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1. WO2001055858 - DATA RECORDING/REPRODUCING DEVICE AND SAVED DATA PROCESSING METHOD, AND PROGRAM PROVIDING MEDIUM

Publication Number WO/2001/055858
Publication Date 02.08.2001
International Application No. PCT/JP2001/000525
International Filing Date 26.01.2001
IPC
G11B 20/00 2006.1
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
H04L 9/32 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
9Arrangements for secret or secure communication
32including means for verifying the identity or authority of a user of the system
CPC
G11B 20/00086
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
G11B 20/00152
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
00137involving measures which result in a restriction to contents recorded on or reproduced from a record carrier to authorised users
00152involving a password
G11B 20/0021
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
0021involving encryption or decryption of contents recorded on or reproduced from a record carrier
G11B 20/00217
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
0021involving encryption or decryption of contents recorded on or reproduced from a record carrier
00217the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
G11B 20/00536
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
20Signal processing not specific to the method of recording or reproducing; Circuits therefor
00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
0021involving encryption or decryption of contents recorded on or reproduced from a record carrier
00485characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier
00492wherein content or user data is encrypted
00536wherein encrypted content data is subjected to a further, iterated encryption, e.g. interwoven encryption
H04L 2209/60
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
2209Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
60Digital content management, e.g. content distribution
Applicants
  • SONY CORPORATION [JP]/[JP] (AllExceptUS)
  • SONY COMPUTER ENTERTAINMENT INC. [JP]/[JP] (AllExceptUS)
  • ASANO, Tomoyuki [JP]/[JP] (UsOnly)
  • ISHIBASHI, Yoshihito [JP]/[JP] (UsOnly)
  • SHIRAI, Taizo [JP]/[JP] (UsOnly)
  • AKISHITA, Toru [JP]/[JP] (UsOnly)
  • TANAKA, Makoto [JP]/[JP] (UsOnly)
Inventors
  • ASANO, Tomoyuki
  • ISHIBASHI, Yoshihito
  • SHIRAI, Taizo
  • AKISHITA, Toru
  • TANAKA, Makoto
Agents
  • TANABE, Shigemoto
Priority Data
2000-1646926.01.2000JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) DATA RECORDING/REPRODUCING DEVICE AND SAVED DATA PROCESSING METHOD, AND PROGRAM PROVIDING MEDIUM
(FR) DISPOSITIF DE LECTURE/REPRODUCTION DE DONNEES ET PROCEDE DE TRAITEMENT DE DONNEES SAUVEGARDEES, ET SUPPORT DE PROGRAMME
Abstract
(EN) A data recording/reproducing device enabling saved data to be ensured and a saved data processing method. Saved data is encrypted by creating an encryption key unique to a program, for example, a content key, or a saved data encrypting key according to a content key and the encrypted saved data is stored in a recording device. When the saved data is reproduced, the decoding is carried out by a saved data decoding key unique to the program. The saved data is encrypted and decoded by creating a key unique to the recording/reproducing device or a saved data encrypting key and decoding key using a user password to store and reproduce the saved data, and thus the saved data encrypting key is created according to various types of limit information.
(FR) L'invention concerne un dispositif de lecture/reproduction de données permettant de sauvegarder des données, et un procédé de traitement de données sauvegardées. Les données sauvegardées sont chiffrées au moyen d'une clé de chiffrement unique se référant à un programme, par exemple une clé de contenu, ou d'une clé de chiffrement de données sauvegardées produite en fonction d'une clé de contenu ; et les données sauvegardées chiffrées sont stockées dans un dispositif d'enregistrement. Quand les données sauvegardées sont reproduites, le décodage est mis en oeuvre par une clé de décodage de données sauvegardées unique se référant au programme. Les données sauvegardées sont chiffrées et décodées au moyen d'une clé unique se référant au dispositif d'enregistrement/reproduction, ou d'une clé de chiffrement de données sauvegardées et d'une clé de décodage utilisant un mot de passe d'utilisateur pour stocker et reproduire les données sauvegardées. De cette manière, la clé de chiffrement de données sauvegardées est produite en fonction de divers types d'informations de limitation.
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