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Topic: Password protection in PDF ; RC4 encryption in PDF
Conf: (P-PDF) Developers, Msg: 55184
From: mitadalal
Date: 5/29/2002 05:10 PM

Hi All,

I would like to know this :-

1) How do we know whether a PDF file is password protected ?

2) If we're able to open a PDF file in Acrobat viewer,
without entering a password, then can we conclude that it is not password protected ?

3) I have come across PDF files in which strings and
streams are encrypted using RC4 ; yet it requires no
password to open it . Can somebody tell me how to generate this kind of files ?

4) How can we specify the owner-password for a PDF file ?

--Mita.

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