Serious problem Decrypting xp files

  • Thread starter Thread starter Gijs
  • Start date Start date
G

Gijs

Dear people,

I needed to re-install xp pro on NTFS. But I had some
folders that were encrypted. Now they are not accessable
anymore.
It seems that the key that is now installed with xp
doesn't correspont with the one the files are encrypted
with. So my problem is that I can't access the files
anymore. Is there anyone who can help me with this?
Regards,

Gijs
 
Gijs said:
Dear people,

I needed to re-install xp pro on NTFS. But I had some
folders that were encrypted. Now they are not accessable
anymore.
It seems that the key that is now installed with xp
doesn't correspont with the one the files are encrypted
with. So my problem is that I can't access the files
anymore. Is there anyone who can help me with this?
Regards,
Click to expand...

Gijs,

If you did not backup/export the relevant encryption keys (either yours or
the recover agent - if you created one) then those files will not be
accessible.

Do you have a full backup of the user account profile prior to your
reinstall ?
--

Regards,

Mike
--
Mike Brannigan [Microsoft]

This posting is provided "AS IS" with no warranties, and confers no
rights

Please note I cannot respond to e-mailed questions, please use these
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Mike,

No i did not. But there must be a way to get those files
decrypted again i assume?

Gijs
 
No..your files are gone forever without the key. The strength of the
encryption algorithm is such that it cannot be broken. You must *ALWAYS*
make a backup of your encryption key, and keep it safe.

Live and learn....

Bobby
 
Mike,

No i did not. But there must be a way to get those files
decrypted again i assume?
Click to expand...

An encryption system where you could decrypt the files easily without the
appropriate keys is not much use.
The encryption techniques used (a combination of symmetric and asymmetric
key techniques) results in a fast and strong system.
It is not possible to access those files without access to significant
computing resources to attempt a brute force crack of the appropriate Data
Decryption Field.


--

Regards,

Mike
--
Mike Brannigan [Microsoft]

This posting is provided "AS IS" with no warranties, and confers no
rights

Please note I cannot respond to e-mailed questions, please use these
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There are numerous documents available about the creation of a recovery key
and the procedures for the export and import of the those keys.
see
http://support.microsoft.com/default.aspx?scid=kb;en-us;255742
and
http://support.microsoft.com/default.aspx?scid=kb;en-us;223316

http://www.microsoft.com/technet/prodtechnol/windows2000serv/howto/efsguide.mspx

and most important

http://www.microsoft.com/resources/...Windows/XP/all/reskit/en-us/prnb_efs_qutx.asp

--

Regards,

Mike
--
Mike Brannigan [Microsoft]

This posting is provided "AS IS" with no warranties, and confers no
rights

Please note I cannot respond to e-mailed questions, please use these
newsgroups
 
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