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Password Protection bypassed by Mac Preview

We've created a password protected PDF and it works well, however, we recently learned that Mac Preview is able to open the PDF and ignore the password protection.

I don't have a MAC and I've searched high and low for this on Google to no avail... Need expert help.

Thanks!

Karl Heinz Kremer

This was a problem back in 2002 (http://www.planetpdf.com/mainpage.asp?webpageid=1976), but has since been fixed. Now you can even apply security settings in Preview. When you open a protected PDF document in Preview, you get a password dialog.
password-dialog.png

pmagony

ASKER

I read that article too, but the problem here is that we are in 2008 and this is a brand new MAC. The pdf is created on a windows machine using Adobe Acrobat Professional, then distributed accordingly.

Preview simply ignores the security implementations.

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pmagony

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Karl Heinz Kremer

What OS version is installed on that Mac?

pmagony

ASKER

My guess is "whatever Mac ships with today", since its a brand new laptop he is using. Perhaps Leopard, but I'm not 100% sure... this is my Client's, client.

Karl Heinz Kremer

Which version of Acrobat was used to create the protected file? I assume you verified on a Windows machine that the protection in the file is actually working.