APPARATUS AND METHOD AND FOR PROTECTED RECORDING AND PLAYBACK OF DIGITAL CONTENT

• Main Authors: SHUNJI HARADA, NAOHIKO NOGUCHI, MASAYA MIYAZAKI, SHINJI INOUE, SHINICHI MATSUI, NATSUME MATSUZAKI
• Format: Patent
• Language: English
• Published: 28.08.2009
• Subjects: 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; WIRELESS COMMUNICATIONS NETWORKS

DISCLOSED IS A SYSTEM (100) COMPOSED OF A MAIN DEVICE (300) AND A RECORDING MEDIUM DEVICE (400). THE MAIN DEVICE INCLUDES: A RECEPTION UNIT (361) THAT RECEIVES A DIGITAL WORK FROM AN EXTERNAL DISTRIBUTION SERVER; AN INTERNAL STORAGE AREA (303) FOR STORING THE DIGITAL WORK; A PLAYBACK UNIT (304) THAT PLAYS BACK THE DIGITAL WORK; A UNIQUE INFORMATION STORAGE AREA (310) FOR STORING INFORMATION THAT IS UNIQUE TO THE MAIN DEVICE; AND ENCRYPTION UNIT (320) THAT ENCRYPTS THE DIGITAL WORK USING THE UNIQUE INFORMATION; A DECRYPTION UNIT (340) THAT DECRYPTS, USING THE UNIQUE INFORMATION, THE ENCRYPTED DIGITAL WORK HAVING BEEN READ FROM THE RECORDING MEDIUM DEVICE; A WRITE UNIT (330) THAT WRITES THE ENCRYPTED DIGITAL WORK INTO THE RECORDING MEDIUM DEVICE WHICH IS PORTABLE; AND A READ UNIT (350) THAT READS THE ENCRYPTED DIGITAL WORK FROM THE RECORDING MEDIUM DEVICE.