Content protection method, and information recording and reproduction apparatus using the same

In content protection method and apparatus, a title key invalidation information is generated for invalidating a title key corresponding to a content in a medium and a content key is generated from the title key and the title key invalidation information. The content is encrypted based on the conten...

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Bibliographische Detailangaben
1. Verfasser:	NAKAMURA YOSHIMITSU,TOMINAGA KIYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING 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 TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	In content protection method and apparatus, a title key invalidation information is generated for invalidating a title key corresponding to a content in a medium and a content key is generated from the title key and the title key invalidation information. The content is encrypted based on the content key. The title key invalidation information is changed in case of removing or moving the content from the medium and the changed title key invalidation information is stored in the medium. Therefore, the content is prevented from being replicated while enabling the content to be reproduced in another medium.