TW200425082A - Method for managing copy protection information of recording medium - Google Patents

Method for managing copy protection information of recording medium Download PDF

Info

Publication number
TW200425082A
TW200425082A TW093111656A TW93111656A TW200425082A TW 200425082 A TW200425082 A TW 200425082A TW 093111656 A TW093111656 A TW 093111656A TW 93111656 A TW93111656 A TW 93111656A TW 200425082 A TW200425082 A TW 200425082A
Authority
TW
Taiwan
Prior art keywords
information
data
recording medium
rights management
property rights
Prior art date
Application number
TW093111656A
Other languages
English (en)
Inventor
Byung-Jin Kim
Hyung-Sun Kim
Alexandre Stechkine
Original Assignee
Lg Electronics Inc
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 Lg Electronics Inc filed Critical Lg Electronics Inc
Publication of TW200425082A publication Critical patent/TW200425082A/zh

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00297—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored in a management area, e.g. the video manager [VMG] of a DVD
    • G11B20/00304—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored in a management area, e.g. the video manager [VMG] of a DVD the key being stored in the lead-in area [LIA]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00326—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being embossed on the record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00333—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored in header data, e.g. in sector headers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00369—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier wherein a first key, which is usually stored on a hidden channel, e.g. in the lead-in of a BD-R, unlocks a key locker containing a second
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00253—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
    • G11B20/00405—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored by varying characteristics of the recording track, e.g. by altering the track pitch or by modulating the wobble track
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00485—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier
    • G11B20/00492—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier wherein content or user data is encrypted
    • G11B20/00514—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier characterised by a specific kind of data which is encrypted and recorded on and/or reproduced from the record carrier wherein content or user data is encrypted wherein the entire content is encrypted with the same key, e.g. disc key or master key
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/00746—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number
    • G11B20/00753—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/0084—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific time or date
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00855—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a step of exchanging information with a remote server
    • G11B20/00869—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a step of exchanging information with a remote server wherein the remote server can deliver the content to a receiving device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44204—Monitoring of content usage, e.g. the number of times a movie has been viewed, copied or the amount which has been watched
    • 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]
    • H04N21/80—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
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/84—Television signal recording using optical recording
    • H04N5/85—Television signal recording using optical recording on discs or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/10537—Audio or video recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2541—Blu-ray discs; Blue laser DVR discs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Storage Device Security (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Description

200425082 玖、發明說明： 【發明所屬之技術領域】 本發明係有關於管理記錄媒體防拷貝保護資訊的方 法，更明確地說，有關於一種改良解密A/V資料的防拷貝 保護資訊之安全性的方法，該A/V資料係被加密記錄於光 碟，例如可寫一次光碟或可重寫式光碟的資料區中。 【先前技術】 一般而言，能記錄數位影像或聲音資料之例如CD或 DVD的光碟已經被大量使用並商品化，並且，當例如BD 之高密度光碟的標準化快速進行時，相關產品也期待於不 久將來加以商品化。 為了防止記錄於此一光碟中之數位影像或聲音資料的 非法或未授權複製，已經提出一防拷貝保護資訊之管理方 法，其中，一使用防拷貝保護資訊加密之A/V資料被記錄 於一光碟之資料區’以及’該防拷貝保護資訊係被記錄及 管理於一特定區，例如，光碟之引入區。此方法係被詳述 如下。 第1圖為一光碟機200及應用體300之架構方塊圖， 其中使用了 DVD之管理防拷貝保護資訊的方法。如第1 圖所示，光碟機200可以包含一驗證方塊20、一鑰匙共用 方塊21、及加密方塊22及23。 例如個人電腦（PC)之應用體 3 00可以包含驗證方塊 30、一鑰匙共用方塊31、解密方塊32及33、一解擾器方 3 200425082 塊34、一解壓縮方塊38、一說明碟鑰匙36、及一說明標 題鑰37。 一驗證控制鑰、一安全碟鑰、一加密標題鑰、及一擾 頻A/V資料可以儲存於予以插入光碟機200之DVD100中。 光碟機200之驗證方塊2〇使用自DVD100讀出之驗證 控制鑰，來執行用以資料傳送及接收進出應用體3 00之驗 證方塊30之連串驗證處理。使用由鑰匙共用方塊21所提 供之預定加密餘’該加密方塊22及23再加密由DVD 100 所讀取之一安全碟鑰及加密標題鑰成為適用以傳輸及接收 之資料’然後’傳送該再加密之資料。 使用由鑰共用方塊31所提供之預定說明鑰，應用體 300之解密方塊32及33執行一連串之操作，以解密由光 碟機200接收之一安全碟鑰及一加密標題鑰。 光碟錄使用管理於應用體300中之主鑰35來解密，及 標題鑰使用已解密碟鑰來解密。解擾器方塊34使用標題 鑰，以解擾由DVD 100所讀取之擾頻A/V資料。解壓縮方 塊38解壓縮已解擾A/V資料，以輸出原始A/V資料。此 處理不可能防止被擾頻及記錄於DVD 1〇〇中之聲音或影像 資料的内容被未授權及非法複製。 然而，例如被記錄於DVD中之安全碟鍮及加密標題綸 的防拷貝保護資訊可能為例如駭客之第三者所非法入侵及 散佈，因而，允許DVD資料區中之加密記錄之A/V資料 被非法複製。因此，立即需要提供有效解決方案，以足夠 加強防拷貝保護資訊的安全性，更明確地說，係提供一種 4 200425082 有效解決方案，以防止在網際網路上傳艾之内容的非 製。 【發明内容】 因此，本發明係針對上述問題，本發明之目的為 一種管理記錄媒體的防拷貝保護資訊的方法與設備， 大地強化防拷貝保護資訊的安全性。 本發明之另一目的為提供一種方法與設備，用以 記錄媒體的防拷貝保護資訊，其可以有效地防止例如 際網路上傳送之内容的非法複製。 本發明之另一目的為提供一種方法與設備，用以 記錄媒體的防拷貝保護資訊，其可以控制一光碟的播 拷貝操作，光碟中記錄有含數位財產權管理資訊之内 依據本發明，上述目的可以藉由提供一記錄媒體 理防拷貝保護資訊的方法加以完成，該方法包含··基 錄於一記錄媒體的第一特定區之防拷貝保護資訊，來 一資料串流並記錄該已加密資料串流於記錄媒體的資 中；及記錄用於第一特定區中之資料串流之數位財產 資訊。 依據本發明另一態樣，其中提供一種管理一記錄 的防拷貝保護資訊的方法，該方法包含步驟：a)確認 於記錄媒體的第一特定區中之數位財產權管理資訊； 據該所確認之數位財產權管理資訊，解密記錄於第一 區中之該防拷貝保護資訊；及c)使用該被解密之防拷 法複 提供 其大 管理 在網 管理 放及 容。 的管 於記 加密 料區 管理 媒體 記錄 b)依 特定 貝保 200425082 護資訊，來解密出加密記錄於記錄媒體之資料區中之資料 串流。 依據本發明之另一態樣，提供一記錄媒體，其包含： 一資料區，其中記錄有使用防拷貝保護資訊加密之資料串 流；及一第一特定區，其中記錄有該防拷貝保護資料及該 資料串流之數位財產權管理資訊。 依據本發明另一態樣，提供有一用以記錄資料於一記 錄媒體及重製於記錄媒體中之資料的設備，其包含：一拾 取單元，用以記錄資料於記錄媒體或由該記錄媒體讀取資 料；一防拷貝保護資訊計算單元，用以解密被加密記錄於 記錄媒體的一第一特定區中之防拷貝保護資訊；一資料處 理單元，用以使用該防拷貝保護資訊，來解密由記錄媒體 所讀出之資料或加密予以記錄於該記錄媒體中之資料；及 一數位財產權管理資訊模組，用以分析及更新該資料之數 位財產權管理資訊，及基於該數位財產權管理資訊，控制 該防拷貝保護資訊的解密，其中使用該防拷貝保護資訊加 密之資料串流係被記錄於該記錄媒體的資料區_，及該資 料串流之數位財產權管理資訊係被記錄於第一特定區中。 本發明之上述及其他目的與特性及優點將參考以下之 詳細說明，配合上附圖加以清楚了解。 【實施方式】 依據本發明之管理記錄媒體的防拷貝保護資訊之較佳 實施例將參考附圖加以詳細說明。 6 200425082 第2圖為一光碟機500之架構的方塊圖，其中應用了 依據本發明之管理記錄媒體的防拷貝保護資訊的方法。如 於此圖所示，光碟機500可以包含一解密方塊5〇及一鑰計 算方塊51、及一 DRM(數位財產權管理）模組52。 防拷貝保護資訊（例如一加密碟鑰）及由内容所提供者 :資訊係被記錄於提供在光碟400中之鑰匙櫃中、， 以先碟400係予以被插入在光碟機5〇〇中。另外，一用以 讀：及解密該碟鑰…資訊之隱藏碼係被記錄在光碟 4U〇之一特定區域中。 該隱藏碼係以擺動預坑形式（擺動預坑型）或以具有低 成份之實體擺動形式記錄於光碟4〇。之特定區中，例如 被记錄於光碟400之引入區的 預錄（壓化）&中，使得其不 -使用-位元對位元拷貝法加以非法複製。 該DRM資訊為管理資 ^ ^ 400 ^ ^ 41 〇 ，、被用以控制被加密記錄 於九碟400之資料區中之資 如，DRM資訊係為管理資訊：：播放或拷貝操作。例 有效週期或期限)、拷貝-欠數。…允許播放時間(例如， 止，立中之提#久# 、— 複製限制）及拷貝允許/禁 定，以防止資料標的非法複製“4棺之内容提供者選擇設 如第3圖所示，該光碟機 含-则檢測單元(未標號—之餘叶异方塊“可以包 檢測單元檢測使用隱藏 —解密單元(未標號)。咖 及解密單元，解密使用隱藏^於输匙植中之咖資訊， 焉而§己錄於鑰匙櫃中之碟鑰。 該解…基於為DRM檢測單元所檢測之〇謂資訊來 200425082 。例如，若設定於DRM資 限）已經到期，則解 選擇地執行解密該碟鑰之操作。例如 Λ中之允許播放時間（例如有效期或期 密單元並不會執行解密該碟鑰的操作。 參考為DRM檢測單元所檢測之DRM資訊，DRM模組 5 2控制鑰計算方螝51之操作或控制於連接至光碟機5 〇 〇 之應用體（例如一個人電腦）中之資料的重製或拷貝操 作。 如第4圖所示，光碟機500可以經由一安全驗證通道 (SAC)70與應用體600(例如個人電腦）一起使用接收及發 射資料。應用體600包含一 A/V解碼器6〇,用以解碼經由 安全驗證通道70接收之A/V資料。 DRM模組52也可以不是提供在光碟機5〇〇中，而是 在應用體600中。於此時，提供在應用體6〇〇中之DRM 模組61由鑰計算方塊51之DRM檢測單元經由安全驗證 通道70接收DRM資訊，並儲存所接收之DRM資訊。在 接收及儲存DRM資訊後，DRM模組61控制A/v解碼器 6 1之解碼操作或經由安全驗證通道7〇控制鑰計算方塊$ 1 之操作，以防止被加密記錄於光碟資料區中 1心貧枓串流被 非法地複製或被無限制次地重製。 如第5圖所示，一 A/V解碼器57可 J Μ不只提供於應 用體600中，也可以提供於光碟機5〇〇中。 於此時，因為 光碟機500經由安全驗證通道7〇輸出完全 給應用體600，所以，相較於第 料的位元串流被直接傳送至應用$ 鮮碼聲音及影像
8 200425082 以降低防拷貝保護資訊被入侵的危險。 如上所述，光碟中，碟鑰及DRM資訊被一起儲存於 其鑰匙櫃中及隱藏碼被記錄於其特定區中，光碟可以為可 寫入一次光碟或可重寫光碟。 如第6圖所示，在網際網路上所提供之各種内容的資 料檔的標頭可以包含一拷貝旗標（c〇py — Flag)，用以設定= 否允許拷貝、設定拷貝次數的資訊、及設定允許播放時間 的播放時間資訊。 光碟機500記錄經由網際網路接收之資料檔（資料柃 、#2、.··）於光碟之資料區中，並同時記錄包含於所接^ 資料檔（資料檔#1、#2、…）之個別標頭中之多數Drm資仅 (DRM#1、#2、…）於光碟之鍮匙櫃中，同時，依據資料梓 分割多數DRM資訊。 田 當光碟被製造時，防拷貝保護資訊及隱藏碼係被事先 記錄於光碟中，及在使用防拷貝保護資訊加密後， 被§己錄於光碟之資料區中。例如，包含於鑰匙櫃等 之碟 鑰也可以記錄於光碟之引入區中，呈擺動之預坑（擺動預ρ 型式）型式或呈具低頻成份的實體擺動，如同隱藏鑰般。2 此’ DRM資訊被以坑的形式，沿著可記錄或可重寫區中 擺動軌跡，被記錄於鑰匙櫃中。另一方面，當播放及拷 光碟時，光碟機500更新記錄於光碟之鑰匙櫃中 ^ r ^ drm >訊。 對於被以上述方式更新及記錄資料檔與DRM資气 光碟’光碟機500可以依據DRM資訊，執行限制性 之播 9 2UU425082 放及拷貝操作。 或被無限制地重製記錄於光碟中之資料槽被非法複製 可以由以上說明了解， 保護資訊的安全性。 了 大大地改良防拷貝 本發明也可 製。 防止傳送在網際網路上之内容被非法複 本發明也可 控制包含有數位財產權管理m 眘 訊之内容的重㈣。 里（麵）貝 雖然本發明之4 熟習於本技蓺者實施例已經例示目的加以揭示’但 圍所揭示之範圍與精神：可！Γ不脫離本發明申請專利範 砷下’元成各種修改、添加及替換。 【圖式簡單說明】 第1圖為一光碟機及應用體之架構方塊圖，其中應用 D之防拷貝保護資訊的管理方法； 第2及3圖或—、“
-’、、、一光碟機的架構方塊圖，其中應用了依 據本發明一實施你 之冗錄媒體的防拷貝保護資訊的管理方 法； 第4及5圖為一 應用了依據本發明另 訊的管理方法。；及 光碟機及應用體的架構方塊圖，其中 一實施例之記錄媒體的防拷貝保護資 明一實施例中，媒體記錄之防拷貝 位財產權管理資訊如何管理的示意 第6圖為依據本發 保護訊管理方法中，數 圖。 10 200425082 【主要元件符號說明】 20 驗證方塊 21 鑰匙共用方塊 22 驗證方塊 23 驗證方塊 30 驗證方塊 3 1 鑰匙共用方塊 32 解密方塊 33 解密方塊 34 解擾器方塊 36 說明碟鑰 37 說明標題鑰 38 解壓縮方塊 50 解密方塊 51 鑰計算方塊 52 DRM模組 57 A/V解碼器 60 A/V解碼器 61 DRM模組 70 安全驗證通道 100 DVD 200 光碟機 300 應用體 400 光碟 500 光碟機 600 應用體 11

Claims (1)

  1. 200425082 拾、申請專利範圍： 1. 一種管理一記錄媒體的防拷貝保護資訊的方法，該 方法至少包含步驟： 依據記錄於一記錄媒體的第一特定區中之防拷貝保護 資訊，加密一資料串流，以及將該已加密之資料串流記錄 於該記錄媒體的一資料區；及 記錄用於該資料串流之數位財產權管理資訊於該第一 特定區中。 2·如申請專利範圍第1項所述之方法，其中上述之記 錄媒體為一只可寫一次光碟或可重寫光碟。 3 .如申請專利範圍第1項所述之方法’其中上述之數 位財產權管理資訊被用以控制該資料串流之拷貝或播放。 4. 如申請專利範圍第3項所述之方法，其中上述之數 位財產權管理資訊包含該資料串流之允許播放時間、其拷 貝次數、及是否允許拷貝的資訊。 5. 如申請專利範圍第1項所述之方法，其中上述之資 料串流係為由網路接收之資料檔。 6. 如申請專利範圍第5項所述之方法，其中上述之數 位財產權管理資訊係由資料檔之標頭資訊讀出。 12 200425082 7. 如申請專利範圍第5項所述之方法，其中上述之數 位財產權管理資訊係在依據資料檔分割時被記錄。 8. 如申請專利範圍第1項所述之方法，其中一用以解 密該防拷貝保護資訊及該數位財產權管理資訊之隱藏碼係 記錄於該記錄媒體的一第二特定區中。 9. 如申請專利範圍第8項所述之方法，其中該隱藏碼 以具有低頻成份之擺動的形式被記錄，其係不能使用位元 對位元拷貝加以複製。 1 0. —種管理一記錄媒體的防拷貝保護資訊的方法，該 方法至少包含步驟： a) 確認一記錄在記錄媒體之第一特定區中之數位財產 權管理資訊；及 b) 依據所確認之數位財產權管理資訊，來解密被記錄 於該第一特定區中之防拷貝保護資訊；及 c) 使用該已解密防拷貝保護資訊，解密一資料串流， 其係被加密及記錄於該記錄媒體之資料區中。 1 1 .如申請專利範圍第1 0項所述之方法，其中上述之 數位財產權管理資訊係被用以控制該資料串流之拷貝或播 放0 13 200425082 12.如申請專利範圍第n項所述之方法，其中上述之 數位財產權管理資訊係依據對應於該資料串流之資料檔被 分割時加以管理。 13·如申請專利範圍第12項所述之方法，其中上述之 防拷貝保護資訊係只有在資料 貝時，才會被解密，該資訊係 權管理資訊中，滿足該資料檔 1 4 ·如申請專利範圍第j 2 資料檐之播放或拷貝被執行， 貝之資訊，其係被包含在該資 中’及記錄該更新資訊於該第 覆寫。 槽案的資訊予以被重製或拷 被包含該所確認之數位財產 之播放或拷貝條件。 項所述之方法，更包含若一 則更新有關所執行播放或拷 料^之數位財產權管理資訊 特定區中，以該更新資訊 M 1建之方法，其中上述 防拷貝保護資訊及數位財產權管理 貝吼係使用一記錄於 錄媒體的一第二特定區中之障藏 、 丨急臧馬加以解密，該隱藏碼 以具有低頻成份之擺動的形式加 .^ 圮錄，其係不能使用 7L對位元拷貝加以複製。 16.一種記錄媒體，其至少包含： 一資料區，其中記錄有使用防 密 々界貝保護資訊加以加 14 200425082 之資料串流； 一第一特定區，其中記錄有該防拷貝保護資訊及該資 料串流之數位財產權管理資訊。 1 7.如申請專利範圍第1 6項所述之記錄媒體，其中上 述之記錄媒體係為只寫一次光碟或可重寫光碟。 1 8 .如申請專利範圍第1 6項所述之記錄媒體，其中上 述之數位財產權管理資訊係用以控制該資料串流之拷貝或 播放。 1 9.如申請專利範圍第1 6項所述之記錄媒體，其中上 述之數位財產權管理資訊係依據對應於資料串流之資料檔 被分割時加以記錄。 20.如申請專利範圍第16項所述之記錄媒體，更包含 一第二特定區，其中記錄有用於解密該防拷貝保護資訊及 數位財產權管理資訊之隱藏碼。 2 1 .如申請專利範圍第20項所述之記錄媒體，其中上 述之防拷貝保護資訊及隱藏碼係當製造記錄媒體時加以記 錄於該記錄媒體。 2 2.如申請專利範圍第20項所述之記錄媒體，其中上 15 200425082 述之隱藏碼係以具有低頻成份之擺動的形式加以記錄，其 係不能使用一位元對位元拷貝加以複製。 23. —種用以記錄及重製記錄媒體中之資料的設備，該 設備至少包含： 一拾取單元，用以記錄資料於記錄媒體中或由該記錄 媒體讀取資料； 一防拷貝保護資訊計算單元，用以解密被加密及記錄 於該記錄媒體之第一特定區中之防拷貝保護資訊； 一資料處理單元，用以使用該防拷貝保護資料，解密 由記錄媒體所讀出之資料或者加密欲被記錄於該記錄媒體 的資料；及 一數位財產權管理資訊模組，用以分析及更新該資料 之數位財產權管理資訊，及基於該數位財產權管理資訊， 控制該防拷貝保護資訊之解密， 其中一使用該防拷貝保護資訊加密之資料串流係被記 錄於該記錄媒體的一資料區中，及該資料串流之數位財產 權管理資訊係記錄於該第一特定區中。 2 4.如申請專利範圍第23項所述之設備，其中上述之 數位財產權管理資訊係用以控制該資料串流之拷貝或播 放0 2 5 .如申請專利範圍第24項所述之設備，其中上述之 16 200425082 數位財 割時加 26 含數位 區時， 訊與該 拾取單 媒體的 27 包含數 料檔， 讀出。 28 於記錄 時，該 權管理 位財產 條件； 或拷貝 料處理 媒體之1 產權管理資訊係依據對應於資料串流之資料檔被分 以記錄。 .如申請專利範圍第23項所述之設備，其中當一包 財產權管理資訊之資料串流被加密及記錄在該資料 該數位財產權管理資訊模組將該數位財產權管理資 資料串流分開並更新該數位財產權管理資料，及該 兀*另外記錄被更新之數位財產權管理資訊於該記錄 第一特定區中。 •如申請專利範圍第26項所述之設備，其中上述之 位財產權管理資訊之資料串流係為自網路接收之資 及該數位財產權管理資訊係為由資料檔之標頭資= •如甲晴專利範圍第23項所述之設備，其中當董 於該記錄媒體中之資料串流的資料檔被重製1應 拾取單元由該第一特定區讀取該資料檔—拷貝 資訊’·該數位財產權管理資訊模組分析被讀取、產 權管理資訊，以確認是否滿足資料檔之播放=之數 該防拷貝保護資訊計算單元，"在資料产或拷貝 條件滿足時，才會解密該防拷貝保護資心之播放 單元’使用被解密之防拷貝保護資訊1密及該資 该資料區所讀出之該資料串流。 #、由記錄 17 200425082 29. 如申請專利範圍第28項所述之設備，其中當資料 檔之播放或拷貝被執行時，該數位財產權管理資訊模組更 新有關包含在該資料檔中之數位財產權管理資訊的所執行 播放或拷貝之資訊，及該拾取單元，記錄該更新資訊於該 第一特定區中，以該更新資訊覆寫。 30. 如申請專利範圍第23項所述之設備，其中該防拷 貝保護訊計算單元使用記錄於該記錄媒體之一第二特定區 中之一隱藏碼，解密該防拷貝保護資訊及數位財產權管理 資訊，該隱藏碼係以具有低頻成份之擺動形式加以記錄， 其係不能使用一位元對位元拷貝加以複製。 18
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