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1. WO2007146763 - SÉCURISATION DE CONTENU MULTIMÉDIA AU MOYEN D'UNE CLÉ DE CHIFFREMENT INTERCHANGEABLE

Numéro de publication WO/2007/146763
Date de publication 21.12.2007
N° de la demande internationale PCT/US2007/070680
Date du dépôt international 08.06.2007
CIB
G06F 21/00 2006.01
GPHYSIQUE
06CALCUL; COMPTAGE
FTRAITEMENT ÉLECTRIQUE DE DONNÉES NUMÉRIQUES
21Dispositions de sécurité pour protéger les calculateurs, leurs composants, les programmes ou les données contre une activité non autorisée
H04N 7/167 2011.01
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
NTRANSMISSION D'IMAGES, p.ex. TÉLÉVISION
7Systèmes de télévision
16Systèmes à secret analogiques; Systèmes à abonnement analogiques
167Systèmes rendant le signal de télévision inintelligible et ensuite intelligible
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
H04N 21/2541
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
254Management at additional data server, e.g. shopping server, rights management server
2541Rights Management
H04N 21/4331
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
433Content storage operation, e.g. storage operation in response to a pause request, caching operations
4331Caching operations, e.g. of an advertisement for later insertion during playback
H04N 21/4405
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
44Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
4405involving video stream decryption
H04N 21/4408
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
44Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
4408involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
H04N 21/4623
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
21Selective content distribution, e.g. interactive television or video on demand [VOD]
40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
45Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
462Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
4623Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
Déposants
  • SCIENTIFIC-ATLANTA, INC. [US/US]; 5030 Sugarloaf Parkway Lawrenceville, Georgia 30044, US (AllExceptUS)
  • PINDER, Howard G. [US/US]; US (UsOnly)
  • MAHOLSKI, Andrew D. [US/US]; US (UsOnly)
Inventeurs
  • PINDER, Howard G.; US
  • MAHOLSKI, Andrew D.; US
Mandataires
  • LAFFERTY, Wm. Brook ; Scientific-Atlanta, Inc. Intellectual Property Dept. 5030 Sugarloaf Parkway Lawrenceville, Georgia 30044, US
Données relatives à la priorité
11/454,42116.06.2006US
Langue de publication anglais (EN)
Langue de dépôt anglais (EN)
États désignés
Titre
(EN) SECURING MEDIA CONTENT USING INTERCHANGEABLE ENCRYPTION KEY
(FR) SÉCURISATION DE CONTENU MULTIMÉDIA AU MOYEN D'UNE CLÉ DE CHIFFREMENT INTERCHANGEABLE
Abrégé
(EN)
An embodiment of a system for securing media content includes a digital media device comprising a memory associated with a secure element. The memory contains a private key and storage for at least one group key. The private key is used to decrypt transmissions from a remote access control system that are encrypted by a corresponding public key. The digital media device further comprises logic configured to respond to a first message received from the remote access control system encrypted by the public key and including a first group key, the logic responding to the first message by decrypting the first group key and storing the first group key in the memory of the secure element. The digital media device further comprises logic configured to decrypt a content key with the first group key. The content key is used to encrypt media content stored on a medium accessible by the digital media device.
(FR)
Un mode de réalisation de l'invention concernant un système destiné à sécuriser un contenu multimédia comprend un dispositif multimédia numérique comportant une mémoire liée à un élément sécurisé. La mémoire contient une clé privée et un stockage pour au moins une clé de groupe. La clé privée est utilisée pour déchiffrer des transmissions provenant d'un système de contrôle d'accès à distance qui sont chiffrées par une clé publique correspondante. Le dispositif multimédia numérique comprend aussi une logique configurée pour répondre à un premier message reçu dudit système de contrôle d'accès, chiffré par la clé publique et comprenant une première clé de groupe, ladite logique répondant au premier message par déchiffrement de la première clé de groupe et par stockage de cette clé dans la mémoire de l'élément sécurisé. Le dispositif multimédia numérique comporte une logique configurée pour déchiffrer une clé de contenu avec la première clé de groupe. La clé de contenu est utilisée pour chiffrer le contenu multimédia stocké sur un support auquel peut accéder le dispositif multimédia numérique.
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