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Re: PDF is blocked for printing, etc. OK for acroread (it behaves as expected), but KPDF allows me to print it, even if it is protected! Why?



Gunnar Wolf wrote:
> Russ Allbery dijo [Mon, Apr 19, 2010 at 02:14:21PM -0700]:
>   
>
> The reasons not to want a document printed are quite easy to
> understand, but the mechanism is flawed.
/
> Given the setting you
> mention, you can just slap a red banner stating "Confidential, do not
> print". If it is on a corporate setting, just state it as a policy -
> and if somebody fails to comply with the policy, there should be
> sanctions.
>   
That is not for an enterprise stuff (at least if you do not consider the
universities as enterprises), but I slapped such a banner (here, this is
only a simple watermark). But there are also different ways to remove a
watermark...
> Of course, somebody interested in printing the file will do it. Either
> by his own means or, like my users, by mailing the "techie" the
> document asking him to unprotect it. Or by sticking it on a USB key
> and taking it off-site to a location they can freely tinker with.
>   
Sure. But one hopes the measures to be deterrent! That is one of the
only thing we can rely on with a given amount of certitude.
> As I said on my previous mail: If you don't want it to be printed,
> distribute in a way that makes it hard to be useful when
> printed.
Sure, but how? (For the next time, if any.) They need(ed) to read it,
and it must be sufficiently `high-res.'
>  Don't you trust somebody with social security numbers and
> salary information? Don't give it to them.
>   
No choice. I am not the supervisor of the course.


-- 
Merciadri Luca
See http://www.student.montefiore.ulg.ac.be/~merciadri/
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