JP2008514123A - デジタルコンテンツへの認可されたアクセスを提供するためのシステム及び方法 - Google Patents
デジタルコンテンツへの認可されたアクセスを提供するためのシステム及び方法 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
- H04L9/0825—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
- H04L9/0822—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using key encryption key
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
- H04L9/083—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
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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
- H04N21/25—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]
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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
- H04N21/25—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
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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
- H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
- H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
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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]
- H04N21/60—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
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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]
- H04N21/80—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
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- 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
- G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/60—Digital content management, e.g. content distribution
- H04L2209/603—Digital right managament [DRM]
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Databases & Information Systems (AREA)
- Computing Systems (AREA)
- Theoretical Computer Science (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Storage Device Security (AREA)
Abstract
Description
430にて、やはり登録の一環として、サービスプロバイダはユーザの受信機に関するユニークなデバイスユニット鍵220(図2)、また随意では、デバイス構成データや、特定のコンテンツアクセスサービスを指定しない一般的な資格をユーザに提供する(例えば、メモリ320又はメモリ360に記憶)。上述のように、デバイスユニット鍵220は公開鍵で暗号化されて配信され、受信機のユニークな公開鍵/秘密鍵ペアの対応する秘密鍵によって受信機内部で解読される(メモリ360に記憶)。
Claims (16)
- コンピュータ可読媒体上に符号化されており、デバイスの受信するコンテンツへのアクセスを認可するためのコンピュータ可読データ構造であって、
コンピュータ可読媒体上に符号化されている第1のレコードと、第1のレコードはデバイスが公開鍵解読を行うために用いる公開鍵、秘密鍵及び関連するデジタル証明書を含むことと、
コンピュータ可読媒体上に符号化されている第2のレコードと、第2のレコードは公開鍵によって暗号化され秘密鍵によって解読される対称鍵であるデバイスユニット鍵を含むことと、デバイスユニット鍵はデバイスに対しユニークであることと、
コンピュータ可読媒体上に符号化されている第3のレコードと、第3のレコードはデバイスユニット鍵によって暗号化され認証される対称鍵である1つ以上のサービス鍵を含むことと、
コンピュータ可読媒体上に符号化されている第4のレコードと、第4のレコードは第1のタイプのコンテンツアクセス及び別の第2のタイプのコンテンツアクセスを解読するために用いられる対称鍵である1つ以上の番組鍵を含むことと、
デバイスユニット鍵は第1のタイプのコンテンツアクセスの解読に使用するための1つ以上の番組鍵の暗号化及び認証を行うことと、1つ以上のサービス鍵は第2のタイプのコンテンツアクセスの解読に使用するための1つ以上の番組鍵の暗号化及び認証を行うことと、からなるコンピュータ可読データ構造。 - デバイスユニット鍵は、
1つ以上のサービス鍵若しくは1つ以上の番組鍵の暗号化を行う第1の対称鍵、又は、
1つ以上のサービス鍵若しくは1つ以上の番組鍵の認証を行う第2の対称鍵、を含む請求項1に記載のコンピュータ可読データ構造。 - 第2のレコードは所定の周期で更新される請求項1に記載のコンピュータ可読データ構造。
- 1つ以上のサービス鍵は複数のサービス鍵を含むことと、1つ以上の番組鍵は複数の番組鍵を含むことと、複数のサービス鍵の各々は複数の番組鍵の各々に対しユニークであり複数の番組鍵の各々の解読を行うことと、を含む請求項1に記載のコンピュータ可読データ構造。
- 1つ以上のサービス鍵は、
1つ以上の番組鍵の暗号化を行う第1の対称鍵と、
1つ以上の番組鍵の認証を行う第2の対称鍵と、を含む請求項1に記載のコンピュータ可読データ構造。 - 1つ以上のサービス鍵は所定の周期で更新される請求項5に記載のコンピュータ可読データ構造。
- 第1のタイプのコンテンツアクセスはコンテンツペイパービューイベント用であり、第2のタイプのコンテンツはコンテンツ加入サービス用である請求項1に記載のコンピュータ可読データ構造。
- コンピュータ可読媒体上に符号化されている第5のレコードと、第5のレコードは1つ以上の番組鍵と第2のタイプのコンテンツアクセスによる情報との組合せから導出されるコンテンツ解読鍵を含むことと、を含む請求項1に記載のコンピュータ可読データ構造。
- コンテンツを受信するためにデバイスによってアクセス可能なスマートカード及びコンピュータ可読媒体のうちの一方において符号化されている請求項1に記載のコンピュータ可読データ構造。
- コンテンツへの認可されたアクセスを提供するための方法であって、
コンテンツアクセスの要求を受信する要求受信工程と、
要求に応答して、公開暗号鍵及び秘密暗号鍵を有する非対称鍵ペアを提供する非対称鍵ペア提供工程と、
資格管理メッセージ(EMM)を提供する管理メッセージ提供工程と、同工程は、
a)公開暗号鍵によってデバイスユニット鍵を暗号化するデバイスユニット鍵暗号化工程と、デバイスユニット鍵は要求の送信元に対しユニークであることと、
b)少なくともデバイスユニット鍵によってサービス鍵を暗号化するサービス鍵暗号化工程と、サービス鍵は番組鍵の解読を行うように動作可能であることと、を含むことと、
第1のタイプのコンテンツアクセス又は別の第2のタイプのコンテンツアクセスに資格制御メッセージ(ECM)を提供する制御メッセージ提供工程と、同工程は、
a)第1のタイプのコンテンツアクセス又は第2のタイプのコンテンツアクセスを解読するためにECMに番組鍵を提供する番組鍵提供工程と、
b)第1のタイプのコンテンツアクセス用のサービス鍵によってECMを暗号化する第1ECM暗号化工程と、
c)第2のタイプのコンテンツアクセス用のデバイスユニット鍵によってECMを暗号化する第2ECM暗号化工程と、を含むことと、からなる方法。 - 第1ECM暗号化工程はサービス鍵によって番組鍵を暗号化する工程を含むことと、
第2ECM暗号化工程はデバイスユニット鍵によって番組鍵を暗号化する工程を含むことと、を含む請求項10に記載の方法。 - 第1のタイプのコンテンツアクセスはコンテンツ加入サービスタイプであり、第2のタイプのコンテンツアクセスはコンテンツペイパービューイベントタイプである、請求項10に記載の方法。
- 管理メッセージ提供工程は、
少なくともデバイスユニット鍵によって別のサービス鍵を暗号化する工程と、別のサービス鍵はサービス鍵の失効時に第1のタイプのコンテンツアクセスの解読を行うことと、
EMMはサービス鍵及び別のサービス鍵を含むことと、を含む請求項10に記載の方法。 - 定期的に管理メッセージ提供工程を反復し、さらなるEMMを生成する工程と、各EMMは各EMMの生成の順序に基づき最初から最後へ順次値の増大する鍵識別子を含むことと、を含む請求項10に記載の方法。
- 制御メッセージ提供工程は、
第2のタイプコンテンツアクセスのコンテンツが番組鍵によって解読されたとき、同コンテンツが記憶される期間の長さを指定する第1のアクセス規則を提供する工程を含む請求項12に記載の方法。 - コンテンツアクセスの要求の送信元は、非対称鍵ペアへのアクセスを有し、かつ、コンテンツへのアクセスを提供する受信機を含む請求項10に記載の方法。
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Application Number | Priority Date | Filing Date | Title |
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US61044804P | 2004-09-16 | 2004-09-16 | |
PCT/US2005/033042 WO2006033997A2 (en) | 2004-09-16 | 2005-09-16 | System and method for providing authorized access to digital content |
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JP2008514123A true JP2008514123A (ja) | 2008-05-01 |
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JP2007532477A Pending JP2008514123A (ja) | 2004-09-16 | 2005-09-16 | デジタルコンテンツへの認可されたアクセスを提供するためのシステム及び方法 |
Country Status (8)
Country | Link |
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US (1) | US7404082B2 (ja) |
EP (1) | EP1792485A4 (ja) |
JP (1) | JP2008514123A (ja) |
KR (2) | KR101292400B1 (ja) |
CN (1) | CN101019427B (ja) |
CA (1) | CA2580380C (ja) |
MX (1) | MX2007003228A (ja) |
WO (1) | WO2006033997A2 (ja) |
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EP1792485A4 (en) | 2009-03-18 |
EP1792485A2 (en) | 2007-06-06 |
WO2006033997A2 (en) | 2006-03-30 |
CN101019427A (zh) | 2007-08-15 |
WO2006033997A3 (en) | 2006-12-21 |
MX2007003228A (es) | 2008-01-16 |
CA2580380C (en) | 2013-10-15 |
KR20130081709A (ko) | 2013-07-17 |
CN101019427B (zh) | 2010-11-03 |
US20060059342A1 (en) | 2006-03-16 |
US7404082B2 (en) | 2008-07-22 |
KR101318461B1 (ko) | 2013-10-16 |
KR101292400B1 (ko) | 2013-08-01 |
KR20070050969A (ko) | 2007-05-16 |
CA2580380A1 (en) | 2006-03-30 |
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