Information recording/reproducing system

• US 6,999,587 B1
• Filed: 02/07/2000
• Issued: 02/14/2006
• Est. Priority Date: 02/08/1999
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Asano, Tomoyuki, Osawa, Yoshitomo
• Primary Examiner(s): Smithers, Matthew
• Assistant Examiner(s): Callahan, Paul E.
• Application Number:
  US09/647,961
• Time in Patent Office: 2,199 Days
• Field of Search: 380201-203, 380/285, 380/46, 705 51- 59, 386/94, 360/13, 360/60, 360/15, 369/47.12, 369/47.13, 369/53.12, 369/30.01, 369/30.04, 369/32.01, 713/158, 713/176
• US Class Current: 380/202
• 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 20/00094 involving measures which result in a restriction to authorised record carriers
• CPC Class Codes: G11B 20/00115 wherein the record carrier stores a unique medium identifier
• CPC Class Codes: G11B 20/00123 the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
• CPC Class Codes: G11B 20/00173 wherein the origin of the content is checked, e.g. determining whether the content has originally been retrieved from a legal disc copy or another trusted source
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier

Abstract

An information recording medium 1 is provided with: a user data recording part 3 which records user data; a random-patter-information recording part 4 which records random pattern information from a random physical phenomenon; and an authentication data recording part 5 which records, as authentication data, medium identification information created on the basis of the random pattern information detected from the random-pattern-information recording part 4 and a digital signature for each manufacturer with respect to the medium identification information.

Claims

1. An information recording/playback system for recording and playing back information, comprising:

an authentication data recording control part which provides control of detecting random pattern information based on random physical phenomena from a random-pattern-information recording part used for recording random pattern information based on random physical phenomena, creating medium identification information from the random pattern information, and recording, as authentication data, the medium identification information in an authentication data recording part on the information recording medium;

an authentication processing part which detects the random pattern information from the random-pattern-information recording part, creates medium-identification-information verification data from the random pattern information, reads authentication data from the authentication data recording part on the information recording medium, and performs authentication processing for the information recording medium based on medium-identification-information verification data created from the random pattern information and based on the authentication data; and

an information recording/playback control part which provides control of recording information on an information recording medium and playing back information from an information recording medium based on an authentication result from the authentication processing part;

wherein the authentication data recording control part records, as authentication data, the medium identification information together with a digital signature of a person who recorded the medium identification information in the authentication data recording part on the information recording medium.

2. The information recording/playback system according to claim 1, wherein there is further provided an encryption part which encrypts information by using medium identification information from an information recording medium authenticated by the authentication processing, and

wherein the information recording/playback control part provides control of recording information encrypted by the encryption part on the authenticated information recording medium.

3. The information recording/playback system according to claim 2, wherein the information recording/playback control part provides control of recording encrypted information and control of the encryption key used for information encryption on the authenticated information recording medium.

4. The information recording/playback system according to claim 3, wherein the encryption part encrypts information using the encryption key and encrypts the encryption key used for information encryption by using medium identification information on an information recording medium authenticated by the authentication processing,

wherein the information recording/playback control part provides control of recording information encrypted with the encryption key and the encrypted encryption key on the authenticated information recording medium.

5. The information recording/playback system according to claim 2, wherein the encryption part creates an encryption key used for the information encryption by using medium identification information on an information recording medium authenticated by the authentication processing.

6. The information recording/playback system according to claim 1, wherein there is further provided a decryption part for decrypting information by using medium identification information on an information recording medium authenticated by the authentication processing,

wherein the information recording/playback control part provides control of reading encrypted information from the authenticated information recording medium, and

wherein the decryption part decrypts encrypted information read by the information recording/playback control part from an information recording medium by using medium identification information on an information recording medium authenticated by the authentication processing.

7. The information recording/playback system according to claim 6, characterized in that the information recording/playback control part provides control of reading encrypted information and control of the encryption key used for information encryption from the authenticated information recording medium.

8. The information recording/playback system according to claim 7, wherein the information recording/playback control part provides control of reading encrypted information and the encrypted encryption key from the information recording medium, and

wherein the decryption part decrypts a read and encrypted encryption key by using medium identification information on an information recording medium authenticated by the authentication processing and decrypts encrypted information by using the encryption key which was encrypted and information thereof is decrypted.

9. An information recording/playback system according to claim 1, wherein the authentication data recording control part records a digital signature for a manufacturer of the information recording medium.

10. An information recording apparatus for recording information on an information recording medium including a random-pattern-information recording part for recording random pattern information based on random physical phenomena and an authentication data recording part for storing, as authentication data, medium identification information generated according to random pattern information detected from the random-pattern-information recording part, wherein the information recording apparatus comprises:

a random-pattern-information detection part which detects random pattern information from a random-pattern-information recording part on an information recording medium;

a verification data creation part which creates medium-identification-information verification data from random pattern information detected by the random-pattern-information detection part;

an authentication processing part which reads authentication data from an authentication data recording part on an information recording medium, performs authentication processing for an information recording medium based on medium-identification-information verification data created by the verification data creation part and based on the authentication data, and controls whether to write information onto an information recording medium based on an authentication result; and

a recording control part which provides control of recording information on an information recording medium;

wherein the recording control part provides control of recording encrypted information and control of the encryption key used for information encryption on the authenticated information recording medium.

11. The information recording apparatus according to claim 10, wherein there is further provided an encryption part which encrypts information by using medium identification information on an information recording medium authenticated by the authentication processing, and

wherein the recording control part provides control of recording information encrypted by the encryption part on the authenticated information recording medium.

12. The information recording apparatus according to claim 10, wherein the encryption part encrypts information by using the encryption key and encrypts the encryption key used for information encryption by using medium identification information on an information recording medium authenticated by the authentication processing, and

wherein the recording control part provides control of recording information encrypted with the encryption key and control of the encrypted encryption key on the authenticated information recording medium.

13. The information recording apparatus according to claim 11, characterized in that the encryption part creates an encryption key used for the information encryption by using medium identification information on an information recording medium authenticated by the authentication processing.

14. The information recording apparatus according to claim 10, wherein that the authentication processing part verifies validity of the medium identification information with respect to an information recording medium which records, as authentication data, the medium identification information together with a digital signature of a person who recorded the medium identification information based on the person'"'"'s digital signature, and performs authentication processing with respect to an information recording medium based on medium-identification-information verification data created by the verification data creation part and based on verified valid medium identification information.

15. The information recording apparatus according to claim 14, wherein the authentication processing part verifies validity of the medium identification information with respect to an information recording medium which records a digital signature of a manufacturer for the information recording medium.

16. The information recording apparatus according to claim 14, wherein the authentication processing part performs authentication processing with respect to an information recording medium which records a revocation list together with the authentication data based on the revocation list.

17. The information recording apparatus according to claim 16, wherein the authentication processing part has a storage part for storing the revocation list, stores a revocation list recorded on an information recording medium in the storage part when this revocation list is valid and is newer than the revocation list stored in the storage part, and performs authentication processing based on the revocation list stored in the storage part.

18. An information playback apparatus for playing back information from an information recording medium including a random-pattern-information recording part for recording random pattern information based on random physical phenomena and an authentication data recording part for storing, as authentication data, medium identification information created according to random pattern information detected from the random-pattern-information recording part, wherein the information playback apparatus comprises:

a random-pattern-information detection part which detects random pattern information from the random-pattern-information recording part on the information recording medium;

a verification data creation part which creates medium-identification-information verification data from random-pattern-information detected by the random-pattern-information detection part;

an authentication processing part which reads authentication data from the authentication data recording part and performs authentication processing with respect to an information recording medium based on medium-identification-information verification data created by the verification data creation part and based on the authentication data; and

a playback control part which provides control of reading information from an information recording medium;

wherein the authentication processing part verifies validity of the medium identification information with respect to an information recording medium which records, as authentication data, the medium identification information together with a digital signature of a person who recorded the medium identification information based on the person'"'"'s digital signature, and performs authentication processing with respect to the information recording medium based on medium-identification-information verification data created by the verification data creation part and based on verified valid medium identification information.

19. The information playback apparatus according to claim 18, wherein the playback control part provides control of reading encrypted information from the authenticated information recording medium, and

wherein a decryption part decrypts encrypted information read from the information recording medium by the playback control part by using medium identification information on the information recording medium authenticated by the authentication processing.

20. The information playback apparatus according to claim 19, wherein the playback control part provides control of reading encrypted information and control of an encryption key used for the information encryption from the authenticated information recording medium.

21. The information playback apparatus according to claim 20, wherein the playback control part provides control of reading encrypted information and the encrypted encryption key from the authenticated information recording medium, and

wherein the decryption part decrypts a read and encrypted encryption key by using medium identification information on an information recording medium authenticated by the authentication processing and decrypts encrypted information by using the encryption key which was encrypted and information thereof is decrypted.

22. The information playback apparatus according to claim 18, wherein the authentication processing part verifies validity of the medium identification information with respect to an information recording medium which records a digital signature of a manufacturer for the information recording medium.

23. The information playback apparatus according to claim 18, wherein the authentication processing part performs authentication processing with respect to an information recording medium which records a revocation list together with the authentication data based on the revocation list.

24. The information playback apparatus according to claim 23, wherein the authentication processing part has a storage part for storing the revocation list, stores a revocation list recorded on an information recording medium in the storage part when this revocation list is valid and is newer than the revocation list stored in the storage part, and performs authentication processing based on the revocation list stored in the storage part.

25. An authentication data recording apparatus for recording authentication information on an information recording medium, comprising:

a random-pattern-information detection part which detects random pattern information from a random-pattern-information recording part on an information recording medium for storing random pattern information based on random physical phenomena;

a medium identification information creation part which creates medium identification information from the random pattern information detected by the random-pattern-information detection part; and

an authentication data recording control part which provides control of recording, as authentication data, the medium identification information created by the medium identification information creation part in an authentication data recording part on the information recording medium;

wherein the authentication data recording control part records, as authentication data, the medium identification information together with a digital signature for a person recording the medium identification information in an authentication data recording part on the information recording medium.

26. The authentication data recording apparatus according to claim 25, characterized in that the authentication data recording control part records a digital signature for a manufacturer of the information recording medium.

27. The authentication data recording apparatus according to claim 25, wherein the authentication data recording control part records a revocation list about a manufacturer together with the authentication data in an authentication data recording part on the information recording medium.

28. An authentication processing apparatus for performing authentication processing with respect to an information recording medium, comprising:

a random-pattern-information detection part which detects random pattern information from a random-pattern-information recording part on the information recording medium;

a verification data creation part which creates medium-identification-information verification data from random pattern information detected by the random-pattern-information detection part; and

an authentication processing part which reads authentication data from an authentication data recording part on the information recording medium and performs authentication processing with respect to the information recording medium based on medium-identification-information verification data created by the verification data creation part and based on the authentication data;

wherein the authentication processing part verifies validity of the medium identification information with respect to an information recording medium which records, as authentication data, the medium identification information together with a digital signature of a person who recorded the medium identification information based on the person'"'"'s digital signature, and performs authentication processing with respect to the information recording medium based on medium-identification-information verification data created by the verification data creation part and based on verified valid medium identification information.

29. The authentication processing apparatus according to claim 28, wherein the authentication processing part verifies validity of the medium identification information with respect to an information recording medium which records a digital signature of a manufacturer for the information recording medium.

30. The authentication processing apparatus according to claim 28, wherein the authentication processing part performs authentication processing with respect to an information recording medium which records a revocation list together with the authentication data based on the revocation list.

31. The authentication processing apparatus according to claim 30, wherein the authentication processing part has a storage part for storing the revocation list, stores a revocation list recorded on an information recording medium in the storage part when this revocation list is valid and is newer than the revocation list stored in the storage part, and performs authentication processing based on the revocation list stored in the storage part.

32. The authentication processing apparatus according to claim 30, wherein the authentication processing part has a storage part, stores a recording person'"'"'s identification information and a public key thereof for a manipulated information recording medium together with a revocation flag, updates the revocation flag using a new revocation list, and performs authentication processing based on the revocation list stored in the storage part.

33. An information recording/playback method for recording and playing back information, comprising:

an authentication data recording control process which provides control of detecting random pattern information based on random physical phenomena from a random-pattern-information recording part for recording random pattern information based on random physical phenomena on an information recording medium, creating medium identification information from the random pattern information, and recording, as authentication data, the medium identification information in an authentication data recording part on the information recording medium;

an authentication process which detects the random pattern information from the random-pattern-information recording part, creates medium-identification-information verification data from the random pattern information, reads authentication data from the authentication data recording part on the information recording medium, and performs authentication processing with respect to the information recording medium based on medium-identification-information verification data created from the random pattern information and based on the authentication data; and

an information recording/playback control process which provides control of recording information on an information recording medium and playing back information from an information recording medium based on an authentication result from the authentication processing process;

wherein the authentication data recording control process records, as authentication data, the medium identification information together with a digital signature for a person recording the medium identification information in an authentication data recording part on the information recording medium.

34. The information recording/playback method according to claim 33, wherein there is further provided an encryption process which encrypts information using medium identification information from an information recording medium authenticated by the authentication processing, and

wherein the information recording/playback control process provides control of recording information encrypted by the encryption process on the authenticated information recording medium.

35. The information recording/playback method according to claim 34, wherein the information recording/playback control process provides control of recording encrypted information and control of the encryption key used for information encryption on the authenticated information recording medium.

36. The information recording/playback method according to claim 35, wherein the encryption process encrypts information using the encryption key and encrypts the encryption key used for information encryption using medium identification information on an information recording medium authenticated by the authentication processing, and

wherein the information recording/playback control process provides control of recording information encrypted with the encryption key and control of the encrypted encryption key on the authenticated information recording medium.

37. The information recording/playback method according to claim 34, wherein the encryption process creates the encryption key used for information encryption by using medium identification information on an information recording medium authenticated by the authentication processing.

38. The information recording/playback method according to claim 33, wherein the information recording/playback control process provides control of reading encrypted information from the authenticated information recording medium, and

wherein the decryption process decrypts encrypted information read by the information recording/playback control process from an information recording medium by using medium identification information on an information recording medium authenticated by the authentication processing.

39. The information recording/playback method according to claim 38, wherein the information recording/playback control process provides control of reading encrypted information and control of the encryption key used for information encryption from the authenticated information recording medium.

40. The information recording/playback method according to claim 39, wherein the information recording/playback control process provides control of reading encrypted information and control of the encrypted encryption key from the authenticated information recording medium, and

wherein the decryption process decrypts a read and encrypted encryption key by using medium identification information on an information recording medium authenticated by the authentication processing and decrypts encrypted information by using the encryption key which was encrypted and information thereof is decrypted.

41. The information recording/playback method according to claim 33, wherein the authentication data recording control process records a digital signature for a manufacturer of the information recording medium as a digital signature for the person recording the medium identification information.

42. An information recording method for recording information on an information recording medium including:

a random-pattern-information recording part which records random pattern information based on random physical phenomena; and

an authentication data recording part which stores, as authentication data, medium identification information created according to random pattern information detected from the random-pattern-information recording part, wherein the information recording method, comprising;

a random-pattern-information detection process which detects random pattern information from a random-pattern-information recording part on an information recording medium;

a verification data creation process which creates medium-identification-information verification data from random pattern information detected by the random-pattern-information detection process;

an authentication process which reads authentication data from the authentication data recording part on an information recording medium, performs authentication processing for an information recording medium based on medium-identification-information verification data created by the verification data creation process and based on the authentication data, and controls whether to enable writing information onto an information recording medium based on an authentication result; and

a recording control process which provides control of recording information onto an information recording medium;

wherein the authentication process verifies validity of the medium identification information with respect to an information recording medium which records, as authentication data, the medium identification information together with a digital signature of a person who recorded the medium identification information based on the person'"'"'s digital signature, and performs authentication processing with respect to the information recording medium based on medium-identification-information verification data created by the verification data creation process and based on verified valid medium identification information.

43. The information recording method according to claim 42, wherein there is further provided an encryption process which encrypts information using medium identification information from an information recording medium authenticated by the authentication processing, and

wherein the recording control process provides control of recording information authenticated by the encryption process on the authenticated information recording medium.

44. The information recording method according to claim 43, characterized in that the recording control process provides control of recording encrypted information and the encryption key used for information encryption on an authenticated information recording medium.

45. The information recording method according to claim 44, wherein the encryption process encrypts information using the encryption key and encrypts the encryption key used for information encryption using medium identification information on an information recording medium authenticated by the authentication processing, and

wherein the recording control process provides control of recording information encrypted with the encryption key and control of the encrypted encryption key on the authenticated information recording medium.

46. The information recording method according to claim 43, wherein the encryption process creates an encryption key used for the information encryption by using medium identification information on an information recording medium authenticated by the authentication processing.

47. The information recording method according to claim 42, wherein the authentication process verifies validity of the medium identification information with respect to an information recording medium which records a digital signature of a manufacturer for the information recording medium.

48. The information recording method according to claim 42, wherein the authentication process performs authentication processing with respect to an information recording medium which records a revocation list together with the authentication data based on the revocation list.

49. The information recording method according to claim 48, wherein the authentication process stores a revocation list recorded on an information recording medium when this revocation list is valid and is newer than the already stored revocation list, and performs authentication processing based on the newly stored revocation list.

50. An information playback method for playing back information from an information recording medium including a random-pattern-information recording part for recording random pattern information based on random physical phenomena and an authentication data recording part for storing, as authentication data, medium identification information created according to random pattern information detected from the random-pattern-information recording part, wherein the information playback method, comprising:

a random-pattern-information detection process which detects random pattern information from a random-pattern-information recording part on an information recording medium;

a verification data creation process which creates medium-identification-information verification data from random pattern information detected by the random-pattern-information detection process;

an authentication process which reads authentication data from the authentication data recording part on an information recording medium and performs authentication processing for an information recording medium based on medium-identification-information verification data created by the verification data creation process and based on the authentication data; and

a playback control process which provides control of reading information from an information recording medium;

wherein the authentication process verifies validity of the medium identification information with respect to an information recording medium which records, as authentication data, the medium identification information together with a digital signature of a person who recorded the medium identification information based on the person'"'"'s digital signature, and performs authentication processing with respect to an information recording medium based on medium-identification-information verification data created by the verification data creation process and based on verified valid medium identification information.

51. The information playback method according to claim 50, wherein the playback control process provides control of reading encrypted information from the authenticated information recording medium, and

wherein a decryption process decrypts encrypted information read by the playback control process from an information recording medium by using medium identification information on an information recording medium authenticated by the authentication processing.

52. The information playback method according to claim 51, wherein the playback control process provides control of reading encrypted information and control of the encryption key used for information encryption from the authenticated information recording medium.

53. The information playback method according to claim 52, wherein the playback control process provides control of reading encrypted information and control of the encrypted encryption key from the information recording medium, and

wherein the decryption process decrypts a read and encrypted encryption key by using medium identification information on an information recording medium authenticated by the authentication processing and decrypts encrypted information by using the encryption key which was encrypted and information thereof is decrypted.

54. The information playback method according to claim 50, wherein the authentication process verifies validity of the medium identification information with respect to an information recording medium which records a digital signature of a manufacturer for the information recording medium.

55. The information playback method according to claim 50, wherein the authentication process performs authentication processing with respect to an information recording medium which records a revocation list together with the authentication data based on the revocation list.

56. The information playback method according to claim 55, wherein the authentication process stores a revocation list recorded on an information recording medium in the storage part when this revocation list is valid and is newer than the already stored revocation list, and performs authentication processing based on the newly stored revocation list.

57. An authentication data recording method for recording authentication information on an information recording medium, comprising:

a random-pattern-information detection process which detects random pattern information from a random-pattern-information recording part on an information recording medium storing random pattern information based on random physical phenomena;

a medium identification information creation process which creates medium identification information from the random pattern information detected by the random-pattern-information detection process; and

an authentication data recording control process which provides control of recording, as authentication data, the medium identification information created by the medium identification information creation process in an authentication data recording part on the information recording medium;

wherein the authentication data recording control process records, as authentication data, the medium identification information together with a digital signature for a person recording the medium identification information in an authentication data recording part on the information recording medium.

58. The authentication data recording method according to claim 57, wherein the authentication data recording control process records a digital signature for a manufacturer of the information recording medium.

59. The authentication data recording method according to claim 57, wherein the authentication data recording control process records a revocation list about a manufacturer together with the authentication data in an authentication data recording part on the information recording medium.

60. An authentication processing method for performing authentication processing with respect to an information recording medium, comprising:

a random-pattern-information detection process which detects random pattern information from a random-pattern-information recording part on an information recording medium;

a verification data creation process which creates medium-identification-information verification data from random pattern information detected by the random-pattern-information detection process; and

an authentication process which reads authentication data from the authentication data recording part on an information recording medium and performs authentication processing for an information recording medium based on medium-identification-information verification data created by the verification data creation process and based on the authentication data;

wherein the authentication process verifies validity of the medium identification information with respect to an information recording medium which records, as authentication data, the medium identification information together with a digital signature of a person who recorded the medium identification information based on the person'"'"'s digital signature, and performs authentication processing with respect to an information recording medium based on medium-identification-information verification data created by the verification data creation process and based on verified valid medium identification information.

61. The authentication processing method according to claim 60, wherein the authentication process verifies validity of the medium identification information with respect to an information recording medium which records a digital signature of a manufacturer for the information recording medium.

62. The authentication processing method according to claim 60, wherein the authentication process performs authentication processing with respect to an information recording medium which records a revocation list together with the authentication data based on the revocation list.

63. The authentication processing method according to claim 62, wherein the authentication process stores a revocation list recorded on an information recording medium in the storage part when this revocation list is valid and is newer than the already stored revocation list, and performs authentication processing based on the newly stored revocation list.

64. The authentication processing method according to claim 62, wherein the authentication process stores a person'"'"'s identification information and a public key thereof for a manipulated information recording medium together with a revocation flag, updates the revocation flag using a new revocation list, and performs authentication processing based on the revocation list stored in the storage process.

65. An information recording medium for recording information, comprising:

a random-pattern-information recording part which records random pattern information based on random physical phenomena;

an authentication data recording part which stores, as authentication data, medium identification information created according to random pattern information detected from the random-pattern-information recording part; and

an information recording part which records information;

wherein the authentication data recording part records the medium identification information as authentication data together with a digital signature for a person recording the medium identification information.

66. The information recording medium according to claim 65, wherein the authentication data recording part records a digital signature for a manufacturer of the information recording medium.

67. The information recording medium according to claim 66, wherein the authentication data recording part records a revocation list about a manufacturer together with the authentication data.