, or paid documents, you may run into this problem: You delete an old PDF, upload a new version, and your existing users can no longer see the
How to Protect CFA Study Materials from PDF Sharing, Reselling, and Unauthorized Downloads
A CFA exam study material provider recently contacted us with a very common problem. He runs a small two-person business that creates study and review materials for people preparing for the Chartered Financial Analyst (CFA) exams. His products include PDF
How to Limit a PDF to 1 or 2 Devices Per Customer, Create Secure Reading Links, and Prevent PDF Sharing
If you sell PDF ebooks, training materials, manuals, reports, or other digital documents, you may want each customer to read the PDF on only one or two devices. For example, you may want: Customer A to use the PDF on
How to Invite PDF Readers and Send Secure Reading Links
If you sell or distribute ebooks, PDFs, training materials, or other digital books, managing reader access can become difficult. You may need to give each customer a personal reading link, limit the number of devices they can use, and send
How to Limit a PDF to 2 Devices and Stop eBook Sharing: Device Limit Per User or Per Book?
If you sell an eBook, training PDF, certification manual, or other digital document, you may want to give each customer access on 2 devices only. For example, a customer may want to read the eBook on a laptop and a