JP2005532750A - デジタルコンテンツ用コンテンツおよびキーを配布する方法 - Google Patents
デジタルコンテンツ用コンテンツおよびキーを配布する方法 Download PDFInfo
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Abstract
Description
これらの以下の各用語の一般的意味は、説明に役立つよう意図されており、決して限定することを意図してはいない。
図1は、メディアストリームを表わすデジタルコンテンツに対するコンテンツおよびキーの配布のためのシステムのブロック図を示している。
図2は、メディアストリームを表わすデジタルコンテンツに対する、コンテンツおよびキーを配布するための方法のフロー図を示している。
フローポイント210Aでは、システム100は、メディアストリームを表示するオリジナルデジタルコンテンツ124を取り込む準備ができている。
フローポイント220Aでは、システム100は、1つ以上のユーザサブシステム140への不活性コンテンツ122の配信準備ができている。
フローポイント230Aでは、システム100は、ユーザサブシステム140に関連して、選択された提示装置143を指定する(デジタルコンテンツの選択されたアイテムに対して特定の)ライセンス133を発行する準備ができている。
・メディアストリームに対するリリースの日付;
・メディアストリームに対する最終表示日付;
・メディアストリームに対する1つ以上の「ブラックアウト」の期間;
・メディアストリームの提示についての地理的あるいは他の地域的制限(例えば、ヨーロッパでの使用のみ、あるいはそのメディアストリームが禁止されている、選択された国の外部での使用のみにライセンスされたメディアストリームのバージョンなど);
・メディアストリームの提示に対する財政的あるいは他の前提条件(例えば、視聴料金、ファイルについての非公開協定を有する要件、あるいは会社内部の選択された認可要件など)。
・サブステップ233(a)では、ライセンスサーバ130の機密保護部分135は、キーサーバから特定のユーザコンテンツキー127を取得するか(上述のように、キーサーバは、その非機密保護部分内にキーを保存する場合もある)、あるいはユーザサブシステム140から、適宜、特定のメディアコンテンツキー128を取得する。1つの実施例では、ユーザコンテンツキー127は、特定のユーザに関連付けられているが、この関連性が厳密に維持される必要があるという、いかなる特定の要件も存在しない。第1例では、ユーザコンテンツキー127は、特定のユーザに添付される以前に次へ回されてしまう問屋のレシートと同様に、それがどのユーザに関連付けられているかを知る以前に割り当てられる場合もある。(この例は、例えば、所有者がインストーラあるいはビデオ店であるときなど、ユーザサブシステム140を転売する必要がある場合に役立つものとなろう。)第2例では、ユーザコンテンツキー127は、組織に関連付けられており、その結果、時として、その組織内の異なる実際のユーザに関連付けられている場合もあろう。第3例では、ユーザコンテンツキー127は、例えば、家族、社交クラブ、あるいは協同組合など、実際のユーザの(通常、相対的に小さな)グループに関連付けられている場合もあろう。
フローポイント240Aでは、システム100は、選択された提示装置143にメディアストリームを提示する準備ができている。
・サブステップ241(a)では、提示装置143の機密保護部分144は、不活性ライセンス133をその提示装置キー134で復号化する。
フローポイント250Aでは、ユーザサブシステム140は、メディア読取装置146を用いて物理メディア147を取り込む準備ができている。
・サブステップ254(a)では、サブステップ241(a)と同様に、メディア読取装置146は、不活性ライセンス133をそのリーダー装置キー134(提示装置キー134と同様)で復号化する。
本明細書には、好適な実施例が開示されているが、本発明の概念、範囲、および趣旨内に留まりながらも、多くの変形形態が可能である。これらの変形形態は、この出願を熟読すれば、当業者に明白となろう。
Claims (15)
- 以下のステップを含んでいる方法
ユーザへ、メディアストリームの少なくとも一部分を表示するデジタルコンテンツを配信するステップ、デジタルコンテンツは、そのユーザによる検査あるいは改ざんに対してロックされている;
そのデジタルコンテンツをアンロック可能な、コンテンツキーを含むライセンスを、そのユーザへ別々に配信するステップ、コンテンツキーは、ユーザが所有する、選択された提示装置以外の装置による、検査あるいは改ざんに対してロックされている;
ここで、選択された提示装置は、提示装置キーと関連付けられており、提示装置の機密保護部分は、この提示装置キーを用いてライセンスをアンロック可能であり;
それにより、そのユーザは、選択された提示装置での、そのメディアストリームの提示に制限される。 - 以下のステップを含んでいる、請求項1に記載の方法
物理メディアからデジタルコンテンツの少なくとも一部分を読み出すステップ;
コンテンツキーを用いて物理メディアから読み出されたその部分を暗号化するステップ:
それにより、ユーザは、物理メディアから読み出されたデジタルコンテンツの提示のためのライセンスを有するよう制限される。 - 請求項1に記載の方法において、ロックされたデジタルコンテンツの少なくとも一部分が、以下の少なくとも1つを用いてユーザへ配信される:(a)通信リンク、あるいは、(b)デジタルコンテンツを読み出し可能な物理メディア。
- 請求項1に記載の方法において、ロックされたデジタルコンテンツの少なくとも一部分が、1つより多いこうした提示装置への可能な配信のために、ユーザにより保存されている。
- 請求項1に記載の方法において、ライセンスの少なくとも一部分が、以下の少なくとも1つを用いてユーザへ配信される、(a)通信リンク、あるいは、(b)デジタルコンテンツを読み出し可能な物理メディア。
- 請求項1に記載の方法において、デジタルコンテンツが暗号化の形式を用いてロックされ、コンテンツキーが、そのデジタルコンテンツの復号化に関連付けられている。
- 請求項1に記載の方法において、メディアストリームが、以下の少なくとも1つを含んでいるアニメーションあるいは音、静止メディア、写真あるいはイラスト、データベース、情報の他のコレクション。
- 請求項1に記載の方法において、デジタルコンテンツが、メディアストリームの提示以外に、ユーザによる検査が可能な少なくとも何らかの情報を含んでいる。
- 請求項8に記載の方法において、検査が可能なその情報が、以下の少なくとも1つを含む、メディアストリームについての情報を有している。(a)タイトル、(b)フィルムクリップ、(c)概要、(d)メディアストリームの作者、俳優、ジャンル、あるいはレーティングに関連付けられている、1組の情報。
- 請求項8に記載の方法において、検査が可能なその情報が、メディアストリームに関するメタデータを含んでいる。
- 請求項1に記載の方法において、ライセンスが、そのメディアストリームの提示に制限を課す。
- 制限が、(a)メディアストリームに対して提示が許可される最初の日付あるいは時間、(b)メディアストリームに対して提示が許可される最後の日付あるいは時間、(c)メディアストリームに対して許可される提示の制限された数、(d)メディアストリームに対して提示が許可される制限された物理領域、(e)メディアストリームに対して提示が許可されることに関連付けられた、料金、コスト、報酬、あるいは予約、(f)提示装置のタイプ、(g)提示装置により使用される出力フォーマット、(h)提示装置により使用されるビットレート、サンプリングレート、あるいは、粒状度もしくは正確さの他の尺度、の少なくとも1つを含んでいる、請求項11に記載の方法。
- 請求項11に記載の方法において、ライセンスが更新あるいは取消可能である。
- 請求項11に記載の方法において、ライセンスが改ざんされているか否かを明らかにすることができる保全符号を、そのライセンスが含んでいる。
- 請求項1に記載の方法において、提示装置のその機密保護部分が、それらのいずれかの通信路の侵入に相対的に抵抗力がある要素を含んでおり、提示装置キー、コンテンツキー、あるいはデジタルコンテンツが検査され、あるいは改ざんされるのを許容しない。
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US10/356,322 US7003131B2 (en) | 2002-07-09 | 2003-01-31 | Watermarking and fingerprinting digital content using alternative blocks to embed information |
US10/356,322 | 2003-01-31 | ||
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US10/356,692 US7111171B2 (en) | 2002-07-09 | 2003-01-31 | Parallel distribution and fingerprinting of digital content |
US10/377,266 US7188248B2 (en) | 2002-07-09 | 2003-02-28 | Recovering from de-synchronization attacks against watermarking and fingerprinting |
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US10/378,046 US7036024B2 (en) | 2002-07-09 | 2003-02-28 | Detecting collusion among multiple recipients of fingerprinted information |
PCT/US2003/021403 WO2004006579A1 (en) | 2002-07-09 | 2003-07-09 | Content and key distribution system for digital content representing media streams |
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JP2005532750A5 JP2005532750A5 (ja) | 2006-08-24 |
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US7036024B2 (en) | 2006-04-25 |
US7188248B2 (en) | 2007-03-06 |
JP4916110B2 (ja) | 2012-04-11 |
US20040010692A1 (en) | 2004-01-15 |
US20040086122A1 (en) | 2004-05-06 |
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