JP4819059B2 - デスクランブル方法及びデスクランブル装置 - Google Patents
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Description
Claims (21)
- スクランブルされたデジタルコンテンツを、加入者端末装置内でデスクランブルするデスクランブル方法において、
上記加入者端末装置の第1のコンポーネントによって、デジタル権利管理を行い、デスクランブルされたフォーマットのデジタルコンテンツにアクセスするために必要な権利を、該加入者端末装置が使用可能であるかを判定するステップと、
上記第1のコンポーネントから論理的に分離され、独立した、上記加入者端末装置の第2のコンポーネントによって、デジタルコンテンツにアクセスするために必要な全ての権利を、該加入者端末装置が使用可能であるとの判定に応じて、スクランブルされたデジタルコンテンツをデスクランブルするために用いられるサービスキーを平文化するために用いられるキーを導出するステップとを有し、
上記キーを導出するステップは、固有キーを用いて暗号化されたデータを平文化し、その後、該平文化されたデータをハッシュ処理し、該キーを生成するステップを含むことを特徴とするデスクランブル方法。 - 上記第1のコンポーネントは、メインの中央処理装置(CPU)であり、上記第2のコンポーネントは、デスクランブラであることを特徴とする請求項1記載のデスクランブル方法。
- 上記キーを導出する前に、デジタルコンテンツにアクセスするために権利が必要であり、上記加入者端末装置が該権利を現在使用できない場合、該加入者端末装置の加入者に権利を購入するための入力を促すステップを更に有する請求項1記載のデスクランブル方法。
- 上記加入者に入力を促すステップは、上記加入者端末装置と通信するディスプレイ装置に表示され、選択可能なフィールドを含む画像を生成するステップを含むことを特徴とする請求項3記載のデスクランブル方法。
- 上記キーを導出する前に、上記選択可能なフィールドの選択に応じて、上記加入者端末装置に送信される選択された権利の要求であるメッセージをヘッドエンドに送信するステップを更に有する請求項4記載のデスクランブル方法。
- 上記選択可能なフィールドの選択は、上記加入者がアクセスできる制御ユニットによって実行されることを特徴とする請求項5記載のデスクランブル方法。
- 上記デジタル権利管理を行うステップは、それぞれがデジタルコンテンツの再生を制御する複数の必要な権利を分析するステップを含むことを特徴とする請求項1記載のデスクランブル方法。
- 上記キーは、ハッシュ値であることを特徴とする請求項1記載のデスクランブル方法。
- スクランブルされたデジタルコンテンツを受信し、デスクランブルするデスクランブル装置において、
上記デジタルコンテンツにアクセスするために各権利が必要かを判定するデジタル権利管理(DRM)機能を実行するプロセッサと、
上記デジタルコンテンツにアクセスするために必要な各権利が予め保存されているとの判定に基づいて、一回のみ書込可能なメモリ内に保存されている固有キーを用いて、スクランブルされたデジタルコンテンツをデスクランブルし、該デジタルコンテンツを再生するために用いられる少なくとも1つのサービスキーを平文化するためのキーを生成するために用いられる暗号化情報を平文化するデスクランブラとを備え、
前記デスクランブラは、少なくとも第1の処理ブロック及び第2の処理ブロックを有する処理ブロックのシーケンスであって、キーのラダー接続を構成する処理ブロックのシーケンスを備え、上記第1の処理ブロックは、上記固有キーによって、暗号化されている複数のキーを平文化し、複数の平文化キーを生成し、上記第2の処理ブロックは、複数の平文化キーを用いて一方向ハッシュ処理を行い、上記キーを生成するデスクランブル装置。 - 上記プロセッサ及びデスクランブラは、単一の集積回路内に設けられていることを特徴とする請求項9記載のデスクランブル装置。
- 上記キーのラダー接続ラは、上記スクランブルされたデジタルコンテンツをデスクランブルするための上記少なくとも1つのサービスキーを再生するためのキーを生成するよう構成されていることを特徴とする請求項9記載のデスクランブル装置。
- 上記デスクランブラは、プロセッサを含まず、それぞれが専用機能を有する上記処理ブロックのシーケンスによって実現されることを特徴とする請求項11記載のデスクランブル装置。
- 上記処理ブロックのシーケンスの第1の処理ブロックは、固有キーによって暗号化された複数のキーを平文化し、複数の平文化キーを生成することを特徴とする請求項12記載のデスクランブル装置。
- 上記処理ブロックのシーケンスの第2の処理ブロックは、複数の平文化キーの少なくとも1つと、少なくとも1つの予め算出されたハッシュ値とを用いて、一方向ハッシュ処理を行い、キーを生成することを特徴とする請求項13記載のデスクランブル装置。
- 上記処理ブロックのシーケンスの第3の処理ブロックは、供給されるスクランブルされたデジタルコンテンツをデスクランブルし、デスクランブルされたデジタルコンテンツを生成することを特徴とする請求項14記載のデスクランブル装置。
- 上記キーは、ハッシュ値であることを特徴とする請求項12記載のデスクランブル装置。
- 当該デスクランブル装置は、伝送媒体を介して、ディスプレイと、ハードディスク記録ユニットと、加入者端末装置とに接続され、上記デスクランブラは、複数の処理ブロックに接続され、デスクランブルされたデジタルコンテンツを受信し、上記伝送媒体を介して上記加入者端末装置に伝送するために、該デジタルコンテンツを再暗号化する暗号化ロジックを備えることを特徴とする請求項11記載のデスクランブル装置。
- 供給されるスクランブルされたコンテンツをデスクランブルする集積回路装置において、
デジタル権利管理(DRM)機能を実行する第1のコンポーネントと、
固有キーを保存する一回のみ書込可能なメモリを含み、DRM機能から完全に独立して動作する第2のコンポーネントとを備え、
上記第2のコンポーネントは、少なくとも第1の処理ブロック及び第2の処理ブロックを有する処理ブロックのシーケンスであって、キーのラダー接続を構成する処理ブロックのシーケンスによって実現され、
上記第2のコンポーネントは、動作可能な状態にある場合、上記第1の処理ブロックにおいて、上記固有キーを用いて暗号化情報を平文化し、第2の処理ブロックにおいて、平分化され当該情報をハッシュ化し、上記コンテンツにアクセスするために必要な各権利が当該集積回路装置内に保存されているとの判定に基づいて、スクランブルされたコンテンツをデスクランブルするために用いられる少なくとも1つのサービスキーを平文化するために用いられるキーを生成することを特徴とする集積回路装置。 - 上記第1のコンポーネント及び第2のコンポーネントは、単一の集積回路内に設けられていることを特徴とする請求項18記載の集積回路装置。
- 上記第1のコンポーネントは、プロセッサであることを特徴とする請求項18記載の集積回路装置。
- 上記第2のコンポーネントは、それぞれが専用機能を有し、処理ブロックのシーケンスによって実現されるデスクランブラであり、少なくとも1つのサービスキーを再生するキーを生成するようキーのラダー接続は構成されることを特徴とする請求項20記載の集積回路装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US10/962,830 US8572408B2 (en) | 2002-11-05 | 2004-10-11 | Digital rights management of a digital device |
US10/962,830 | 2004-10-11 | ||
PCT/US2005/031171 WO2006041590A2 (en) | 2004-10-11 | 2005-08-31 | Digital rights management of a digital device |
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JP2008516551A JP2008516551A (ja) | 2008-05-15 |
JP4819059B2 true JP4819059B2 (ja) | 2011-11-16 |
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JP2007536692A Expired - Fee Related JP4819059B2 (ja) | 2004-10-11 | 2005-08-31 | デスクランブル方法及びデスクランブル装置 |
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US (1) | US8572408B2 (ja) |
EP (1) | EP1800480B1 (ja) |
JP (1) | JP4819059B2 (ja) |
CN (1) | CN101040526B (ja) |
WO (1) | WO2006041590A2 (ja) |
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US20060198519A9 (en) | 2006-09-07 |
JP2008516551A (ja) | 2008-05-15 |
WO2006041590A3 (en) | 2007-01-25 |
CN101040526A (zh) | 2007-09-19 |
US20050063541A1 (en) | 2005-03-24 |
WO2006041590A2 (en) | 2006-04-20 |
CN101040526B (zh) | 2011-09-07 |
EP1800480B1 (en) | 2020-05-13 |
EP1800480A4 (en) | 2012-10-17 |
US8572408B2 (en) | 2013-10-29 |
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