СИСТЕМА ПРЕДОТВРАЩЕНИЯ НЕСАНКЦИОНИРОВАННОГО ИСПОЛЬЗОВАНИЯ ЦИФРОВОГО СОДЕРЖАНИЯ

摘要

An object of the present invention is to provide a system for preventing unauthorized use of digital content which can prevent unauthorized use of digital content and can reliably collect a charge for secondary use. Basically, a system for preventing unauthorized use of digital content has: a distributing recording medium ± on which a content file having header information "A" and a data body "B" is recorded in a state of lacking play information "A1" indispensable for playing the data body "B" included in the header information a; a management center 110 which is management means managing use of the content file on the distributing recording medium ± and can deliver the prepared play information "A1" of the header information "A" as piece data via a communication line ²; and a digital content playing device 120 which is a device used for playing the content file on the distributing recording mediuma and has a function of communicating via the communication line ² with the management center 110.