KR970068618A - In a conditional access system of digital DBS, - Google Patents

In a conditional access system of digital DBS, Download PDF

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Publication number
KR970068618A
KR970068618A KR1019960008708A KR19960008708A KR970068618A KR 970068618 A KR970068618 A KR 970068618A KR 1019960008708 A KR1019960008708 A KR 1019960008708A KR 19960008708 A KR19960008708 A KR 19960008708A KR 970068618 A KR970068618 A KR 970068618A
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KR
South Korea
Prior art keywords
unit
control message
qualification
control word
control
Prior art date
Application number
KR1019960008708A
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Korean (ko)
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KR0183342B1 (en
Inventor
최병조
Original Assignee
정장호
엘지정보통신 주식회사
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.)
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Application filed by 정장호, 엘지정보통신 주식회사 filed Critical 정장호
Priority to KR1019960008708A priority Critical patent/KR0183342B1/en
Publication of KR970068618A publication Critical patent/KR970068618A/en
Application granted granted Critical
Publication of KR0183342B1 publication Critical patent/KR0183342B1/en

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Classifications

    • 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
    • H04N21/45—Management 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
    • H04N21/462—Content 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
    • H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
    • 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
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4343—Extraction or processing of packetized elementary streams [PES]
    • 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
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4367—Establishing a secure communication between the client and a peripheral device or smart card
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/14—Aspects of broadcast communication characterised by the type of broadcast system direct broadcast satellite [DBS]

Abstract

본 발명은 디지탈 DBS(Direct Broadcasting Satellite ;직접위성방송)에 관한 것으로, 특히 디지탈 DBS송신국에서 자격통제메세지(Entitlement Control Message)의 전송하는 시간을 조정하여 불법 수신기에 의한 제어단어(Control Word)의 분배를 막아 전파 해킹을 방지하도록 한 디지탈 DBS의 제한 수신 시스템에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital DBS (Direct Broadcasting Satellite), and more particularly, to a digital DBS transmitting station that adjusts the transmission time of an Entitlement Control Message, The present invention relates to a digital DBS limited receiving system for preventing distribution hacking by preventing distribution.

종래 디지탈 DBS의 제한 수신 시스템은 전송 지연만큼 제어단어보다 자격통제메세지가 먼저 도착해야 한다는 점에 있어서 간단한 수신기의 개조와 초고속망을 이용하여 전파의 해킹이 가능한 문제점이 있었다.In the conventional digital DBS limited receiving system, a qualification control message must arrive before the control word as much as the transmission delay, and there has been a problem in that it is possible to hack the radio wave using a simple receiver modification and a high-speed network.

본 발명에 따른 디지탈 DBS의 제한수신 시스템에서 수신 장치에 의해 시간지연테스트부가 측정한 자격통제 메세지 처리 지연시간을 이용하여 임의의 제어단어를 적용시키기 전에 해당 제어단어를 암호화한 자격통제메세지가 수신기에 먼저 도착하는 시간을 조정함으로써 불법 수신기의 제어단어 분배에 의한 전파 해킹하는 것을 방지할 수 있다.In the conditional access system of the digital DBS according to the present invention, a qualification control message in which the control word is encrypted is applied to the receiver before the arbitrary control word is applied using the delay time of the entitlement control message measured by the time delay test unit It is possible to prevent propagation hacking by the control word distribution of the illegal receiver by adjusting the arrival time first.

Description

디지탈 DBS의 제한수신 시스템에서 수신장치In a conditional access system of digital DBS,

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제 2도는 본 발명에 따른 디지탈 DBS의 제한수신 시스템에서 수신 장치를 나타낸 구성 블록도이고, 제 2(나)도는 제 2(가)도에 있어서 제어단어와 자격통제메세지의 적용 시간을 나타낸 도면이다.FIG. 2 is a block diagram showing a reception apparatus in a digital DBS restriction receiving system according to the present invention, and FIG. 2 (b) is a diagram showing application time of a control word and a qualification control message in a second (a) .

Claims (1)

송신국으로부터 수신되는 스크램블링된 비디오/오디오/데이타 신호와 암호화된 자격관리메세지와 자격통제메세지를 인증하고 해당 가입자의 수신 자격을 점검하는 FFC디코더부와, 상기 암호화된 자격 관리메세지 내의 키를 복호화하고 해당 키를 이용하여 상기 암호화된 자격통제메세지로부터 제어단어를 추출하는 가입자스마트카드부와, 상기 송신국으로부터 인가되는 스크램블링된 비디오/오디오/데이타 신호를 상기 가입자스마트카드부로부터 받은 제어단어를 이용하여 원래 신호로 복호화하는 디지탈디스크램블모듈부를 포함하는 디지탈 DBS의 제한수신 시스템에서 수신장치에 있어서, 상기 FEC디코더부로부터 인가되는 자격통제메세지에 대한 테스트 패킷을 생성하여 인가하고, 자격통제메세지 처리 종료신호를 인가받아 상기 송신국에서 상기 제어단어보다 해당 자격통제메세지가 먼저 도착하도록 하는 시간을 조정하기 위한 자격통제메세지 처리 지연시간을 측정하는 시간지연테스트부와; 상기 FEC디코더로부터 인가되는 데이타와 상기 시간지연테스트부로부터 인가되는 테스트 패킷을 인터페이스하는 인터페이스논리부와; 상기 인터페이스논리부로부터 인가되는 자격통제메세지를 필터링하여 상기 메모리부에 잠시 저장시키고, 상기 디지탈디스크램블모듈부로부터 인가되는 원래 신호를 페이티브이에 출력하는 디멀티플렉서부와; 상기 디멀티플렉서부가 필터링하였음을 감지하여 상기 메모리부에 잠시 저장된 필터링된 자격통제메세지를 읽어내어 상기 가입자스마트 카드부에 인가하고, 상기 가입자스마트카드부로부터 제어단어를 인가받아 상기 디지탈디스크램블모듈부에 인가함과 동시에 상기 자격통제 메세지 처리 종료신호를 생성하여 상기 시간지연테스트부에 인가하는 제어처리부를 포함하는 것을 특징으로 하는 디지탈 DBS의 제한수신 시스템에서 수신 장치.An FFC decoder unit for authenticating the scrambled video / audio / data signal received from the transmitting station, the encrypted credential management message and the qualification control message, and checking the reception qualification of the corresponding subscriber, a key in the encrypted credential management message A subscriber smart card unit for extracting a control word from the encrypted entitlement control message using the key, and a scrambled video / audio / data signal applied from the transmitting station using a control word received from the subscriber smart card unit And a digital descrambler module for decrypting the received digital broadcasting signal into an original signal, the receiving apparatus comprising: a generation unit for generating and issuing a test packet for a qualification control message received from the FEC decoder unit, To the transmitting station, A time delay testing section for measuring a delay time of the entitlement control message for adjusting the time for the entitlement control message to arrive earlier than the control word; An interface logic unit for interfacing data applied from the FEC decoder and a test packet applied from the time delay testing unit; A demultiplexer unit for filtering the qualification control message applied from the interface logic unit and temporarily storing the filtered qualification control message in the memory unit and outputting the original signal applied from the digital descramble module unit on a pay-per-view basis; And a control unit for receiving a control word from the subscriber smart card unit and outputting the control word to the digital descrambler module. The digital descrambler module receives the control word from the subscriber smart card unit, And a control processor for generating the qualification control message processing end signal and applying the generated signal to the time delay testing unit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960008708A 1996-03-28 1996-03-28 Receiving apparatus in a limited reception system of a digital dbs KR0183342B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960008708A KR0183342B1 (en) 1996-03-28 1996-03-28 Receiving apparatus in a limited reception system of a digital dbs

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Application Number Priority Date Filing Date Title
KR1019960008708A KR0183342B1 (en) 1996-03-28 1996-03-28 Receiving apparatus in a limited reception system of a digital dbs

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KR970068618A true KR970068618A (en) 1997-10-13
KR0183342B1 KR0183342B1 (en) 1999-05-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020092745A (en) * 2001-06-05 2002-12-12 삼성전기주식회사 System and method for setting signal paths for discramble in digital satellite receiver
KR100917720B1 (en) * 2000-08-04 2009-09-15 톰슨 라이센싱 Method for secure distribution of digital data representing a multimedia content

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1447976B1 (en) * 2003-02-12 2019-06-19 Irdeto B.V. Method of controlling descrambling of a plurality of program transport streams, receiver system and portable secure device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100917720B1 (en) * 2000-08-04 2009-09-15 톰슨 라이센싱 Method for secure distribution of digital data representing a multimedia content
US8724808B2 (en) 2000-08-04 2014-05-13 Thomson Licensing S.A. Method for secure distribution of digital data representing a multimedia content
KR20020092745A (en) * 2001-06-05 2002-12-12 삼성전기주식회사 System and method for setting signal paths for discramble in digital satellite receiver

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