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You have selected free tutorial of the Microsoft Corporation for the Microsoft Technology Associate (MTA) :
98-349: MTA: Windows Operating System Fundamentals : Module 4: Managing Applications, Services, Folders, and Libraries :
Encrypting and Compressing Files and Folders
Microsoft Help:-
If you need to protect files on your system from being read by unauthorized users, you can use the
Encrypted File System (EFS) feature that works independently of the NTFS permissions. Note that
Windows 7 Home Basic, Home Premium, and Starter Edition do not fully support EFS (search
Windows Help and Support for information on using EFS data with these versions). When a file is
encrypted, the data stored on the hard disk is scrambled in a very secure way. Encryption is transparent
to the user who encrypted the file; you do not have to "decrypt" an encrypted file before
you can use it. You can work with an encrypted file just as you would any other file; you can open
and change the file as necessary. However, any other user or an intruder who tries to access your
encrypted files is prevented from doing so.
Only the original owner and the computer’s designated
recovery agent can get into encrypted files. Anyone else receives an "Access Denied" message
when trying to open or copy your encrypted file. Folders can be marked as encrypted, too. This means that any file created in or copied to an
encrypted folder is automatically encrypted. The folder itself isn’t encrypted, though; anyone with
the proper file access permissions can see the names of the files in it.
Encrypting Offline Files
Offline files are stored local copies of network files provided so that you may work with certain
types of information when you’re offline or disconnected from the network. These files are not
encrypted by default, but you can enable a new feature in Windows 7 that provides this added
safety measure.
File encryption provides another level of access protection that—like EFS—operates independently
of NTFS permissions. This safeguards your files in the event your drive is removed or the entire system
is stolen. You should especially encrypt offline files if you suspect they will contain confidential,
private, or sensitive information.
You can enable encryption of offline files by clicking the Encrypt button on the Encryption tab of the
Offline Files dialog box. To encrypt offline files, you must first enable offline
files on the General tab of a given folder or launch Manage Offline Files from the Start menu using
the Search box.
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