CONTENT USE CONTROL METHOD, CONTENT USE CONTROLLER, STORAGE MEDIUM FOR CONTENT USE CONTROL PROGRAM, AND STORAGE MEDIUM FOR CONTENT

PROBLEM TO BE SOLVED: To prevent replay attack by a method, where contents stored in a storage medium are backed up; when the number of their uses is limited and a means is provided for making the backup contents unusable, even if they are returned to the original storage medium, after the contents...

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Bibliographische Detailangaben
Hauptverfasser:	IORI SACHIKO, FUJII HARUHIKO, NAKAZATO KANA, MIYAKE NOBUHISA
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent replay attack by a method, where contents stored in a storage medium are backed up; when the number of their uses is limited and a means is provided for making the backup contents unusable, even if they are returned to the original storage medium, after the contents have been used. SOLUTION: The usable state of the contents reserved in the storage medium 30 are bound, by using information in a security area 32 provided in the storage medium 30. Each time the contents in the storage medium 30 are reproduced, the information in the security area 32 is rewritten to re-bind the usable state of the contents. Only when the information in the security area 32 has the value held when the bind is made, is the bound information enabled. If the information in the security area 32 is different from the value held when the bind is made, the bound information is disabled.