Why doesn Giovanni simply encode an identification serial number?
The use of single serial number would seem to have the advantage that it keeps the size of the watermark small. While other proposed schemes do seek to encode only an author’s serial number into the content, we see pitfalls in using this model alone. Either the author must maintain their own database, which associates meaningful records with that serial number, or they must entrust management of that database to someone else. In either case, lose the database, and lose your authorship claim. If every author maintained their own database of serial numbers and records, there would be no objectivity in the reading of a watermark. Disputes would have to be settled and entirely reliant on the author for the interpretation of “some number” which they claim to have extracted from a copy of a picture, song or video. Another reason behind a number of these proposals is also the simple fact that there is very little space for watermark information versus Giovanni. The more actively involved the
