signature: signature [control] [file]
  NEC authentication-ization of a MMM script file

  parameter
   control:
     ON         scramble to NEC-data
     OFF        unscramble NEC-data
     LIST       show list of scrambled NEC-data
     VIEW       show contents of scrambled NEC-data

   file:        file name

  end status
   Success:
   Failed:      Type miss