Apparatus for data copyright management system

• US 6,789,197 B1
• Filed: 10/02/2000
• Issued: 09/07/2004
• Est. Priority Date: 10/27/1994
• Status: Expired due to Fees

• Current Assignee: Piracy Protection LLC (LF Capital Partners, LLC)
• Original Assignee: Mitsubishi Corporation
• Inventors: Saito, Makoto
• Primary Examiner(s): Smithers, Matthew
• Application Number:
  US09/676,495
• Time in Patent Office: 1,436 Days
• Field of Search: 380/201, 380/203, 380/205, 380/210, 380/277, 380/259, 713/189, 713/190, 713/193, 713/194, 705/51, 705/57
• US Class Current: 713/193
• CPC Class Codes: G06F 21/109 by using specially-adapted hardware at the client
• CPC Class Codes: G06F 2211/007 Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
• CPC Class Codes: G06F 2211/008 Public Key, Asymmetric Key, Asymmetric Encryption
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G06Q 20/00 Payment architectures, schemes or protocols apparatus for performing or posting payment transactions G07F7/08, G07F19/00; electronic cash registers G07G1/12
• CPC Class Codes: G06Q 20/02 involving a neutral party, e.g. certification authority, notary or trusted third party [TTP]
• CPC Class Codes: G06Q 20/123 Shopping for digital content
• CPC Class Codes: G06Q 20/1235 with control of digital rights management [DRM]
• CPC Class Codes: G06Q 20/363 with the personal data of a user
• CPC Class Codes: G06Q 20/3823 combining multiple encryption tools for a transaction
• CPC Class Codes: G06Q 20/3829 involving key management
• CPC Class Codes: G07F 7/0866 by active credit-cards adapted therefor G07F7/1008 takes precedence
• CPC Class Codes: G07F 7/1016 Devices or methods for securing the PIN and other transaction-data, e.g. by encryption arrangements for secret communication, see H04L9/00
• CPC Class Codes: H04L 63/0442 wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption cryptographic mechanisms or cryptographic arrangements for public-key encryption H04L9/30
• CPC Class Codes: H04L 63/0464 using hop-by-hop encryption, i.e. wherein an intermediate entity decrypts the information and re-encrypts it before forwarding it
• CPC Class Codes: H04L 63/062 for key distribution, e.g. centrally by trusted party cryptographic mechanisms or cryptographic arrangements for key distribution involving a central third party H04L9/0819
• CPC Class Codes: H04L 63/126 the source of the received data
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/2541 Rights Management protecting software against unauthorised usage in a vending or licensing environment G06F21/10; 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 21/4147 PVR [Personal Video Recorder] H04N5/76 takes precedence ; arrangements for broadcast with accumulation-type receivers H04H20/40
• CPC Class Codes: H04N 21/4334 : Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/4405 : involving video stream decryption
• 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 21/4623 : Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message] arrangements for conditional access to broadcast information or to broadcast-related services H04H60/14
• CPC Class Codes: H04N 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 21/835 : Generation of protective data, e.g. certificates protecting software against unauthorised usage in a vending or licensing environment G06F21/10
• CPC Class Codes: H04N 7/1675 : Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58

Abstract

A data copyright management apparatus is used with a user terminal and comprises a CPU, a CPU bus, ROM, EEPROM, and RAM. The CPU, ROM, EPROM, and RAM are connected to the CPU bus, and a system bus of a device which utilizes the data can be connected to the CPU bus. A data copyright management system program, crypt algorithm, and user information are stored in the ROM, and a second private-key, a permit key, a second secret-key, and copyright information are stored in the EEPROM. A first public-key, a first private-key, a second public-key, and a first secret-key are transmitted to the RAM during operation. The data copyright management apparatus may be configured in the form of a monolithic or hybrid IC, a thin IC card, PC card, and insertion board which have a unique terminal. If a copyright management program is supplied externally, it is stored in the EEPROM. Otherwise, it is stored in the ROM. In addition to a microprocessor of a user terminal which decrypts encrypted data for displaying and processing and re-encrypts the decrypted data for storing, copying, or transferring, at least one microprocessor, desirably two microprocessors, are added for decrypting and re-encrypting data which is encrypted and supplied. The microprocessors to be added may be connected to a system bus of the microprocessor of the user terminal. It is desirable that a multiprocessor configuration is implemented by using a SCSI bus, PCI bus, or SCI bus. Apparatus for decryption and re-encryption may be configured separately or as a unit. A device which is used to input and output encrypted data may be connected directly to the apparatus for decryption and re-encryption. The data copyright management apparatus may be implemented in the form of a monolithic IC, a hybrid IC, or a built-in subboard, and the apparatus in these forms may be incorporated in a computer, television set, set-top box, digital video tape recorder, digital video disk recorder, digital audio tape apparatus, or personal digital assistants, and the like.

Claims

1. A data copyright management apparatus comprising:

a CPU bus connectable to a system bus of a user terminal;

a CPU connected to said CPU bus, decrypting with a first secret-key digital data encrypted by said first secret-key, and before handling storage, copy and transfer operations on decrypted digital data, encrypting with a second secret-key the decrypted digital data; and

an EEPROM connected to said CPU bus, storing said second secret-key.

2. A data copyright apparatus according to claim 1, wherein said EEPROM also stores said first secret-key.

3. A data copyright management apparatus according to claim 1, wherein said CPU further generates said second secret-key.

4. A data copyright management apparatus according to claim 1, wherein said second secret-key is externally supplied.

5. A data copyright management apparatus according to claim 1, further comprising a ROM connected to said CPU bus, storing a copyright management program.

6. A data copyright management apparatus according to claim 1, wherein said EEPROM further stores a copyright management program.

7. A data copyright management apparatus according to claim 1, further comprising a RAM connected to said CPU bus, storing a copyright management program.

8. A data copyright management apparatus according to any of claims 1 to 7, configured as an IC.

9. A data copyright management apparatus according to any of claims 1 to 7, configured as an IC card.

10. A data copyright management apparatus according to any of claims 1 to 7, configured as a PC card.

11. A data copyright management apparatus according to any of claims 1 to 7, configured as an insertion board.

12. A data copyright management apparatus comprising:

a CPU bus connectable to a system bus of a user terminal;

a CPU connected to said CPU bus, decrypting with a first secret-key digital data encrypted by said first secret-key, and before handling storage, copy, and transfer operations on decrypted digital data, encrypting with a second secret-key the decrypted digital data; and

a ROM connected to said CPU bus, storing a copyright management program.

13. A data copyright management apparatus according to claim 12, wherein said ROM further stores said first secret-key.

14. A data copyright management apparatus according to claim 12, wherein said CPU further generates said second secret-key.

15. A data copyright management apparatus according to claim 12, wherein said second secret-key is externally supplied.

16. A data copyright management apparatus according to claim 12, wherein said ROM further stores a copyright management program.

17. A data copyright management apparatus according to claim 12, further comprising an EEPROM connected to said CPU bus, storing a copyright management program.

18. A data copyright management apparatus according to claim 12, further comprising a RAM connected to said CPU bus, storing a copyright management program.

19. A data copyright management apparatus according to any of claims 12 to 18, configured as an IC.

20. A data copyright management apparatus according to any of the claims 12 to 18, configured as an IC card.

21. A data copyright management apparatus according to any of claims 12 to 18, configured as a PC card.

22. A data copyright management apparatus according to any of the claims 12 to 18, configured as an insertion board.

23. A data copyright management apparatus comprising:

a CPU bus connectable to a system bus of a user terminal;

a CPU connected to said CPU bus decrypted with a first secret-key digital data encrypted by said first secret-key, and before handling storage, copy, and transfer operations on decrypted digital data, encrypting with a second secret-key the decrypted digital data; and

a RAM connected to said CPU bus, storing a copyright management program.

24. A data copyright management apparatus according to claim 23, wherein said RAM further stores said first secret-key.

25. A data copyright management apparatus according to claim 23, wherein said CPU further generates said second secret-key.

26. A data copyright management apparatus according to claim 23, wherein said second secret-key is externally supplied.

27. A data copyright management apparatus according to claim 23, further comprising a ROM connected to said CPU bus, storing a copyright management program.

28. A data copyright management apparatus according to claim 23, further comprising an EEPROM connected to said CPU bus, storing a copyright management program.

29. A data copyright management apparatus according to claim 23, wherein said RAM also stores a copyright management program.

30. A data copyright management apparatus according to any of claims 23 to 29, configured as an IC.

31. A data copyright management apparatus according to any of claims 23 to 29, configured as an IC card.

32. A data copyright management apparatus according to any of claims 23 to 29, configured as a PC card.

33. A data copyright management apparatus according to any of claims 23 to 29, configured as an insertion board.

34. A data copyright management apparatus comprising:

a CPU bus connectable to a system bus of a user terminal;

a CPU connected to said CPU bus, decrypting with a first secret-key digital data encrypted by said first secret-key, before handling storage, copy and transfer operations on decrypted digital data, encrypting with a second secret-key the decrypted digital data, and decrypting with a third secret-key digital data which has been encrypted using said second secret-key and stored, copied, or transferred; and

an EEPROM connected to said CPU bus and storing said second secret-key.

35. A data copyright management apparatus according to claim 34, wherein said third secret-key is different from said first and second secret-keys.

36. A data copyright management apparatus according to claim 34, wherein said third secret-key is the same secret-key as said second secret-key.