BRPI0613791A8 - Método para controle de acesso de dados criptografados - Google Patents

Método para controle de acesso de dados criptografados

Info

Publication number
BRPI0613791A8
BRPI0613791A8 BRPI0613791A BRPI0613791A BRPI0613791A8 BR PI0613791 A8 BRPI0613791 A8 BR PI0613791A8 BR PI0613791 A BRPI0613791 A BR PI0613791A BR PI0613791 A BRPI0613791 A BR PI0613791A BR PI0613791 A8 BRPI0613791 A8 BR PI0613791A8
Authority
BR
Brazil
Prior art keywords
control
sending
encrypted data
ecm
password
Prior art date
Application number
BRPI0613791A
Other languages
English (en)
Inventor
Stransky Philippe
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 BRPI0613791A2 publication Critical patent/BRPI0613791A2/pt
Publication of BRPI0613791A8 publication Critical patent/BRPI0613791A8/pt

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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
    • H04N21/23473—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption by pre-encrypting
    • 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]
    • H04N21/40—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, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4405—Processing 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 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
    • H04N21/45—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
    • 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

Abstract

A presente invenção refere-se ao método para controlar o acesso de dados criptografados (CT) por senhas de controle (CW). Estas senhas de controle são recebidas por um módulo de segurança em mensagens de controle (ECM) e retornam para uma unidade de processamento para dados criptografados. Estas mensagens de controle (ECM) contêm, pelos menos, uma primeira senha de controle (CW1) e uma segunda senha de controle (CW2). Cada uma destas senhas de controle permite o acesso aos dados criptografados (CT) durante um determinado tempo chamado criptoperíodo (CP). Este método inclui as etapas de: - envio de referidos dados criptografados para pelo menos uma unidade de processamento; e - envio das mensagens de controle (ECM) para referida unidade de processamento. Este tipo de mensagem de controle (ECM) contém, pelo menos, duas senhas de controle (CW1, CW2) determinadas, sendo enviadas para a unidade de processamento após o envio dos dados criptografados pela primeira senha de controle (CW1) e antes do envio dos dados criptografados pela segunda senha de controle (CW2) mencionada. Este método é caracterizado pelo fato do tempo de deslocamento entre o envio para a unidade de processamento de dados criptografados pela primeira senha de controle (CW1) mencionada e o envio da mensagem de controle (ECM) contendo a primeira senha de controle (CW1) e a segunda senha de controle (CW2) ser superior a 75% do criptoperíodo.
BRPI0613791A 2005-07-07 2006-07-06 Método para controle de acesso de dados criptografados BRPI0613791A8 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP051061869 2005-07-07
EP05106186A EP1742475A1 (fr) 2005-07-07 2005-07-07 Méthode de contrôle d'accès à des données chiffrées
PCT/EP2006/063989 WO2007006736A1 (fr) 2005-07-07 2006-07-06 Methode de controle d'acces a des donnees chiffrees

Publications (2)

Publication Number Publication Date
BRPI0613791A2 BRPI0613791A2 (pt) 2012-12-11
BRPI0613791A8 true BRPI0613791A8 (pt) 2018-02-06

Family

ID=35447707

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0613791A BRPI0613791A8 (pt) 2005-07-07 2006-07-06 Método para controle de acesso de dados criptografados

Country Status (18)

Country Link
US (1) US7986781B2 (pt)
EP (2) EP1742475A1 (pt)
JP (1) JP2008545308A (pt)
KR (1) KR101342743B1 (pt)
CN (1) CN101218823B (pt)
AT (1) ATE443969T1 (pt)
AU (1) AU2006268684A1 (pt)
BR (1) BRPI0613791A8 (pt)
CA (1) CA2614109C (pt)
DE (1) DE602006009398D1 (pt)
ES (1) ES2331925T3 (pt)
HK (1) HK1111021A1 (pt)
IL (1) IL188333A (pt)
MX (1) MX2008000003A (pt)
PL (1) PL1900212T3 (pt)
PT (1) PT1900212E (pt)
RU (1) RU2408157C2 (pt)
WO (1) WO2007006736A1 (pt)

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FR2963191B1 (fr) * 2010-07-23 2012-12-07 Viaccess Sa Procede de detection d'une utilisation illicite d'un processeur de securite
US8687807B2 (en) * 2011-01-26 2014-04-01 Nagrastar, L.L.C. Cascading dynamic crypto periods
US9503785B2 (en) 2011-06-22 2016-11-22 Nagrastar, Llc Anti-splitter violation conditional key change
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EP2869578A1 (fr) * 2013-11-01 2015-05-06 Nagravision S.A. Méthode et dispositif de distribution de licences multimédias au sein d un système de distribution d un service multimédia sécurisé
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Also Published As

Publication number Publication date
CN101218823B (zh) 2010-05-26
WO2007006736A1 (fr) 2007-01-18
PT1900212E (pt) 2009-12-07
ES2331925T3 (es) 2010-01-20
HK1111021A1 (en) 2008-07-25
US7986781B2 (en) 2011-07-26
EP1900212B1 (fr) 2009-09-23
CN101218823A (zh) 2008-07-09
MX2008000003A (es) 2008-04-22
CA2614109C (en) 2013-11-19
IL188333A0 (en) 2008-04-13
RU2007148551A (ru) 2009-08-20
ATE443969T1 (de) 2009-10-15
BRPI0613791A2 (pt) 2012-12-11
JP2008545308A (ja) 2008-12-11
EP1900212A1 (fr) 2008-03-19
AU2006268684A1 (en) 2007-01-18
DE602006009398D1 (de) 2009-11-05
IL188333A (en) 2011-09-27
CA2614109A1 (en) 2007-01-18
KR20080024518A (ko) 2008-03-18
EP1742475A1 (fr) 2007-01-10
RU2408157C2 (ru) 2010-12-27
US20080192927A1 (en) 2008-08-14
PL1900212T3 (pl) 2010-02-26
KR101342743B1 (ko) 2013-12-19

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B06G Technical and formal requirements: other requirements [chapter 6.7 patent gazette]

Free format text: SOLICITA-SE A REGULARIZACAO DA PROCURACAO, UMA VEZ QUE BASEADO NO ARTIGO 216 1O DA LPI, O DOCUMENTO DE PROCURACAO DEVE SER APRESENTADO NO ORIGINAL, TRASLADO OU FOTOCOPIA AUTENTICADA.

B15K Others concerning applications: alteration of classification

Ipc: G11B 20/00 (2006.01), H04N 7/167 (2011.01)

B15K Others concerning applications: alteration of classification

Ipc: H04N 7/167 (2011.01), G11B 20/00 (2006.01)

B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B11B Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements