ARCHIVED: At IU, how can I recover Windows encrypted files without a private key?
The Encrypting File System (EFS) is a component of the NTFS file system on Windows 2000, Windows XP Professional, and Windows Server 2003, and it allows users to encrypt files stored on their local computer or on a Windows 2000 or 2003 server. The encryption and decryption process requires either a private key stored in the user's profile, or a master recovery key stored by a designated "recovery agent". Users who choose to encrypt their files with EFS should always make backups of their private keys for safekeeping. In an emergency, such as a hard drive crash that removes or corrupts a user's private key, the master recovery key can restore encrypted files.
At Indiana University, the University Information Policy
Office (UIPO) maintains a master recovery key for the IU
Active Directory. If you forget a key or if your key is
damaged, UIPO can use this domain master key to help you recover your
own files. However, this is only possible if the file resides on a
computer joined to the ADS domain and the user who encrypted the file
is a domain user. If your computer does not belong to ADS, then your
department's IT Pro or other representative might be able to
recover department or user documents, subject to institutional
guidelines. In either case, contact UIPO at
uipo@iu.edu
. If your request meets the
guidelines set out in Policy
IT-07: Privacy of Electronic Information and Information Technology
Resources, and any other applicable IU policies, UIPO will contact
you and explain how to proceed.
Generally, the support provider makes a Windows Backup copy of the encrypted file and gives a media copy to UIPO, which will then recover the file and return it using unencrypted, read-only media.
IT Pros who administer organizational units (OUs) can choose to disable file encryption entirely.
For help with server administration, registered IT Pros at IU can email Support Center Tier 2.
For more on the Encrypting File System, see the Microsoft TechNet article The Encrypting File System.
This is document aknh in the Knowledge Base.
Last modified on 2018-01-18 13:23:31.