Optical disk and optical method

• US 7,339,869 B2
• Filed: 09/24/2002
• Issued: 03/04/2008
• Est. Priority Date: 09/28/2001
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Tanaka, Shinichi, Ishihara, Hideshi, Hino, Yasumori, Ishibashi, Kenzo, Nagai, Takahiro
• Primary Examiner(s): Huber; Paul W.
• Application Number:
  US10/479,356
• Publication Number:
  US 20040196759A1
• Time in Patent Office: 1,988 Days
• Field of Search: None
• US Class Current: 369/53.21
• 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 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00326 the key being embossed on the record carrier
• CPC Class Codes: G11B 20/00514 wherein the entire content is encrypted with the same key, e.g. disc key or master key
• CPC Class Codes: G11B 20/00557 wherein further management data is encrypted, e.g. sector headers, TOC or the lead-in or lead-out areas
• CPC Class Codes: G11B 20/00594 wherein the shape of recording marks is altered, e.g. the depth, width, or length of pits
• CPC Class Codes: G11B 20/00601 wherein properties of tracks are altered, e.g., by changing the wobble pattern or the track pitch, or by adding interruptions or eccentricity
• CPC Class Codes: G11B 20/0071 involving a purchase action
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 23/284 on the record carrier
• CPC Class Codes: G11B 7/00 Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor G11B11/00, G11B13/00 take precedence

Abstract

An optical disk according to the present invention is the optical disk on which secret information on unique information given to a specific optical disk manufacturer or a specific optical disk and information recorded on an infringement disk list of identifying an illegitimate optical disk manufacturer or an illegitimate optical disk are recorded in advance, and the optical disk has an area in which reproduction-only encrypted data encrypted based on the secret information and the information on the infringement disk list is recorded in advance or an area capable of recording the encrypted data to be encrypted based on the secret information and the information on the infringement disk list.

Claims

1. An optical disk comprising first information relating to unique information given to a specific optical disk manufacturer or a specific optical disk and second information of identifying an illegitimate optical disk manufacturer or an illegitimate optical disk are recorded in advance, wherein

said optical disk comprises an area in which encrypted data encrypted based on said first and second information is recorded in advance or an area capable of recording the data to be encrypted based on said first and second information.

2. The optical disk according to claim 1, wherein third information relating to the unique information given to a specific optical disk drive manufacturer or a specific optical disk drive is recorded on said optical disk in advance and

said third information is also used for said encrypting.

3. The optical disk according to claim 2 comprising an area capable of recording as fourth information the information corresponding to said optical disk manufacturer determined to be illegitimate or said optical disk drive determined to be illegitimate, said fourth information also being used for said encrypting.

4. An optical disk according to claim 1, said optical disk in an optical disk drive, comprising:

first information deciphering means of deciphering the first information relating to the unique information given to a specific optical disk manufacturer or specific optical disk recorded on the optical disk,

second information storage means of obtaining second information of identifying an illegitimate optical disk manufacturer or illegitimate optical disk,

first determination of determining whether or not said optical disk is illegitimate based on the deciphering results of said first information deciphering means and storage contents of said second information storage means, and

control means of controlling reproduction of the data from said optical disk and/or recording of the data on said optical disk based on the determination result of said determination means.

5. An optical disk drive, comprising:

first information deciphering means of deciphering the first information relating to unique information given to a specific optical disk manufacturer or specific optical disk recorded on the optical disk,

second information storage means of obtaining second information of identifying an illegitimate optical disk manufacturer or illegitimate optical disk,

first determination of determining whether or not said optical disk is illegitimate based on the deciphering results of said first information deciphering means and storage contents of said second information storage means, and

control means of controlling reproduction of the data from said optical disk and/or recording of the data on said optical disk based on the determination result of said determination means.

6. The optical disk drive according to claim 5, wherein said second information is information recorded on said optical disk in advance and/or obtained via the Internet.

7. The optical disk drive according to claim 5, comprising:

unique information storage means of storing apparatus unique information given to a specific optical disk manufacturer or a specific optical disk drive, and

second determination means of reading said apparatus unique information and check it against third information on said apparatus unique information recorded on said optical disk in advance to determine whether or not said optical disk drive manufacturer is illegitimate or whether or not said optical disk drive is illegitimate, wherein

said control means also utilizes the determination result of said second determination means.

8. The optical disk drive according to claim 7, comprising:

fourth information storage means of obtaining and storing the fourth information corresponding to the optical disk manufacturer or optical disk drive determined to be illegitimate, and

updating means of updating and recording said fourth information in the data area of said optical disk based on storage contents of said fourth information storage means, wherein

said second determination means makes said determination by also utilizing the processing result of said updating means.