If you want to authenticate your version, you might just distribute a sha256sum with your PDF.
You can't really stop someone from creating a modified facsimile that looks (mostly) the same. They could print it, paste text on top of yours and scan it back into a new PDF. -- Russell Senior [email protected] On Fri, Jun 19, 2026, 07:09 Rich Shepard <[email protected]> wrote: > I've not before used pdftk to encrypt a file. I want anyone to open, read, > and print the file, but not modify it in any way. > > Reading `pdftk --help' I don't see that specific set of criteria. > > Is pdftk the best tool for this? If so, what would be the appropriate > command? If not, what tool should I use? > > TIA, > > Rich >
