JP2014029545A - デジタルコンテンツの部分的暗号化のための方法および装置 - Google Patents
デジタルコンテンツの部分的暗号化のための方法および装置 Download PDFInfo
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- JP2014029545A JP2014029545A JP2013194157A JP2013194157A JP2014029545A JP 2014029545 A JP2014029545 A JP 2014029545A JP 2013194157 A JP2013194157 A JP 2013194157A JP 2013194157 A JP2013194157 A JP 2013194157A JP 2014029545 A JP2014029545 A JP 2014029545A
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- 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
- H04N21/26613—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 keys in general
-
- 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
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4126—The peripheral being portable, e.g. PDAs or mobile phones
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- 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
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
-
- 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
- H04N21/44055—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 by partially decrypting, e.g. decrypting a video stream that has been partially encrypted
-
- 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
- H04N21/4627—Rights management associated to the content
-
- 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
- H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
-
- 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
- H04N21/8355—Generation of protective data, e.g. certificates involving usage data, e.g. number of copies or viewings allowed
-
- 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)
- Databases & Information Systems (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Engineering & Computer Science (AREA)
- Storage Device Security (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
【解決手段】ブロードキャスト・コンテンツは部分的に暗号化される。暗号化された部分のコンテンツの割合が画像ヘッダーに保存され、送り先プラットフォームの計算能力によって変化する。さらに暗号化される当該画像のコンテンツについてチェックサムが計算され、チェックサムは鍵により署名され、ヘッダーに保存される。この署名によりデータの完全性が保証される。
【選択図】図6
Description
PRS((高度)一般パケットラジオサービス)などの第三世代通信基準を実行する端末で、電話リンクのデータ・チャンネルを通して接続ができる。当該接続は、例えばWiFiとして知られる技術であるプロトコル・ファミリー802.11などの、電話接続に依存しない通信手段によっても可能である。この場合、言うまでもなく、大量のデータのダウンロードが実行可能である限り、当該端末と当該サーバー間でいかなる通信技術でも使用できる。
Claims (10)
- 画像(90)として言及される検索可能な単位に分割されるデジタルコンテンツを暗号化する方法であって、それぞれの画像はヘッダー(91)とビデオデータ部分(92)から成り、少なくとも一部の画像については、
対称鍵によって暗号化された第一の部分(93)と第二の暗号化されない部分(94)という二つの部分にビデオデータ部分(92)を分ける工程であって、第一の暗号化された部分(93)のサイズが画像(90)のビデオデータ部分(92)の特定の割合を占め、当該暗号化されたコンテンツの割合が当該画像のヘッダーに保存され、送り先プラットフォームの計算能力によって変化する工程、
から成ることを特徴とする方法。 - この割合がそれぞれの暗号化された画像について同一であることを特徴とする請求項1に記載の暗号化の方法。
- 画像に幾つかの種類があり、特定種類の画像のビデオデータ部分のみが暗号化されることを特徴とする請求項1に記載の暗号化の方法。
- それぞれの画像のコンテンツが圧縮され、当該画像の様々な種類が当該画像圧縮モードによって定義され、第一の種類の画像は本質的に圧縮され、他の一つまたは複数の種類の画像は当該第一の種類の少なくとも一部分の画像を用いて圧縮され、当該第一の種類の画像のコンテンツのみが暗号化されることを特徴とする請求項3に記載の暗号化の方法。
- 少なくとも当該ビデオデータ部分が暗号化される当該画像のコンテンツについてチェックサムが計算され、このチェックサムは鍵によって署名され、前記画像のヘッダーに導入されることを特徴とする請求項1乃至4に記載の暗号化の方法。
- 当該暗号化されたビデオデータ部分の割合が当該暗号化された画像のヘッダーに保存されることを特徴とする請求項2乃至5に記載の暗号化の方法。
- 画像として言及される検索可能な単位に分割されるデジタルコンテンツであって、それぞれの画像がヘッダーとコンテンツから成り、請求項1乃至6の一つで特許請求された方法の一つに従い暗号化されることを特徴とするデジタルコンテンツ。
- 請求項1乃至6の一つで特許請求された方法の一つに従い暗号化されるデジタルコンテンツを解読する方法。
- 請求項1乃至6の一つで特許請求された方法の一つに従い暗号化されるデジタルコンテンツを解読する手段から成ることを特徴とする、デジタルコンテンツを検索するための端末。
- 請求項1乃至6の一つで特許請求された方法の一つに従いデジタルコンテンツを暗号化する手段から成ることを特徴とする、デジタルコンテンツを暗号化するための装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0705838A FR2920067B1 (fr) | 2007-08-13 | 2007-08-13 | Procede et dispositif de chiffrement partiel d'un contenu numerique |
FR07/05838 | 2007-08-13 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2010520561A Division JP2010536298A (ja) | 2007-08-13 | 2008-08-12 | デジタルコンテンツの部分的暗号化のための方法及び装置 |
Publications (2)
Publication Number | Publication Date |
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JP2014029545A true JP2014029545A (ja) | 2014-02-13 |
JP5626816B2 JP5626816B2 (ja) | 2014-11-19 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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JP2010520561A Pending JP2010536298A (ja) | 2007-08-13 | 2008-08-12 | デジタルコンテンツの部分的暗号化のための方法及び装置 |
JP2013194157A Active JP5626816B2 (ja) | 2007-08-13 | 2013-09-19 | デジタルコンテンツの部分的暗号化のための方法および装置 |
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JP2010520561A Pending JP2010536298A (ja) | 2007-08-13 | 2008-08-12 | デジタルコンテンツの部分的暗号化のための方法及び装置 |
Country Status (5)
Country | Link |
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US (1) | US8804956B2 (ja) |
EP (1) | EP2177025B1 (ja) |
JP (2) | JP2010536298A (ja) |
FR (1) | FR2920067B1 (ja) |
WO (1) | WO2009021953A1 (ja) |
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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 |
US9191457B2 (en) | 2012-12-31 | 2015-11-17 | Sonic Ip, Inc. | Systems, methods, and media for controlling delivery of content |
JP6000164B2 (ja) * | 2013-02-28 | 2016-09-28 | 株式会社日立製作所 | 部分暗号による通信保護システム及び方法、及び記憶媒体 |
EP2974283B1 (en) * | 2013-03-15 | 2021-11-10 | Videri Inc. | Systems and methods for displaying, distributing, viewing and controlling digital art and imaging |
JP6976682B2 (ja) | 2013-03-15 | 2021-12-08 | ビデリ、インコーポレイテッドVideri Inc. | デジタル・アートを表示、配信、鑑賞および制御し、画像形成するためのシステムおよび方法 |
GB2533279B (en) * | 2014-12-08 | 2019-08-14 | Gurulogic Microsystems Oy | Secure media player |
US10225298B2 (en) | 2015-01-06 | 2019-03-05 | Divx, Llc | Systems and methods for encoding and sharing content between devices |
US9596235B2 (en) | 2015-03-30 | 2017-03-14 | Microsoft Technology Licensing, Llc | Power efficient storage management |
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2007
- 2007-08-13 FR FR0705838A patent/FR2920067B1/fr active Active
-
2008
- 2008-08-12 US US12/673,610 patent/US8804956B2/en active Active
- 2008-08-12 JP JP2010520561A patent/JP2010536298A/ja active Pending
- 2008-08-12 EP EP08787147.1A patent/EP2177025B1/fr active Active
- 2008-08-12 WO PCT/EP2008/060594 patent/WO2009021953A1/fr active Application Filing
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Also Published As
Publication number | Publication date |
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JP2010536298A (ja) | 2010-11-25 |
US8804956B2 (en) | 2014-08-12 |
US20110044452A1 (en) | 2011-02-24 |
FR2920067B1 (fr) | 2014-11-28 |
FR2920067A1 (fr) | 2009-02-20 |
EP2177025A1 (fr) | 2010-04-21 |
EP2177025B1 (fr) | 2021-11-10 |
WO2009021953A1 (fr) | 2009-02-19 |
JP5626816B2 (ja) | 2014-11-19 |
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