Re: How to decrypt EFS-protected restored files?
From: karen (k_at_nowhere.com)
Date: 05/09/04
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Date: Sat, 8 May 2004 18:42:34 -0700
"*Vanguard*" <no-email@reply-to-newsgroup.invalid> wrote in message
news:efGdnYYzL5GFqgHdRVn-jg@comcast.com...
> I had a directory configured to use EFS (so anything put under it got
> encrypted). I export my EFS certificate to a floppy. My system crashed
and
> a disk image wouldn't work (because of changes in the hardware). However,
I
> could still use the ImageExplorer that comes with DriveImage to peruse the
> contents of the image files to extract files out of them. So I've tried
the
> following:
>
> - Extracted the files from disk image. Cannot view them because of the
EFS
> protection. Imported the EFS certificate used when the files got
encrypted.
> It was imported under the Personal store for certificates. Could not open
> the files.
>
> - Deleted the EFS certificate and re-imported it but this time left the
> option selected to have Windows XP automatically determine under which
> certificate store to place the certificate. It imported it to the Trusted
> People certificate store. Still couldn't access the encrypted files.
>
> - Figuring that EFS had not yet been implemented on my new install and
that
> maybe the imported EFS certificate would not get exercised until EFS was
> used, I right-clicked on a folder and had it encrypted. Then I copied the
> files to under this directory figuring that the certificate might also
have
> to be imported before moving the files into an EFS-protected directory.
> Still cannot access the file contents.
>
> I've read several KB articles and the included help but it really never
> describes the steps in restoring EFS-protected files, the order of
importing
> the EFS certificate (before or after the files have been restored to the
new
> instance of Windows), or if importing the EFS certificate after restoring
> the files (or before) would allow access to them (or if I also need to
> actually implement EFS to have it utilize the imported certificate). I
see
> mention of how use EFS, export certificates, manage them, import them, and
> some vague inferences in using them against encrypted files but no real
> instructions. After a few hours, I've exhausted what I could come up for
a
> procedure to decrypt these files. Any ideas?
One thing you can try is to import your certificate to another computer
running XP Pro and copy your encrypted files to that computer and you should
be able to view them. It doesn't fix your problem but at least you should be
able to recover your files.
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