JP2001076425A5 - - Google Patents
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- JP2001076425A5 JP2001076425A5 JP1999253660A JP25366099A JP2001076425A5 JP 2001076425 A5 JP2001076425 A5 JP 2001076425A5 JP 1999253660 A JP1999253660 A JP 1999253660A JP 25366099 A JP25366099 A JP 25366099A JP 2001076425 A5 JP2001076425 A5 JP 2001076425A5
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Description
【特許請求の範囲】
【請求項１】
情報送信装置から送信された所定のコンテンツデータを、記録再生装置により着脱自在なデータ格納装置に記録再生する記録再生システムにおいて、
上記情報送信装置は、
上記コンテンツデータを所定のコンテンツ鍵で暗号化するコンテンツ暗号手段と、
上記コンテンツ鍵及び当該コンテンツ鍵で暗号化された上記コンテンツデータを送信する送信手段とを具え、
上記記録再生装置は、
上記情報送信装置から送信された上記コンテンツ鍵及び当該コンテンツ鍵で暗号化された上記コンテンツデータを受信する受信手段と、
受信した上記コンテンツ鍵及び当該コンテンツ鍵で暗号化された上記コンテンツデータを上記データ格納装置に送出して記録させ、又は上記データ格納装置から上記コンテンツ鍵及び当該コンテンツ鍵で暗号化された上記コンテンツデータを再生させて読み出す記録再生制御手段とを具え、
上記データ格納装置は、
所定の記録媒体と、
所定の保存鍵を保持する保存鍵保持手段と、
上記コンテンツ鍵を上記保存鍵で暗号化するコンテンツ鍵暗号手段と、
上記保存鍵で暗号化された上記コンテンツ鍵及び当該コンテンツ鍵で暗号化された上記コンテンツデータを上記記録媒体に記録し、又は当該記録媒体から上記保存鍵で暗号化された上記コンテンツ鍵及び当該コンテンツ鍵で暗号化された上記コンテンツデータを再生する記録再生手段と、
上記保存鍵で暗号化された上記コンテンツ鍵を当該保存鍵で復号化するコンテンツ鍵復号手段とを具える
ことを特徴とする記録再生システム。
【請求項２】
上記データ格納装置において、上記保存鍵保持手段は、耐タンパ性を有する
ことを特徴とする請求項１に記載の記録再生システム。
【請求項３】
上記記録再生装置は、
上記データ格納装置から読み出した、上記コンテンツ鍵で暗号化された上記コンテンツデータを当該コンテンツ鍵を用いて復号化するコンテンツ復号手段
を具えることを特徴とする請求項１に記載の記録再生システム。
【請求項４】
上記データ格納装置の上記記録媒体から上記コンテンツ鍵及び当該コンテンツ鍵で暗号化された上記コンテンツデータを再生させて読み出す再生制御手段を有し、上記データ格納装置が着脱自在に装填される再生装置
を具えることを特徴とする請求項１に記載の記録再生システム。
【請求項５】
所定の記録媒体を有するデータ格納装置が着脱自在に設けられた記録再生装置において、
所定のコンテンツ鍵で暗号化したコンテンツデータと、当該コンテンツ鍵とを上記データ格納装置に送出し、当該データ格納装置固有の所定の保存鍵を用いて上記コンテンツ鍵を暗号化し、当該保存鍵で暗号化した上記コンテンツ鍵及び当該コンテンツ鍵で暗号化した上記コンテンツデータを上記記録媒体に記録させると共に、上記記録媒体から上記保存鍵で暗号化した上記コンテンツ鍵及び当該コンテンツ鍵で暗号化した上記コンテンツデータを再生させ、上記保存鍵で暗号化した上記コンテンツ鍵を当該保存鍵を用いて復号化し、得られた当該コンテンツ鍵及び上記コンテンツ鍵で暗号化した上記コンテンツデータを上記データ格納装置から読み出す記録再生制御手段
を具えることを特徴とする記録再生装置。
【請求項６】
上記データ格納装置から読み出した、上記コンテンツ鍵で暗号化された上記コンテンツデータを当該コンテンツ鍵を用いて復号化するコンテンツ復号手段
を具えることを特徴とする請求項５に記載の記録再生装置。
【請求項７】
所定の記録媒体を有するデータ格納装置が着脱自在に設けられた再生装置において、
上記記録媒体に予め記録された、所定のコンテンツ鍵で暗号化されたコンテンツデータと、上記データ格納装置固有の所定の保存鍵で暗号化された上記コンテンツ鍵とを再生させ、上記保存鍵で暗号化された上記コンテンツ鍵を当該保存鍵を用いて復号化し、得られた当該コンテンツ鍵及び上記コンテンツ鍵で暗号化された上記コンテンツデータを上記データ格納装置から読み出す再生制御手段
を具えることを特徴とする再生装置。
【請求項８】
記録及び又は再生装置に着脱自在に設けられ、当該記録及び又は再生装置の制御のもとに、所定のデータを記録及び又は再生するデータ格納装置において、
所定の記録媒体と、
所定の保存鍵を保持する保存鍵保持手段と、
上記記録及び又は再生装置との間で、所定のコンテンツ鍵で暗号化した所定のコンテンツデータと、当該コンテンツ鍵とを送受信する通信手段と、
上記記録及び又は再生装置の制御のもとに、上記コンテンツ鍵を上記保存鍵で暗号化するコンテンツ鍵暗号手段と、
上記記録及び又は再生装置の制御のもとに、上記保存鍵で暗号化された上記コンテンツ鍵及び当該コンテンツ鍵で暗号化された上記コンテンツデータを上記記録媒体に記録し、又は、当該記録媒体から上記保存鍵で暗号化された上記コンテンツ鍵及び当該コンテンツ鍵で暗号化された上記コンテンツデータを再生する記録再生手段と、
上記記録及び又は再生装置の制御のもとに、上記保存鍵で暗号化された上記コンテンツ鍵を当該保存鍵を用いて復号化するコンテンツ鍵復号手段と
を具えることを特徴とするデータ格納装置。
[Claims]
[Claim 1]
In a recording / playback system in which predetermined content data transmitted from an information transmitting device is recorded / played back in a detachable data storage device by a recording / playback device.
The above information transmission device
A content encryption method that encrypts the above content data with a predetermined content key,
The content key and a transmission means for transmitting the content data encrypted with the content key are provided.
The above recording / playback device
A receiving means for receiving the content key transmitted from the information transmitting device and the content data encrypted with the content key, and
The received content key and the content data encrypted with the content key are sent to the data storage device for recording, or the content key and the content data encrypted with the content key are encrypted from the data storage device. Equipped with a recording / playback control means for replaying and reading
The above data storage device
With a predetermined recording medium
A storage key holding means that holds a predetermined storage key,
A content key encryption method that encrypts the content key with the storage key,
The content key encrypted with the storage key and the content data encrypted with the content key are recorded on the recording medium, or the content key and the content encrypted with the storage key from the recording medium. A recording / playback means for playing back the above content data encrypted with a key,
A recording / playback system including a content key decryption means for decrypting the content key encrypted with the storage key with the storage key.
2.
The recording / playback system according to claim 1, wherein in the data storage device, the storage key holding means has tamper resistance.
3.
The above recording / playback device
The recording / playback system according to claim 1, further comprising a content decoding means for decrypting the content data read from the data storage device and encrypted with the content key by using the content key.
4.
A playback device having a playback control means for playing back and reading the content key and the content data encrypted with the content key from the recording medium of the data storage device, and the data storage device is detachably loaded. The recording / playback system according to claim 1, wherein the recording / playback system is provided.
5.
In a recording / playback device in which a data storage device having a predetermined recording medium is detachably provided.
The content data encrypted with the predetermined content key and the content key are sent to the data storage device, the content key is encrypted using the predetermined storage key unique to the data storage device, and the content key is encrypted with the storage key. The encrypted content key and the content data encrypted with the content key are recorded on the recording medium, and the content key encrypted with the storage key and the content data encrypted with the content key from the recording medium. Is reproduced, the content key encrypted with the storage key is decrypted using the storage key, and the obtained content key and the content data encrypted with the content key are read out from the data storage device. control hand stage
A recording / playback device characterized by having a device.
6.
The recording / playback device according to claim 5 , further comprising a content decoding means for decrypting the content data encrypted with the content key read from the data storage device using the content key.
7.
In a playback device in which a data storage device having a predetermined recording medium is detachably provided.
The content data previously recorded on the recording medium and encrypted with the predetermined content key and the content key encrypted with the predetermined storage key unique to the data storage device are reproduced and encrypted with the storage key. It is characterized by having a reproduction control means for decrypting the encrypted content key using the storage key and reading the obtained content key and the content data encrypted with the content key from the data storage device. Playback device.
8.
In a data storage device that is detachably provided on a recording and / or reproducing device and records and / or reproduces predetermined data under the control of the recording / or reproducing device.
With a predetermined recording medium
A storage key holding means that holds a predetermined storage key,
A communication means for transmitting and receiving predetermined content data encrypted with a predetermined content key and the content key between the recording and / or playback device.
A content key encryption means that encrypts the content key with the storage key under the control of the recording and / or playback device.
Under the control of the recording and / or playback device, the content key encrypted with the storage key and the content data encrypted with the content key are recorded on or from the recording medium. A recording / reproducing means for reproducing the content key encrypted with the storage key and the content data encrypted with the content key, and
A data storage device including a content key decryption means for decrypting the content key encrypted with the storage key by using the storage key under the control of the recording and / or playback device. ..
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25366099A JP4296454B2 (en) | 1999-09-07 | 1999-09-07 | Recording / reproducing system, recording / reproducing apparatus, reproducing apparatus, data storage apparatus |
| CNB00801888XA CN1276612C (en) | 1999-09-07 | 2000-09-07 | Contents management system, device, method, and program storage medium |
| US09/831,071 US7353541B1 (en) | 1999-09-07 | 2000-09-07 | Systems and methods for content distribution using one or more distribution keys |
| EP00956997A EP1128598A4 (en) | 1999-09-07 | 2000-09-07 | Contents management system, device, method, and program storage medium |
| KR1020017005735A KR100682290B1 (en) | 1999-09-07 | 2000-09-07 | Contents management system, device, method, and program storage medium |
| PCT/JP2000/006089 WO2001019017A1 (en) | 1999-09-07 | 2000-09-07 | Contents management system, device, method, and program storage medium |
| US12/068,674 US20080154633A1 (en) | 1999-09-07 | 2008-02-08 | Systems and methods for content distribution including resending data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25366099A JP4296454B2 (en) | 1999-09-07 | 1999-09-07 | Recording / reproducing system, recording / reproducing apparatus, reproducing apparatus, data storage apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2001076425A JP2001076425A (en) | 2001-03-23 |
| JP2001076425A5 true JP2001076425A5 (en) | 2006-05-11 |
| JP4296454B2 JP4296454B2 (en) | 2009-07-15 |
Family
ID=17254419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25366099A Expired - Fee Related JP4296454B2 (en) | 1999-09-07 | 1999-09-07 | Recording / reproducing system, recording / reproducing apparatus, reproducing apparatus, data storage apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4296454B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1507261B1 (en) * | 2001-08-08 | 2016-07-20 | Panasonic Intellectual Property Management Co., Ltd. | Copyright protection system, recording device, decryption device, and recording medium |
| JP4717398B2 (en) * | 2004-09-10 | 2011-07-06 | キヤノン株式会社 | Method for controlling data processing apparatus |
| JP4685512B2 (en) * | 2005-05-31 | 2011-05-18 | 川崎マイクロエレクトロニクス株式会社 | Arithmetic processing unit |
| JP2008257847A (en) * | 2008-04-03 | 2008-10-23 | Hitachi Ltd | Digital broadcasting signal receiving method |
-
1999
- 1999-09-07 JP JP25366099A patent/JP4296454B2/en not_active Expired - Fee Related
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