Recording device and method, reproducing device and method, and storage medium

• US 20030012375A1
• Filed: 07/03/2002
• Published: 01/16/2003
• Est. Priority Date: 11/06/2000
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sako, Yoichiro, Furukawa, Shunsuke, Inokuchi, Tatsuya, Kihara, Takashi
• Granted Patent: US 7,448,086 B2
• Time in Patent Office: Days
• US Class Current: 380/59
• 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 20/00202 wherein the copy protection scheme builds on multi-session recording, e.g. defective table of contents [TOC] in the 2nd session
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00224 wherein the key is obtained from a remote server
• CPC Class Codes: G11B 20/00304 the key being stored in the lead-in area [LIA]
• CPC Class Codes: G11B 20/00311 the key being stored in the lead-out area [LOA]
• CPC Class Codes: G11B 20/00449 content scrambling system [CSS]
• CPC Class Codes: G11B 20/00521 wherein each session of a multisession recording medium is encrypted with a separate encryption key
• CPC Class Codes: G11B 20/0063 wherein the modification to the logical format mainly concerns management data, e.g., by changing the format of the TOC or the subcode
• CPC Class Codes: G11B 20/00746 wherein the usage restriction can be expressed as a specific number
• CPC Class Codes: G11B 20/00753 wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
• 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 20/00797 wherein the usage restriction limits the number of times a content can be reproduced, e.g. using playback counters
• 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 20/1217 on discs

Abstract

Data areas AR1 and AR2, lead-in areas LIN1 and LIN2, and lead-out areas LOUT1 and LOUT2 are provided on a disc. For example, in case of encrypting and recording data into the data area AR2, copyright management information R2 and key information K2 are recorded into the lead-out area LOUT2. Only information in a Q channel of a subcode is recorded in the lead-out area and this area is filled with dummy data. A position of the lead-out is obtained from TOC information. The fact that a light spot has entered the lead-out area can be judged from the information in the Q channel. The copyright management information and key information are recorded by using the lead-out area. The lead-out area is not rewritten or accessed by an ordinary CD player, so that the copyright management information and the key information can be safely held.

Claims

1. A recording apparatus comprising:

input means for inputting encryption data; and

recording means for recording said encryption data which is inputted into a data area on a memory medium having the data area, a lead-in area, and a lead-out area and recording additional information corresponding to said encryption data into said lead-out area.

2. A recording apparatus according to claim 1, wherein

said recording means records the additional information as copyright management information for restricting reproduction/copy of said encryption data into said lead-out area.

3. A recording apparatus according to claim 1, wherein

said recording means records the additional information as a decrypting key for decrypting said encryption data into said lead-out area.

4. A recording apparatus according to claim 1, wherein

as said additional information, said recording means records a version number of a decrypting key for decrypting said encryption data, the number of said decrypting keys, the decrypting keys of the number as many as said decrypting keys, the number of copyright management information for restricting reproduction/copy of said encryption data, the copyright management information of the number as many as said copyright management information, and a CRC code.

5. A recording apparatus comprising:

input means for inputting encryption data; and

recording means for recording said encryption data which is inputted into data areas on a memory medium having the plurality of data areas, a plurality of lead-in areas, and a plurality of lead-out areas and recording additional information corresponding to said encryption data into one of said plurality of lead-in areas or one of said plurality of lead-out areas.

6. A recording apparatus according to claim 5, wherein

said memory medium has a first data area and a second data area on the inner rim side and, further, has a first lead-in area on the inner rim side of said first data area, a first lead-out area on the outer rim side of said first data area, a second lead-in area on the inner rim side of said second data area, and a second lead-out area on the outer rim side of said second data area, and

said recording means records said encryption data into said second data area and records said additional information into at least one of said second lead-in area and said second lead-out area.

7. A recording apparatus according to claim 6, wherein

said recording means records the additional information as copyright management information for restricting reproduction/copy of said encryption data into at least one of said second lead-in area and said second lead-out area.

8. A recording apparatus according to claim 7, wherein

said recording means records the additional information as a decrypting key for decrypting said encryption data into at least one of said second lead-in area and said second lead-out area.

9. A recording apparatus according to claim 8, wherein

said recording means records said copyright management information and said decrypting key into said second lead-out area.

10. A recording apparatus according to claim 8, wherein

said recording means records said copyright management information and said decrypting key into said second lead-out area.

11. A recording apparatus according to claim 8, wherein

said recording means records said copyright management information and said decrypting key into each of said second lead-in area and said second lead-out area.

12. A recording apparatus according to claim 8, wherein

said recording means records a part of said copyright management information and said decrypting key into said second lead-in area and records the other part into said second lead-out area.

13. A recording apparatus according to claim 12, wherein

said recording means records one of said copyright management information and said decrypting key into said second lead-in area and records the other into said second lead-out area.

14. A recording apparatus according to claim 8, wherein

said recording means records said encryption data into said first data area and records said additional information into at least one of said first lead-in area and said first lead-out area.

15. A recording apparatus according to claim 14, wherein

said recording means records said copyright management information and said decrypting key into said first lead-out area.

16. A recording apparatus according to claim 14, wherein

said recording means records said copyright management information and said decrypting key into said first lead-out area.

17. A recording apparatus according to claim 14, wherein

said recording means records said copyright management information and said decrypting key into each of said first lead-in area and said first lead-out area.

18. A recording apparatus according to claim 14, wherein

said recording means records a part of said copyright management information and said decrypting key into said first lead-in area and records the other part into said first lead-out area.

19. A recording apparatus according to claim 18, wherein

said recording means records one of said copyright management information and said decrypting key into said first lead-in area and records the other into said first lead-out area.

20. A reproducing apparatus comprising:

reading means for reading out said stored encryption data from a data area on a,memory medium having the data area, a lead-in area, and a lead-out area and reading out additional information stored in said lead-out area; and

reproducing means for reproducing said encryption data in accordance with said read-out additional information.

21. A reproducing apparatus according to claim 20, wherein

said reproducing means has reproduction restricting means for restricting reproduction/copy of said encryption data in accordance with copyright management information as said additional information.

22. A reproducing apparatus according to claim 20, wherein

said reproducing means further has decrypting means for decrypting said encryption data in accordance with a decrypting key for decrypting said encryption data as said additional information and reproduces said decrypted data.

23. A reproducing apparatus according to claim 20, wherein

as said additional information, said reproducing means reproduces a version number of a decrypting key for decrypting said encryption data, the number of said decrypting keys, the decrypting keys of the number as many as said decrypting keys, the number of copyright management information for restricting reproduction/copy of said encryption data, the copyright management information of the number as many as said copyright management information, and a CRC code.

25. A reproducing apparatus according to claim 24, wherein

said memory medium has a first data area and a second data area on the inner rim side and, further, has a first lead-in area on the inner rim side of said first data area, a first lead-out area on the outer rim side of said first data area, a second lead-in area on the inner rim side of said second data area, and a second lead-out area on the outer rim side of said second data area,

said reading means reads out said additional information from at least one of said second lead-in area and said second lead-out area, and

said reproducing means reproduces said encryption data which is recorded in said second data area in accordance with said additional information.

26. A reproducing apparatus according to claim 25, wherein

said reading means reads out the additional information as copyright management information for restricting reproduction/copy of said encryption data from at least one of said second lead-in area and said second lead-out area.

27. A reproducing apparatus according to claim 26, wherein

said reading means reads out the additional information as a decrypting key for decrypting said encryption data from at least one of said second lead-in area and said second lead-out area.

28. A reproducing apparatus according to claim 27, wherein

said reading means reads out said copyright management information and said decrypting key from said second lead-out area.

29. A reproducing apparatus according to claim 27, wherein

said reading means reads out said copyright management information and said decrypting key from said second lead-out area.

30. A reproducing apparatus according to claim 27, wherein

said reading means reads out said copyright management information and said decrypting key from each of said second lead-in area and said second lead-out area.

31. A reproducing apparatus according to claim 27, wherein

said reading means reads out a part of said copyright management information and said decrypting key from each of said second lead-in area and reads out the other part from said second lead-out area.

32. A reproducing apparatus according to claim 31, wherein

said reading means reads out one of said copyright management information and said decrypting key from said second lead-in area and reads out the other from said second lead-out area.

33. A reproducing apparatus according to claim 27, wherein

said reading means reads out said additional information from at least one of said first lead-in area and said first lead-out area, and

said reproducing means reproduces said encryption data which is recorded into said first data area in accordance with said additional information.

34. A reproducing apparatus according to claim 33, wherein

said reading means reads out said copyright management information and said decrypting key from said first lead-out area.

35. A reproducing apparatus according to claim 33, wherein

said reading means reads out said copyright management information and said decrypting key from said first lead-out area.

36. A reproducing apparatus according to claim 33, wherein

said reading means reads out said copyright management information and said decrypting key from each of said first lead-in area and said first lead-out area.

37. A reproducing apparatus according to claim 33, wherein

said reading means reads out a part of said copyright management information and said decrypting key from said first lead-in area and reads out the other part from said first lead-out area.

38. A reproducing apparatus according to claim 37, wherein

said reading means reads out one of said copyright management information and said decrypting key from said first lead-in area and reads out the other from said first lead-out area.

24. A reproducing apparatus comprising:

reading means for reading out encryption data from one of a plurality of data areas on a memory medium having the plurality of data areas, a plurality of lead-in areas, and a plurality of lead-out areas and reading out additional information corresponding to said encryption data from one of said plurality of lead-in areas or one of said plurality of lead-out areas; and

reproducing means for reproducing said encryption data in accordance with said read-out additional information.

39. A recording method comprising the steps of:

inputting encryption data;

recording said encryption data which is inputted into a data area on a memory medium having the data area, a lead-in area, and a lead-out area; and

recording additional information corresponding to said encryption data into said lead-out area.

40. A recording method comprising the steps of:

inputting encryption data;

recording said encryption data which is inputted into data areas on a memory medium having the plurality of data areas, a plurality of lead-in areas, and a plurality of lead-out areas; and

recording additional information corresponding to said encryption data into one of said plurality of lead-in areas or one of said plurality of lead-out areas.

41. A reproducing method comprising the steps of:

reading out said stored encryption data from a data area on a memory medium having the data area, a lead-in area, and a lead-out area;

reading out additional information stored in said lead-out area; and

reproducing said encryption data in accordance with said read-out additional information.

42. A reproducing method according to claim 41, wherein

reproduction of said encryption data is restricted in accordance with said read-out additional information.

43. A reproducing method according to claim 41, wherein

said encryption data is decrypted in accordance with said read-out additional information, and said decrypted data is reproduced.

44. A reproducing method comprising the steps of:

reading out encryption data from one of a plurality of data areas on a memory medium having the plurality of data areas, a plurality of lead-in areas, and a plurality of lead-out areas;

reading out additional information corresponding to said encryption data from one of said plurality of lead-in areas or one of said plurality of lead-out areas; and

reproducing said encryption data in accordance with said read-out additional information.

45. A reproducing method according to claim 44, wherein

reproduction of said encryption data is restricted in accordance with said read-out additional information.

46. A reproducing method according to claim 44, wherein

said encryption data is decrypted in accordance with said read-out additional information, and said decrypted data is reproduced.

48. A memory medium according to claim 47, wherein

said additional information is copyright management information for restricting reproduction/copy of said encryption data.

49. A memory medium according to claim 47, wherein

as said additional information, additional information as a decrypting key for decrypting said encryption data is recorded into said lead-out area.

47. A memory medium

which has a data area, a lead-in area, and a lead-out area and

in which encryption data is recorded into said data area and

additional information corresponding to said encryption data is recorded into said lead-out area.

50. A memory medium

which has a plurality of data areas, a plurality of lead-in areas, and a plurality of lead-out areas and

in which said encryption data which is inputted into said data areas is recorded and additional information corresponding to said encryption data is recorded into one of said plurality of lead-in areas or one of said plurality of lead-out areas.

51. A memory medium according to claim 50, wherein

said additional information is copyright management information for restricting reproduction/copy of said encryption data.

52. A memory medium according to claim 50, wherein

as said additional information, additional information as a decrypting key for decrypting said encryption data is recorded into said lead-out area.