/AUTHENTICATE

   Associates a DES(default) or AES algorithm Message Authenticate
   Code (MAC) value with one or more files and checks for any
   modification of either plain text or cipher text files. Use the
   additional /UPDATE qualifier to store each file's MAC in the
   databases. Use only the /AUTHENTICATE qualifier to subsequently
   test the integrity of the file's data and security attributes.
   You must create a DES or AES key prior to updating or checking an
   existing MAC. When using the AES algorithm, you must specify the
   /AES qualifier. You can use AES algorithm only with respective AES
   key and the DES algorithm only with DES key. For more information
   about creating DES or AES key and the minimum key length required
   for different algorithms, see ENCRYPT /CREATE_KEY help.

   Format for the ENCRYPT /AUTHENTICATE Command

     ENCRYPT /AUTHENTICATE  file-spec key-name [qualifiers]

Additional information available:

Parameters      Qualifiers
/AES            /BACKUP         /BEFORE         /BY_OWNER       /CONFIRM
/DATABASE       /EXCLUDE        /EXPIRED        /LOG            /MODIFIED
/MULTIPLE_FILES /OUTPUT         /SECURITY       /SINCE          /UPDATE
Example