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Topic: Re: Expire a PDF
Conf: (P-PDF) Developers, Msg: 57034
From: Deleted User
Date: 5/29/2002 05:23 PM

Bob,

the approach you have chosen is reasonable. There are a few comments to add.

You can use Acrobat 3 _if the Acrobat Forms v.3.5 plug-in is installed_.
This plug-in should be downloadable from the Adobe FTP server.

You can save a document in Acrobat 4 with such a cover up field visible
when you activate it and save the document in the Forms view.

Hope, this can help.


Max Wyss
PRODOK Engineering
Low Paper workflows, Smart documents, PDF forms
CH-8906 Bonstetten, Switzerland

Fax: +41 1 700 20 37
e-mail: mailto:prodok@prodok.ch



[ Building Bridges for Information ]


______________________





>Is there a way to prevent users from reading a PDF with Reader 3.x or
>lower (file created from Acrobat 4)?
>
>Can you make a PDF file expire after a certain date?
>
>The following describes my attempt in making a PDF file expire after a
>certain date:
>
>I created a Javascript that expires a document once the current date
>meets or exceeds the expiration date contained in a field. The script is
>activated via a page action (OPEN) and sends you back to the first page if
>the document is exipred. This was done with Acrobat 4.
>
>All worked well with Acrobat 4 and Reader 4, but did not work with Reader
>3 since it does not understand Javascript. I then tried placing a field
>in front of the the entire page. The field covers the contents via a page
>action to show the field, preventing one from looking at the contents
>(works with Reader 3). A Javascipt hides the field when opened with Reader
>4, Reader 3 cannot hide the field since the Javascript does not work.
>
>This all worked except that when you opened the file (change security in
>place) with Acrobat 4 then saved it. This process makes the field hidden
>and the file can be read by Reader 3 afterwards. Security does not prevent
>one from saving over the file.....
>
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>
>Paper-to-PDF alternatives: Read the review
>http://www.planetpdf.com/mainpage.asp?WebPageID=507
>
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