HK1038666A1 - Method and apparatus for encrypted transmission - Google Patents

Method and apparatus for encrypted transmission

Info

Publication number
HK1038666A1
HK1038666A1 HK01108807A HK01108807A HK1038666A1 HK 1038666 A1 HK1038666 A1 HK 1038666A1 HK 01108807 A HK01108807 A HK 01108807A HK 01108807 A HK01108807 A HK 01108807A HK 1038666 A1 HK1038666 A1 HK 1038666A1
Authority
HK
Hong Kong
Prior art keywords
session key
data
key
communicated
encrypted
Prior art date
Application number
HK01108807A
Other languages
English (en)
Inventor
Michel Maillard
Original Assignee
Canal Plus Technologies
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 Canal Plus Technologies filed Critical Canal Plus Technologies
Publication of HK1038666A1 publication Critical patent/HK1038666A1/xx

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]
    • H04N21/60—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Storage Device Security (AREA)
  • Communication Control (AREA)
  • Computer And Data Communications (AREA)
HK01108807A 1999-02-04 2001-12-14 Method and apparatus for encrypted transmission HK1038666A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP99400261A EP1026898A1 (en) 1999-02-04 1999-02-04 Method and apparatus for encrypted transmission
PCT/IB2000/000163 WO2000046994A1 (en) 1999-02-04 2000-02-04 Method and apparatus for encrypted transmission

Publications (1)

Publication Number Publication Date
HK1038666A1 true HK1038666A1 (en) 2002-03-22

Family

ID=8241870

Family Applications (1)

Application Number Title Priority Date Filing Date
HK01108807A HK1038666A1 (en) 1999-02-04 2001-12-14 Method and apparatus for encrypted transmission

Country Status (22)

Country Link
US (1) US7191335B1 (no)
EP (2) EP1026898A1 (no)
JP (1) JP2002536925A (no)
KR (1) KR100672947B1 (no)
CN (1) CN100477782C (no)
AT (1) ATE247359T1 (no)
AU (1) AU766812B2 (no)
BR (1) BRPI0007934B1 (no)
CA (1) CA2361721A1 (no)
CZ (1) CZ20012824A3 (no)
DE (1) DE60004480T2 (no)
ES (1) ES2204500T3 (no)
HK (1) HK1038666A1 (no)
HU (1) HUP0105292A2 (no)
IL (1) IL144665A0 (no)
MY (1) MY120373A (no)
NO (1) NO20013799L (no)
NZ (1) NZ513745A (no)
PL (1) PL349175A1 (no)
RU (1) RU2001124593A (no)
TR (1) TR200102215T2 (no)
WO (1) WO2000046994A1 (no)

Families Citing this family (100)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08263438A (ja) 1994-11-23 1996-10-11 Xerox Corp ディジタルワークの配給及び使用制御システム並びにディジタルワークへのアクセス制御方法
US6963859B2 (en) 1994-11-23 2005-11-08 Contentguard Holdings, Inc. Content rendering repository
US6233684B1 (en) 1997-02-28 2001-05-15 Contenaguard Holdings, Inc. System for controlling the distribution and use of rendered digital works through watermaking
US6701528B1 (en) * 2000-01-26 2004-03-02 Hughes Electronics Corporation Virtual video on demand using multiple encrypted video segments
US8082572B1 (en) 2000-06-08 2011-12-20 The Directv Group, Inc. Method and apparatus for transmitting, receiving, and utilizing audio/visual signals and other information
US7457414B1 (en) * 2000-07-21 2008-11-25 The Directv Group, Inc. Super encrypted storage and retrieval of media programs with smartcard generated keys
US8140859B1 (en) 2000-07-21 2012-03-20 The Directv Group, Inc. Secure storage and replay of media programs using a hard-paired receiver and storage device
US7203311B1 (en) * 2000-07-21 2007-04-10 The Directv Group, Inc. Super encrypted storage and retrieval of media programs in a hard-paired receiver and storage device
US20020025045A1 (en) * 2000-07-26 2002-02-28 Raike William Michael Encryption processing for streaming media
US7743259B2 (en) 2000-08-28 2010-06-22 Contentguard Holdings, Inc. System and method for digital rights management using a standard rendering engine
US8225414B2 (en) 2000-08-28 2012-07-17 Contentguard Holdings, Inc. Method and apparatus for identifying installed software and regulating access to content
US7343324B2 (en) 2000-11-03 2008-03-11 Contentguard Holdings Inc. Method, system, and computer readable medium for automatically publishing content
DE60103427T2 (de) * 2000-12-22 2005-06-02 Nagravision S.A. Übereinstimmungssteuerverfahren
US6912294B2 (en) 2000-12-29 2005-06-28 Contentguard Holdings, Inc. Multi-stage watermarking process and system
US8069116B2 (en) 2001-01-17 2011-11-29 Contentguard Holdings, Inc. System and method for supplying and managing usage rights associated with an item repository
US7774279B2 (en) 2001-05-31 2010-08-10 Contentguard Holdings, Inc. Rights offering and granting
US7028009B2 (en) 2001-01-17 2006-04-11 Contentguardiholdings, Inc. Method and apparatus for distributing enforceable property rights
US8275709B2 (en) 2001-05-31 2012-09-25 Contentguard Holdings, Inc. Digital rights management of content when content is a future live event
US8099364B2 (en) 2001-05-31 2012-01-17 Contentguard Holdings, Inc. Digital rights management of content when content is a future live event
US8275716B2 (en) 2001-05-31 2012-09-25 Contentguard Holdings, Inc. Method and system for subscription digital rights management
US6876984B2 (en) 2001-05-31 2005-04-05 Contentguard Holdings, Inc. Method and apparatus for establishing usage rights for digital content to be created in the future
US6895503B2 (en) 2001-05-31 2005-05-17 Contentguard Holdings, Inc. Method and apparatus for hierarchical assignment of rights to documents and documents having such rights
US8001053B2 (en) 2001-05-31 2011-08-16 Contentguard Holdings, Inc. System and method for rights offering and granting using shared state variables
US7725401B2 (en) 2001-05-31 2010-05-25 Contentguard Holdings, Inc. Method and apparatus for establishing usage rights for digital content to be created in the future
US7774280B2 (en) 2001-06-07 2010-08-10 Contentguard Holdings, Inc. System and method for managing transfer of rights using shared state variables
WO2002101490A2 (en) 2001-06-07 2002-12-19 Contentguard Holdings, Inc. Cryptographic trust zones in digital rights management
US7409562B2 (en) * 2001-09-21 2008-08-05 The Directv Group, Inc. Method and apparatus for encrypting media programs for later purchase and viewing
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
US7974923B2 (en) 2001-11-20 2011-07-05 Contentguard Holdings, Inc. Extensible rights expression processing system
US7840488B2 (en) 2001-11-20 2010-11-23 Contentguard Holdings, Inc. System and method for granting access to an item or permission to use an item based on configurable conditions
MXPA04004681A (es) 2001-11-20 2004-09-10 Contentguard Holdings Inc Sistema de procesamiento de expresion de derechos extensible.
EP1320006A1 (en) * 2001-12-12 2003-06-18 Canal+ Technologies Société Anonyme Processing data
US20030200548A1 (en) * 2001-12-27 2003-10-23 Paul Baran Method and apparatus for viewer control of digital TV program start time
US7359884B2 (en) 2002-03-14 2008-04-15 Contentguard Holdings, Inc. Method and apparatus for processing usage rights expressions
US7805371B2 (en) 2002-03-14 2010-09-28 Contentguard Holdings, Inc. Rights expression profile system and method
US7305555B2 (en) * 2002-03-27 2007-12-04 General Instrument Corporation Smart card mating protocol
KR100671073B1 (ko) 2002-04-29 2007-01-17 콘텐트가드 홀딩즈 인코포레이티드 적법성 표현 언어를 이용한 권리 관리 시스템
TW200421811A (en) * 2002-09-24 2004-10-16 Nagracard Sa Multiple pairing control method
US20060198520A1 (en) * 2002-12-20 2006-09-07 Peter Courtney Secure transmission of digital audio signals
GB0229781D0 (en) * 2002-12-20 2003-01-29 Courtney Peter Secure transmission of audio signals
FR2850822A1 (fr) * 2003-02-04 2004-08-06 Canal Plus Technologies Systeme de television a peage, procede de revocation de droits dans un tel systeme, decodeur et carte a puce associes, et message transmis a un tel decodeur
US7685642B2 (en) 2003-06-26 2010-03-23 Contentguard Holdings, Inc. System and method for controlling rights expressions by stakeholders of an item
TW200509637A (en) * 2003-07-14 2005-03-01 Nagravision Sa Method to create and manage a local network
US7599494B2 (en) * 2004-01-16 2009-10-06 The Directv Group, Inc. Distribution of video content using a trusted network key for sharing content
US7548624B2 (en) * 2004-01-16 2009-06-16 The Directv Group, Inc. Distribution of broadcast content for remote decryption and viewing
US7801303B2 (en) * 2004-03-01 2010-09-21 The Directv Group, Inc. Video on demand in a broadcast network
EP1626579A1 (en) * 2004-08-11 2006-02-15 Thomson Licensing Device pairing
US9894044B2 (en) * 2004-10-15 2018-02-13 Telecom Italia S.P.A. Method for secure signal transmission in a telecommunication network, in particular in a local area network
US8660961B2 (en) 2004-11-18 2014-02-25 Contentguard Holdings, Inc. Method, system, and device for license-centric content consumption
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
FR2882208B1 (fr) * 2005-02-14 2007-05-11 Viaccess Sa Procede et systeme de reception d'un signal multimedia, entite cryptographique pour ce procede de reception et systeme, procede et boite noire pour la fabrication de l'entite cryptographique
US7562219B2 (en) * 2005-04-04 2009-07-14 Research In Motion Limited Portable smart card reader having secure wireless communications capability
KR100820810B1 (ko) * 2005-04-29 2008-04-10 엘지전자 주식회사 디지털 수신 시스템의 제한 수신 방법
US9325944B2 (en) * 2005-08-11 2016-04-26 The Directv Group, Inc. Secure delivery of program content via a removable storage medium
US7885412B2 (en) * 2005-09-29 2011-02-08 International Business Machines Corporation Pre-generation of generic session keys for use in communicating within communications environments
US7720767B2 (en) 2005-10-24 2010-05-18 Contentguard Holdings, Inc. Method and system to support dynamic rights and resources sharing
DE102005060287B4 (de) * 2005-12-15 2007-10-11 Technisat Digital Gmbh Verfahren zum Betrieb eines Systems mit bedingtem Zugang
DE102005060285B4 (de) * 2005-12-15 2007-11-29 Technisat Digital Gmbh Verfahren zur Entschlüsselung verschlüsselter DVB-Signale
DE102005060288A1 (de) * 2005-12-15 2007-06-21 Technisat Digital Gmbh Verfahren und Anordnung zum Betrieb eines Entschlüsselungssystems in einem digital Receiver
US7515710B2 (en) 2006-03-14 2009-04-07 Divx, Inc. Federated digital rights management scheme including trusted systems
WO2007132165A1 (en) * 2006-05-04 2007-11-22 Nds Limited Scrambled digital data item
US8001565B2 (en) * 2006-05-15 2011-08-16 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at receivers in pay delivery systems
US8775319B2 (en) 2006-05-15 2014-07-08 The Directv Group, Inc. Secure content transfer systems and methods to operate the same
US7992175B2 (en) 2006-05-15 2011-08-02 The Directv Group, Inc. Methods and apparatus to provide content on demand in content broadcast systems
US20070265966A1 (en) * 2006-05-15 2007-11-15 The Directv Group, Inc. Content delivery systems and methods to operate the same
US8996421B2 (en) * 2006-05-15 2015-03-31 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at broadcast headends in pay delivery systems
US8095466B2 (en) * 2006-05-15 2012-01-10 The Directv Group, Inc. Methods and apparatus to conditionally authorize content delivery at content servers in pay delivery systems
US8495380B2 (en) * 2006-06-06 2013-07-23 Red Hat, Inc. Methods and systems for server-side key generation
US9225761B2 (en) * 2006-08-04 2015-12-29 The Directv Group, Inc. Distributed media-aggregation systems and methods to operate the same
US9178693B2 (en) * 2006-08-04 2015-11-03 The Directv Group, Inc. Distributed media-protection systems and methods to operate the same
US8024579B2 (en) * 2006-12-29 2011-09-20 Lenovo (Singapore) Pte Ltd. Authenticating suspect data using key tables
WO2008103000A1 (en) * 2007-02-23 2008-08-28 Koreacenter Co., Ltd System and method of transmitting/receiving security data
KR100867130B1 (ko) 2007-02-23 2008-11-06 (주)코리아센터닷컴 보안 데이터 송수신 시스템 및 방법
JP2008311710A (ja) * 2007-06-12 2008-12-25 Funai Electric Co Ltd 放送受信装置
EP2009837A1 (fr) * 2007-06-26 2008-12-31 Gemplus Procédé de génération embarqué d'un identifiant et d'une clé associée dans un objet portable communiquant
DE102007030675B4 (de) 2007-07-02 2009-12-03 Technisat Digital Gmbh Verfahren und Vorrichtung zur Entschlüsselung in mehreren verschiedenen Transportströmen enthaltener Dienste
US8543831B2 (en) * 2007-11-14 2013-09-24 Qimonda Ag System and method for establishing data connections between electronic devices
US9143493B2 (en) 2007-12-20 2015-09-22 The Directv Group, Inc. Method and apparatus for communicating between a user device and a gateway device to form a system to allow a partner service to be provided to the user device
CN101631226B (zh) * 2008-07-17 2011-09-21 承景科技股份有限公司 电视系统的解密装置及解密方法
US10057641B2 (en) 2009-03-25 2018-08-21 Sony Corporation Method to upgrade content encryption
WO2010119453A2 (en) * 2009-04-13 2010-10-21 Centre For Development Of Telematics (C-Dot) Interoperability of set top box through smart card
US20110029516A1 (en) * 2009-07-30 2011-02-03 Microsoft Corporation Web-Used Pattern Insight Platform
WO2011068668A1 (en) * 2009-12-04 2011-06-09 Divx, Llc Elementary bitstream cryptographic material transport systems and methods
FR2960327B1 (fr) * 2010-05-20 2015-10-16 Oberthur Technologies Procede et systeme d'acces a un circuit integre comprenant une cle personnelle d'authentification
EP2641208B1 (en) 2010-11-19 2020-04-29 Nagravision S.A. Method to detect cloned software
US9467708B2 (en) 2011-08-30 2016-10-11 Sonic Ip, Inc. Selection of resolutions for seamless resolution switching of multimedia content
US8909922B2 (en) 2011-09-01 2014-12-09 Sonic Ip, Inc. Systems and methods for playing back alternative streams of protected content protected using common cryptographic information
KR101846191B1 (ko) * 2011-09-21 2018-04-09 삼성전자주식회사 서버, 클라이언트 기기, 전송 스트림 생성 방법 및 전송 스트림 처리 방법
JP5541275B2 (ja) * 2011-12-28 2014-07-09 富士通株式会社 情報処理装置および不正アクセス防止方法
US8745654B1 (en) 2012-02-09 2014-06-03 The Directv Group, Inc. Method and system for managing digital rights for content
CN102684868B (zh) * 2012-04-20 2015-03-04 上海卫星工程研究所 气象卫星数据加密方法
US9313510B2 (en) 2012-12-31 2016-04-12 Sonic Ip, Inc. Use of objective quality measures of streamed content to reduce streaming bandwidth
US9191457B2 (en) 2012-12-31 2015-11-17 Sonic Ip, Inc. Systems, methods, and media for controlling delivery of content
US9094737B2 (en) 2013-05-30 2015-07-28 Sonic Ip, Inc. Network video streaming with trick play based on separate trick play files
US9756074B2 (en) * 2013-12-26 2017-09-05 Fireeye, Inc. System and method for IPS and VM-based detection of suspicious objects
US9866878B2 (en) 2014-04-05 2018-01-09 Sonic Ip, Inc. Systems and methods for encoding and playing back video at different frame rates using enhancement layers
AU2015374202B2 (en) 2014-12-29 2019-02-14 Visa International Service Association Over-the-air provisioning of application library
CN105812139B (zh) * 2014-12-31 2019-10-25 北京华大智宝电子系统有限公司 一种安全认证方法及系统
US9467726B1 (en) 2015-09-30 2016-10-11 The Directv Group, Inc. Systems and methods for provisioning multi-dimensional rule based entitlement offers
US10984115B2 (en) 2018-12-04 2021-04-20 Bank Of America Corporation System for triple format preserving encryption

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5870474A (en) * 1995-12-04 1999-02-09 Scientific-Atlanta, Inc. Method and apparatus for providing conditional access in connection-oriented, interactive networks with a multiplicity of service providers
US4578530A (en) * 1981-06-26 1986-03-25 Visa U.S.A., Inc. End-to-end encryption system and method of operation
US5253294A (en) * 1983-02-22 1993-10-12 At&T Bell Laboratories Secure transmission system
CH682614A5 (fr) 1990-02-21 1993-10-15 Kudelski Sa Procédé d'embrouillage et de désembrouillage d'un signal vidéo.
US5835726A (en) * 1993-12-15 1998-11-10 Check Point Software Technologies Ltd. System for securing the flow of and selectively modifying packets in a computer network
US5748735A (en) * 1994-07-18 1998-05-05 Bell Atlantic Network Services, Inc. Securing E-mail communications and encrypted file storage using yaksha split private key asymmetric cryptography
FR2729521A1 (fr) * 1995-01-17 1996-07-19 Thomson Consumer Electronics Procede de protection des messages de gestion d'un systeme de controle d'acces et dispositif pour sa mise en oeuvre
JP2812312B2 (ja) * 1996-01-12 1998-10-22 三菱電機株式会社 暗号化システム
FR2750554B1 (fr) * 1996-06-28 1998-08-14 Thomson Multimedia Sa Systeme a acces conditionnel et carte a puce permettant un tel acces
US5907618A (en) * 1997-01-03 1999-05-25 International Business Machines Corporation Method and apparatus for verifiably providing key recovery information in a cryptographic system
JP3988172B2 (ja) * 1997-04-23 2007-10-10 ソニー株式会社 情報処理装置および方法、並びに記録媒体
US6662299B1 (en) * 1999-10-28 2003-12-09 Pgp Corporation Method and apparatus for reconstituting an encryption key based on multiple user responses

Also Published As

Publication number Publication date
HUP0105292A2 (en) 2002-04-29
CN1346570A (zh) 2002-04-24
CN100477782C (zh) 2009-04-08
AU2314900A (en) 2000-08-25
NO20013799L (no) 2001-10-04
WO2000046994A1 (en) 2000-08-10
TR200102215T2 (tr) 2001-11-21
JP2002536925A (ja) 2002-10-29
IL144665A0 (en) 2002-05-23
DE60004480T2 (de) 2004-07-01
ES2204500T3 (es) 2004-05-01
EP1151608A1 (en) 2001-11-07
EP1151608B1 (en) 2003-08-13
KR20010101778A (ko) 2001-11-14
KR100672947B1 (ko) 2007-01-22
NO20013799D0 (no) 2001-08-02
CZ20012824A3 (cs) 2002-02-13
RU2001124593A (ru) 2003-07-20
PL349175A1 (en) 2002-07-01
ATE247359T1 (de) 2003-08-15
AU766812B2 (en) 2003-10-23
BR0007934A (pt) 2001-11-13
NZ513745A (en) 2001-09-28
US7191335B1 (en) 2007-03-13
MY120373A (en) 2005-10-31
EP1026898A1 (en) 2000-08-09
DE60004480D1 (de) 2003-09-18
BRPI0007934B1 (pt) 2016-03-22
CA2361721A1 (en) 2000-08-10

Similar Documents

Publication Publication Date Title
HK1038666A1 (en) Method and apparatus for encrypted transmission
GR3034392T3 (en) Method for providing a secure communication between two devices and application of this method
JP2002536925A5 (no)
NO20001649D0 (no) FremgangsmÕte og anordning ved overføring av kryptert datastrøm
AU4852600A (en) Method and apparatus for preventing piracy of digital content
HUP0301133A2 (hu) Kábeltelevíziós vevőberendezés, eljárás információtovábbítás vezérlésére kábeltelevíziós vevőberendezésben, eltávolítható biztonsági modul és eltávolítható dekódoló modul
GB2326571B (en) An apparatus and method for re-encrypting data
RU2001104413A (ru) Способ защищенной передачи информации между множеством цифровых аудиовизуальных устройств, устройство для защищенной передачи информации между множеством цифровых аудиовизуальных устройств
JP2003517218A5 (ja) オーディオ／ビジュアル・ストリームを保護する方法およびサービス・プロバイダと、スマートカードが結合されたホスト装置の間におけるアクセスを管理するシステム
NZ503813A (en) Method and apparatus for recording of encrypted digital data on a portable token
KR20010027550A (ko) 하드 디스크 드라이브를 구비하는 방송 수신 시스템의 복사 방지장치 및 방법
WO2003077084A3 (en) Implementation of storing secret information in data storage reader products
MXPA01010347A (es) Metodo de y aparato para proporcionar la comunicacion segura de datos digitales entre dispositivos.
IL160831A0 (en) Method for data broadcast between a local server and local peripherals
WO2005008951A3 (fr) Procede, systeme et supports d'enregistrement de chiffrement et/ou de dechiffrement traçable
JP2002158654A (ja) 情報処理装置、表示装置、デジタルコンテンツ配布システム、および、デジタルコンテンツ配布・出力方法
JP2002305512A5 (no)
HK1027179A1 (en) System for providing encrypted data, system for decrypting encrypted data and method for providing acommunication interface in such a decrypting syst em
EP1505764A4 (en) DATA ENCRYPTION AND DECOMPOSITION METHOD AND DEVICE
JP4476756B2 (ja) チューナカード、ホスト装置及び受信装置
JP2005057459A (ja) デジタル受信機における著作権保護方法
DK0638866T3 (da) Fremgangsmåde og apparat til at kryptere og dekryptere information
CA2250833A1 (en) Method for providing a secure communication between two devices and application of this method
JPH04163576A (ja) 情報暗号化装置
RU98120105A (ru) Способ обеспечения защищенной связи между двумя устройствами и его применение

Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20190204