Optical disk, optical disk recording and reproducing apparatus, method for recording, reproducing and deleting data on optical disk, and information processing system

• US 20050185547A1
• Filed: 04/29/2005
• Published: 08/25/2005
• Est. Priority Date: 04/28/1999
• Status: Abandoned Application

• Current Assignee: Atsushi Nakamura, Hideshi Ishihara, Kouhei Nakata, Mamoru Shoji, Mitsuaki Oshima, Motoshi Ito, Shunji Ohara, Tadashi Jahana, Takahiro Nagai, Takashi Ishida, Takashi Yumiba, Yuji Takagi
• Original Assignee: Atsushi Nakamura, Hideshi Ishihara, Kouhei Nakata, Mamoru Shoji, Mitsuaki Oshima, Motoshi Ito, Shunji Ohara, Tadashi Jahana, Takahiro Nagai, Takashi Ishida, Takashi Yumiba, Yuji Takagi
• Inventors: Ishihara, Hideshi, Takagi, Yuji, Ito, Motoshi, Nakamura, Atsushi, Oshima, Mitsuaki, Ishida, Takashi, Shoji, Mamoru, Yumiba, Takashi, Nagai, Takahiro, Ohara, Shunji, Nakata, Kouhei, Jahana, Tadashi
• Application Number:
  US11/117,549
• Publication Number:
  US 20050185547A1
• Time in Patent Office: Days
• US Class Current: 369/47.550
• CPC Class Codes: G11B 19/12 by sensing distinguishing features of or on records, e.g. diameter end mark
• CPC Class Codes: G11B 19/122 involving the detection of an identification or authentication mark record carriers indicating unauthorised or prior use G11B23/28
• 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 20/00115 wherein the record carrier stores a unique medium identifier
• CPC Class Codes: G11B 20/00181 using a content identifier, e.g. an international standard recording code [ISRC] or a digital object identifier [DOI]
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00224 wherein the key is obtained from a remote server
• CPC Class Codes: G11B 20/00268 said barcode being recorded in a burst cutting area [BCA]
• CPC Class Codes: G11B 20/00304 the key being stored in the lead-in area [LIA]
• CPC Class Codes: G11B 20/00311 the key being stored in the lead-out area [LOA]
• CPC Class Codes: G11B 20/00333 the key being stored in header data, e.g. in sector headers
• CPC Class Codes: G11B 20/00347 wherein the medium identifier is used as a key
• CPC Class Codes: G11B 20/00492 wherein content or user data is encrypted
• CPC Class Codes: G11B 20/00528 wherein each title is encrypted with a separate encryption key for each title, e.g. title key for movie, song or data file
• 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 20/00666 involving a step of erasing or nullifying data, e.g. data being overwritten with a random string
• CPC Class Codes: G11B 20/00768 wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
• CPC Class Codes: G11B 20/0084 wherein the usage restriction can be expressed as a specific time or date
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 23/281 : by changing the physical properties of the record carrier
• CPC Class Codes: G11B 23/284 : on the record carrier
• CPC Class Codes: G11B 23/34 : Signal means additional to the main recording track, e.g. photoelectric sensing of sprocket holes for timing
• CPC Class Codes: G11B 23/36 : Signals on record carriers or on containers and recorded by the same method as the main recording
• CPC Class Codes: G11B 7/0037 : with discs
• CPC Class Codes: G11B 7/00736 : Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082
• CPC Class Codes: G11B 7/00745 : Sectoring or header formats within a track formats in general G11B20/12
• CPC Class Codes: G11B 7/24038 : Multiple laminated recording layers
• CPC Class Codes: G11B 7/263 : Preparing and using a stamper, e.g. pressing or injection molding substrates production of optical record carriers, e.g. optical discs B29D17/005

Abstract

A recording type optical disk on which data is recordable includes a data recording and reproducing area for recording data therein and reproducing data therefrom, and a read-only disk identification information area for recording disk identification information for identifying the optical disk therein. In the optical disk, the disk identification information is formed by removing a reflection film that is formed on the optical disk in a strip shape. The disk identification information includes an inherent disk identifier for each optical disk, and the data recording and reproducing area includes an area for recording encrypted data therein. The encrypted data is encrypted by using information including the disk identification information for identifying the optical disk as a key.

Claims

1. An optical disk recording and reproducing apparatus for controlling at least one of:

(a) a recording operation for recording data in a data recording and reproducing area of an optical disk of recording type on which data is recordable, and (b) a reproducing operation for reproducing data from the data recording and reproducing area,

wherein said optical disk includes a disk identification information area for recording therein disk identification information for identifying said optical disk, and

wherein said optical disk recording and reproducing apparatus comprises;

reproducing means for reproducing said disk identification information from said disk identification information area; and

control means for judging whether or not at least one of the recording operation and the reproducing operation is performed based on the reproduced disk identification information, and for controlling said optical disk recording and reproducing apparatus to perform at least one of the recording operation and the reproducing operation in response to a judgment result.