RE: [PHP-WIN] How to create a Non-Editable PDF ?

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:Tom.MATHEWS@st.com] > Sent: March 2, 2001 10:03 AM > Cc: php-windows@lists.php.net > 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). > > sillyboy@mindless.com 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:Tom.MATHEWS@st.com] > > > 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: php-windows-unsubscribe@lists.php.net > > > > For additional commands, e-mail: php-windows-help@lists.php.net > > > > To contact the list administrators, e-mail: > php-list-admin@lists.php.net > > > > > > > >

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