How can I decrypt a Microsoft Word document for which I have the key?

How can I decrypt a Microsoft Word document for which I have the key?

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Subject Author Date
How can I decrypt a Microsoft Word document for which I have the key? Meitar 03-19-2006
Posted by Meitar on March 19, 2006, 3:13 am
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Hi all,

I'm rather a novice when it comes to security concerns in the Microsoft
realm, so please bear with me. Here's my situation:

A friend has an old Microsoft Word (97+, I am guessing) document for
which she has set an "open document password." That is, the file is
password-protected and encrypted. She has forgotten the password for
the file and now needs to open it, but can't without cracking the
security protection she has already placed on it. I have never before
even attempted anything like this, but figuring it a good opportunity
to learn something I took it upon myself to see if I could help.

My research uncovered a plethora of Windows-based tools (applications)
which promise to recover the password if I buy the full version of the
program, but since this task is largely for my own edification it would
be utterly pointless just to pay for a program. Nevertheless, I tried
to the demo versions of plenty of these programs. One proved fruitful:
it has managed to recover the encryption key used on the document.

So now I have learned several things about the Word document. Firstly,
the password is more than five characters long. Secondly, that it is
likely a "modern" version of Microsoft Word. Thirdly, and I am assuming
most helpful, I know the precise encryption key.

Knowing these things, especialy the encryption key, how can I now
decrypt the document and read its contents?

Thanks in advance for pointing me in the right direction.
Regards,
-Meitar


Posted by =?Utf-8?B?UGFuZGFfbWFu?= on March 19, 2006, 4:08 am
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My reply is at the bottom of your message :

"Meitar" wrote:

> Hi all,
>
> I'm rather a novice when it comes to security concerns in the Microsoft
> realm, so please bear with me. Here's my situation:
>
> A friend has an old Microsoft Word (97+, I am guessing) document for
> which she has set an "open document password." That is, the file is
> password-protected and encrypted. She has forgotten the password for
> the file and now needs to open it, but can't without cracking the
> security protection she has already placed on it. I have never before
> even attempted anything like this, but figuring it a good opportunity
> to learn something I took it upon myself to see if I could help.
>
> My research uncovered a plethora of Windows-based tools (applications)
> which promise to recover the password if I buy the full version of the
> program, but since this task is largely for my own edification it would
> be utterly pointless just to pay for a program. Nevertheless, I tried
> to the demo versions of plenty of these programs. One proved fruitful:
> it has managed to recover the encryption key used on the document.
>
> So now I have learned several things about the Word document. Firstly,
> the password is more than five characters long. Secondly, that it is
> likely a "modern" version of Microsoft Word. Thirdly, and I am assuming
> most helpful, I know the precise encryption key.
>
> Knowing these things, especialy the encryption key, how can I now
> decrypt the document and read its contents?
>
> Thanks in advance for pointing me in the right direction.
> Regards,
> -Meitar
>


Hello Meitar ! You are posting your question in Security newsgroup but more
appropriate would be to post in another group . Microsoft has established
special newsgroups for its Office Pack .
Post in the Word newsgroups.

"MS Word General Questions" newsgroup
NTTP:
microsoft.public.word.docmanagement

HTTP
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.public.word.docmanagement&cat=en_US_ce704816-2055-4ee8-a8f1-2496ab2e29d3&lang=en&cr=US



Regards :
Panda_man

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