MX349246B - Metodo para proteger claves de desencriptacion en un decodificador y decodificador para implementar dicho metodo. - Google Patents

Metodo para proteger claves de desencriptacion en un decodificador y decodificador para implementar dicho metodo.

Info

Publication number
MX349246B
MX349246B MX2016000585A MX2016000585A MX349246B MX 349246 B MX349246 B MX 349246B MX 2016000585 A MX2016000585 A MX 2016000585A MX 2016000585 A MX2016000585 A MX 2016000585A MX 349246 B MX349246 B MX 349246B
Authority
MX
Mexico
Prior art keywords
decoder
control word
unscrambling
referenced
pairing key
Prior art date
Application number
MX2016000585A
Other languages
English (en)
Other versions
MX2016000585A (es
Inventor
Macchetti Marco
Perrine Jerome
Servet Patrick
Hunacek Didier
Original Assignee
Nagravision Sa
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
Application filed by Nagravision Sa filed Critical Nagravision Sa
Publication of MX2016000585A publication Critical patent/MX2016000585A/es
Publication of MX349246B publication Critical patent/MX349246B/es

Links

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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
    • H04N21/43853—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex stream decryption
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4408—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network

Landscapes

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

Abstract

Un método para asegurar palabras de control (CW) dentro de un decodificador (10) a cargo de descifrar el contenido digital protegido por estas palabras de control, que comprende las siguientes etapas: - para cada unidad de descifrado (14) de este decodificador, cargar en un directorio (22) una clave de paridad (PK) referenciada por medio de un identificador (ID) que asocia dicha clave a una unidad de descifrado, - recibir al menos una palabra de control encriptada referenciada por medio de una indicación (D) que permite identificar la unidad de descifrado para la cual está destinada, - desencriptar la palabra de control utilizando una primera clave compartida con un módulo de seguridad (30), - identificar en el directorio la clave de paridad cuyo identificador (ID) corresponde a la indicación de destino (D) asociada con la palabra de control, - encriptar esta palabra de control utilizando esta clave de paridad, - almacenar en un registro (15) la palabra de control de manera cronológica y referenciada.
MX2016000585A 2013-07-19 2014-07-04 Metodo para proteger claves de desencriptacion en un decodificador y decodificador para implementar dicho metodo. MX349246B (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13177287.3A EP2827601A1 (fr) 2013-07-19 2013-07-19 Méthode et dispositif pour la protection des clés de déchiffrement d'un décodeur
PCT/EP2014/064332 WO2015007549A1 (fr) 2013-07-19 2014-07-04 Methode pour la protection de cles de dechiffrement dans un decodeur et decodeur pour la mise en oeuvre de cette methode

Publications (2)

Publication Number Publication Date
MX2016000585A MX2016000585A (es) 2016-03-16
MX349246B true MX349246B (es) 2017-07-19

Family

ID=48795509

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2016000585A MX349246B (es) 2013-07-19 2014-07-04 Metodo para proteger claves de desencriptacion en un decodificador y decodificador para implementar dicho metodo.

Country Status (12)

Country Link
US (1) US10075770B2 (es)
EP (2) EP2827601A1 (es)
JP (1) JP6305531B2 (es)
KR (1) KR102281972B1 (es)
CN (1) CN105900441B (es)
AU (1) AU2014292293B2 (es)
BR (1) BR112016000941B1 (es)
CA (1) CA2916818C (es)
ES (1) ES2697612T3 (es)
MX (1) MX349246B (es)
SG (1) SG11201510754SA (es)
WO (1) WO2015007549A1 (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9473463B2 (en) * 2014-07-29 2016-10-18 Combined Conditional Access Development & Support, LLC Control word and associated entitlement control message caching and reuse
EP3113501A1 (en) * 2015-06-29 2017-01-04 Nagravision SA Content protection
US10681539B2 (en) * 2015-12-22 2020-06-09 Institute Of Semiconductors, Chinese Academy Of Sciences Multi-band channel encrypting switch control device and control method
US10045040B2 (en) 2016-04-03 2018-08-07 Cisco Technology, Inc. Interleaved watermarking
EP3614293A1 (en) 2018-08-24 2020-02-26 Nagravision S.A. Securing data stored in a memory of an iot device during a low power mode

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JPH05122702A (ja) * 1991-10-28 1993-05-18 Kokusai Denshin Denwa Co Ltd <Kdd> テレビジヨン信号の多重伝送秘話方式
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US5892900A (en) * 1996-08-30 1999-04-06 Intertrust Technologies Corp. Systems and methods for secure transaction management and electronic rights protection
JP3230726B2 (ja) * 1996-03-29 2001-11-19 日立ソフトウエアエンジニアリング株式会社 暗号化通信方法
JP3440763B2 (ja) * 1996-10-25 2003-08-25 富士ゼロックス株式会社 暗号化装置、復号装置、機密データ処理装置、及び情報処理装置
TW412909B (en) 1998-05-07 2000-11-21 Kudelski Sa Mechanism of matching between a receiver and a security module
JP4659357B2 (ja) * 2001-09-21 2011-03-30 ザ・ディレクティービー・グループ・インコーポレイテッド 条件付アクセスモジュールと、集積受信機およびデコーダの対動作を制御する方法および装置
EP1320006A1 (en) * 2001-12-12 2003-06-18 Canal+ Technologies Société Anonyme Processing data
FR2833724A1 (fr) * 2001-12-13 2003-06-20 Canal Plus Technologies Composant electronique numerique protege contre des analyses de type electrique et/ou electromagnetique, notamment dans le domaine de la carte a puce
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US20050144468A1 (en) * 2003-01-13 2005-06-30 Northcutt J. D. Method and apparatus for content protection in a personal digital network environment
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EP1523188A1 (en) * 2003-10-06 2005-04-13 Canal + Technologies Portable security module pairing
US20060143454A1 (en) * 2004-05-27 2006-06-29 Silverbrook Research Pty Ltd Storage of multiple keys in memory
US7757086B2 (en) * 2004-05-27 2010-07-13 Silverbrook Research Pty Ltd Key transportation
EP1800479A4 (en) * 2004-10-15 2010-07-21 Opentv Inc ACCELERATION OF CHANNEL CHANGES
EP1662788A1 (fr) * 2004-11-24 2006-05-31 Nagravision SA Unité de traitement de données audio/vidéo numériques et méthode de contrôle d'accès audites données
JP4692070B2 (ja) * 2005-05-18 2011-06-01 ソニー株式会社 情報処理システム、情報処理装置、情報処理方法、およびプログラム
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Also Published As

Publication number Publication date
AU2014292293A1 (en) 2016-02-04
KR102281972B1 (ko) 2021-07-27
CN105900441A (zh) 2016-08-24
JP6305531B2 (ja) 2018-04-04
EP2827601A1 (fr) 2015-01-21
US10075770B2 (en) 2018-09-11
BR112016000941B1 (pt) 2022-11-29
BR112016000941A2 (es) 2017-07-25
CA2916818A1 (en) 2015-01-22
MX2016000585A (es) 2016-03-16
EP3022940B1 (fr) 2018-09-05
EP3022940A1 (fr) 2016-05-25
US20160173946A1 (en) 2016-06-16
JP2016531474A (ja) 2016-10-06
KR20160034286A (ko) 2016-03-29
SG11201510754SA (en) 2016-02-26
CA2916818C (en) 2022-12-13
ES2697612T3 (es) 2019-01-25
WO2015007549A1 (fr) 2015-01-22
AU2014292293B2 (en) 2017-04-20
CN105900441B (zh) 2018-12-18

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