How to Batch Processing to Remove Security?

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I have over 5,000 documents on which I want to remove security so that I can add a watermark and then re-secure the documents. I have a way to use batch processing to secure the documents, however I am unable to find a way to use batch processing to remove the security. Creating security is done through the Document / Security / Restrict Opening and Editing menu and Batch Processing handles this just fine. Removing security is accomplished via the File / Document Properties / Security Settings menu and batch processing doesn't know how to do that ( I think)!!!. Does anyone have any suggestions? Am I missing something here? Any ideal?

Use A-PDF Password Security (free download here)

1. Launching the application: A-pdf Password Security
2. Select the option Batch PDF Documents Security and push the button Next > , a file list window will be opened.
3. You can add files or even Add Dir for add all of files in a directory in there. you also can remove or clear files in list.
4. After finished adding pdf files, you can click "try password" button, then A-pdf Password Security will try to open the pdf documents which have open password security by using password pool, password pool is a password list which saved common password that can be defined by user.
5. Push the button Next > , a Security Option Window will be opened. where set "Add Security" checkbox values to false
6. Clicking "Save" or "Save as ..." button to add batch decrypt PDF files

This web tutorial will give you an overview of the product and understanding of how easy to use it!

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