Is there such software?

I convert online and protect PDFill PDF Tools. About 500 files, they are in folders, there are also subfolders.

PS Already converted:

Наличие LibreOffice example: lowriter --convert-to pdf *.doc or *.docx or *.rtf

Now you need to protect against copying, etc.
There is software under Windows, but it is paid, and you can select only 1 file.

upd: a software was written that launches one encoder that has a console interface, but since he paid, he puts watemark

  • Protecting a file from being copied is one file in the header that prevents the viewer from copying. Linux viewers look at this flag as something extra and just ignore. I see no reason to pay for this. - KoVadim

1 answer 1

I can make an unreadable PDF and for it a viewer, which is the only one that can open such documents.

Well, or you can offer the original encrypted packer-extractor PDF content. Guaranteed, no one will read except you.

Well, if it's free, you can use the standard Adobe methods - content signatures, encryption and security flags.