Further to my previous message, I've checked things out a little further, and it would
appear that the 'security' setting in Acrobat use RC4 (40 bit) encryption, which would
explain the lack of 3rd party tools - up until recently a licensing fee would have
been required for the RC4 algorithm.
There are a few 3rd party tools available to batch process the security settings,
unfortunately they're all plug-ins for Acrobat Exchange, and carry price tags that
range from $300 to $3000.
Now that RSA has released their hold on the RCx encryption schemes perhaps some bold
developer will come up with a free (or affordable) program to do this. If I had the
skills I'd undertake it, as it's something I'd love to see available.
On a side note, I just noticed that Adobe now offers a 'Create a PDF Online' service
for a $10/month fee, not sure if you can set security, but they do offer a trial of 3
conversions. http://createpdf.adobe.com
> -----Original Message-----
> From: Tom Mathews [mailto:[EMAIL PROTECTED]]
> Sent: March 2, 2001 10:03 AM
> Cc: [EMAIL PROTECTED]
> Subject: Re: [PHP-WIN] How to create a Non-Editable PDF ?
>
>
> I'll look into this again - presumably its just a flag that gets
> set, which means that when you use php to generate a pdf, you
> could then reopen the file and insert the relevent flag. I wrote
> a postscript printer driver a little while back, so I should be
> able to figure out what form this will take - I'll post an answer
> when I've worked it out.
>
> Tom
> (alternatively, if you have distiller and have time to play, do
> something like create a document containing one character and
> save it. Save a new copy with the attibutes that you want set and
> do a binary comparrisson of the two).
>
> [EMAIL PROTECTED] wrote:
>
> > Adobe Acrobat has built in security features that allow
> restrictions on specific actions, including selecting text,
> editing the document, printing, etc... If you open up the
> document within Acrobat Exchange (the non-free PDF editor from
> Adobe) you can set those security preferences. Unfortunately I've
> never found a 3rd party program that lets you set those security
> preferences, rather odd consider Adobe has opened up the PDF format.
> >
> > Antonio, unfortunately the only way I know set the security on
> a PDF doc at this time is to buy a copy of Exchange and do it in there.
> >
> > I haven't tried pdflib, so it's possible that there is an
> option for the security settings.
> >
> > > -----Original Message-----
> > > From: Tom Mathews [mailto:[EMAIL PROTECTED]]
> > > Sent: March 2, 2001 3:12 AM
> > > To: PHP Windows lista
> > > Subject: Re: [PHP-WIN] How to create a Non-Editable PDF ?
> > >
> > >
> > > 1) Text
> > > It is a feature of Acrobat reader that you can take any pdf file
> > > and select text
> > > from it and copy this to a clipboard. The only way to prevent
> > > this is to use a
> > > version of Acrobat reader before 4.0! You should not be able to
> > > alter the text
> > > using acrobat reader (although using the full version of Acrobat,
> > > you should be
> > > able to 'touch up' any text that you feel like).
> > >
> > > 2) Adding Graphics
> > > Like 1), you will not be able to prevent anyone fom drawing on
> > > your document,
> > > however to prevent it from being saved, just set the read-only
> > > attribute to 'on'
> > > when you create the pdf file. (The user can of course turn this
> > > off it they
> > > download the file locally, but that's up to them!)
> > > Tom
> > > Antonio Lopez wrote:
> > >
> > > > When i create a PDF file with PHP, this file is editable with
> > > Acrobat Reader:
> > > > I.e. i can select all the text and copy & paste to another text
> > > processor.
> > > > I.e. i can draw a line or a rect on the pdf document, and save it.
> > > >
> > > > I want to create a Non-Editable PDF with PHP!
> > > >
> > > > How can i do this?
> > > >
> > > > ===================================================
> > > > Antonio López Luna
> > > > Ingeniería e Integración Avanzadas (Ingenia), S.A.
> > > > Parque Tecnológico de Andalucía
> > > > 29590 - Málaga (Spain)
> > > >
> > > > Tel. 34-952029300 Ext. 386
> > > > Fax. 34-952029309
> > > > Web: http://www.ingenia.es
> > > >
> > > > --
> > > > PHP Windows Mailing List (http://www.php.net/)
> > > > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > > > For additional commands, e-mail: [EMAIL PROTECTED]
> > > > To contact the list administrators, e-mail:
> [EMAIL PROTECTED]
> > >
> > >
>
>
smime.p7s
