METHOD AND DEVICE FOR COPYRIGHT PROTECTION, AND RECORDING MEDIUM WHERE COPYRIGHT PROTECTING PROGRAM IS RECORDED

摘要

PROBLEM TO BE SOLVED: To obtain a method and device for copyright protection which can properly protect the secondary copyright of a secondary author of the original author. SOLUTION: A secondary copyright flag 71 is set for the source production whose secondary copyright is protected and a link destination specifier specifying the source production and the electronic signature of the source production are recorded in a secondary production using the source production secondarily; when the secondary production is used, the source production specified the link destination specifier is read out and when the secondary copyright flag 71 is set to the source production, it is checked whether or not the electronic signature of the source production is correct. When the electronic signature is correct, the data 73 of the source production are read out and inserted into the data 73 of the secondary production.