WO2009057857A1 - Système et procédé pour fournir un service de diffusion à accès conditionnel - Google Patents

Système et procédé pour fournir un service de diffusion à accès conditionnel Download PDF

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Publication number
WO2009057857A1
WO2009057857A1 PCT/KR2008/000616 KR2008000616W WO2009057857A1 WO 2009057857 A1 WO2009057857 A1 WO 2009057857A1 KR 2008000616 W KR2008000616 W KR 2008000616W WO 2009057857 A1 WO2009057857 A1 WO 2009057857A1
Authority
WO
WIPO (PCT)
Prior art keywords
subscription
cas
broadcasting service
key
chip
Prior art date
Application number
PCT/KR2008/000616
Other languages
English (en)
Inventor
Kwang Young Kim
Jong Ho Kim
Do Wan Kim
Jae Bum Park
Byung Seok Hwang
Original Assignee
Sk Telecom Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020080005797A external-priority patent/KR100946911B1/ko
Application filed by Sk Telecom Co., Ltd. filed Critical Sk Telecom Co., Ltd.
Publication of WO2009057857A1 publication Critical patent/WO2009057857A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management 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
    • H04N21/266—Channel 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
    • H04N21/26606—Channel 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 for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management 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
    • H04N21/266—Channel 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
    • H04N21/26613—Channel 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 for generating or managing keys in general
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6131—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a mobile phone network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
    • H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
    • H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys

Definitions

  • the present invention relates, in general, to a system and method for providing a conditional- access broadcasting service, in which a broadcasting service subscription process is performed in advance when a Conditional Access System (CAS) chip is issued, so that a conditional-access broadcasting service can be received using a mobile terminal in which the corresponding CAS chip is installed, and, more particularly, to a system and method for providing a conditional-access broadcasting service, which determines whether access to the broadcasting service of a specific channel is possible by analyzing the subscription Entitlement Management Message (EMM) of an installed CAS chip when a request for access to the broadcasting service of the corresponding channel is made, and which makes a request for subscription to the broadcasting service of the corresponding channel in order to receive the corresponding broadcasting service if it is determined that access to the broadcasting service of the corresponding channel is not possible.
  • EMM Entitlement Management Message
  • the DMB service has changed the type of broadcast from a conventional analog type to a digital type, thereby providing high-quality Compact Disk (CD)-level sound quality, various data services, bidirectionality, and excellent mobile reception quality, expanding the concept of existing broadcasts from that of watching and listening to broadcasts to that of watching, listening to and participating in broadcasts, and enabling various types of multimedia information, such as news, traffic information, weather information, geographical information, and moving picture information, to be transmitted in the form of text and graphics, in addition to music broadcasts.
  • CD Compact Disk
  • the CAS performs a conditional-access function by setting viewing levels using a
  • DMB chip installed in each mobile terminal, and performs a security function of preventing the viewing of a DMB through the illegal use of the DMB chip.
  • a CAS chip which is inserted/installed into/in a terminal and is then operated, performs functions of generating a Control Word (CW), necessary to decrypt encrypted broadcasting content, based on an Entitlement Control Message (ECM), and extracting a subscription message and access rights information from an EMM.
  • CW Control Word
  • ECM Entitlement Control Message
  • a subscription procedure is required in order for the CAS chip to support the normal viewing of a specific program.
  • the subscription procedure is completed by receiving the subscription message.
  • FIG. 1 is a conceptual diagram showing a method by which a mobile terminal uses a broadcasting service after a conventional CAS chip has been issued.
  • a Personalization Secure Application Module (PerSAM) issuance company 100 issues an issuance PerSAM card, used when important information is issued to a CAS chip, generates a Called Subscriber Identification (CSID) list to be stored in each CAS chip, and then provides the CSID list, together with the issuance PerSAM card, to a CAS chip issuance company 110.
  • PerSAM Personalization Secure Application Module
  • the CAS chip issuance company 110 generates a CAS Initial Delivery (CID) key to be included in the CAS chip using a seed key and an algorithm stored in the issuance PerSAM card, received from the PerSAM issuance company 100, and then inputs the generated CID key to the CAS chip.
  • CID CAS Initial Delivery
  • the client management server 140 transmits the CSID information of the
  • CAS chip installed in the mobile terminal 150, to a CAS server 120.
  • the client management server 140 transmits the broadcasting service subscription request message to the CAS server 120.
  • an object of the present invention is to provide a system and method for providing a conditional- access broadcasting service in which a broadcasting service subscription process is performed in advance when a CAS chip is issued, so that bandwidth consumed by subscription messages is reduced, thereby increasing the number of subscribers.
  • Another object of the present invention is to provide a system and method for providing a conditional-access broadcasting service which can receive a conditional- access broadcasting service, even though an additional subscription procedure has not been performed after a mobile terminal has been purchased.
  • a further object of the present invention is to provide a system and method for providing a conditional-access broadcasting service which includes product rights in formation together with a subscription message when a CAS chip is issued, so that a corresponding program can be immediately viewed without performing a purchase procedure for the product.
  • the present invention provides a method of generating a pre-subscription Conditional Access System (CAS) chip, for which a broadcasting service subscription process has been performed in advance, in order for a mobile terminal to receive a conditional- access broadcasting service, the method including: a step of generating a CAS Initial Delivery (CID) key using a seed key and an algorithm, stored in an issuance Personalization Secure Application Module (PerSAM) card, and registering the generated CID key in the CAS chip; and a step of generating a subscriber key using a seed key and an algorithm, stored in a subscription PerSAM card, inserting the generated subscriber key into a subscription Entitlement Management Message (EMM), and generating a pre-subscription CAS chip by registering the subscription EMM in the CAS chip in which the CID key is registered.
  • CID CAS Initial Delivery
  • PerSAM Personalization Secure Application Module
  • the present invention provides a method of at least one mobile terminal receiving a broadcasting service through a client management server for storing subscriber information, and a CAS server, the method including a step (a) of, when a request for access to the broadcasting service of a specific channel has been made, determining whether the access to the broadcasting service of the corresponding channel is possible by analyzing the subscription EMM of an installed CAS chip; a step (b) of, if, as the result of the determination at the step (a), it is determined that the access to the broadcasting service of the corresponding channel is not possible, displaying a message inquiring about whether a request for viewing rights has been made to access the broadcasting service of the corresponding channel; a step (c) of, if a request command is selected using the displayed message inquiring about whether the request for viewing rights has been made, transmitting a viewing rights request message to the CAS server through the client management server; and a step (d) of, if a viewing rights
  • the CAS server affiliates the mobile terminal with the broadcast service of the corresponding channel, and then transmits a viewing rights investment message to the mobile terminal.
  • the present invention provides a system for providing a conditional-access broadcasting service, including one or more mobile terminals, each configured to include a CAS chip, in which a CID key and a subscription EMM are registered, determine whether access to the broadcasting service of a specific channel is possible using the subscription EMM if the corresponding channel is selected for the access to the broadcasting service, and display a message inquiring about whether a request for viewing rights has been made if it is determined that the access to the broadcasting service of the corresponding channel is not possible; a client management server configured to manage subscriber information, including a CSID list, in which a broadcasting service subscription process has been performed in advance when a CAS chip is issued, and transmit a viewing rights request message when the viewing rights request message is received from one of the mobile terminals; and a CAS server configured to, when the viewing rights request message is received from the client management server, perform subscription to the broadcast service of a channel included in the viewing rights request message, and then transmit
  • the present invention provides a mobile terminal including a wireless transmission/reception unit, an input unit, a display unit, and an audio unit, and receiving a conditional-access broadcasting service, the mobile terminal including a CAS chip including a subscription EMM configured to include a subscriber key, and a CID key; a channel viewing qualification determination unit configured to, when a broadcasting service access request command is received through the input unit, determine whether access to the broadcasting service of a specific channel is possible using the subscription EMM included in the CAS chip, and if, as the result of the determination, it is determined that the access to the broadcasting service of the corresponding channel is not possible, display a message inquiring about whether a request for viewing rights has been made for the corresponding channel on the display unit; and a viewing rights request unit configured to, if the request command is input through the displayed message inquiring about whether the request for viewing rights has been made, generate and transmit a viewing rights request message including the identification information of the mobile terminal and information about the
  • the channel viewing qualification determination unit determines whether the access to the broadcasting service of the corresponding channel is possible by checking information about channel viewing qualification and about a charged channel viewing level included in the subscription EMM of the CAS chip.
  • the PerSAM card issuance device 200 generates the CSID list to be stored in the CAS chip, and then transmits the CSID list to the CAS chip issuance device 210 and the CAS server 220.
  • the CAS server 220 invests the viewing rights such that the mobile terminal 260 can receive a broadcast for the corresponding channel, and then transmits a viewing rights investment message to the mobile terminal 260.
  • the PerSAM card issuance device issues an issuance PerSAM card and a subscription PerSAM card, used for pre-subscription to a broadcasting service.
  • the CAS chip issuance device generates a CID key using a seed key and an algorithm, stored in the issuance PerSAM card, issued by the PerSAM card issuance device, at step S308, completes the issuance of the CAS chip by registering the generated CID key in the CAS chip at step S310, and then provides the issuance- completed CAS chip to the CAS chip subscription device at step S312.
  • the CAS chip 350 of the mobile terminal includes a unique CID key.
  • the CID key is issued to the CAS chip 350 through the issuance PerSAM card, and a seed key and an algorithm, used to generate the CID key, are included in the issuance PerSAM card.
  • the CID key is a key used for encryption/decryption when a broadcasting service provider transmits a subscription EMM, including a subscriber key, to a mobile terminal.
  • the viewing rights request unit 370 When the request command is selected through the input unit 310, the viewing rights request unit 370 generates a viewing rights request message including the identification information of the mobile terminal and about the corresponding channel, and then transmits the viewing rights request message to the client management server and the CAS server through the wireless transmission/reception unit 300.
  • the CAS server invests viewing rights for a channel included in the viewing rights request message, generates a viewing rights investment message, and then transmits the viewing rights investment message to the mobile terminal.
  • FIG. 5 is a flow chart showing a method of providing a broadcasting service using the mobile terminal in which a subscription-completed CAS chip is installed according to the present invention.
  • the mobile terminal receives the broadcast service of the corresponding channel at step S412.
  • a system and method for providing a conditional-access broadcasting service uses a mobile terminal in which a pre-subscription CAS chip, in which a broadcasting service subscription process is performed in advance when the CAS chip is issued, is installed, so that it is suitable for receiving a conditional-access broadcasting service without performing an additional subscription procedure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé pour la génération d'une puce de système d'accès conditionnel (CAS) de pré-abonnement. Afin qu'un terminal mobile puisse recevoir un service de diffusion à accès conditionnel, un procédé d'abonnement à un service de diffusion est préalablement mis en oeuvre sur la puce CAS. Une clé de distribution initiale CAS (CID) est générée au moyen d'une clé de diversification et d'un algorithme, stockés dans une carte de module d'application protégée et de personnalisation d'émission (PerSAM), et la clé CID générée est enregistrée dans la puce CAS. Une clé d'abonné est générée au moyen d'une clé de diversification et d'un algorithme, stockés dans une carte PerSAM d'abonnement. La clé d'abonné générée est insérée dans un message de gestion d'autorisation (EMM) d'abonnement. Une puce CAS de pré-abonnement est générée par enregistrement de l'EMM d'abonnement dans la puce CAS dans laquelle la clé CID est enregistrée.
PCT/KR2008/000616 2007-10-31 2008-02-01 Système et procédé pour fournir un service de diffusion à accès conditionnel WO2009057857A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2007-0110093 2007-10-31
KR20070110093 2007-10-31
KR1020080005797A KR100946911B1 (ko) 2007-10-31 2008-01-18 수신 제한된 방송 서비스 제공 시스템 및 방법
KR10-2008-0005797 2008-01-18

Publications (1)

Publication Number Publication Date
WO2009057857A1 true WO2009057857A1 (fr) 2009-05-07

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Application Number Title Priority Date Filing Date
PCT/KR2008/000616 WO2009057857A1 (fr) 2007-10-31 2008-02-01 Système et procédé pour fournir un service de diffusion à accès conditionnel

Country Status (1)

Country Link
WO (1) WO2009057857A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3465953A4 (fr) * 2016-08-11 2019-05-01 Samsung Electronics Co., Ltd. Procédé et appareil destinés à installer des informations cas
US11457006B1 (en) * 2018-02-02 2022-09-27 Cox Communications, Inc. Secure management of security keys to control access to a protected communication network

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457739A (en) * 1992-06-19 1995-10-10 France Telecom Method and system of interactive access to radio broadcast information elements
US6510515B1 (en) * 1998-06-15 2003-01-21 Telefonaktlebolaget Lm Ericsson Broadcast service access control
KR20040056481A (ko) * 2002-12-23 2004-07-01 한국전자통신연구원 디지털 케이블 방송 시스템의 제한 수신 장치, 이를이용한 수신 시스템 및 수신 방법
KR20060041563A (ko) * 2004-11-09 2006-05-12 온타임텍 주식회사 수신제한시스템에서의 수신제한정보 갱신방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457739A (en) * 1992-06-19 1995-10-10 France Telecom Method and system of interactive access to radio broadcast information elements
US6510515B1 (en) * 1998-06-15 2003-01-21 Telefonaktlebolaget Lm Ericsson Broadcast service access control
KR20040056481A (ko) * 2002-12-23 2004-07-01 한국전자통신연구원 디지털 케이블 방송 시스템의 제한 수신 장치, 이를이용한 수신 시스템 및 수신 방법
KR20060041563A (ko) * 2004-11-09 2006-05-12 온타임텍 주식회사 수신제한시스템에서의 수신제한정보 갱신방법

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3465953A4 (fr) * 2016-08-11 2019-05-01 Samsung Electronics Co., Ltd. Procédé et appareil destinés à installer des informations cas
US10462501B2 (en) 2016-08-11 2019-10-29 Samsung Electronics Co., Ltd. Method and apparatus for installing conditional access system information
US11019375B2 (en) 2016-08-11 2021-05-25 Samsung Electronics Co., Ltd. Method and apparatus for installing conditional access system information
US11457006B1 (en) * 2018-02-02 2022-09-27 Cox Communications, Inc. Secure management of security keys to control access to a protected communication network

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