cipher

File Encryption Utility

File Encryption Utility


cipher

  • C:\Windows\system32\cipher.exe /?

Output:

Displays or alters the encryption of directories [files] on NTFS partitions.

  CIPHER [/E | /D | /C]
         [/S:directory] [/B] [/H] [pathname [...]]

  CIPHER /K [/ECC:256|384|521]

  CIPHER /R:filename [/SMARTCARD] [/ECC:256|384|521]

  CIPHER /P:filename.cer

  CIPHER /U [/N]

  CIPHER /W:directory

  CIPHER /X[:efsfile] [filename]

  CIPHER /Y

  CIPHER /ADDUSER [/CERTHASH:hash | /CERTFILE:filename | /USER:username]
         [/S:directory] [/B] [/H] [pathname [...]]

  CIPHER /FLUSHCACHE [/SERVER:servername]

  CIPHER /REMOVEUSER /CERTHASH:hash
         [/S:directory] [/B] [/H] [pathname [...]]

  CIPHER /REKEY [pathname [...]]

    /B        Abort if an error is encountered. By default, CIPHER continues
              executing even if errors are encountered.
    /C        Displays information on the encrypted file.
    /D        Decrypts the specified files or directories.
    /E        Encrypts the specified files or directories. Directories will be
              marked so that files added afterward will be encrypted. 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.
    /H        Displays files with the hidden or system attributes. These files
              are omitted by default.
    /K        Creates a new certificate and key for use with EFS. If this
              option is chosen, all the other options will be ignored.

              Note: By default, /K creates a certificate and key that conform
                    to current group policy. If ECC is specified, a self-signed
                    certificate will be created with the supplied key size.

    /N        This option only works with /U. This will prevent keys being
              updated. This is used to find all the encrypted files on the
              local drives.
    /R        Generates an EFS recovery key and certificate, then writes them
              to a .PFX file (containing certificate and private key) and a
              .CER file (containing only the certificate). An administrator may
              add the contents of the .CER to the EFS recovery policy to create
              the recovery key for users, and import the .PFX to recover
              individual files. If SMARTCARD is specified, then writes the
              recovery key and certificate to a smart card. A .CER file is
              generated (containing only the certificate). No .PFX file is
              generated.

              Note: By default, /R creates an 2048-bit RSA recovery key and
                    certificate. If ECC is specified, it must be followed by a
                    key size of 256, 384, or 521.

    /P        Creates a base64-encoded recovery-policy blob from the passed-in
              certificate. This blob can be used to set DRA policy for
              MDM deployments.
    /S        Performs the specified operation on the given directory and all
              files and subdirectories within it.
    /U        Tries to touch all the encrypted files on local drives. This will
              update user's file encryption key or recovery keys to the current
              ones if they are changed. This option does not work with other
              options except /N.
    /W        Removes data from available unused disk space on the entire
              volume. If this option is chosen, all other options are ignored.
              The directory specified can be anywhere in a local volume. If it
              is a mount point or points to a directory in another volume, the
              data on that volume will be removed.
    /X        Backup EFS certificate and keys into file filename. If efsfile is
              provided, the current user's certificate(s) used to encrypt the
              file will be backed up. Otherwise, the user's current EFS
              certificate and keys will be backed up.
    /Y        Displays your current EFS certificate thumbprint on the local PC.
    /ADDUSER  Adds a user to the specified encrypted file(s). If CERTHASH is
              provided, cipher will search for a certificate with this SHA1
              hash. If CERTFILE is provided, cipher will extract the
              certificate from the file. If USER is provided, cipher will
              try to locate the user's certificate in Active Directory Domain
              Services.
    /FLUSHCACHE
              Clears the calling user's EFS key cache on the specified server.
              If servername is not provided, cipher clears the user's key cache
              on the local machine.
    /REKEY    Updates the specified encrypted file(s) to use the configured
              EFS current key.
    /REMOVEUSER
              Removes a user from the specified file(s). CERTHASH must be the
              SHA1 hash of the certificate to remove.

    directory A directory path.
    filename  A filename without extensions.
    pathname  Specifies a pattern, file or directory.
    efsfile   An encrypted file path.

    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.

Return Code: 1


C:\Windows\system32\cipher.exe
c:\>ver
Microsoft Windows [Version 10.0.19045.2075]
FileInfo
File Size49664bytes
Creation Time2019/12/07 18:08:32
LastWrite Time2019/12/07 18:08:32
ProductVersion10.0.19041.1
FileVersion10.0.19041.1 (WinBuild.160101.0800)
HashValue
MD5f3471ddb5ae8e057f1b908a50e4aad7c
SHA112b08c7a6a36d5624c2d7f40784c26a3607fa89b
SHA22483c8cf52d7e0b7e5a6d5adf075baa2ff4384b081e7f4fd516478ee7b
SHA256a6b2cfde3e3de872d9edd6a16710ed6c8ee32a0dfcf57322b27b3da8d18ae71a
SHA384eb632bf7ae1dac972f8085b154917e08ff45cfd819e0f715828a790c03f9a70e4630c3a2ef3b6c825fc591d4adce7f57
SHA5129bea40d52e4c36fdad0e4ff02d6534737a0729e3bee34da0aa2bd5b74c966be0868b638ae28cc8168127e59cc35368d508bf5ca379be1e5c49824f05dbc85df5
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