BR0207581A - Criptografação de uma corrente de vìdeo comprimida - Google Patents

Criptografação de uma corrente de vìdeo comprimida

Info

Publication number
BR0207581A
BR0207581A BR0207581-4A BR0207581A BR0207581A BR 0207581 A BR0207581 A BR 0207581A BR 0207581 A BR0207581 A BR 0207581A BR 0207581 A BR0207581 A BR 0207581A
Authority
BR
Brazil
Prior art keywords
data blocks
encryption
video stream
compressed video
encrypting
Prior art date
Application number
BR0207581-4A
Other languages
English (en)
Other versions
BRPI0207581B1 (pt
Inventor
Eric Chaubert
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 BR0207581A publication Critical patent/BR0207581A/pt
Publication of BRPI0207581B1 publication Critical patent/BRPI0207581B1/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]
    • H04N21/40—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
    • 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 or manipulating encoded video stream scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption
    • H04N21/23476—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption by partially encrypting, e.g. encrypting the ending portion of a movie
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

"CRIPTOGRAFAçãO DE UMA CORRENTE DE VìDEO COMPRIMIDA". O objetivo da presente aplicação é permitir o recebimento de um fluxo de dados comprimidos pelo uso de algoritmos poderosos em terminais tendo pequenas capacidades criptográficas. Esse objetivo é alcançado por um método de criptografação de um fluxo de vídeo comprimido compreendendo blocos de dados independentes e blocos de dados diferenciais, consistindo na criptografação de acordo com um nível diferente de criptografação dos blocos de dados independentes e dos blocos de dados diferenciais.
BRPI0207581A 2001-02-26 2002-02-25 criptografação de um fluxo de vídeo comprimido BRPI0207581B1 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3442001 2001-02-26
PCT/IB2002/000557 WO2002069638A1 (fr) 2001-02-26 2002-02-25 Encryption d'un flux video compresse

Publications (2)

Publication Number Publication Date
BR0207581A true BR0207581A (pt) 2004-04-27
BRPI0207581B1 BRPI0207581B1 (pt) 2016-05-24

Family

ID=4506834

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0207581A BRPI0207581B1 (pt) 2001-02-26 2002-02-25 criptografação de um fluxo de vídeo comprimido

Country Status (10)

Country Link
US (1) US7212636B2 (pt)
EP (1) EP1374588B1 (pt)
KR (1) KR100850825B1 (pt)
CN (1) CN1220384C (pt)
AT (1) ATE303699T1 (pt)
BR (1) BRPI0207581B1 (pt)
CA (1) CA2438599C (pt)
DE (1) DE60205879T2 (pt)
ES (1) ES2248516T3 (pt)
WO (1) WO2002069638A1 (pt)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7224310B2 (en) 2002-11-20 2007-05-29 Nagravision S.A. Method and device for the recognition of the origin of encrypted data broadcasting
AU2003285634A1 (en) * 2002-12-16 2004-07-09 Koninklijke Philips Electronics N.V. Method and apparatus to encrypt video data streams
FR2849307B1 (fr) * 2002-12-24 2006-10-27 Viaccess Sa Procede et systeme de securisation de donnees embrouillees
US20040193871A1 (en) * 2003-03-28 2004-09-30 Broadcom Corporation System and method for transmitting data using selective partial encryption
CN100505866C (zh) * 2004-10-28 2009-06-24 武汉大学 一种视频信息的加解密方法
US20060269055A1 (en) * 2005-05-26 2006-11-30 International Business Machines Corporation Method and apparatus for improving performance and security of DES-CBC encryption algorithm
CN1758587B (zh) * 2005-09-06 2011-10-26 宏碁股份有限公司 资料处理方法
KR20090002939A (ko) * 2007-07-05 2009-01-09 삼성전자주식회사 디지털 방송 서비스에 있어서 비디오 데이터 송수신 장치및 방법
CN101286837B (zh) * 2008-05-13 2012-08-29 江苏大学 一种面向存储区域网的消息加密装置和方法
US10447657B2 (en) 2008-08-22 2019-10-15 Qualcomm Incorporated Method and apparatus for transmitting and receiving secure and non-secure data
US8472625B2 (en) * 2009-09-16 2013-06-25 Broadcom Corporation Method and system for protecting 3D video content
US9008308B2 (en) * 2012-02-08 2015-04-14 Vixs Systems, Inc Container agnostic decryption device and methods for use therewith
US8744078B2 (en) * 2012-06-05 2014-06-03 Secure Channels Sa System and method for securing multiple data segments having different lengths using pattern keys having multiple different strengths
SG11201609457UA (en) 2014-08-07 2016-12-29 Sonic Ip Inc Systems and methods for protecting elementary bitstreams incorporating independently encoded tiles
CN104734723A (zh) * 2015-03-10 2015-06-24 中国人民解放军信息工程大学 一种基于压缩和加扰的数据变换方法
CN106209896B (zh) * 2016-07-29 2020-02-18 网宿科技股份有限公司 基于音视频格式的流媒体加密方法和模块
CN111757062A (zh) * 2020-06-29 2020-10-09 郑州信大捷安信息技术股份有限公司 一种视频流的高效安全传输方法和系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0856356A (ja) * 1994-08-10 1996-02-27 Fujitsu Ltd 符号化装置および復号化装置
US5623549A (en) * 1995-01-30 1997-04-22 Ritter; Terry F. Cipher mechanisms with fencing and balanced block mixing
US5805700A (en) * 1996-10-15 1998-09-08 Intel Corporation Policy based selective encryption of compressed video data
US5949884A (en) * 1996-11-07 1999-09-07 Entrust Technologies, Ltd. Design principles of the shade cipher
KR100389902B1 (ko) * 1997-06-23 2003-09-22 삼성전자주식회사 차분해독법과선형해독법에대하여안전성을보장하는고속블럭암호화방법
US6185679B1 (en) * 1998-02-23 2001-02-06 International Business Machines Corporation Method and apparatus for a symmetric block cipher using multiple stages with type-1 and type-3 feistel networks
ES2270494T3 (es) * 1998-09-01 2007-04-01 Irdeto Access B.V. Sistema de comunicacion de datos.
US6490353B1 (en) * 1998-11-23 2002-12-03 Tan Daniel Tiong Hok Data encrypting and decrypting apparatus and method
US6950517B2 (en) * 2002-07-24 2005-09-27 Qualcomm, Inc. Efficient encryption and authentication for data processing systems
US7415109B2 (en) * 2002-08-23 2008-08-19 Qualcomm Incorporated Partial encryption and full authentication of message blocks

Also Published As

Publication number Publication date
BRPI0207581B1 (pt) 2016-05-24
KR100850825B1 (ko) 2008-08-06
EP1374588A1 (fr) 2004-01-02
CN1494803A (zh) 2004-05-05
KR20040011464A (ko) 2004-02-05
CA2438599C (en) 2011-09-20
DE60205879D1 (de) 2005-10-06
CA2438599A1 (en) 2002-09-06
ATE303699T1 (de) 2005-09-15
US7212636B2 (en) 2007-05-01
EP1374588B1 (fr) 2005-08-31
ES2248516T3 (es) 2006-03-16
US20030133571A1 (en) 2003-07-17
WO2002069638A1 (fr) 2002-09-06
DE60205879T2 (de) 2006-06-08
CN1220384C (zh) 2005-09-21

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 24/05/2016, OBSERVADAS AS CONDICOES LEGAIS.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE A 18A ANUIDADE.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: MANUTENCAO DA EXTINCAO - ART. 78 INCISO IV DA LPI