PDF Copy Protection: How to lock a PDF file to a special hard disk?
We have received following questions from our users, How to protect pdf file from copying? How to lock a pdf so it cannot be copied?...
Tag: pdf security
PDF Encryption and PDF Decryption options in PDF Toolkit Command Line software
PDF Toolkit Command Line software https://veryutils.com/pdf-toolkit-command-line-tools-and-utilities Chapter 4 PDF Encryption and PDF Decryption4.1 Introduction . . . . . . . . . . ....