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1. WO2005008371 - MISE EN OEUVRE DE DECOMPTE DE LECTURE DANS UN MATERIEL SECURISE POUR LA PRESENTATION DE PRODUCTIONS NUMERIQUES

Numéro de publication WO/2005/008371
Date de publication 27.01.2005
N° de la demande internationale PCT/US2004/021349
Date du dépôt international 02.07.2004
CIB
H04L 9/00 2006.01
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
LTRANSMISSION D'INFORMATION NUMÉRIQUE, p.ex. COMMUNICATION TÉLÉGRAPHIQUE
9Dispositions pour les communications secrètes ou protégées
CPC
G06F 21/10
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
10Protecting distributed programs or content, e.g. vending or licensing of copyrighted material
G06F 2221/2135
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
2221Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
21Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
2135Metering
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 20/00753
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
00731involving a digital rights management system for enforcing a usage restriction
00746wherein the usage restriction can be expressed as a specific number
00753wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
G11B 20/0084
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
00731involving a digital rights management system for enforcing a usage restriction
0084wherein the usage restriction can be expressed as a specific time or date
G11B 20/00869
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
00855involving a step of exchanging information with a remote server
00869wherein the remote server can deliver the content to a receiving device
Déposants
  • GENERAL INSTRUMENT CORPORATION [US/US]; 101 Tournament Drive Horsham, Pennsylvania 19044, US (AllExceptUS)
  • MEDVINSKY, Alexander, [US/US]; US (UsOnly)
  • SPRUNK, Eric, J. [US/US]; US (UsOnly)
Inventeurs
  • MEDVINSKY, Alexander,; US
  • SPRUNK, Eric, J.; US
Mandataires
  • ROCKETT, Esteban, A.; General Instrument Corporation Patent Law Department 101 Tournament Drive MD: PA06/1-3032 Horsham, Pennsylvania 19044, US
Données relatives à la priorité
10/613,86805.07.2003US
Langue de publication anglais (EN)
Langue de dépôt anglais (EN)
États désignés
Titre
(EN) ENFORCEMENT OF PLAYBACK COUNT IN SECURE HARDWARE FOR PRESENTATION OF DIGITAL PRODUCTIONS
(FR) MISE EN OEUVRE DE DECOMPTE DE LECTURE DANS UN MATERIEL SECURISE POUR LA PRESENTATION DE PRODUCTIONS NUMERIQUES
Abrégé
(EN)
A system for restricting playback of an electronic presentation, such as a digital video or song. The system uses a playback time limit that specifies a duration of allowable playback time. The playback time limit is typically longer than the running time of the presentation so that a user is able to use standard transport controls such as pause, stop, rewind, fast forward, etc., that affect the overall playback time needed to view the presentation in its entirety. One approach uses a secure time base that is provided by a server over a network to a client device that includes a playback device. The secure time base is received and used by secure processing within the playback device. This approach allows rendering of the presentation to an output device to be performed by non-secure processing without unduly compromising the security of the system.
(FR)
L'invention concerne un système de restriction de lecture de présentation électronique, du type vidéo ou chanson numérique. Le système utilise une limite de temps de lecture qui spécifie une durée de lecture autorisée, et généralement la limite excède la durée de la présentation si bien que l'on peut faire appel à des commandes de transport classiques du type pause, arrêt, retour arrière, avance rapide, etc. affectant la durée de lecture globale requise pour la lecture totale de la présentation. Selon une approche, on utilise une base de temps sécurisée fournir par un serveur sur un réseau à un dispositif client qui comporte un dispositif de lecture. Ladite base est reçue et utilisée par traitement sécurisée dans le dispositif de lecture. Cela assure un rendu de la présentation à un dispositif de sortie par traitement non sécurisé sans compromettre exagérément la sécurité du système.
Également publié en tant que
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