In addition to using EFS from the explorer GUI, the CIPHER command is provided to encrypt or display the encryption
of folder and files on an NTFS partition.
Notes: If you encrypt a folder, all its' files and sub-folders are encrypted.
EFS does not work on on an object that has the System attribute.
EFS does not work on on a compressed object.Typing
cipher /?, at a command prompt, displays:
Displays or alters the encryption of directories \[files\] on NTFS partitions.
CIPHER \[/E | /D\] \[/S:dir\] \[/A\] \[/I\] \[/F\] \[/Q\] \[/H\] \[/K\] \[pathname \[...\]\]
/E Encrypts the specified directories. Directories will be marked
so that files added afterward will be encrypted.
/D Decrypts the specified directories. Directories will be marked
so that files added afterward will not be encrypted.
/S Performs the specified operation on directories in the given
directory and all subdirectories.
/A Operation for files as well as directories. The encrypted file
could become decrypted when it is modified if the parent directory
is not encrypted. It is recommended that you encrypt the file and
the parent directory.
/I Continues performing the specified operation even after errors
have occurred. By default, CIPHER stops when an error is
encountered.
/F Forces the encryption operation on all specified objects, even
those which are already encrypted. Already-encrypted objects
are skipped by default.
/Q Reports only the most essential information.
/H Displays files with the hidden or system attributes. These
files are omitted by default.
/K Create new file encryption key for the user running CIPHER. If this
option is chosen, all the other options will be ignored.
pathname Specifies a pattern, file or directory.
Used without parameters, CIPHER displays the encryption state of
the current directory and any files it contains. You may use multiple
directory names and wildcards. You must put spaces between multiple
parameters.
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