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1. WO2007090812 - PREPAID ACCESS CONTROL METHOD

Publication Number WO/2007/090812
Publication Date 16.08.2007
International Application No. PCT/EP2007/051074
International Filing Date 05.02.2007
IPC
G07F 7/08 2006.01
GPHYSICS
07CHECKING-DEVICES
FCOIN-FREED OR LIKE APPARATUS
7Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
08by coded identity card or credit card
H04N 5/00 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
H04N 7/167 2011.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
16Analogue secrecy systems; Analogue subscription systems
167Systems rendering the television signal unintelligible and subsequently intelligible
CPC
H04N 21/2543
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
2543Billing ; , e.g. for subscription services
H04N 21/26606
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
266Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
26606for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
H04N 21/4181
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
41Structure of client; Structure of client peripherals
418External card to be used in combination with the client device, e.g. for conditional access
4181for conditional access
H04N 21/4185
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
41Structure of client; Structure of client peripherals
418External card to be used in combination with the client device, e.g. for conditional access
4185for payment
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]
H04N 7/167
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
16Analogue secrecy systems; Analogue subscription systems
167Systems rendering the television signal unintelligible and subsequently intelligible
Applicants
  • NAGRACARD S.A. [CH]/[CH] (AllExceptUS)
  • KUDELSKI, André [CH]/[CH] (UsOnly)
Inventors
  • KUDELSKI, André
Agents
  • LEMAN CONSULTING S.A.
Priority Data
06101564.010.02.2006EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PREPAID ACCESS CONTROL METHOD
(FR) procédé de commande d'accès prépayée
Abstract
(EN)
The present invention aims at minimising the impact of an attack on the reloading of the credit into a security module connected to a Pay-TV decoder. The solution to this problem resides in a prepaid access control method to television products broadcasted in a data stream to a Pay-TV decoder linked to a security module having a credit, this method comprising the following steps: - receiving of a security message (ECM) comprising a temporary key (CW) allowing the decryption of at least a part of the data stream, - verifying access to said data on the basis of the rights contained in the security module, if the verification is positive, verifying of a counter a temporary keys sent to the decoder and determining if a limit has been reached, - transmitting the temporary key if the limit is not reached and updating the temporary key counter.
(FR)
La présente invention vise à minimiser les risques de piratage sur le rechargement du crédit dans un module de sécurité connecté à un décodeur de télévision payante. La solution à ce problème réside dans un procédé de commande d'accès prépayée à des produits de télévision diffusés dans un flux de données vers un décodeur de télévision payante lié à un module de sécurité ayant un crédit, ce procédé comprenant les étapes suivantes : - réception d'un message de sécurité (ECM) comprenant une clé temporaire (CW) permettant le décryptage d'au moins une partie du flux de données, - vérification de l'accès auxdites données sur la base des droits contenus dans le module de sécurité, si la vérification est positive, vérification d'un compteur de clés temporaires envoyées au décodeur et détermination si une limite a été atteinte, - transmission de la clé temporaire si la limite n'est pas atteinte et mise à jour du compteur de clés temporaires.
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