JP5209945B2 - 記憶装置、暗号化コンテンツの有効化方法及び端末装置 - Google Patents
記憶装置、暗号化コンテンツの有効化方法及び端末装置 Download PDFInfo
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Description
E(Ks,ID‖PW‖管理番号‖先頭LBA‖セクタ数)
をレンタル用記憶装置313へ送信する。なお、本発明の実施形態では、1セクタに対し1UPが記録されていること、更に1つの暗号化コンテンツに対応するUPが複数個存在した場合、それらのUPの記録先LBAQは連続していることを前提としている(ステップ801、802)。
E(KPdc[I],Kch[P])‖C(Kr,KPdc[P])1120
を記憶装置に送信する。
E(Kch[P],E(KPdc[P],Kch[I]‖KPd[I]))1123
をホスト装置に送信する(ステップ1106、1109、1111)。
E(Kch[I],E(KPd[I],Ks[P]0‖KPd[P]))1124
を記憶装置へ送信する(ステップ1136)。
E(KPd[P],E(Ks[P]0,Ks[I]0))1125
をホスト装置へ送信する(ステップ1119、1122)。
E(Ks[I]0,E(Ks[P]0,Ks[P]1))1202
を記憶装置に送信する(ステップ1200、1201)。
E(*KPd[P],E(Ks[P]1,UP))1209
をホスト装置へ送信する(ステップ1207、1208)。
101 記憶装置
102 ユーザ領域
103 暗号化コンテンツ
104 セキュア領域
105 UP(Usage Pass)
106 Validity Flag テーブル
107 復号部
108 デコーダ
300、308 証明書検証部
301、309 鍵生成部
302、310 暗復号部
303、311 不揮発性メモリ
304、307 制御部
305、306 インタフェース
312 記憶領域
313 レンタル用記憶装置
Claims (6)
- 外部装置と通信可能な記憶装置であって、
コンテンツを暗号化した暗号化コンテンツを格納する第一の記憶領域と、
前記暗号化コンテンツを復号するための鍵を格納する第二の記憶領域と、
前記暗号化コンテンツを復号するための鍵の状態の情報を格納する第三の記憶領域と、
コンテンツを再生する第1の外部装置から認証情報を受信する手段と、
前記第1の外部装置から受信した前記認証情報をもとに認証処理を実行する手段と、
前記第1の外部装置から前記暗号化コンテンツを復号するための鍵の位置情報を受信する手段と、
前記第1の外部装置から前記暗号化コンテンツを復号するための鍵の状態の情報を変更する命令を受信する手段と、
特定条件の下で受信した前記鍵の状態の情報を変更する命令を実行する手段と、
前記命令を実行した履歴を格納するための自身が保持する記憶領域であって、前記第一の記憶領域、前記第二の記憶領域、及び前記第三の記憶領域とは異なる記憶領域からなる履歴記憶領域と、
前記履歴記憶領域に前記履歴を記録する手段と、
前記第1または他の第2の外部装置から当該外部装置へ前記履歴を出力する命令を受信する手段と、
前記第1または第2の外部装置から前記履歴を出力する前記命令を受信した際、前記履歴を出力する命令を実行する手段とを有することを特徴とする記憶装置。 - 前記暗号化コンテンツを復号するための鍵の状態の情報が、1つの鍵につき1bit で表わされる情報であって、前記鍵の有効、無効を表す情報であることを特徴とする請求項1記載の記憶装置。
- 前記特定条件が、前記外部装置から受信した認証情報と、当該記憶装置が保持する認証情報とが同一の情報である場合であることを特徴とする請求項1記載の記憶装置。
- 外部装置と通信可能で暗号化コンテンツを格納している記憶装置の暗号化コンテンツの有効化方法であって、
前記記憶装置は、
コンテンツを暗号化した暗号化コンテンツを格納する第一の記憶領域と、
前記暗号化コンテンツを復号するための鍵を格納する第二の記憶領域と、
前記暗号化コンテンツを復号するための鍵の状態の情報を格納する第三の記憶領域と、
コンテンツを再生する第1の外部装置から認証情報を受信する手段と、
前記第1の外部装置から受信した前記認証情報をもとに認証処理を実行する手段と、
前記第1の外部装置から前記暗号化コンテンツを復号するための鍵の位置情報を受信する手段と、
前記第1の外部装置から前記暗号化コンテンツを復号するための鍵の状態の情報を変更する命令を受信する手段と、
特定条件の下で受信した前記鍵の状態の情報を変更する命令を実行する手段と、
前記命令を実行した履歴を格納するための自身が保持する記憶領域であって、前記第一の記憶領域、前記第二の記憶領域、及び前記第三の記憶領域とは異なる記憶領域からなる履歴記憶領域と、
前記履歴記憶領域に前記履歴を記録する手段と、
前記第1または他の第2の外部装置から当該外部装置へ前記履歴を出力する命令を受信する手段と、
前記第1または第2の外部装置から前記履歴を出力する前記命令を受信した際、前記履歴を出力する命令を実行する手段とを有して構成され、
前記認証情報を受信する手段は、外部装置が送信した認証情報及び前記暗号化コンテンツを復号するための鍵の位置情報を受信し、
前記認証処理を実行する手段は、認証情報が自記憶装置に記録されている認証情報と一致した場合、自記憶装置において、外部装置が指定した暗号化コンテンツを復号するための鍵の位置情報に対応する鍵の状態を有効にし、
前記命令を実行した履歴を自身が保持する記憶領域に記録する手段は、前記鍵の状態の情報を変更する命令を実行する手段が鍵の状態を有効にしたという履歴を、記憶装置が保持する記憶領域に記録し、
前記第1または他の第2の外部装置から記憶装置が保持している履歴を出力するよう要求を受けたとき、前記履歴記憶領域に格納された履歴を、前記要求を行った外部装置へ出力することを特徴とする暗号化コンテンツの有効化方法。 - 前記暗号化コンテンツを復号するための鍵の状態の情報が、1つの鍵につき1bit で表わされる情報であって、前記鍵の有効、無効を表す情報であることを特徴とする請求項4記載の暗号化コンテンツの有効化方法。
- 記憶装置と通信可能で、記憶装置内の暗号化コンテンツを再生する端末装置であって、
前記記憶装置から該記憶装置に記録されている暗号化コンテンツを復号するための鍵の位置情報を取得する手段と、
前記記憶装置から該記憶装置が保持する電子証明書を取得する手段と、
取得した電子証明書を検証する手段と、
前記電子証明書から該電子証明書が保持するサービス固有情報を抽出する手段と、
前記サービス固有情報の値が予め定められた特定値であった場合に、ユーザに認証情報及び視聴希望コンテンツ情報の入力を促す手段と、
前記ユーザが入力した情報と、ユーザが入力した視聴希望コンテンツ情報とに対応する暗号化コンテンツを復号するための鍵の位置情報を、前記記憶装置へ送信する手段と、
前記視聴希望コンテンツ情報に対応する暗号化コンテンツを復号するための鍵の状態を有効にする命令を前記記憶装置へ対し送信する手段と、
前記記憶装置が保持する履歴情報を取得する手段とを有することを特徴とする端末装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2007321046A JP5209945B2 (ja) | 2007-12-12 | 2007-12-12 | 記憶装置、暗号化コンテンツの有効化方法及び端末装置 |
US12/331,563 US8332640B2 (en) | 2007-12-12 | 2008-12-10 | Storage apparatus, method for validating encrypted content and terminal apparatus |
AU2008255221A AU2008255221A1 (en) | 2007-12-12 | 2008-12-10 | Storage apparatus, method for validating encrypted content and terminal apparatus |
EP08021464A EP2071572A1 (en) | 2007-12-12 | 2008-12-10 | Storage apparatus, method for validating encrypted content and terminal apparatus |
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JP2007321046A JP5209945B2 (ja) | 2007-12-12 | 2007-12-12 | 記憶装置、暗号化コンテンツの有効化方法及び端末装置 |
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JP5209945B2 true JP5209945B2 (ja) | 2013-06-12 |
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US7570641B2 (en) * | 2005-08-23 | 2009-08-04 | Macrovision Corporation | Techniques for watermarking and distributing content |
KR100960120B1 (ko) * | 2007-12-17 | 2010-05-27 | 한국전자통신연구원 | 시그니처 스트링 저장 메모리 최적화방법과 그 메모리 구조및 시그니처 스트링 패턴 매칭방법 |
US8775825B2 (en) | 2009-08-17 | 2014-07-08 | Cram Worldwide Llc | Digital content management and delivery |
US20120131339A1 (en) * | 2010-11-19 | 2012-05-24 | General Instrument Corporation | System and method for secure bi-directional communication |
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JP3792896B2 (ja) | 1997-05-13 | 2006-07-05 | 株式会社東芝 | 情報再生装置及び情報再生方法 |
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EP1949294A2 (en) * | 2005-11-18 | 2008-07-30 | Sandisk Corporation | Method and system for managing keys and/or rights objects |
JP4585460B2 (ja) * | 2006-01-27 | 2010-11-24 | 株式会社日立製作所 | 同一コンテンツから派生した形式の異なるコンテンツを複数個所で同時に利用することを防ぐ記憶装置、システム及び方法 |
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AU2008255221A1 (en) | 2009-07-02 |
US20090177886A1 (en) | 2009-07-09 |
EP2071572A1 (en) | 2009-06-17 |
JP2009147545A (ja) | 2009-07-02 |
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