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Windows 2000 COMPRESS, ENCRYPT
Compress
Windows 2000 uses compression similar to
DriveSpace in windows 98, but unlike DriveSpace
which compress entire volumes, it can compress
individual files and folders.
You can compress files and folders only on
drives formatted with NTFS, also compressed
files and folders cannot be encrypted
If you add or copy a file into a compressed
folder, it is compressed automatically. If you
move a file from a different NTFS drive into a
compressed folder, it is also compressed.
However, if you move a file from the same NTFS
drive into a compressed folder, the file retains
its original state, either compressed or
uncompressed.
To compress a file or folder
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In explorer select the file or folder you
want to compress, choose properties
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Check the Compress contents to save disk
space box
To remove compression from a file or folder,
follow directions above and uncheck the Compress
contents to save disk space box
Encrypt
Windows 2000 includes greater security than
other versions of windows, with its Encrypting
File System (EFS). It is based on public and
private key encryption. The file system
automatically generates an encryption
certificate for the user along with a private
key. You can encrypt individual files or
folders, only on the NTFS file system.
When a user is logged on, they don't have to
decrypt files to use them EFS automatically
detects an encrypted file, locates the users
private key and decrypts the file.
To encrypt a file or folder
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In explorer select the file or folder you
want to encrypt, choose properties
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Choose advanced button to display the
advanced attributes
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Check the Encrypt Contents To Secure Data
box
To remove encryption from a file or folder,
follow directions above and uncheck the Encrypt
Contents To Secure Data box.
You can also encrypt file and folders from the
DOS command prompt using cipher.exe If
you do not use any command line options cipher
will just display the encryption status of the
folder.
cipher [/e | /d] [/s:dir] [/i] [/q] [dirname]
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/e Encrypts specified directory
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/d Decrypts specified directory
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/s : dir Specifies the directory to encrypt
or decrypt
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/i Ignors errors
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/q Specifies a directory
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dirname
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