JP4304220B2 - 自己保護文書が記録されたコンピュータ読み取り可能な記録媒体及び自己保護文書を使用する方法 - Google Patents
自己保護文書が記録されたコンピュータ読み取り可能な記録媒体及び自己保護文書を使用する方法 Download PDFInfo
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- JP4304220B2 JP4304220B2 JP2007182191A JP2007182191A JP4304220B2 JP 4304220 B2 JP4304220 B2 JP 4304220B2 JP 2007182191 A JP2007182191 A JP 2007182191A JP 2007182191 A JP2007182191 A JP 2007182191A JP 4304220 B2 JP4304220 B2 JP 4304220B2
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6209—Protecting access to data via a platform, e.g. using keys or access control rules to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/106—Enforcing content protection by specific content processing
- G06F21/1063—Personalisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/107—License processing; Key processing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/16—Program or content traceability, e.g. by watermarking
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/2141—Access rights, e.g. capability lists, access control lists, access tables, access matrices
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/2151—Time stamp
Description
(Rights-Language-Version: 1.02)
(Work-ID: "ISDN-1-55860-166-X; AAP-2348957tut")
(Description: "Title: 'Zuke-Zack, the Moby Dog Story'
Author: 'John Beagle'
Copyright 1994 Jones Publishing")
(Owner: (Certificate:
(Authority: "Library of Congress")
(ID: "Murphy Publishers")))
(Parts: "Photo-Celebshots-Dogs-23487gfj" "Dog-Breeds-Chart-AKC")
(Comment: "Rights edited by Pete Jones, June 1996.")
(Contents: (From: 1)(To: 16636))
(Rights-Group: "Regular"
(Comment: "This set of rights is used for standard retail editions.")
(Bundle:
(Time: (Until: 1998/01/01 0:01))
(Fee: (To: "Jones-PBLSH-18546789")(House: "Visa")))
(Play:
(Fee (Metered: (Rate: 1.00 USD)(Per: 1:0:0)(By: 0:0:1)) ))
(Print:
(Fee: (Per-Use: 10.00 USD))
(Printer:
(Certificate:
(Authority: "DPT"
(Type: "TrustedPrinter-6")))
(Watermark:
(Watermark-Str: "Title: 'Zeke Zack - the Moby Dog'
Copyright 1994
by Zeke Jones.
All Right Reserved.")
(Watermark-Tokens: user-id institution-location
render-name render-time) )))
(Transfer:)
(Copy: (Fee: (Per-Use: 10.00 USD) ))
(Copy: (Access:
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ここで、暗号化関数と復号関数とが可換である場合、つまり、任意のxに対してE(D(x))=D(E(x))となる場合には、R'が可能かどうかは次の式で確認できる。
実際には、RSAシステム及びEIGamal離散対数システム等の一般的な公開鍵暗号システムの暗号化及び復号関数はこの可換性の要求を満足する。つまり、暗号化及び復号にこれらの復号システムを使用する場合、変換R'は可能である。
R'(y)=E(R(D(y)))=R(E(D(y)))=R(y)
となる。尚、この場合、R'=Rである。
Claims (10)
- ユーザシステムの有形記憶媒体に格納されるデータとして具体化された自己保護文書(510)が記録されたコンピュータ読み取り可能な記録媒体であって、
前記自己保護文書は、
データ部分(914)と形式部分(916)とを含む保護コンテンツ(522)を表すデータを含むコンテンツセグメント(516)と、
前記保護コンテンツに対する1つまたは複数のユーザの権利、または前記ユーザの権利が得られる場所に関する外部情報へのリンクを含む許可セグメント(514)と、
前記ユーザの権利に従って前記保護コンテンツの使用を認可する能力を提供するよう構成された権利行使サブセクション(524)と、前記保護コンテンツを解釈できるフォーマットに変換する能力を提供するよう構成された変換サブセクション(526,528)とを含む、コードセグメント(512)と、
を含み、
前記データ部分(914)は暗号化されて、暗号化されたデータ部分と暗号化されていない前記形式部分(916)とを含む暗号化コンテンツにされることができ、前記暗号化されたデータ部分は復号化されて、復号化されたデータ部分と前記暗号化されていない形式部分とを含む復号化コンテンツにされることができ、
前記変換サブセクションによって提供される前記保護コンテンツを変換する能力は、前記暗号化されたデータ部分を復号化して復号化されたデータ部分にすること、前記復号化されたデータ部分と前記暗号化されていない形式部分とをマージして、復号化コンテンツにすること、及び前記復号化されたコンテンツをプレゼンテーションデータ(430)に変換することを含むことを特徴とするコンピュータ読み取り可能な記録媒体。 - 請求項1に記載のコンピュータ読み取り可能な記録媒体において、前記変換する能力は、前記復号化されたデータ部分を再暗号化鍵(418,920)を用いて再暗号化することを含むことを特徴とするコンピュータ読み取り可能な記録媒体。
- 請求項1または2に記載のコンピュータ読み取り可能な記録媒体において、前記コードセグメント(512)はさらに、前記変換サブセクションによって変換されたコンテンツを解釈する能力を提供するよう構成された解釈サブセクション(532)を含むことを特徴とするコンピュータ読み取り可能な記録媒体。
- 請求項1〜3のいずれか1項に記載のコンピュータ読み取り可能な記録媒体において、前記コンテンツセグメント(516)における保護コンテンツは実行可能コードを含み、前記コードセグメントはさらに、前記保護コンテンツを抽出して使用する能力を提供するよう構成されていることを特徴とするコンピュータ読み取り可能な記録媒体。
- 請求項1〜4のいずれか1項に記載のコンピュータ読み取り可能な記録媒体において、前記許可セグメント(514)におけるユーザの権利は、複数の条件を含むことを特徴とするコンピュータ読み取り可能な記録媒体。
- ユーザシステムの有形記憶媒体に格納されるデータとして具体化された自己保護文書(510)を使用する方法であって、
前記自己保護文書は、
データ部分(914)と形式部分(916)とを含む保護コンテンツ(522)を表すデータを含むコンテンツセグメント(516)と、
前記保護コンテンツに対する1つまたは複数のユーザの権利、または前記ユーザの権利が得られる場所に関する外部情報へのリンクを含む許可セグメント(514)と、
前記ユーザの権利に従って前記保護コンテンツの使用を認可する能力を提供するよう構成された権利行使サブセクション(524)と、前記保護コンテンツを解釈できるフォーマットに変換する能力を提供するよう構成された変換サブセクション(526,528)とを含む、コードセグメント(512)と、
を含み、
前記データ部分(914)は暗号化されて、暗号化されたデータ部分と暗号化されていない前記形式部分(916)とを含む暗号化コンテンツにされることができ、前記暗号化されたデータ部分は復号化されて、復号化されたデータ部分と前記暗号化されていない形式部分とを含む復号化コンテンツにされることができ、
前記方法は、コンピュータが、
前記権利行使サブセクション(524)を実行するステップであって、前記権利行使サブセクションが実行されると、前記許可セグメント(514)におけるユーザの権利に対してユーザが要求したアクションを比較すること、前記ユーザの権利によって前記要求されたアクションを許可または否定すること、を含むステップと、
前記保護文書を解釈できる変換バージョンに変換するステップであって、前記変換は、復号化鍵(414)を取得すること、前記復号化鍵を用いて前記暗号化されたデータ部分を復号化し、復号化されたデータ部分にすること、前記復号化されたデータ部分と前記暗号化されていない形式部分とをマージして、復号化コンテンツにすること、及び前記復号化されたコンテンツをプレゼンテーションデータ(430)に変換することを含むステップと、
前記保護文書の変換されたバージョンを解釈アプリケーションに送信するステップと、
を含む処理を実行することを特徴とする方法。 - 請求項6に記載の方法において、前記変換する能力は、前記復号化されたデータ部分を再暗号化鍵(418,920)を用いて再暗号化することを含むことを特徴とする方法。
- 請求項6または7に記載の方法において、前記コードセグメント(512)はさらに、前記変換サブセクションによって変換されたコンテンツを解釈する能力を提供するよう構成された解釈サブセクション(532)を含むことを特徴とする方法。
- 請求項6〜8のいずれか1項に記載の方法において、前記コンテンツセグメント(516)における保護コンテンツは実行可能コードを含み、前記コードセグメントはさらに、前記保護コンテンツを抽出して使用する能力を提供するよう構成されていることを特徴とする方法。
- 請求項6〜9のいずれか1項に記載の方法において、前記許可セグメント(514)におけるユーザの権利は、複数の条件を含むことを特徴とする方法。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/178,529 US6519700B1 (en) | 1998-10-23 | 1998-10-23 | Self-protecting documents |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29259599A Division JP4235691B2 (ja) | 1998-10-23 | 1999-10-14 | 自己保護文書システム |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007328798A JP2007328798A (ja) | 2007-12-20 |
JP4304220B2 true JP4304220B2 (ja) | 2009-07-29 |
Family
ID=22652901
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29259599A Expired - Lifetime JP4235691B2 (ja) | 1998-10-23 | 1999-10-14 | 自己保護文書システム |
JP2007182191A Expired - Fee Related JP4304220B2 (ja) | 1998-10-23 | 2007-07-11 | 自己保護文書が記録されたコンピュータ読み取り可能な記録媒体及び自己保護文書を使用する方法 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29259599A Expired - Lifetime JP4235691B2 (ja) | 1998-10-23 | 1999-10-14 | 自己保護文書システム |
Country Status (6)
Country | Link |
---|---|
US (2) | US6519700B1 (ja) |
EP (2) | EP0999488B1 (ja) |
JP (2) | JP4235691B2 (ja) |
AT (1) | ATE303630T1 (ja) |
DE (1) | DE69926970T8 (ja) |
ES (1) | ES2248952T3 (ja) |
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JP2000137649A (ja) | 2000-05-16 |
EP0999488B1 (en) | 2005-08-31 |
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EP1612641A2 (en) | 2006-01-04 |
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ES2248952T3 (es) | 2006-03-16 |
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