Document Encryption in Office 2007 with Open XML

re: Document Encryption in Office 2007 with Open XML

GrayKnowlton — Tue, 16 Sep 2008 18:40:26 GMT

Hi hAl,

thanks for the tip, I'll check it out and well get the paper updated.

Gray

re: Document Encryption in Office 2007 with Open XML

hAl — Mon, 15 Sep 2008 16:14:18 GMT

[quote]The second option does not use any encryption.[/quote]

That is actually not totally correct.

Encryption is still used to store the password.

re: Document Encryption in Office 2007 with Open XML

Jesper Lund Stocholm — Wed, 03 Sep 2008 20:41:14 GMT

Hi Gray,

I think it is great that Microsoft has finally documented how Microsoft Office 2007 handles encryption of OOXML-documents. The information until now has been nothing more than "Microsoft Office 2007 uses the Office CryptoAPI" and that was pretty much it.

The documentation will help the rest of us figure out what Microsoft Office 2007 actually does when protecting a document, and as I wrote some time ago on my blog at http://idippedut.dk/post/2007/09/18/Password-beskyttelse-af-en-OOXML-fil.aspx (sorry, in Danish) quite a lot of information is needed expecially when it comes to the functionality in the Office Crypto API that Microsoft Office 2007 doesn't support.