DATA OPERATION METHOD, RECORDING MEDIUM FOR RECORDING PROGRAM OF IMAGE GENERATING METHOD, TRANSMISSION MEDIUM FOR TRANSMITTING THE PROGRAM OF THE IMAGE GENERATING METHOD, RECORDING MEDIUM FOR RECORDING PROGRAM OF IMAGE DECODING METHOD AND TRANSMISSION MEDIUM FOR TRANSMITTING THE PROGRAM OF THE IMAGE DECODING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a data operation method that facilitates the utilization by legal users without losing the author's copyright and the copyright of digital contents. SOLUTION: Part of digital contents 11 is copied to generate a partial data part 43, which is encrypted by using a contents key 45, the contents key 45 and image composite information 42 are encrypted by an encryption key 47 to generate permission information 48, contents information 41 is visibly embedded to the digital contents 11, a data part 50 with the permission information to which the permission information 48 is embedded as invisible information and an encrypted partial data part 46 are composited to generate composite data 60, which are distributed.