Information-processing system and method, information-transmission-processing apparatus, and information-reception-processing apparatus

• US 7,752,447 B2
• Filed: 06/03/2005
• Issued: 07/06/2010
• Est. Priority Date: 06/08/2004
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kazami, Shinichi
• Primary Examiner(s): Moazzami; Nasser
• Assistant Examiner(s): Pogmore; Travis
• Application Number:
  US11/143,655
• Publication Number:
  US 20050271206A1
• Time in Patent Office: 1,859 Days
• Field of Search: 713/176, 380201-204, 386 94- 95, 386/E5.004
• US Class Current: 713/176
• 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 20/00123 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 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• 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
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection

Abstract

A processing apparatus for transmitting electronic information on copyrighted work, which has a predetermined amount of data, with an electronic signature being added thereto, includes division-processing device which divides the electronic information on copyrighted work into at least two parts, electronic-signature-operating device which operates to add the electronic signature for every part of the electronic information on copyrighted work divided by the division-processing device, and information-transmitting device which synthesizes the electronic information on copyrighted work to which the electronic-signature-operating device operates to add the electronic signature and electronic signature information for determining whether the electronic signature is legitimate and transmits the synthesized information.

Claims

1. An information-transmission-processing apparatus for transmitting electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, said apparatus comprising:

a division-processing unit configured to divide the electronic information corresponding to the copyrighted work into at least two parts;

an electronic-signature-operating unit configured to add the electronic signature to each part of the electronic information corresponding to the copyrighted work divided by the division-processing unit; and

an information-transmitting unit configured to combine the electronic information corresponding to the copyrighted work to which the electronic-signature-operating unit has added the electronic signature, to combine electronic signature information for determining whether the electronic signature is legitimate and to transmit the combined information.

2. The information-transmission-processing apparatus according to claim 1,

wherein the electronic-signature-operating unit is further configured to:

calculate message digest information using hash function for each part of the divided electronic information corresponding to the copyrighted work, and

encrypt the message digest information calculated based on public-key information and secret key information.

3. The information-transmission-processing apparatus according to claim 2,

wherein the electronic-signature-operating unit is further configured to:

calculate the message digest information using the hash function in connection with additional information that is added to each part of the divided electronic information corresponding to a copyrighted work, and

encrypt the message digest information in connection with the additional information, said message digest information being calculated based on the public-key information and the secret key information.

22. The information-transmission-processing apparatus according to claim 1, further comprising:

a recordable medium data transmitting unit configured to address information and disk division information necessary to record the electronic information divided by the division-processing unit on a recordable storage medium.

4. An information-transmission-processing apparatus which transmits electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, said apparatus comprising:

division-processing device which divides the electronic information corresponding to the copyrighted work into at least two parts;

electronic-signature-operating device which adds the electronic signature to each part of the electronic information corresponding to the copyrighted work divided by the division-processing device; and

information-transmitting unit which combines the electronic information corresponding to the copyrighted work to which the electronic-signature-operating device adds the electronic signature and electronic signature information for determining whether the electronic signature is legitimate and transmits the combined information.

5. An information-reception-processing apparatus for receiving and verifying electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, said apparatus comprising:

a receiving unit configured to receive the electronic information corresponding to the copyrighted work, said information being divided into at least two parts and including the electronic signature, and electronic signature information for determining whether the electronic information corresponding to the copyrighted work is legitimate; and

a determining unit configured to determine whether the electronic signature is legitimate based on the electronic signature information for each part of the previously divided electronic information corresponding to the copyrighted work, in connection with the electronic information corresponding to the copyrighted work thus received by the receiving unit.

6. The information-reception-processing apparatus according to claim 5, further comprising a decoder which decodes the electronic signature information based on public-key information and secret key information.

7. An information-reception-processing apparatus which receives and verifies electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, said apparatus comprising:

receiving device which receives the electronic information corresponding to the copyrighted work, said information being divided into at least two parts and including the electronic signature, and electronic signature information for determining whether the electronic information corresponding to the copyrighted work is legitimate; and

determining device which determines whether the electronic signature is legitimate based on the electronic signature information for each part of the previously divided electronic information corresponding to the copyrighted work, in connection with the electronic information corresponding to the copyrighted work thus received by the receiving device.

8. An information-processing system which processes electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, the system comprising:

information-transmission-processing apparatus which transmits the electronic information corresponding to the copyrighted work by dividing the electronic information corresponding to the copyrighted work into at least two parts, adding the electronic signature to every part of the divided electronic information corresponding to the copyrighted work, and combining the electronic information corresponding to the copyrighted work including the electronic signature and electronic signature information for determining whether the electronic signature is legitimate and transmitting the combined information; and

information-reception-processing apparatus which receives the electronic information corresponding to the copyrighted work from the information-transmission-processing apparatus, wherein it is determined whether the electronic signature is legitimate based on the electronic signature information for each part of the divided electronic information corresponding to the copyrighted work in connection with the received electronic information corresponding to the copyrighted work.

9. The information-processing system according to claim 8,

wherein the information-transmission-processing apparatus performs:

generation of message digest information using hash function for each part of the divided electronic information on copyrighted work, and

encryption of the generated message digest information based on public-key information and secret key information.

10. The information-processing system according to claim 8,

wherein the information-reception-processing apparatus decrypts the electronic signature information based on public-key information and secret key information, which are received from the information-transmission-processing apparatus.

11. An information-processing method for processing electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, the method comprising:

dividing the electronic information corresponding to the copyrighted work into at least two parts at a transmitting side;

adding the electronic signature to every part of the divided electronic information corresponding to the copyrighted work at the transmitting side;

combining the electronic information corresponding to the copyrighted work including the electronic signature and electronic signature information for determining whether the electronic signature is legitimate and transmitting the combined information to a receiving side;

receiving, at the receiving side, the electronic information corresponding to the copyrighted work and the electronic signature information from the transmitting side; and

determining whether the electronic signature is legitimate based on the electronic signature information for each part of the divided electronic information corresponding to the copyrighted work, in connection with the electronic information corresponding to the copyrighted work that has been received from the transmitting side.

12. The information-processing method according to claim 11, wherein when adding a message digest information to each part of the divided electronic information on copyrighted work, plural pieces of the message digest information are subject to writing of an electronic signature.

13. The information-processing method according to claim 11, wherein a common message digest information is generated based on the message digest information that is added to a part of the divided electronic information corresponding to the copyrighted work and the message digest information that is added to each other part of the divided electronic information on copyrighted work;

and

wherein the common message digest information is encrypted to generate common electronic signature information.

14. The information-processing method according to claim 13, wherein the common message digest information thus encrypted is added to at least two parts of the divided electronic information on copyrighted work.

15. The information-processing method according to claim 11, further comprising:

calculating message digest information using hash function for each part of the divided electronic information corresponding to the copyrighted work and

encrypting the calculated message digest information based on public-key information and secret key information.

16. The information-processing method according to claim 11, further comprising:

calculating message digest information using hash function in connection with additional information added to each part of the divided electronic information corresponding to the copyrighted work and

encrypting the calculated message digest information in connection with the additional information based on public-key information and secret key information.

17. The information-processing method according to claim 11, wherein the receiving side decrypts the electronic signature information using public-key information and secret key information that have been received from the transmitting side.

18. An information-transmitting method for transmitting electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, the method comprising:

dividing the electronic information corresponding to the copyrighted work into at least two parts;

adding the electronic signature to each part of the divided electronic information corresponding to the copyrighted work; and

combining the electronic information corresponding to the copyrighted work including the electronic signature and electronic signature information for determining whether the electronic signature is legitimate and transmitting the combined information.

19. An information-receiving method for receiving and verifying electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, said method comprising:

receiving the electronic information corresponding to the copyrighted work, said information being divided into at least two parts and including the electronic signature, and electronic signature information for determining whether the electronic signature is legitimate; and

determining whether the electronic signature is legitimate based on the electronic signature information for each part of the previously divided electronic information corresponding to the copyrighted work, in connection with the received electronic information corresponding to the copyrighted work.

20. A computer-readable storage medium having stored therein a program for performing an information-transmitting method for transmitting electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, the method comprising:

dividing the electronic information corresponding to the copyrighted work into at least two parts;

adding the electronic signature to each part of the divided electronic information corresponding to the copyrighted work; and

combining the electronic information corresponding to the copyrighted work including the electronic signature and electronic signature information for determining whether the electronic signature is legitimate and transmitting the combined information.

21. A computer-readable storage medium having stored therein a program for performing an information-receiving method for receiving and verifying electronic information corresponding to a copyrighted work, said information having a predetermined amount of data, with an electronic signature being added thereto, said method comprising:

receiving the electronic information corresponding to the copyrighted work, said information being divided into at least two parts and including the electronic signature, and electronic signature information for determining whether the electronic signature is legitimate; and

determining whether the electronic signature is legitimate based on the electronic signature information for each part of the previously divided electronic information corresponding to the copyrighted work, in connection with the received electronic information corresponding to the copyrighted work.