Content data processing device, recording/reproduction device, and recording/reproduction system

• US 20070186118A1
• Filed: 02/23/2005
• Published: 08/09/2007
• Est. Priority Date: 06/09/2004
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Azuma, Kazuyo, Yagi, Yusuke
• Application Number:
  US11/628,938
• Publication Number:
  US 20070186118A1
• Time in Patent Office: Days
• US Class Current: 713/193
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• 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 20/00195 using a device identifier associated with the player or recorder, e.g. serial numbers of playback apparatuses or MAC addresses
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 9/0833 involving conference or group key network architectures or network communication protocols for key management in group communication in a packet data network H04L63/065
• CPC Class Codes: H04L 9/0866 involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics
• CPC Class Codes: H04N 2005/91328 the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]
• CPC Class Codes: H04N 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/781 on disks or drums
• CPC Class Codes: H04N 5/85 on discs or drums

Abstract

In the case of the ordinary Move function, the original content is erased and when normal move cannot be performed, the content is lost. This problem can be solved without departing from the Move concept of copy once. Unique IDs are acquired from at least two recording device and a mutual ID having the unique ID and a mutual encryption key as elements is created. Here, it is assumed that when the mutual ID is copied together with the encrypted content to another recording device, the original mutual ID is deleted. In a recording device where the mutual ID and the encrypted content are both recorded, reproduction and decryption is enabled when one of the unique IDs in the mutual ID is matched with the unique ID of the recording device.

Claims

1. A content data processing device in which a plurality of recording devices or recording media are connected, comprising:

a unique ID reading means for reading at least two unique IDs from said plurality of recording devices or recording media;

a mutual ID creating means for creating a mutual encryption key from said at least two unique IDs, creating a mutual ID, with said mutual encryption key and said at least two unique IDs as elements, and recording said mutual ID in any one of said plurality of recording devices or recording media; and

an original data suppressing means for encrypting data recorded in said recording devices or recording media by using said mutual encryption key included in said mutual ID, and recording the encrypted data in any one of said plurality of recording devices or recording media, and deleting original data or making it unreadable.

2. The content data processing device according to claim 1, comprising:

a reproduction suppressing means for determining whether or not read unique ID corresponds to at least two unique IDs in said mutual ID, when said unique ID reading means reads the unique ID from said recording devices or recording media in which said mutual ID and said encrypted data are recorded, and permitting a reproduction of said encrypted data when the read unique ID corresponds to either one of at least two unique IDs in said mutual ID, and suppressing the reproduction of said encrypted data when the read unique ID corresponds to neither of them.

3. The content data processing device according to claim 1, comprising:

a decryption suppressing means for determining whether or not read unique ID corresponds to either one of at least two unique IDs in said mutual ID, when said unique ID reading means reads the unique ID from said recording devices or recording media in which said mutual ID and said encrypted data are recorded, permitting a decryption of said encrypted data when the read unique ID corresponds to either one of at least two unique IDs in said mutual ID, decrypting said encrypted data by using said mutual encryption key in said mutual ID and recording it in said recording devices or recording media, and deleting said encrypted data and said mutual ID or making them unreadable, and suppressing the decryption when the read unique ID correspond to neither of them.

4. A recording/reproduction device having the content data processing device according to claim 1 and a plurality of recording devices or recording media.

5. A recording/reproduction device having the content data processing device according to claim 2, and a plurality of recording devices or recording media.

6. A recording/reproduction device having the content data processing device according to claim 3 and a plurality of recording devices or recording media.

7. A recording/reproduction system in which the content data processing device according to claim 1 and a plurality of devices having at least one recording device or recording medium are connected.

8. A recording/reproduction system in which the content data processing device according to claim 2 and a plurality of devices having at least one recording device or recording medium are connected.

9. A recording/reproduction system in which the content data processing device according to claim 3 and a plurality of devices having at least one recording device or recording medium are connected.

10. The content data processing device according to claim 1, comprising:

a copy suppressing means for determining whether or not read unique ID corresponds to either one of at least two unique IDs in said mutual ID, when said unique ID reading means reads the unique ID from said recording devices or recording media in which said mutual ID and said encrypted data are recorded, permitting said encrypted data to be copied to said recording devices or recording media when the read unique ID corresponds to either one of at least two unique IDs in said mutual ID, and suppressing the copy of said encrypted data to said recording device or recording media when the read unique ID corresponds to neither of them.

11. The content data processing device according to claim 2, comprising:

a copy suppressing means for determining whether or not read unique ID corresponds to either one of at least two unique IDs in said mutual ID, when said unique ID reading means reads the unique ID from said recording devices or recording media in which said mutual ID and said encrypted data are recorded, permitting said encrypted data to be copied to said recording devices or recording media when the read unique ID corresponds to either one of at least two unique IDs in said mutual ID, and suppressing copy of said encrypted data to said recording devices or recording media when the read unique ID corresponds to neither of them.

12. The content data processing device according to claim 3, comprising:

a copy suppressing means for determining whether or not read unique ID corresponds to either one of at least two unique IDs in said mutual ID, when said unique ID reading means reads the unique ID from said recording devices or recording media in which said mutual ID and said encrypted data are recorded, permitting said encrypted data to be copied to said recording devices or recording media when the read unique ID corresponds to either one of at least two unique IDs in said mutual ID, and suppressing the copy of said encrypted data to said recording devices or recording media when the read unique ID corresponds to neither of them.

13. A recording/reproduction device having the content data processing device according to claim 10 and a plurality of recording devices or recording media.

14. A recording/reproduction device having the content data processing device according to claim 11 and a plurality of recording devices or recording media.

15. A recording/reproduction device having the content data processing device according to claim 12 and a plurality of recording devices or recording media.

16. A recording/reproduction system in which the content data processing device according to claim 10 and a plurality of devices having at least one recording device or recording medium are connected.

17. A recording/reproduction system in which the content data processing device according to claim 11 and a plurality of devices having at least one recording device or recording medium are connected.

18. A recording/reproduction system in which the content data processing device according to claim 12 and a plurality of devices having at least one recording device or recording medium are connected.