better way to protect a pdf file

[warburg]

question as object!
currently in place of the exotic acrobat I use the cheapest skin pdf pro
It's not bad, I have to say. I would need to understand exactly what is the most effective way to protect a pdf, which for example cannot be opened with photoshop and so on.. .
Thanks
C

 

[AntonioV]

you can't open con photoshop

Maybe you mean "you can't change" with photoshop, since it's impossible to stop him from opening the regularly saved .pdfs. . .

I don't know in skin, but in acrobat there is a set of options to protect a .pdf so the question is: what non must be able to make the user who opens it?

:

 

[warburg]

Maybe you mean "you can't change" with photoshop, since it's impossible to stop him from opening the regularly saved .pdfs. . .

I don't know in skin, but in acrobat there is a set of options to protect a .pdf so the question is: what non must be able to make the user who opens it?

:

you are right, touché
I am interested above all that you can not edit it, i.e. extract pages, pictures, text, if not with a banal screenshot... cute pdf seems to me already good, for example when I set the options you see in the annex, at the opening with ps asks me the password, so I'm okay.
it was to understand if there is something better or more, even if I realize that it is impossible to reconcile the whole idea of the diffusion with that of a single "pure visibility" of the content

 

[AntonioV]

Compared to pro skin, acrobat also has a "electronic signature" protection, but your view is more than enough.

to test the "resistance" of the protections of pro skin, zipper and attach here your protected .pdf, which we look at.. .

:

 

[Marco74]

attention to software type pdf unlocker.

 

[warburg]

I'm proving to burn. ..

 

[AntonioV]

Advice: Increases 128-bit protection, so it's too easy. . .

:

 

[warburg]

Advice: Increases 128-bit protection, so it's too easy. . .

:

was already 128bit, for acrobat7.. . !
see then that I was right, it is practically a protection that does not serve anything

 

[PlannerRoad]

for pdf you have no escape.
if you want pdfs you should first print as an image and then one of the pdf of this. of course quality degrades.

 

[warburg]

for pdf you have no escape.
if you want pdfs you should first print as an image and then one of the pdf of this. of course quality degrades.

Yeah, I think everything gives me this:frown:
I trust in the creative commons license and the honesty of scholars

 

[PlannerRoad]

as a paliative, if your pdf printer reaches up to 128 bits, maybe you should find one that encrypts 256 bits. By the way, I saw that as an algorithm you used the aes, which from what I remember is one of the strongest.

...confidence in the creative commons license and the honesty of scholars

confide too much!

 

[AntonioV]

It is practically a protection that does not serve anything

In fact, and he thinks that I sprayed it with a freeware program, in an entirely innocent way.

If you give the customer static images, you're sure that it can derive data, both vector and raster.

If you give him an animation, well, you make it very difficult to extract data: Think about it.

:

 

[stef_design]

this kind of file, which I attach, is instead impossible to unlock.
only the classic university dispensers that download from the site of prof.
at the opening of the pdf you are asked for a password, if you do not know acrobat you bang out.
Moreover it is impossible to encrypt it.
if someone wants to quote:biggrin:

 

[warburg]

this kind of file, which I attach, is instead impossible to unlock.
only the classic university dispensers that download from the site of prof.
at the opening of the pdf you are asked for a password, if you do not know acrobat you bang out.
Moreover it is impossible to encrypt it.
if someone wants to quote:biggrin:

:biggrin::biggrin::
Well, sure, but so you can only spread it to a narrow circle of people... I need to spread a free magazine in pdf in academic college, and the strategy of having an opening pword would be lethal. . .
But I can think about it, thanks