So far as I can find out, this can't be done. And it would be fairly
pointless anyway, as there are so many other ways to save a PDF. If a
file is on the web, it can be saved, and that's that.
----------------------------------------
Aandi Inston qu...@dial.pipex.com http://www.quite.com
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"Aandi Inston" <qu...@dial.pipex.com> wrote in message
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You might look at FileOpen (http://www.fileopen.com/publisher.html) and
see if
it provides what you want.
Helge
--
H.Bli...@srz-berlin.de
H.Bli...@srz-berlin.com
H.Bli...@acm.org
If they can see it without the watermark,
they can save and print it.
Even if you get the server and display client parts
working the way you want, it still doesn't prevent
saving/printing. For example...
On the two PCs I use primarily, I can set the Matrox
graphics card to 2400Vx1920H large logical desktop
mode, and use the PrntScrn key to save the unmarked
preview pages to the clipboard, one at a time, in
24-bit color and at well over 200dpi (i.e. photo quality).
Although the text becomes graphics, it's straightforward
trim the window border and to print the clipboard or
even re-assemble the captured pages as a new PDF
document with no watermarks.
This works even if you disable selecting-graphics-and-text
in the PDF security, since Acrobat doesn't control the
function of the [PrtScrn] key in Windows - nor the
screen-cap capability of any other OS. If you don't
disable selecting, then the user can even more easily
capture just the page content, and at resolutions
over 300 dpi (up to the 32MB/page graphics object
limit of Win32).
I suspect that numerous scripting engines would enable
automation of rapid capture of an entire document.
A creative Win32 driver hacker can further enhance the
hijacking by writing code to capture the GDI traffic,
if not the actual LAN PDF traffic.
Bottom line. For an e-document to be truly secure, the
viewer app must have total control over the client
operating environment. Acrobat Reader doesn't.
You may need to consider delivering watermarked display
copies, perhaps even with the wm visibly customized to the
verified registered user.
It's not clear to me that credible DRM for edocs is here yet.
Regards, 3404 East Harmony Road, MS-K4
Bob Niland Fort Collins CO 80528-9599
Hewlett-Packard mailto:r...@fc.hp.com
Unless otherwise stated, the above are personal opinions,
and do not represent the position of Hewlett-Packard.
"Robert J. Niland" <r...@fc.hp.com> wrote in message
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