I need help - I can help - Doc Properties changing on secured pdf

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Doc Properties changing on secured pdf

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=284
Printed Date: 04 May 24 at 11:59AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Doc Properties changing on secured pdf

Posted By: bogey
Subject: Doc Properties changing on secured pdf
Date Posted: 24 Jan 06 at 3:33PM

I have a process that merges multiple PDF files together, then sets properties for the Author, Title, subject, creator and producer (using the QP.SetInformation() method.

Form fields are filled, using QP.SetFormFieldValue and other field property settings.

PDF Permissions are set using QP.Permissions(Allow Print, no copy, no change, add notes, fill fields, no copyaccess, yes assemble, can print).

QP.Encrypt with a password is used (40bit), then QP.CompressContent() before finally delivering the PDF to the browser.

The file properties in Acrobat diplay exactly what I set until the user does a "save as", after which the properties revert back to what the original file used to have.

How is it that the old properties are still in the file? Shouldn't securing the PDF prevent changes like this? How can these be locked down?

Any insight is appreciated.

Thanks,

KEN

Replies:

Posted By: Ingo
Date Posted: 24 Jan 06 at 5:07PM

Hi Ken!

You can set the document properties to prevent this menupoint... or you can prevent the whole menu.

Best regards,
Ingo

Posted By: bogey
Date Posted: 25 Jan 06 at 7:14AM

I am not referring to the menu option. I want to set and lock the document properties. Setting permissions to "No Change" should prevent it from being modified.

Why would the PDF retain old settings and revert back to old setting when the PDF is resaved?