WO2000060846A3 - Selective and renewable encryption for secure distribution of video on-demand - Google Patents

Selective and renewable encryption for secure distribution of video on-demand Download PDF

Info

Publication number
WO2000060846A3
WO2000060846A3 PCT/US2000/009045 US0009045W WO0060846A3 WO 2000060846 A3 WO2000060846 A3 WO 2000060846A3 US 0009045 W US0009045 W US 0009045W WO 0060846 A3 WO0060846 A3 WO 0060846A3
Authority
WO
WIPO (PCT)
Prior art keywords
digital video
video program
encryption
encrypted
predetermined criterion
Prior art date
Application number
PCT/US2000/009045
Other languages
French (fr)
Other versions
WO2000060846A2 (en
Inventor
Michael Robert Colligan
Yong Ho Son
Christopher Goode
Original Assignee
Diva Systems Corp
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 Diva Systems Corp filed Critical Diva Systems Corp
Priority to CA002369118A priority Critical patent/CA2369118C/en
Priority to AU43304/00A priority patent/AU4330400A/en
Priority to GB0123375A priority patent/GB2363278B/en
Publication of WO2000060846A2 publication Critical patent/WO2000060846A2/en
Publication of WO2000060846A3 publication Critical patent/WO2000060846A3/en

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
    • H04N21/23—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
    • H04N21/23476—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 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
    • 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]
    • H04N21/26609—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] using retrofitting techniques, e.g. by re-encrypting the control words used for pre-encryption
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications

Abstract

Selective encryption is provided in a process which includes: determining whether a predetermined criterion is satisfied; setting a selective encryption status field (1402) if the predetermined criterion is satisfied; and encrypting an unencrypted payload to generate an encrypted payload, and constructing a packet with the encrypted payload (1406), if the predetermined criterion is satisfied. The predetermined criterion may be one of several criteria, each of which reduce the required amount of encryption and decryption while maintaining a high level of security. Renewable encryption is provided in a process which includes: copying a first encrypted digital video program from a remote server to a video source; decrypting the first encrypted digital video program using a first key to generate an unencrypted digital video program; encrypting the unencrypted digital video program using a second key to generate a second encrypted digital video program; transmitting the second encrypted digital video program from the video source to the remote server; and deleting the first encrypted digital video program from the remote server.
PCT/US2000/009045 1999-04-07 2000-04-05 Selective and renewable encryption for secure distribution of video on-demand WO2000060846A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002369118A CA2369118C (en) 1999-04-07 2000-04-05 Selective and renewable encryption for secure distribution of video on-demand
AU43304/00A AU4330400A (en) 1999-04-07 2000-04-05 Selective and renewable encryption for secure distribution of video on-demand
GB0123375A GB2363278B (en) 1999-04-07 2000-04-05 Selective and renewable encryption for secure distribution of video on-demand

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US12822499P 1999-04-07 1999-04-07
US60/128,224 1999-04-07
US13116299P 1999-04-26 1999-04-26
US60/131,162 1999-04-26
US09/528,580 2000-03-20
US09/528,580 US6415031B1 (en) 1999-03-12 2000-03-20 Selective and renewable encryption for secure distribution of video on-demand

Publications (2)

Publication Number Publication Date
WO2000060846A2 WO2000060846A2 (en) 2000-10-12
WO2000060846A3 true WO2000060846A3 (en) 2001-04-19

Family

ID=27383690

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/009045 WO2000060846A2 (en) 1999-04-07 2000-04-05 Selective and renewable encryption for secure distribution of video on-demand

Country Status (5)

Country Link
US (1) US6415031B1 (en)
AU (1) AU4330400A (en)
CA (1) CA2369118C (en)
GB (1) GB2363278B (en)
WO (1) WO2000060846A2 (en)

Families Citing this family (273)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6020189A (en) * 1996-08-30 2000-02-01 The Johns Hopkins University School Of Medicine Fibroblast growth factor homologous factors (FHFs) and methods of use
JP4763866B2 (en) * 1998-10-15 2011-08-31 インターシア ソフトウェア エルエルシー Method and apparatus for protecting digital data by double re-encryption
US6697489B1 (en) 1999-03-30 2004-02-24 Sony Corporation Method and apparatus for securing control words
US7730300B2 (en) 1999-03-30 2010-06-01 Sony Corporation Method and apparatus for protecting the transfer of data
US8055894B2 (en) 1999-11-09 2011-11-08 Google Inc. Process and streaming server for encrypting a data stream with bandwidth based variation
US6449719B1 (en) 1999-11-09 2002-09-10 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream
US7039614B1 (en) 1999-11-09 2006-05-02 Sony Corporation Method for simulcrypting scrambled data to a plurality of conditional access devices
US6701528B1 (en) 2000-01-26 2004-03-02 Hughes Electronics Corporation Virtual video on demand using multiple encrypted video segments
US7593529B1 (en) * 2000-01-27 2009-09-22 Agere Systems Inc. Scramble methods and apparatus for packetized digital video signal in conditional access system
US6898285B1 (en) * 2000-06-02 2005-05-24 General Instrument Corporation System to deliver encrypted access control information to support interoperability between digital information processing/control equipment
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
US20030206631A1 (en) * 2000-06-22 2003-11-06 Candelore Brant L. Method and apparatus for scrambling program data for furture viewing
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
US7165175B1 (en) * 2000-09-06 2007-01-16 Widevine Technologies, Inc. Apparatus, system and method for selectively encrypting different portions of data sent over a network
US7080397B2 (en) * 2000-10-26 2006-07-18 General Instrument Corporation Communication protocol for content on demand system with callback time
US20020083438A1 (en) * 2000-10-26 2002-06-27 So Nicol Chung Pang System for securely delivering encrypted content on demand with access contrl
US7257227B2 (en) * 2000-10-26 2007-08-14 General Instrument Corporation System for denying access to content generated by a compromised off line encryption device and for conveying cryptographic keys from multiple conditional access systems
WO2002047388A2 (en) 2000-11-14 2002-06-13 Scientific-Atlanta, Inc. Networked subscriber television distribution
US8127326B2 (en) 2000-11-14 2012-02-28 Claussen Paul J Proximity detection using wireless connectivity in a communications system
US7150045B2 (en) * 2000-12-14 2006-12-12 Widevine Technologies, Inc. Method and apparatus for protection of electronic media
DE60119678T3 (en) * 2000-12-15 2010-09-16 Panasonic Corp., Kadoma Receiving device with a recording unit for recording an encrypted broadcasting signal and a broadcasting device for encrypting a signal to be broadcast, and associated methods
JP4752113B2 (en) * 2001-01-16 2011-08-17 ソニー株式会社 Electronic device and signal transmission method
US7383329B2 (en) 2001-02-13 2008-06-03 Aventail, Llc Distributed cache for state transfer operations
US7353380B2 (en) * 2001-02-12 2008-04-01 Aventail, Llc, A Subsidiary Of Sonicwall, Inc. Method and apparatus for providing secure streaming data transmission facilities using unreliable protocols
US7360075B2 (en) * 2001-02-12 2008-04-15 Aventail Corporation, A Wholly Owned Subsidiary Of Sonicwall, Inc. Method and apparatus for providing secure streaming data transmission facilities using unreliable protocols
US20020114360A1 (en) * 2001-02-20 2002-08-22 Perlman Stephen G. System and method for processing multiple broadcast multimedia streams
US20020129243A1 (en) * 2001-03-08 2002-09-12 Viswanath Nanjundiah System for selective encryption of data packets
US7093277B2 (en) * 2001-05-30 2006-08-15 Digeo, Inc. System and method for improved multi-stream multimedia transmission and processing
US7386129B2 (en) * 2001-05-30 2008-06-10 Digeo, Inc. System and method for multimedia content simulcast
US7747853B2 (en) 2001-06-06 2010-06-29 Sony Corporation IP delivery of secure digital content
US7124303B2 (en) * 2001-06-06 2006-10-17 Sony Corporation Elementary stream partial encryption
US7895616B2 (en) 2001-06-06 2011-02-22 Sony Corporation Reconstitution of program streams split across multiple packet identifiers
US20060159264A1 (en) * 2001-07-03 2006-07-20 Chen Annie O System for denying access to content generated by a compromised off line encryption device and for conveying cryptographic keys from multiple conditional access systems
GB0116713D0 (en) * 2001-07-09 2001-08-29 Amino Holdings Ltd Variable security encryption method and apparatus
US7463737B2 (en) * 2001-08-15 2008-12-09 Digeo, Inc. System and method for conditional access key encryption
US7039955B2 (en) 2001-09-14 2006-05-02 The Directv Group, Inc. Embedded blacklisting for digital broadcast system security
JP4659357B2 (en) 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 Method and apparatus for controlling paired operation of conditional access module and integrated receiver and decoder
FR2831363A3 (en) * 2001-10-22 2003-04-25 Bahia 21 Corp Method and system for secure transmission of video documents to associated electronic personnel assistants
US7765567B2 (en) 2002-01-02 2010-07-27 Sony Corporation Content replacement by PID mapping
US7823174B2 (en) 2002-01-02 2010-10-26 Sony Corporation Macro-block based content replacement by PID mapping
US8051443B2 (en) 2002-01-02 2011-11-01 Sony Corporation Content replacement by PID mapping
US7292691B2 (en) * 2002-01-02 2007-11-06 Sony Corporation Progressive video refresh slice detection
KR100988435B1 (en) * 2002-01-02 2010-10-18 소니 일렉트로닉스 인코포레이티드 Apparatus and method for decrypting signals
US7233669B2 (en) * 2002-01-02 2007-06-19 Sony Corporation Selective encryption to enable multiple decryption keys
US7292690B2 (en) 2002-01-02 2007-11-06 Sony Corporation Video scene change detection
US7039938B2 (en) * 2002-01-02 2006-05-02 Sony Corporation Selective encryption for video on demand
US7305700B2 (en) * 2002-01-08 2007-12-04 Seven Networks, Inc. Secure transport for mobile communication network
US7328345B2 (en) * 2002-01-29 2008-02-05 Widevine Technologies, Inc. Method and system for end to end securing of content for video on demand
JP3925218B2 (en) 2002-01-30 2007-06-06 ソニー株式会社 Streaming system and streaming method, streaming server and data distribution method, client terminal and data decoding method, program and recording medium
FR2835387B1 (en) * 2002-01-30 2006-08-11 Lecomte Daniel SECURE DEVICE FOR DISSEMINATION, ACCESS, COPYING, REGISTRATION, ON-DEMAND VISUALIZATION AND MANAGEMENT OF THE RIGHTS OF HIGH-QUALITY AUDIOVISUAL WORKS
US7305704B2 (en) * 2002-03-16 2007-12-04 Trustedflow Systems, Inc. Management of trusted flow system
DE10212656A1 (en) * 2002-03-21 2003-10-02 Scm Microsystems Gmbh Selective encryption of multimedia data
US7299292B2 (en) * 2002-03-29 2007-11-20 Widevine Technologies, Inc. Process and streaming server for encrypting a data stream to a virtual smart card client system
JP4366102B2 (en) * 2002-05-01 2009-11-18 キヤノン株式会社 Media data processing apparatus and method
CN100591004C (en) * 2002-05-09 2010-02-17 奥尼西克集团有限公司 Centralized encryption management system
US7239880B2 (en) * 2002-06-12 2007-07-03 Interdigital Technology Corporation Method and apparatus for delivering multimedia multicast services over wireless communication systems
US7516470B2 (en) 2002-08-02 2009-04-07 Cisco Technology, Inc. Locally-updated interactive program guide
US7167560B2 (en) * 2002-08-08 2007-01-23 Matsushita Electric Industrial Co., Ltd. Partial encryption of stream-formatted media
US8818896B2 (en) 2002-09-09 2014-08-26 Sony Corporation Selective encryption with coverage encryption
CA2498346C (en) * 2002-09-09 2011-11-22 Sony Electronics Inc. Selective encryption for video on demand
US7594271B2 (en) * 2002-09-20 2009-09-22 Widevine Technologies, Inc. Method and system for real-time tamper evidence gathering for software
US7908625B2 (en) 2002-10-02 2011-03-15 Robertson Neil C Networked multimedia system
US7545935B2 (en) * 2002-10-04 2009-06-09 Scientific-Atlanta, Inc. Networked multimedia overlay system
US8046806B2 (en) 2002-10-04 2011-10-25 Wall William E Multiroom point of deployment module
US7360235B2 (en) 2002-10-04 2008-04-15 Scientific-Atlanta, Inc. Systems and methods for operating a peripheral record/playback device in a networked multimedia system
US20040083360A1 (en) * 2002-10-28 2004-04-29 Rod Walsh System and method for partially-encrypted data transmission and reception
US7724907B2 (en) 2002-11-05 2010-05-25 Sony Corporation Mechanism for protecting the transfer of digital content
US8572408B2 (en) 2002-11-05 2013-10-29 Sony Corporation Digital rights management of a digital device
US7225458B2 (en) * 2002-11-21 2007-05-29 The Directv Group, Inc. Method and apparatus for ensuring reception of conditional access information in multi-tuner receivers
US7000241B2 (en) * 2002-11-21 2006-02-14 The Directv Group, Inc. Method and apparatus for minimizing conditional access information overhead while ensuring conditional access information reception in multi-tuner receivers
US8645988B2 (en) 2002-12-13 2014-02-04 Sony Corporation Content personalization for digital content
US8667525B2 (en) 2002-12-13 2014-03-04 Sony Corporation Targeted advertisement selection from a digital stream
US20060165232A1 (en) * 2002-12-16 2006-07-27 Dzevdet Burazerovic Method and apparatus to encrypt video data streams
US7853563B2 (en) 2005-08-01 2010-12-14 Seven Networks, Inc. Universal data aggregation
US7917468B2 (en) 2005-08-01 2011-03-29 Seven Networks, Inc. Linking of personal information management data
US8468126B2 (en) 2005-08-01 2013-06-18 Seven Networks, Inc. Publishing data in an information community
US7487532B2 (en) 2003-01-15 2009-02-03 Cisco Technology, Inc. Optimization of a full duplex wideband communications system
US8094640B2 (en) 2003-01-15 2012-01-10 Robertson Neil C Full duplex wideband communications system for a local coaxial network
FR2850826B1 (en) * 2003-02-04 2005-04-01 Medialive PROTECTIVE METHOD AND DEVICE FOR SECURE DIFFUSION OF AUDIOVISUAL WORKS
FR2851112B1 (en) * 2003-02-07 2005-06-03 Medialive SECURE DEVICE FOR DIFFUSION, RECORDING AND VISUALIZATION ON DEMAND OF AUDIOVISUAL WORKS IN THE MPEG-2TS TYPE
US7320069B1 (en) * 2003-02-14 2008-01-15 Novell, Inc. Selective encryption of media data
EP1597899A1 (en) * 2003-02-28 2005-11-23 Matsushita Electric Industrial Co., Ltd. System and method for content history log collection for digital rights management
US7007170B2 (en) * 2003-03-18 2006-02-28 Widevine Technologies, Inc. System, method, and apparatus for securely providing content viewable on a secure device
US7356143B2 (en) 2003-03-18 2008-04-08 Widevine Technologies, Inc System, method, and apparatus for securely providing content viewable on a secure device
US20040193871A1 (en) * 2003-03-28 2004-09-30 Broadcom Corporation System and method for transmitting data using selective partial encryption
US7660352B2 (en) * 2003-04-04 2010-02-09 Sony Corporation Apparatus and method of parallel processing an MPEG-4 data stream
US20040199771A1 (en) * 2003-04-04 2004-10-07 Widevine Technologies, Inc. Method for tracing a security breach in highly distributed content
FR2854530B1 (en) 2003-05-02 2005-07-22 Medialive METHOD AND DEVICE FOR SECURING THE TRANSMISSION, RECORDING AND VISUALIZATION OF DIGITAL AUDIOVISUAL EMPTY STREAMS
US20070083899A1 (en) * 2003-07-10 2007-04-12 Compton Charles L Distributed and scalable architecture for on demand session and resource manangement
US8213769B2 (en) * 2003-08-06 2012-07-03 Broadcom Corporation Frame indexing technique to improve personal video recording functionality and security of transmitted video
FR2858899B1 (en) * 2003-08-11 2005-12-02 Medialive SECURE DISTRIBUTED METHOD AND SYSTEM FOR AUDIOVISUAL FLOW PROTECTION AND DISTRIBUTION
US20050060420A1 (en) * 2003-09-11 2005-03-17 Kovacevic Branko D. System for decoding multimedia data and method thereof
US7286667B1 (en) * 2003-09-15 2007-10-23 Sony Corporation Decryption system
US7346163B2 (en) * 2003-10-31 2008-03-18 Sony Corporation Dynamic composition of pre-encrypted video on demand content
US7263187B2 (en) * 2003-10-31 2007-08-28 Sony Corporation Batch mode session-based encryption of video on demand content
US7853980B2 (en) 2003-10-31 2010-12-14 Sony Corporation Bi-directional indices for trick mode video-on-demand
US7343013B2 (en) 2003-12-16 2008-03-11 Sony Corporation Composite session-based encryption of video on demand content
US8472792B2 (en) 2003-12-08 2013-06-25 Divx, Llc Multimedia distribution system
US7519274B2 (en) 2003-12-08 2009-04-14 Divx, Inc. File format for multiple track digital data
US20050193205A1 (en) * 2004-01-09 2005-09-01 Widevine Technologies, Inc. Method and system for session based watermarking of encrypted content
US7580523B2 (en) * 2004-01-16 2009-08-25 The Directv Group, Inc. Distribution of video content using client to host pairing of integrated receivers/decoders
US7548624B2 (en) * 2004-01-16 2009-06-16 The Directv Group, Inc. Distribution of broadcast content for remote decryption and viewing
US7599494B2 (en) * 2004-01-16 2009-10-06 The Directv Group, Inc. Distribution of video content using a trusted network key for sharing content
US20050163483A1 (en) * 2004-01-22 2005-07-28 Widevine Technologies, Inc. Piracy prevention system
JP4475235B2 (en) * 2004-01-28 2010-06-09 日本電気株式会社 Content encoding, distribution and reception method, apparatus, system, and program
US20050175184A1 (en) * 2004-02-11 2005-08-11 Phonex Broadband Corporation Method and apparatus for a per-packet encryption system
US7801303B2 (en) 2004-03-01 2010-09-21 The Directv Group, Inc. Video on demand in a broadcast network
US20050216941A1 (en) * 2004-03-26 2005-09-29 Primedia Workplace Learning, Lp System and method for controlling video-on-demand content
US7590243B2 (en) * 2004-05-04 2009-09-15 The Directv Group, Inc. Digital media conditional access system for handling digital media content
US20060021037A1 (en) * 2004-06-24 2006-01-26 Widevine Technologies, Inc. Apparatus, system, and method for protecting content using fingerprinting and real-time evidence gathering
US20060013555A1 (en) * 2004-07-01 2006-01-19 Thomas Poslinski Commercial progress bar
US20060013556A1 (en) * 2004-07-01 2006-01-19 Thomas Poslinski Commercial information and guide
US20060013557A1 (en) * 2004-07-01 2006-01-19 Thomas Poslinski Suppression of trick modes in commercial playback
US20060013554A1 (en) * 2004-07-01 2006-01-19 Thomas Poslinski Commercial storage and retrieval
AU2004321892B2 (en) * 2004-07-26 2008-02-14 Irdeto Access B.V. Method of partially scrambling a data stream
US7543317B2 (en) * 2004-08-17 2009-06-02 The Directv Group, Inc. Service activation of set-top box functionality using broadcast conditional access system
US9609279B2 (en) 2004-09-24 2017-03-28 Google Inc. Method and system for providing secure CODECS
US7441271B2 (en) 2004-10-20 2008-10-21 Seven Networks Method and apparatus for intercepting events in a communication system
US8010082B2 (en) 2004-10-20 2011-08-30 Seven Networks, Inc. Flexible billing architecture
US7706781B2 (en) 2004-11-22 2010-04-27 Seven Networks International Oy Data security in a mobile e-mail service
FI117152B (en) 2004-12-03 2006-06-30 Seven Networks Internat Oy E-mail service provisioning method for mobile terminal, involves using domain part and further parameters to generate new parameter set in list of setting parameter sets, if provisioning of e-mail service is successful
US7895617B2 (en) 2004-12-15 2011-02-22 Sony Corporation Content substitution editor
US8041190B2 (en) 2004-12-15 2011-10-18 Sony Corporation System and method for the creation, synchronization and delivery of alternate content
US20080015999A1 (en) * 2005-02-04 2008-01-17 Widevine Technologies, Inc. Securely ingesting encrypted content into content servers
US20060225083A1 (en) * 2005-03-01 2006-10-05 Widevine Technologies, Inc. System and method for motion picture print forensics
US7877703B1 (en) 2005-03-14 2011-01-25 Seven Networks, Inc. Intelligent rendering of information in a limited display environment
US7349886B2 (en) * 2005-03-25 2008-03-25 Widevine Technologies, Inc. Securely relaying content using key chains
US7796742B1 (en) 2005-04-21 2010-09-14 Seven Networks, Inc. Systems and methods for simplified provisioning
US8438633B1 (en) 2005-04-21 2013-05-07 Seven Networks, Inc. Flexible real-time inbox access
WO2006126191A2 (en) * 2005-05-23 2006-11-30 Discretix Technologies Ltd. Method, device, and system of encrypting/decrypting data
WO2006136660A1 (en) 2005-06-21 2006-12-28 Seven Networks International Oy Maintaining an ip connection in a mobile network
US8069166B2 (en) 2005-08-01 2011-11-29 Seven Networks, Inc. Managing user-to-user contact with inferred presence information
US20070033408A1 (en) * 2005-08-08 2007-02-08 Widevine Technologies, Inc. Preventing illegal distribution of copy protected content
US9325944B2 (en) 2005-08-11 2016-04-26 The Directv Group, Inc. Secure delivery of program content via a removable storage medium
US20070067643A1 (en) * 2005-09-21 2007-03-22 Widevine Technologies, Inc. System and method for software tamper detection
WO2007038245A2 (en) 2005-09-23 2007-04-05 Widevine Technologies, Inc. Method for evolving detectors to detect malign behavior in an artificial immune system
US8065733B2 (en) * 2005-09-23 2011-11-22 Google, Inc. Method for evolving detectors to detect malign behavior in an artificial immune system
US7817608B2 (en) * 2005-09-23 2010-10-19 Widevine Technologies, Inc. Transitioning to secure IP communications for encoding, encapsulating, and encrypting data
US7876998B2 (en) 2005-10-05 2011-01-25 Wall William E DVD playback over multi-room by copying to HDD
US8689016B2 (en) 2005-12-02 2014-04-01 Google Inc. Tamper prevention and detection for video provided over a network to a client
US8526612B2 (en) 2006-01-06 2013-09-03 Google Inc. Selective and persistent application level encryption for video provided to a client
US7769395B2 (en) 2006-06-20 2010-08-03 Seven Networks, Inc. Location-based operations and messaging
US8185921B2 (en) 2006-02-28 2012-05-22 Sony Corporation Parental control of displayed content using closed captioning
US7555464B2 (en) 2006-03-01 2009-06-30 Sony Corporation Multiple DRM management
US7515710B2 (en) 2006-03-14 2009-04-07 Divx, Inc. Federated digital rights management scheme including trusted systems
US8683601B2 (en) 2006-04-14 2014-03-25 Google Inc. Audio/video identification watermarking
US8325920B2 (en) * 2006-04-20 2012-12-04 Google Inc. Enabling transferable entitlements between networked devices
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
US7992175B2 (en) 2006-05-15 2011-08-02 The Directv Group, Inc. Methods and apparatus to provide content on demand in content broadcast 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
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
US20070286420A1 (en) * 2006-06-08 2007-12-13 Widevine Technologies, Inc. Encryption of video content to vod services and networked personal video recorders using unique key placements
CN101094057A (en) * 2006-06-20 2007-12-26 国际商业机器公司 Content dividing method, device and system
US9178693B2 (en) 2006-08-04 2015-11-03 The Directv Group, Inc. Distributed media-protection systems and methods to operate the same
US9225761B2 (en) 2006-08-04 2015-12-29 The Directv Group, Inc. Distributed media-aggregation systems and methods to operate the same
US8321677B2 (en) * 2006-09-21 2012-11-27 Google Inc. Pre-binding and tight binding of an on-line identity to a digital signature
US20080154775A1 (en) * 2006-12-22 2008-06-26 Nortel Networks Limited Re-encrypting encrypted content on a video-on-demand system
CN103561278B (en) 2007-01-05 2017-04-12 索尼克知识产权股份有限公司 Video distribution system including progressive playback
US20080201736A1 (en) * 2007-01-12 2008-08-21 Ictv, Inc. Using Triggers with Video for Interactive Content Identification
EP3145200A1 (en) 2007-01-12 2017-03-22 ActiveVideo Networks, Inc. Mpeg objects and systems and methods for using mpeg objects
US9826197B2 (en) 2007-01-12 2017-11-21 Activevideo Networks, Inc. Providing television broadcasts over a managed network and interactive content over an unmanaged network to a client device
EP1972994A1 (en) * 2007-03-20 2008-09-24 Seiko Epson Corporation Projector
US8621093B2 (en) * 2007-05-21 2013-12-31 Google Inc. Non-blocking of head end initiated revocation and delivery of entitlements non-addressable digital media network
US8693494B2 (en) 2007-06-01 2014-04-08 Seven Networks, Inc. Polling
US8805425B2 (en) 2007-06-01 2014-08-12 Seven Networks, Inc. Integrated messaging
US8243924B2 (en) 2007-06-29 2012-08-14 Google Inc. Progressive download or streaming of digital media securely through a localized container and communication protocol proxy
KR20090002939A (en) * 2007-07-05 2009-01-09 삼성전자주식회사 A method of transmitting and receiving video data in a digital broadcasting service and an apparatus thereof
WO2009065137A1 (en) 2007-11-16 2009-05-22 Divx, Inc. Hierarchical and reduced index structures for multimedia files
US20090132804A1 (en) * 2007-11-21 2009-05-21 Prabir Paul Secured live software migration
US8364181B2 (en) 2007-12-10 2013-01-29 Seven Networks, Inc. Electronic-mail filtering for mobile devices
US9002828B2 (en) 2007-12-13 2015-04-07 Seven Networks, Inc. Predictive content delivery
US8793305B2 (en) 2007-12-13 2014-07-29 Seven Networks, Inc. Content delivery to a mobile device from a content service
JP5050842B2 (en) * 2007-12-26 2012-10-17 沖電気工業株式会社 ENCRYPTION DEVICE, ENCRYPTION PROGRAM, DATA PROVIDING DEVICE, AND DATA PROVIDING SYSTEM
US8107921B2 (en) 2008-01-11 2012-01-31 Seven Networks, Inc. Mobile virtual network operator
US8862657B2 (en) 2008-01-25 2014-10-14 Seven Networks, Inc. Policy based content service
US20090193338A1 (en) 2008-01-28 2009-07-30 Trevor Fiatal Reducing network and battery consumption during content delivery and playback
US8868464B2 (en) 2008-02-07 2014-10-21 Google Inc. Preventing unauthorized modification or skipping of viewing of advertisements within content
US8787947B2 (en) 2008-06-18 2014-07-22 Seven Networks, Inc. Application discovery on mobile devices
EP2304953A4 (en) * 2008-06-25 2012-11-28 Activevideo Networks Inc Providing television broadcasts over a managed network and interactive content over an unmanaged network to a client device
US8078158B2 (en) 2008-06-26 2011-12-13 Seven Networks, Inc. Provisioning applications for a mobile device
US8515123B2 (en) * 2008-07-03 2013-08-20 Verimatrix, Inc. Efficient watermarking approaches of compressed media
US20100061709A1 (en) * 2008-09-05 2010-03-11 Davender Agnihotri Ad Menu for skipped advertisements
US8909759B2 (en) 2008-10-10 2014-12-09 Seven Networks, Inc. Bandwidth measurement
KR100992448B1 (en) * 2008-12-29 2010-11-05 주식회사 엑스크립트 Pcmcia scrambler, and sender and receiver for broadcasting using thereof
US8401188B1 (en) * 2009-10-30 2013-03-19 Adobe Systems Incorporated System and method for partial encryption of frame-based electronic content
EP2507995A4 (en) 2009-12-04 2014-07-09 Sonic Ip Inc Elementary bitstream cryptographic material transport systems and methods
US9043731B2 (en) 2010-03-30 2015-05-26 Seven Networks, Inc. 3D mobile user interface with configurable workspace management
US8838783B2 (en) 2010-07-26 2014-09-16 Seven Networks, Inc. Distributed caching for resource and mobile network traffic management
JP5676762B2 (en) 2010-07-26 2015-02-25 セブン ネットワークス インコーポレイテッド Mobile application traffic optimization
US9077630B2 (en) 2010-07-26 2015-07-07 Seven Networks, Inc. Distributed implementation of dynamic wireless traffic policy
US9043433B2 (en) 2010-07-26 2015-05-26 Seven Networks, Inc. Mobile network traffic coordination across multiple applications
KR20130138263A (en) 2010-10-14 2013-12-18 액티브비디오 네트웍스, 인코포레이티드 Streaming digital video between video devices using a cable television system
US8166164B1 (en) 2010-11-01 2012-04-24 Seven Networks, Inc. Application and network-based long poll request detection and cacheability assessment therefor
US8204953B2 (en) 2010-11-01 2012-06-19 Seven Networks, Inc. Distributed system for cache defeat detection and caching of content addressed by identifiers intended to defeat cache
US9330196B2 (en) 2010-11-01 2016-05-03 Seven Networks, Llc Wireless traffic management system cache optimization using http headers
WO2012060995A2 (en) 2010-11-01 2012-05-10 Michael Luna Distributed caching in a wireless network of content delivered for a mobile application over a long-held request
US8484314B2 (en) 2010-11-01 2013-07-09 Seven Networks, Inc. Distributed caching in a wireless network of content delivered for a mobile application over a long-held request
US9060032B2 (en) 2010-11-01 2015-06-16 Seven Networks, Inc. Selective data compression by a distributed traffic management system to reduce mobile data traffic and signaling traffic
WO2012061430A2 (en) 2010-11-01 2012-05-10 Michael Luna Distributed management of keep-alive message signaling for mobile network resource conservation and optimization
US8843153B2 (en) 2010-11-01 2014-09-23 Seven Networks, Inc. Mobile traffic categorization and policy for network use optimization while preserving user experience
WO2012060996A2 (en) 2010-11-01 2012-05-10 Michael Luna Caching adapted for mobile application behavior and network conditions
EP2636268B1 (en) 2010-11-22 2019-02-27 Seven Networks, LLC Optimization of resource polling intervals to satisfy mobile device requests
CN103404193B (en) 2010-11-22 2018-06-05 七网络有限责任公司 The connection that adjustment data transmission is established with the transmission being optimized for through wireless network
US8914534B2 (en) 2011-01-05 2014-12-16 Sonic Ip, Inc. Systems and methods for adaptive bitrate streaming of media stored in matroska container files using hypertext transfer protocol
EP2661697B1 (en) 2011-01-07 2018-11-21 Seven Networks, LLC System and method for reduction of mobile network traffic used for domain name system (dns) queries
EP2695388B1 (en) 2011-04-07 2017-06-07 ActiveVideo Networks, Inc. Reduction of latency in video distribution networks using adaptive bit rates
US9084105B2 (en) 2011-04-19 2015-07-14 Seven Networks, Inc. Device resources sharing for network resource conservation
EP2702500B1 (en) 2011-04-27 2017-07-19 Seven Networks, LLC Detecting and preserving state for satisfying application requests in a distributed proxy and cache system
EP2621144B1 (en) 2011-04-27 2014-06-25 Seven Networks, Inc. System and method for making requests on behalf of a mobile device based on atomic processes for mobile network traffic relief
US8812662B2 (en) 2011-06-29 2014-08-19 Sonic Ip, Inc. Systems and methods for estimating available bandwidth and performing initial stream selection when streaming content
US9239800B2 (en) 2011-07-27 2016-01-19 Seven Networks, Llc Automatic generation and distribution of policy information regarding malicious mobile traffic in a wireless network
US9467708B2 (en) 2011-08-30 2016-10-11 Sonic Ip, Inc. Selection of resolutions for seamless resolution switching of multimedia content
CN108989847B (en) 2011-08-30 2021-03-09 帝威视有限公司 System and method for encoding and streaming video
US8799647B2 (en) 2011-08-31 2014-08-05 Sonic Ip, Inc. Systems and methods for application identification
US8806188B2 (en) 2011-08-31 2014-08-12 Sonic Ip, Inc. Systems and methods for performing adaptive bitrate streaming using automatically generated top level index files
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
US8964977B2 (en) 2011-09-01 2015-02-24 Sonic Ip, Inc. Systems and methods for saving encoded media streamed using adaptive bitrate streaming
EP2761534B1 (en) 2011-09-28 2020-11-18 FotoNation Limited Systems for encoding light field image files
US8918503B2 (en) 2011-12-06 2014-12-23 Seven Networks, Inc. Optimization of mobile traffic directed to private networks and operator configurability thereof
WO2013086214A1 (en) 2011-12-06 2013-06-13 Seven Networks, Inc. A system of redundantly clustered machines to provide failover mechanisms for mobile traffic management and network resource conservation
EP2788889A4 (en) 2011-12-07 2015-08-12 Seven Networks Inc Flexible and dynamic integration schemas of a traffic management system with various network operators for network traffic alleviation
WO2013086447A1 (en) 2011-12-07 2013-06-13 Seven Networks, Inc. Radio-awareness of mobile device for sending server-side control signals using a wireless network optimized transport protocol
US8751800B1 (en) 2011-12-12 2014-06-10 Google Inc. DRM provider interoperability
US8861354B2 (en) 2011-12-14 2014-10-14 Seven Networks, Inc. Hierarchies and categories for management and deployment of policies for distributed wireless traffic optimization
WO2013090834A1 (en) 2011-12-14 2013-06-20 Seven Networks, Inc. Operation modes for mobile traffic optimization and concurrent management of optimized and non-optimized traffic
WO2013090212A1 (en) 2011-12-14 2013-06-20 Seven Networks, Inc. Mobile network reporting and usage analytics system and method using aggregation of data in a distributed traffic optimization system
EP2801236A4 (en) 2012-01-05 2015-10-21 Seven Networks Inc Detection and management of user interactions with foreground applications on a mobile device in distributed caching
US20130179199A1 (en) 2012-01-06 2013-07-11 Rovi Corp. Systems and methods for granting access to digital content using electronic tickets and ticket tokens
US10409445B2 (en) 2012-01-09 2019-09-10 Activevideo Networks, Inc. Rendering of an interactive lean-backward user interface on a television
US9203864B2 (en) 2012-02-02 2015-12-01 Seven Networks, Llc Dynamic categorization of applications for network access in a mobile network
WO2013116852A1 (en) 2012-02-03 2013-08-08 Seven Networks, Inc. User as an end point for profiling and optimizing the delivery of content and data in a wireless network
US8812695B2 (en) 2012-04-09 2014-08-19 Seven Networks, Inc. Method and system for management of a virtual network connection without heartbeat messages
WO2013155208A1 (en) 2012-04-10 2013-10-17 Seven Networks, Inc. Intelligent customer service/call center services enhanced using real-time and historical mobile application and traffic-related statistics collected by a distributed caching system in a mobile network
US9123084B2 (en) 2012-04-12 2015-09-01 Activevideo Networks, Inc. Graphical application integration with MPEG objects
WO2014011216A1 (en) 2012-07-13 2014-01-16 Seven Networks, Inc. Dynamic bandwidth adjustment for browsing or streaming activity in a wireless network based on prediction of user behavior when interacting with mobile applications
US9936267B2 (en) 2012-08-31 2018-04-03 Divx Cf Holdings Llc System and method for decreasing an initial buffering period of an adaptive streaming system
US9161258B2 (en) 2012-10-24 2015-10-13 Seven Networks, Llc Optimized and selective management of policy deployment to mobile clients in a congested network to prevent further aggravation of network congestion
US9307493B2 (en) 2012-12-20 2016-04-05 Seven Networks, Llc Systems and methods for application management of mobile device radio state promotion and demotion
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
US9241314B2 (en) 2013-01-23 2016-01-19 Seven Networks, Llc Mobile device with application or context aware fast dormancy
US8874761B2 (en) 2013-01-25 2014-10-28 Seven Networks, Inc. Signaling optimization in a wireless network for traffic utilizing proprietary and non-proprietary protocols
US9326185B2 (en) 2013-03-11 2016-04-26 Seven Networks, Llc Mobile network congestion recognition for optimization of mobile traffic
WO2014145921A1 (en) 2013-03-15 2014-09-18 Activevideo Networks, Inc. A multiple-mode system and method for providing user selectable video content
US9906785B2 (en) 2013-03-15 2018-02-27 Sonic Ip, Inc. Systems, methods, and media for transcoding video data according to encoding parameters indicated by received metadata
US10397292B2 (en) 2013-03-15 2019-08-27 Divx, Llc Systems, methods, and media for 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
US9100687B2 (en) 2013-05-31 2015-08-04 Sonic Ip, Inc. Playback synchronization across playback devices
US9380099B2 (en) 2013-05-31 2016-06-28 Sonic Ip, Inc. Synchronizing multiple over the top streaming clients
US9326047B2 (en) 2013-06-06 2016-04-26 Activevideo Networks, Inc. Overlay rendering of user interface onto source video
US9294785B2 (en) 2013-06-06 2016-03-22 Activevideo Networks, Inc. System and method for exploiting scene graph information in construction of an encoded video sequence
US9219922B2 (en) 2013-06-06 2015-12-22 Activevideo Networks, Inc. System and method for exploiting scene graph information in construction of an encoded video sequence
US9065765B2 (en) 2013-07-22 2015-06-23 Seven Networks, Inc. Proxy server associated with a mobile carrier for enhancing mobile traffic management in a mobile network
US9386067B2 (en) 2013-12-30 2016-07-05 Sonic Ip, Inc. Systems and methods for playing adaptive bitrate streaming content by multicast
US10032479B2 (en) * 2014-01-31 2018-07-24 Nbcuniversal Media, Llc Fingerprint-defined segment-based content delivery
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
WO2016022979A1 (en) 2014-08-07 2016-02-11 Sonic IP. Inc. Systems and methods for protecting elementary bitstreams incorporating independently encoded tiles
US9697630B2 (en) 2014-10-01 2017-07-04 Sony Corporation Sign language window using picture-in-picture
EP3910904A1 (en) 2015-01-06 2021-11-17 DivX, LLC Systems and methods for encoding and sharing content between devices
SG11201706160UA (en) 2015-02-27 2017-09-28 Sonic Ip Inc Systems and methods for frame duplication and frame extension in live video encoding and streaming
US10075292B2 (en) 2016-03-30 2018-09-11 Divx, Llc Systems and methods for quick start-up of playback
US10231001B2 (en) 2016-05-24 2019-03-12 Divx, Llc Systems and methods for providing audio content during trick-play playback
US10129574B2 (en) 2016-05-24 2018-11-13 Divx, Llc Systems and methods for providing variable speeds in a trick-play mode
US10148989B2 (en) 2016-06-15 2018-12-04 Divx, Llc Systems and methods for encoding video content
US10498795B2 (en) 2017-02-17 2019-12-03 Divx, Llc Systems and methods for adaptive switching between multiple content delivery networks during adaptive bitrate streaming
US10469379B2 (en) * 2017-02-17 2019-11-05 Cisco Technology, Inc. System and method to facilitate content delivery to multiple recipients in a network environment
US10404592B2 (en) 2017-03-24 2019-09-03 Cisco Technology, Inc. System and method to facilitate content forwarding using bit index explicit replication (BIER) in an information-centric networking (ICN) environment
WO2018208997A1 (en) 2017-05-09 2018-11-15 Verimatrix, Inc. Systems and methods of preparing multiple video streams for assembly with digital watermarking
CA3134561A1 (en) 2019-03-21 2020-09-24 Divx, Llc Systems and methods for multimedia swarms
US11778251B2 (en) * 2020-06-11 2023-10-03 Arris Enterprises Llc Selective MPEG packet encryption and decryption based upon data and security priorities

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5420866A (en) * 1994-03-29 1995-05-30 Scientific-Atlanta, Inc. Methods for providing conditional access information to decoders in a packet-based multiplexed communications system
US5666487A (en) * 1995-06-28 1997-09-09 Bell Atlantic Network Services, Inc. Network providing signals of different formats to a user by multplexing compressed broadband data with data of a different format into MPEG encoded data stream
US5721778A (en) * 1994-10-28 1998-02-24 Sony Corporation Digital signal transmitting method, digital signal receiving apparatus, and recording medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5420866A (en) * 1994-03-29 1995-05-30 Scientific-Atlanta, Inc. Methods for providing conditional access information to decoders in a packet-based multiplexed communications system
US5721778A (en) * 1994-10-28 1998-02-24 Sony Corporation Digital signal transmitting method, digital signal receiving apparatus, and recording medium
US5666487A (en) * 1995-06-28 1997-09-09 Bell Atlantic Network Services, Inc. Network providing signals of different formats to a user by multplexing compressed broadband data with data of a different format into MPEG encoded data stream

Also Published As

Publication number Publication date
AU4330400A (en) 2000-10-23
GB2363278B (en) 2003-08-06
WO2000060846A2 (en) 2000-10-12
GB2363278A (en) 2001-12-12
CA2369118C (en) 2009-10-20
GB0123375D0 (en) 2001-11-21
CA2369118A1 (en) 2000-10-12
US6415031B1 (en) 2002-07-02

Similar Documents

Publication Publication Date Title
WO2000060846A3 (en) Selective and renewable encryption for secure distribution of video on-demand
US7260215B2 (en) Method for encryption in an un-trusted environment
CA2487057A1 (en) Apparatus for entitling remote client devices
WO2002080444A3 (en) Method and apparatus for streaming data using rotating cryptographic keys
AU770370B2 (en) Secure control of security mode
EP0343805A3 (en) Reproduction of secure keys by using distributed key generation data
MY119594A (en) Method and apparatus for secure communication of information between a plurality of digital audiovisual devices
CA2278670A1 (en) Encryption and decryption method and apparatus
WO1998002989B1 (en) Cryptographic communication system
WO2002047356A3 (en) Method of secure transmission of digital data from a source to a receiver
EP1051036A3 (en) Cryptographic method and apparatus for restricting access to transmitted programming content using hash functions and program identifiers
WO2004012378A3 (en) Digital content security system and method
HK1011590A1 (en) System and method for general purpose network analysis.
WO1997041661A3 (en) Use of an encryption server for encrypting messages
AU2506397A (en) Method for providing a secure communication between two devices and application of this method
US8176331B2 (en) Method to secure data exchange between a multimedia processing unit and a security module
WO2002033881A3 (en) Fast escrow delivery
WO2001078491A3 (en) Systems and methods for encrypting/decrypting data using a broker agent
JP2005245010A5 (en)
KR20080014929A (en) System and method for using drm to control conditional access to broadband digital content
JPH09130374A (en) Encipherment system
WO2002041101A3 (en) Method and system for transmitting data with enhanced security that conforms to a network protocol
EP0786881A3 (en) Method and system for synchronisation of encryption/decryption keys in a data communications network using marker packets
WO2003019899A3 (en) Local digital network, methods for installing new devices and data broadcast and reception methods in such a network
WO2000018060A3 (en) A secure data transfer system

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

ENP Entry into the national phase

Ref country code: GB

Ref document number: 200123375

Kind code of ref document: A

Format of ref document f/p: F

ENP Entry into the national phase

Ref document number: 2369118

Country of ref document: CA

Ref country code: CA

Ref document number: 2369118

Kind code of ref document: A

Format of ref document f/p: F

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP