OK Thank you for that useful link.
On 12/23/14, Tilman Hausherr <[email protected]> wrote: > Unless I've misunderstood something, it means that the Ubuntu Document > Viewer is a non-compliant PDF viewer. > > PDF does not really protect against printing. See e.g. here: > https://www.cs.cmu.edu/~dst/Adobe/Gallery/anon21jul01-pdf-encryption.txt > > The goal of protecting a PDF file is typically something like this: > you want a viewer application to be able to display the file but not > be able to print it. (PDF has additional options to disallow > copy-and-pasting text and editing the file; the same argument applies > to them.) The problem here is that exactly the same information is > used for both functions -- once you have a (decrypted) page > description, it can be turned into either pixels on the screen or > toner dots on a printed page. > > > > Tilman > > Am 23.12.2014 um 17:14 schrieb Мэхди Эсмаилпур: >> Yes,i use version 1.8.8. >> I test it in Foxit Reader.Foxit show secured pdf and don't allow >> printing,commenting and ... >> Exists any solution to fix Document Reader problem? >> >> On 12/23/14, Tilman Hausherr <[email protected]> wrote: >>> Hi, >>> >>> 1. Your text sounds like the document viewer in Ubuntu is the cause. >>> What happens if you try to print that pdf with Adobe Reader? >>> 2. What version are you using? The correct one should be 1.8.8. >>> >>> Tilman >>> >>> Am 23.12.2014 um 16:52 schrieb Мэхди Эсмаилпур: >>>> Hi all, >>>> >>>> I use pdfbox to encrypt a pdf file.after encryption process i use >>>> pdfinfo to verify encryption and pdfinfo said : >>>> >>>> Encrypted: yes (print:no copy:no change:no addNotes:no) >>>> >>>> problem is in the print to file!when i open secured PDF in Document >>>> Viewer in Ubuntu i can print pdf to another pdf file and create >>>> unsecured file. >>>> >>>> Any solution for this problem? >>>> >>>> Thank you guys >>> > >
