Ray Rashif <schivmeis...@gmail.com> writes: > On 8 August 2013 17:51, Rainer M Krug <rai...@krugs.de> wrote: >> Just one word of caution: if you can see the text on screen, you can >> extract it by taking a screenshot and using ocr (optical character >> recognition) and nothing will stop you. So this just makes it slightly >> more difficult to get the text. > > What's more, if I'm not wrong, encryption depends on the reader having > support, so you can effectively render encryption useless by using a > very old reader and PDF format. Even GhostScript lets you bypass > encryption, though not intentionally.
I might be wrong, but I think even okular had an option (!) to enable or disable to respect the restrictions. > > It's really all about preventing frequent abuse of documents by lay > people. Someone with the intent _will_ get your text somehow or > another. There are many tools that person could employ. Absolutely - but I think the problem are not the lay people, but rather the "expert copier" who knows how to do it. Cheers, Rainer > > > -- > GPG/PGP ID: C0711BF1 > -- Rainer M. Krug email: RMKrug<at>gmail<dot>com