Are images contained in LrC book pdfs read-only/protected from download?

[homerthedog]

I'm creating pdfs within the book module. I will be sending or posting the pdfs. I want the images within the pdfs to be protected from being individually or batch downloaded. Are they automatically protected or is there some preference I can set to make this so?

I'm in LrC 13.1 on a Windows machine.

[John R Ellis]

There's no practical, effective way to do it.

You can set the PDF's permissions using Adobe Acrobat to prevent copying, editing, or printing:

https://smallbusiness.chron.com/protect-adobe-acrobat-files-being-edited-copied-79392.html

But those permissions are easily circumvented:

https://apple.stackexchange.com/questions/409252/adobe-acrobat-ridiculous-document-protection-how-to...