Recording apparatus, reproduction apparatus, data processing apparatus, recording and reproduction apparatus and data transmission apparatus and corresponding methods

• US 7,706,531 B2
• Filed: 12/26/2000
• Issued: 04/27/2010
• Est. Priority Date: 12/28/1999
• Status: Expired due to Fees

• Current Assignee: Godo Kaisha IP Bridge 1 (IP Bridge, Inc.)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Yoshida, Shuichi, Kuno, Yoshiki, Kubo, Noriaki, Shimizu, Ryosuke, Komeno, Jyun-ichi, Koudo, Toshikazu, Okada, Takanori
• Primary Examiner(s): Korzuch; William R
• Assistant Examiner(s): AVERY, JEREMIAH L
• Application Number:
  US10/169,052
• Publication Number:
  US 20030120942A1
• Time in Patent Office: 3,409 Days
• Field of Search: 713/193, 705/56, 705/57, 380/201
• US Class Current: 380/201
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00188 involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00246 wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder
• CPC Class Codes: G11B 20/00492 wherein content or user data is encrypted
• CPC Class Codes: G11B 20/00666 involving a step of erasing or nullifying data, e.g. data being overwritten with a random string
• CPC Class Codes: G11B 20/0071 involving a purchase action
• CPC Class Codes: G11B 20/00746 wherein the usage restriction can be expressed as a specific number
• CPC Class Codes: G11B 20/00768 wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
• CPC Class Codes: G11B 20/0084 wherein the usage restriction can be expressed as a specific time or date
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 20/12 Formatting, e.g. arrangement of data block or words on the record carriers within interface between computers and data recorders G06F3/06
• CPC Class Codes: G11B 2220/2516 Hard disks
• CPC Class Codes: H04N 2005/91307 by adding a copy protection signal to the video signal
• CPC Class Codes: H04N 2005/91321 the copy protection signal being a copy protection control signal, e.g. a record inhibit signal
• CPC Class Codes: H04N 2005/91328 the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]
• CPC Class Codes: H04N 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 21/4147 PVR [Personal Video Recorder] H04N5/76 takes precedence ; arrangements for broadcast with accumulation-type receivers H04H20/40
• CPC Class Codes: H04N 21/42661 for reading from or writing on a magnetic storage medium, e.g. hard disk drive
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/43622 : Interfacing an external recording device
• CPC Class Codes: H04N 21/4405 : involving video stream decryption
• CPC Class Codes: H04N 21/4623 : Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message] arrangements for conditional access to broadcast information or to broadcast-related services H04H60/14
• CPC Class Codes: H04N 5/765 : Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/781 : on disks or drums
• CPC Class Codes: H04N 5/85 : on discs or drums
• CPC Class Codes: H04N 5/913 : for scrambling ; for copy protection
• CPC Class Codes: H04N 7/163 : by receiver means only
• CPC Class Codes: H04N 7/1675 : Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58
• CPC Class Codes: H04N 9/8042 : involving data reduction

Abstract

An encryptor is provided for encrypting AV data sent from an interface. A controller controls recording of the encrypted AV data by controlling a recorder for recording the encrypted AV data in a magnetic disk. The recorder is controlled by the controller so as to reproduce the data recorded on the disk. A decrypter decrypts the reproduced data that is sent to the interface.

Claims

1. A recording apparatus comprising:

an encryption means of encrypting data by using recording apparatus specific information, the recording apparatus specific information being used for encryption and decryption performed within said recording apparatus, and not being used outside of said recording apparatus;

control means of controlling said encrypted data to be recorded;

recording means controlled by said control means of recording said encrypted data on a disk;

wherein;

said recording means is operable to record said encrypted data on the disk in which a plurality of recording blocks are provided, the recording blocks being divided into a header portion and a data portion;

said encryption means is operable to encrypt data recorded in the header portion and the data portion to provide a unique recording format which restricts the encrypted data to be played back only on said recording apparatus.

14. A reproduction apparatus wherein:

control means of controlling encrypted data recorded on a disk by means of a recording apparatus according to claim 1 to be reproduced;

reproduction means, which is controlled by said control means, of reproducing said data; and

decryption means of decrypting said reproduced data by using recording apparatus specific information.

20. A reproduction apparatus according to any of claims 14, 15, 16, or 17, wherein an interface to which reproduced data is sent, said decryption means and said control means are integrated and provided on the same printed circuit board.

21. A reproduction apparatus according to claim 20, wherein said interface, said decryption means and said control means are integrated in one chip.

23. A reproduction apparatus according to claim 20, wherein a signal detected from a terminal on said printed circuit board that outputs a signal that can be reproduced as data by a third party is entirely encrypted and/or is inscribed in an undisclosed format.

25. A reproduction apparatus according to claim 20, wherein the property of a terminal on said printed circuit board that outputs a signal that can be reproduced as data by a third party is defined according to an undisclosed format.

31. A reproduction apparatus according to any of claims 14, 15, 16, 17, wherein:

copy permission information is added to said encrypted data that is recorded; and

said control means controls said reproduction means to reproduce said data at least one time in the case that said copy permission information of said data represents “

Copy Never”

according to a predetermined condition.

32. A reproduction apparatus according to claim 31, wherein said predetermined condition is the case wherein said recorded data becomes unreproducible after a predetermined period of time.

33. A reproduction apparatus according to claim 31, wherein said predetermined condition is the case wherein said recorded data becomes unreproducible according of fee imposition conditions.

34. A reproduction apparatus according to any of claims 14, 15, 16, 17, wherein:

copy permission information is added to said encrypted data that is recorded; and

said control means controls said reproduction means to copy and to output said data only once so as to allow said copy permission information of said data, after being once copied by means of said recording means, to permit copying only one additional time (copy once) in the case that said copy permission information of said data represents the permission of copying only one (copy once) according to a predetermined condition.

35. A reproduction apparatus according to claim 34, wherein said predetermined condition is the case wherein said data or the key used for encrypting said data are erased after a predetermined period of time has elapsed since said reproduction means has copied and outputted said data.

36. A reproduction apparatus according to claim 34, characterized in that said predetermined condition is the case wherein a recorder of said data that has been only once copied and outputted is an apparatus for recording said data as a backup.

37. A reproduction apparatus according to claim 36, wherein said data recorded as a backup in said recorder is unreproducible from said recorder.

38. A reproduction apparatus according to claim 36, wherein said data recorded as a backup in said recorder is unreproducible unless said data is returned to the original reproduction apparatus.

2. A recording apparatus comprising:

an encryption means of encrypting data;

a control means of controlling said encrypted data to be recorded;

a recording means controlled by said control means of recording said encrypted data on a disk in which a plurality of recording blocks are provided,

wherein said encryption means encrypts said data by using recording unit information that is a numeral and/or a symbol specific to respective recording blocks each corresponding to a recording unit that is a minimum unit for said control means to sequentially access said recording means,

the recording unit information is assigned to each of the recording blocks, and the recording unit information assigned to different recording blocks are different from each other,

said recording blocks, provided in the disk on which said recording means is operable to record said encrypted data, is divided into a header portion and a data portion; and

said encryption means is operable to encrypt data recorded in the header portion and the data portion to provide a unique recording format which restricts the encrypted data to be played back only on said recording apparatus.

3. A recording apparatus according to claim 2, wherein the encryption of said data by using said recording unit information indicates the encryption of said data by using a key gained based on said recording unit information.

4. A recording apparatus according to claim 2, wherein at least said encrypted data recorded in said recording block and additional information added to said encrypted data are encrypted in the entire portion and are recorded in said recording means.

5. A recording apparatus according to claim 2, wherein:

copy permission information is added to said data;

said control means controls said recording means to record said copy permission information;

said encryption means generates first information that includes at least either a device unique key that is a numeric value and/or a symbol allocated to, and specific to, said recording apparatus, or said copy permission information;

said encryption means generates, by using said recording unit information, a content key that is information gained by encrypting said first information;

said encryption means encrypts said data by using said content key; and

said control means controls said recording means to record said encrypted data.

15. A reproduction apparatus comprising:

control means of controlling encrypted data recorded on a disk by means of a recording apparatus according to claim 2 to be reproduced;

reproduction means, that is controlled by said control means, of reproducing said data; and

decryption means of decrypting said reproduced data, wherein said decryption means decrypts said reproduced data by using said recording unit information.

16. A reproduction apparatus comprising:

control means of controlling encrypted data recorded on a disk by means of a recording apparatus according to claim 3 to be reproduced;

reproduction means, that is controlled by said control means, of reproducing said data; and

decryption means of decrypting said reproduced data,

wherein said decryption means decrypts said reproduced data by using a key gained based on said recording unit information.

6. A recording apparatus comprising:

an encryption means of encrypting data;

a control means of controlling said encrypted data to be recorded;

a recording means controlled by said control means of recording said encrypted data on a disk,

wherein a title key that is a numeric value and/or a symbol is allocated to said data;

said encryption means encrypts said title key by using a device unique key that is a numeric value and/or a symbol allocated to, and specific to, said recording apparatus, the device unique key being used for encryption and decryption performed within said recording apparatus, and not being used outside of said recording apparatus;

said control means controls said recording means so that said encrypted title key is recorded in said recording means;

said recording means is operable to record said encrypted data on the disk in which a plurality of recording blocks are provided, the recording blocks being divided into a header portion and a data portion; and

said encryption means is operable to encrypt said title key and data recorded in the header portion and the data portion to provide a unique recording format which restricts the encrypted data to be played back only on said recording apparatus.

7. A recording apparatus according to claim 6, wherein said encryption means encrypts said data by using said title key.

8. A recording apparatus according to claim 7, wherein:

said control means controls said recording means to record said encrypted title key;

said encryption means generates third information that includes said title key;

said encryption means generates a content key, which is information gained by encrypting said third information, by using recording unit information that is a numeral and/or a symbol specific to a recording block based on a recording unit that is a minimum unit for said control means to sequentially access said recording means;

said encryption means encrypts said data by using said content key; and

said control means controls said recording means to record said encrypted data.

9. A recording apparatus according to claim 7, wherein:

copy permission information is added to said data; and

said encryption means encrypts said data by using said copy permission information.

10. A recording apparatus according to claim 9, wherein:

said control means controls said recording means to record said encrypted title key;

said control means controls said recording means to record said copy permission information;

said encryption means generates second information that includes at least either said title key or said copy permission information;

said encryption means generates a content key that is information gained by encrypting said second information by using recording unit information that is a numeral and/or a symbol specific to a recording block based on a recording unit that is a minimum unit for said control means to sequentially access said recording means;

said encryption means encrypts said data by using said content key; and

said control means controls said recording means to record said encrypted data.

11. A recording apparatus according to claim 6, wherein:

said encryption means encrypts data to which copy permission information is attached by using said copy permission information; and

said control means controls said recording means to record said copy permission information before and/or after said recording means records said data.

12. A recording apparatus according to claim 11, wherein said control means controls said recording means to record said copy permission information before, at least, said recording means records said data.

13. A recording apparatus according to claim 11, wherein said control means controls said recording means to record said copy permission information only after said recording means records said data.

17. A reproduction apparatus comprising:

control means of controlling encrypted data recorded on a disk by means of a recording apparatus according to claim 13 to be reproduced;

reproduction means, which is controlled by said control means, of reproducing said data; and

decryption means of decrypting said reproduced data,

wherein said decryption means attempts to decrypt the entirety of, or a portion of said encrypted data by assuming that said copy permission information has a variety of values in the case that said copy permission information cannot be recorded in a normal manner in said recording means at the time when said data is recorded, and

wherein said reproduced data is decrypted by using the value of said copy permission information in the case that said reproduced data can be decrypted in a normal manner as a result of said attempts.

18. A recording apparatus according to claim 6, wherein an interface from which data is sent, said encryption means and said control means are integrated and provided on the same printed circuit board.

19. A recording apparatus according to claim 18, wherein said interface, said encryption means and said control means are integrated in one chip.

22. A recording apparatus according to claim 18, wherein a signal detected from a terminal on said printed circuit board that outputs a signal that can be reproduced as data by a third party is entirely encrypted and/or is inscribed in an undisclosed format.

24. A recording apparatus according to claim 18, wherein the property of a terminal on said printed circuit board that outputs a signal that can be reproduced as data by a third party is defined according to an undisclosed format.

26. A recording apparatus according to claim 6, wherein said device unique key cannot be accessed by an external device.

27. A recording apparatus according to any of claims 5, 9, 10, 11, 12 and 13, wherein said copy permission information is recorded in a system region that cannot be directly accessed by a user of said recording means.

28. A recording apparatus according to claim 6 wherein:

copy permission information is added to the data; and

said control means can control said recording means to record said data even in the case that said copy permission information of said data represents “

Copy Never”

according to a predetermined condition.

29. A recording apparatus according to claim 28, wherein said predetermined condition is the case wherein said recorded data becomes unreproducible after a predetermined period of time.

30. A recording apparatus according to claim 28, wherein said predetermined condition is the case wherein said recorded data becomes unreproducible according to fee imposition conditions.

39. A recording apparatus according to claim 6, wherein said encryption means encrypts data regardless of the value of the copy permission information of said data sent from said interface.

40. A recording apparatus according to claim 6, wherein:

said encryption means does not encrypt said data in the case that copy permission information of the data represents that the data can be freely copied (copy free); and

said control means controls said recording means to record said unencrypted data.

41. An LSI chip comprising:

an encryption means of encrypting data;

a control means of controlling said encrypted data to be recorded;

a recording means controlled by said control means of recording said encrypted data on a disk in which a plurality of recording blocks are provided,

wherein said encryption means encrypts said data by using recording unit information that is a numeral and/or a specific to respective recording blocks each corresponding to a recording unit that is a minimum unit for said control means to sequentially access said recording means,

the recording unit information is assigned to each of the recording blocks and the recording unit information assigned to different recording blocks are different from each other,

said recording blocks, provided in the disk on which said recording means is operable to record said encrypted data, is divided into a header portion and a data portion;

said encryption means is operable to encrypt data recorded in the header portion and the data portion to provide a unique recording format which restricts the encrypted data to be played back only on said LSI chip.

42. An LSI chip comprising:

an encryption means of encrypting data;

a control means of controlling said encrypted data to be recorded;

a recording means controlled by said control means of recording said encrypted data on a disk,

wherein a title key that is a numeric value and/or a symbol is allocated to said data;

said encryption means encrypts said title key by using a device unique key that is a numeric value and/or a symbol allocated to, and specific to, a recording apparatus, the device unique key being used for encryption and decryption performed within said recording apparatus, and not being used outside of said recording apparatus;

said control means controls said recording means so that said encrypted title key is recorded in said recording means;

wherein said recording means is operable to record said encrypted data on the disk in which a plurality of recording blocks are provided, the recording blocks being divided into a header portion and a data portion; and

said encryption means is operable to encrypt said title key and data recorded in the header portion and the data portion to provide a unique recording format which restricts the encrypted data to be played back only on said LSI chip.

43. A recording apparatus comprising:

a controller operable to encrypt data by using recording apparatus specific information, the recording apparatus specific information being used for encryption and decryption performed within said recording apparatus, and not being used outside of said recording apparatus;

a memory operable to store the encrypted data;

said controller is operable to control said memory to store the encrypted data;

wherein;

said controller is operable to store said encrypted data in the memory provided with a plurality of recording blocks, the recording blocks being divided into a header portion and a data portion; and

said controller is operable to encrypt data recorded in the header portion and the data portion to provide a unique recording format which restricts the encrypted data to be played back only on said recording apparatus.

44. The recording apparatus according to claim 43, wherein said controller includes an encryptor that receives the recording apparatus specific information and encrypts the data by using the recording apparatus specific information.

45. The recording apparatus according to claim 43, wherein said recording apparatus specific information is recording unit information that is a numeral and/or a symbol specific to a recording block in said memory.

46. The recording apparatus according to claim 43, wherein said recording apparatus specific information is a device unique key that is a numeric value and/or a symbol allocated to, and specific to, said recording apparatus.

47. A recording apparatus comprising:

an encryption means of encrypting data, the data including a title key that is a numeric value and/or a symbol, and a copy permission information;

a control means of controlling said encrypted data to be recorded;

a recording means controlled by said control means of recording said encrypted data on a disk in which a plurality of recording blocks are provided;

wherein said encryption means generates key information using said title key and said copy permission information;

said encryption means generates a contents key that is information gained by encrypting said key information with a recording unit information which is a numeral and/or a symbol specific to respective recording blocks each corresponding to a recording unit that is a minimum unit for said control means to sequentially access said recording means;

said encryption means encrypts said data using said contents key which changes on a recording block by recording block basis;

the recording unit information is assigned to each of the recording blocks, and the recording unit information assigned to different recording blocks are different from each other;

said recording blocks, provided in the disk on which said recording means is operable to record said encrypted data, is divided into a header portion and a data portion; and

said encryption means is operable to encrypt data recorded in the header portion and the data portion to provide a unique recording format which restricts the encrypted data to be played back only on said recording apparatus.