Encrypted data reproducing transmitting and processing method and apparatus with separately encrypted control data

• US 6,480,607 B1
• Filed: 12/08/1998
• Issued: 11/12/2002
• Est. Priority Date: 12/10/1997
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ezaki, Tadashi, Kimura, Yuji, Kori, Teruhiko, Ogino, Akira
• Primary Examiner(s): Darrow, Justin T.
• Application Number:
  US09/207,292
• Time in Patent Office: 1,435 Days
• Field of Search: 701/65, 701/94, 701/76, 380/201-204, 380/210, 380/236, 380/237, 380/239, 380/240, 380/241, 380/242, 705/51, 705/57, 705/58, 713/165, 713/176, 713/194
• 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 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00449 content scrambling system [CSS]
• CPC Class Codes: G11B 20/00884 involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
• CPC Class Codes: H04N 2005/91335 the copy protection signal being a watermark
• CPC Class Codes: H04N 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 21/42646 for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM
• CPC Class Codes: H04N 21/4325 by playing back content from the storage medium reproduction of recorded television signals H04N5/76; reproduction of recorded television signals H04N9/79
• CPC Class Codes: H04N 21/4408 involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• CPC Class Codes: H04N 21/4627 Rights management associated to the content security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/6125 involving transmission via Internet transmission by internet of broadcast information H04H60/82
• CPC Class Codes: H04N 21/8358 involving watermark protecting executable software by watermarking G06F21/16; image watermarking in general G06T1/0021; watermarks inserted in still images for transmission purposes H04N1/32144; inserting watermarks during video coding H04N19/467
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection
• CPC Class Codes: H04N 7/162 Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
• CPC Class Codes: H04N 9/8042 involving data reduction

Abstract

A data reproducing apparatus high in security against unauthorized duplication. A drive 20 includes a first CSS encoder 21 for performing first encryption processing on picture data etc reproduced from an optical disc D and a second CSS encoder 22 for performing second encryption processing different from the first encryption processing on the media type information of the optical disc D. The drive transmits the so-processed data or information. A data processing device 30 performs decryption processing on the transmitted picture data etc and on the media type information by respective independent decoders. The data processing apparatus detects the copyright control information from the picture data etc and performs reproduction limitation or recording limitation on the picture data etc.

Claims

1. A data reproducing apparatus for reproducing audio visual data, comprising:

reproducing means for reproducing first and second data recorded on a recording medium;

first encryption means for performing first encryption processing on said first data reproduced from said recording medium by said reproducing means, said first data comprising medium type information;

second encryption means for performing second encryption processing different from said first encryption processing on said second data reproduced from said recording medium by said reproducing means, said second data comprising copyright control information, and said second encryption processing comprising watermark processing to superimpose said second data on said audio visual data; and

transmission means for transmitting the data encrypted by said first encryption means and the second encryption means;

wherein said copyright control information and said medium type information are used to control copyright control processing.

2. The data reproducing apparatus according to claim 1 wherein

said reproducing means reproduces said audio visual data.

3. The data reproducing apparatus according to claim 2 wherein

the copyright control information is superimposed by watermark processing on said audio visual data after being reproduced as part of said audio visual data.

4. A data reproducing apparatus for reproducing audio visual data, comprising:

reproducing means for reproducing first and second data recorded on a recording medium;

encryption means for encrypting the first data reproduced by said reproducing means comprising medium-type information in accordance with a first encryption processing and for encrypting the second data reproduced by said reproducing means, comprising copyright control information relevant at least to copyright control processing of said audio visual data, in accordance with a superimposing watermark process;

transmission means for transmitting said first and second data encrypted by said encrypting means to an external signal processing device;

reception means for receiving playback control data transmitted from said external signal processing device, said playback control data comprising said data transmitted by said transmission means encrypted in a manner different from said encrypting by said encrypting means and processed with copyright control processing;

decrypting means for performing decryption processing matched to encryption of said playback control data received by said reception means; and

control means for controlling the playback processing of said reproducing means based on said playback control data decrypted by said decrypting means.

5. The data reproducing apparatus according to claim 4 wherein

said reproducing means reproduces said audio visual data.

6. The data reproducing apparatus according to claim 5 wherein

the copyright control information is superimposed by watermark processing on said audio visual data after being reproduced as part of said audio visual data.

7. The data reproducing apparatus according to claim 4 wherein

said encryption means includes first encrypting means for performing first encryption processing on said first data reproduced by said reproducing means and a second encrypting means for performing second encryption processing different from said first encryption processing on at least said copyright control information of said second reproduced data relevant to copyright control processing;

said reception means receiving playback control data encrypted in a manner different from both said first encryption processing and said second encryption processing.

8. The data reproducing apparatus according to claim 7 wherein said reproducing means reproduces said audio visual data.

9. The data reproducing apparatus according to claim 8 wherein

the copyright control information is superimposed by watermark processing on said audio visual data after being reproduced as part of said audio visual data.

10. A data processing apparatus for reproducing audio visual data, comprising:

reception means for receiving first data processed in accordance with first encryption processing and second data superimposed on said audio visual data in accordance with watermark processing different from said first encryption processing, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first and second data being transmitted from an external device;

first decrypting means for performing first decryption processing, matched to said first encryption processing, on said first data received by said reception means, said first data comprising media-type information;

second decrypting means for performing second decryption processing, matched to said watermark processing, on said second data received by said reception means;

outputting means for outputting data decrypted by said second decrypting means; and

control means for performing copyright control processing of said data output by said outputting means, based on at least the first data decrypted by the first decryption means and the second data, comprising copyright control information, decrypted by said second decrypting means, for controlling outputting processing of said outputting means.

11. The data processing apparatus according to claim 10 wherein said reception means receives said audio visual data and said copyright control information.

12. The data processing apparatus according to claim 11 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

copyright control information detecting means being provided for detecting the copyright control information from the second data decrypted by said second decrypting means;

said control means performing output control of said data output by said outputting means based on said copyright control information detected by said copyright control information detection means and based on said medium-type information decrypted by said first decrypting means.

13. A data processing apparatus for reproducing audio visual data, comprising:

reception means for receiving first data comprising medium-type information and second data, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first data being encrypted in accordance with a first encryption process and the second data being superimposed on said audio visual data in accordance with watermark processing, said first and second data being transmitted in this encrypted form from an external device;

decrypting means for performing matched decryption processing on said first data and said second data received by said reception means;

outputting means for outputting data decrypted by said decrypting means;

control means for performing copyright control processing of said data output by said outputting means, based on at least the first data and second data decrypted by said decrypting means, for generating transmission control data for controlling transmission processing of said data transmitted from said external device;

encrypting means for performing encryption processing on said transmission control data generated by said control means, said encryption processing being different from that performed on the first and second data received by said reception means; and

transmitting means for transmitting the transmission control data encrypted by said encrypting means to said external device.

14. The data processing apparatus according to claim 13 wherein said reception means receives said audio visual data and the first and second data for the copyright control processing thereof.

15. The data processing apparatus according to claim 14 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

copyright control information detection means being provided for detecting the copyright control information from the first and second data decrypted by said decrypting means received via said reception means;

said control means performing copyright control processing controlling of said data output by said outputting means, based on said copyright control information detected by said copyright control information detection means and based on said medium-type information decrypted by said decrypting means, for generating transmission control data controlling transmission processing of data transmitted from said external device.

16. The data processing apparatus according to claim 13 wherein

said reception means receiving said first data processed with first encryption processing and said second data, comprising copyright control information at least relevant to copyright control processing of said audio visual data and which is superimposed in accordance with watermark processing, said first data and the second data being transmitted from an external device;

said decrypting means including first decrypting means for performing decryption processing, matched to said first encryption processing, on said first data received by said reception means, and second decrypting means for performing decryption processing, matched to said watermark processing, on said second data received by said reception means; and

said encrypting means performs encryption processing on the transmission control data, said encrypting processing being different from both said first encryption processing and said watermark processing.

17. The data processing apparatus according to claim 16 wherein said reception means receives said audio visual data and said copyright control information for the copyright control processing thereof.

18. The data processing apparatus according to claim 17 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

copyright control information detection means being provided for detecting the copyright control information from the second data decrypted by said second decrypting means;

said control means performing output control processing of said data output by said outputting means based on said copyright control information detected by said copyright control information detection means and based on said medium-type information decrypted by said first decrypting means for generating transmission control data controlling the transmission processing of data transmitted from said external device.

19. A data transmission system comprising a data reproducing apparatus and a data processing apparatus, in which audio visual data reproduced from a recording medium by said data reproducing apparatus is transmitted to said data processing apparatus, the transmitted data being processed in a predetermined manner by said data processing apparatus and in which the processed data is then output,

said data reproducing apparatus including reproducing means for reproducing first and second data recorded on a recording medium, first encryption means for performing first encryption processing on said first data reproduced from said recording medium by said reproducing means, said first data comprising medium-type information, second encryption means for performing second encryption processing different from said first encryption processing on said second data reproduced from said recording medium by said reproducing means, said second data comprising copyright control information, and said second encryption processing comprising watermark processing to superimpose said second data on said audio visual data, and transmission means for transmitting the data encrypted by said first encryption means and the second encryption means;

said data processing apparatus including reception means for receiving first data processed with said first encryption processing and second data superimposed on said audio visual data in accordance with said watermark processing different from said first encryption processing, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first and second data being transmitted from an external device, first decrypting means for performing first decryption processing, matched to said first encryption processing, on said first data received by said reception means, second decrypting means for performing second decryption processing, matched to said watermark processing, on said second data received by said reception means, outputting means for outputting data decrypted by said second decrypting means, and control means for performing copyright control processing of said data output by said outputting means, based on at least the first data decrypted by the first decryption means and the second data, comprising copyright control information decrypted by said second decrypting means, for controlling outputting processing of said outputting means.

20. The data transmission system according to claim 19 wherein

said transmission means and the reception means transmit and receive said audio visual data and said copyright control information for copyright control processing thereof, respectively.

21. The data transmission system according to claim 20 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

copyright control information detection means being provided in the data processing apparatus for detecting the copyright control information from the second data decrypted by said second decrypting means, said control means controlling the output of data by said outputting means based on said copyright control information detected by said copyright control information detection means and based on said medium-type information decrypted by said first decrypting means.

22. A data transmission system comprising a data reproducing apparatus and a data processing apparatus, in which audio visual data reproduced from a recording medium by said data reproducing apparatus is transmitted to said data processing apparatus, the transmitted audio visual data is processed in a predetermined manner by said data processing apparatus, and in which the processed audio visual data is output,

said data reproducing apparatus including reproducing means for reproducing first and second data recorded on a recording medium, encryption means for encrypting, in accordance with a first encryption processing, the first data comprising media-type information reproduced by said reproducing means and for encrypting the second data reproduced by said reproducing means in accordance with a superimposing processing, said second data comprising copyright control information relevant to at least copyright control processing of said audio visual data, transmission means for transmitting said first and second data encrypted by said encrypting means to an external signal processing device, reception means for receiving playback control data transmitted from said external signal processing device, said playback control data being said data transmitted by said transmission means, said transmitted data being processed with copyright control processing, decrypting means for performing decryption processing matched to the encryption of said playback control data received by said reception means, and control means for controlling the playback processing of said reproducing means based on said playback control data decrypted by said decrypting means;

said data processing device including reception means for receiving said first data comprising media-type information and said second data, comprising copyright control information relevant to at least copyright control processing of said audio visual data, said first data being encrypted in accordance with a first encryption process and the second data being superimposed on said audio visual data in accordance with watermark processing, said first and second data being transmitted in this encrypted form from an external device, decrypting means for performing matched decryption processing on said first and said second data received by said reception means, outputting means for outputting data decrypted by said decrypting means, control means for performing copyright control processing of said data output by said outputting means, based on at least the first data and the second data decrypted by said decrypting means, for generating transmission control data for controlling the transmission processing of said data transmitted from said external device, encrypting means for performing encryption processing on said transmission control data generated by said control means, said encryption processing being different from the encryption processing performed on the first and second data received by said reception means, and transmitting means for transmitting the transmission control data encrypted by said encrypting means to said external device.

23. The data transmission system according to claim 22 wherein

said transmission means and the reception means transmit and receive said audio visual data and said copyright control information for copyright control processing thereof, respectively.

24. The data transmission system according to claim 23 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

copyright control information detection means being provided in said data processing device for detecting the copyright control information from first and second data decrypted by said first decrypting means received via said reception means; and

said control means performing copyright control processing of said data output by said outputting means, based on said copyright control information detected by said copyright control information detection means and based on said medium-type information decrypted by said decrypting means, to perform copyright control processing of said data output by said outputting means to control data transmitted from said data reproducing means.

25. The data transmission system according to claim 22 wherein

in said data reproducing device, said encryption means includes first encrypting means for performing first encryption processing on said first data reproduced by said reproducing means and a second encrypting means for performing second encryption processing different from said first encryption processing on at least copyright control information of said reproduced data relevant to copyright control processing;

and wherein

in said data processing device, said decrypting means includes first decrypting means for performing first decryption processing, matched to said first encryption processing, on said data received by said reception means, and second decrypting means for performing second decryption processing, matched to said second encryption processing, on said data received by said reception means, said encrypting means performing encryption processing different from both the first decryption processing and the second decryption processing on the transmission control data.

26. The data transmission system according to claim 25 wherein

said transmission means and said reception means transmit and receive said audio visual data and said copyright control information for copyright control processing thereof, respectively.

27. The data transmission system according to claim 26 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

and

copyright control information detection means being provided in said data reproducing device for detecting the copyright control information from the audio visual data decrypted by said second decrypting means, said control means performing output control processing of said data output by said outputting means, based on said copyright control information detected by said copyright control information detection means and based on said medium-type information decrypted by said first decrypting means to generate transmission control data controlling data transmitted from said data reproducing means.

28. A data reproducing method for reproducing audio visual data comprising the steps of:

reproducing first and second data recorded on a recording medium;

performing first encryption processing on the first data reproduced, said first data comprising medium-type information;

performing second encryption processing, different from said first encryption processing, on said second data, said second data comprising copyright control information, and said second encryption processing comprising watermark processing to superimpose said second data on said audio visual data; and

transmitting the encrypted data and encrypted control data;

wherein said copyright control information and said medium-type information are used to control copyright control processing.

29. The data reproducing method according to claim 28 wherein

said audio visual data is reproduced from said recording medium.

30. The data reproducing apparatus according to claim 29 wherein

the copyright control information is superimposed by watermark processing on said audio visual data after being reproduced as part of said audio visual data.

31. A data reproducing method for reproducing audio visual data comprising the steps of:

reproducing first and second data recorded on a recording medium;

encrypting the reproduced first data comprising medium-type information in accordance with a first encryption processing for encrypting the reproduced second data, comprising copyright and control information relevant to at least the copyright control processing of said audio visual data in accordance with a superimposing watermark process;

transmitting the encrypted first and second data to an external signal processing device;

receiving playback control data transmitted from said external signal processing device, said playback control data comprising the data transmitted to said external signal processing device following copyright control processing and subsequent encryption processing different from the prior encryption processing performed on said control data;

performing decryption processing on the received playback control data matched to the encryption processing for the received playback control data; and

controlling the playback processing based on the decrypted playback control data.

32. The data reproducing method according to claim 31 wherein

said audio visual data is reproduced from said recording medium.

33. The data reproducing apparatus according to claim 32 wherein

the copyright control information is superimposed by watermark processing on said audio visual data after being reproduced as part of said audio visual data.

34. A data reproducing method for reproducing audio visual data comprising the steps of:

reproducing first and second data from a storage device;

performing first encryption processing on the reproduced first data comprising medium-type information;

performing second encryption processing, different from said first encryption processing, on the reproduced second data, comprising copyright control information relevant to copyright control processing of the reproduced audio visual data; and

receiving playback control data subjected to encryption processing different from both the first encryption processing and the second encryption processing.

35. The data reproducing method according to claim 34 wherein

said audio visual data is reproduced from said recording medium.

36. The data reproducing apparatus according to claim 35 wherein

the copyright control information is superimposed by watermark processing on said audio visual data after being reproduced as part of said audio visual data.

37. A data processing method for reproducing audio visual data comprising the steps of:

receiving first data subjected to first encryption processing and second data superimposed on said audio visual data in accordance with watermark processing different from said first encryption processing, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first and second data being transmitted from an external device;

performing first decryption processing matched to said first encryption processing on the received first data, said first data comprising medium-type information;

performing second decryption processing matched to said watermark processing on the received second data;

performing at least copyright control processing of said audio visual data based on said first and second data; and

outputting the audio visual data in accordance with said copyright control processing.

38. The data processing method according to claim 37 wherein said audio visual data and the first and second data relevant to copyright control processing thereof are received together.

39. The data processing method according to claim 38 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

the copyright control information is detected from the second data decrypted in accordance with said second decryption processing; and

said audio visual data is outputting-controlled based on the detected copyright control information and on the decrypted medium-type information.

40. A data processing method for reproducing audio visual data comprising the steps of:

receiving first data comprising medium-type information and second data, comprising copyright control information at least relevant to copyright control processing of said audio visual data, said first data being encrypted in accordance with a first encryption processing and the second data being superimposed on said audio visual data in accordance with watermark processing, said first and second data being transmitted in this encrypted form from an external device;

performing matched decryption processing on the received first data and second data;

outputting the decrypted data;

performing copyright control processing on said output data, based at least in part on the decrypted first and second data, to generate transmission control data for controlling transmission of data from said external device;

performing encryption processing, different from that performed on the first and second data, on the generated transmission control data; and

transmitting the encrypted transmission control data to said external device.

41. The data processing method according to claim 40 wherein

said audio visual data and the first and second data relevant to copyright control processing are received together.

42. The data processing method according to claim 41 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

the copyright control information is detected from the decrypted first and second data; and

wherein

copyright control processing is performed on the output data based on the detected copyright control information and based on said medium-type information.

43. The data processing method according to claim 40, further comprising the steps of:

receiving said first data subjected to first encryption processing and said second data, comprising copyright control information relevant to at least copyright control processing of said audio visual data and which is superimposed in accordance with watermark processing, said first data and said second data being transmitted from an external device;

subjecting the received first data to first decryption processing matched to said first encryption processing;

subjecting the received second data to second decryption processing matched to said watermark processing; and

subjecting the transmitted control data to encryption processing different from both the first encryption processing and the watermark processing.

44. The data processing method according to claim 43, further comprising the step of:

receiving said audio visual data and said copyright control information relevant to copyright control processing together.

45. The data processing method according to claim 44 wherein

the copyright control information is superimposed by watermark processing on said audio video data;

the copyright control information is detected from the decrypted audio visual data, and wherein

copyright control processing of said outputted data is performed based on the detected copyright control information and the decrypted medium-type information.

46. A data transmission method in which a transmitting side transmits audio visual data reproduced from a recording medium via a transmission medium and in which a reception side performs pre-set processing on transmitted audio visual data to output the processed audio visual data, wherein

the transmitting side reproduces first and second data recorded on the recording medium, said first data comprising medium-type information, processes the reproduced first data with first encryption, processes the reproduced second data with second encryption different from said first encryption, said second data comprising copyright control information, and said second encryption processing comprising watermark processing to superimpose said second data on said audio visual data, and transmits the encrypted first and second data over a transmission medium;

the reception side receives the transmitted first data and second data superimposed on said audio visual data, performs first decryption processing matched to said first encryption processing on the received first data, performs second decryption processing matched to said second encryption processing on the received second data, the decrypted first and second data being output, and copyright control processing for the output data being performed based on at least the copyright control information subjected to said second decryption processing.

47. The data transmission method according to claim 46 further comprising the step of:

transmitting said audio visual data and said copyright control information relevant to copyright control processing together.

48. The data transmission method according to claim 47 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

and wherein

the reception side detects the copyright control information from decrypted second data and performs output control of said audio visual data based on the detected copyright control information and the decrypted medium-type information.

49. A data transmission method in which a transmitting side transmits audio visual data reproduced from a recording medium via a transmission medium and in which a reception side performs pre-set processing on transmitted audio visual data to output the processed audio visual data, wherein

the transmitting side reproduces first and second data recorded on the recording medium, processes the reproduced first data in accordance with a first encryption processing, said first data comprising medium-type information and processing the reproduced second data in accordance with a superimposing process, said second data comprising copyright and control information relevant to at least copyright control processing of said audio visual data, transmits the encrypted first and second data over a transmission medium to the reception side, receives encrypted playback control data, performs decryption processing matched to encryption processing of the received playback control data, and controls playback processing based on the decrypted playback control data;

and wherein

the reception side receives the transmitted first and second data, performs matched decryption processing on the received first and second data, outputs the decrypted data, performs copyright control processing of said output data based on at least the decrypted first and second data, generates transmission control data for controlling the transmission of data from the transmitting side, performs decryption processing on the generated transmission control data different from that performed on the received first and second data, and transmits the encrypted transmission control data to the transmitting side.

50. The data transmission method according to claim 49 further comprising the step of:

transmitting said audio visual data and said first and second data together.

51. The data transmission method according to claim 50 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

and wherein

the reception side detects the copyright control information from the decrypted first and second data and performs copyright control processing of the output data based on at least the detected copyright control information and the decrypted medium-type information to generate transmission control data for controlling transmission of data from the transmitting side.

52. The data transmitting method according to claim 49 wherein

the transmitting side performs first encryption processing on the reproduced first data, performs second encryption processing different from the first encryption processing on the reproduced second data, and receives the encrypted playback control data from the receiving side;

and wherein

the reception side receives the transmitted first and second data and the control data, performs first decryption processing matched to the first encryption processing on said first data and second decryption processing matched to the second encryption processing on the received second data, and decryption on the received playback control data corresponding to the encryption processing thereof, respectively, and performs encryption processing different from both the first encryption processing and the second encryption processing on the transmission control data.

53. The data transmitting method according to claim 52 further comprising the steps of:

reproducing said audio visual data and said first and second data together.

54. The data transmitting method according to claim 53 wherein

the copyright control information is superimposed by watermark processing on said audio visual data;

and wherein

the reception side detects the copyright control information from decrypted first and second data and performs copyright control processing of the output data based on at least the detected copyright control information and the decrypted medium-type information to generate transmission control data for controlling transmission of data from the transmitting side.