Conclusions


          Based on our results, digital watermarking on CD's would
     best be done in the time domain.  In order to prevent the
     detection of the watermark by a user, a hashing algorithm and 
     even possibly some kind of encoding could be used.  When
     manufacturers produce CD writers, they could include the decoder
     for the encoding method to determine whether or not it can make
     copies of the disk.   Once the encoding algoritm is recognized by
     the burner it could return a message to the user stating that the 
     disk is unburnable due to copyright law.

          Since the digital watermark would still be in place if the
     user recorded the CD to their hard drive they still could not
     burn the music to a CD.  In order for this to work completely,
     there must also be an agreement with the makers of "CD-ripping"
     software to block encoding the data into MP3 format.  Either this
     or it would be necessary to include a watermark that gets taken
     into account in the encoding so that it is not lost in the
     process.