/SHOW=keyword-list
    Controls whether or not the following information about the
    encryption operation is displayed on SYS$COMMAND:
    Keyword        Meaning
    FILES          Displays input and output file names on
                   SYS$COMMAND
    STATISTICS     Displays the encryption stream statistics:
                   o  Bytes processed
                   o  Internal records processed
                   o  CPU time consumed within the encryption
                      algorithm