Apparatus and method for data security in an optical disk storage system

• US 5,489,768 A
• Filed: 12/31/1992
• Issued: 02/06/1996
• Est. Priority Date: 12/20/1991
• Status: Expired due to Term

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Lentz, Joseph P., Kline, Patrick J., Brownstein, Scott A., Cushman, Thomas R.
• Primary Examiner(s): PITTS, HAROLD I
• Application Number:
  US07/999,626
• Time in Patent Office: 1,132 Days
• Field of Search: 235/462, 235/375, 235/487, 235/454, 250/566, 369/33
• US Class Current: 235/462.01
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• 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 20/00268 said barcode being recorded in a burst cutting area [BCA]
• CPC Class Codes: G11B 20/00876 wherein physical copy protection means are attached to the medium, e.g. holograms, sensors, or additional semiconductor circuitry
• CPC Class Codes: G11B 20/00927 wherein said defects or errors are generated on purpose, e.g. intended scratches
• CPC Class Codes: G11B 23/284 on the record carrier
• CPC Class Codes: G11B 23/38 Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
• 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 7/24 Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the arrangement of information on the carrier G11B7/007
• CPC Class Codes: G11B 7/26 Apparatus or processes specially adapted for the manufacture of record carriers

Abstract

An optical storage disk for use in an optical storage system includes a storage layer which is capable of being disrupted when a laser beam of sufficient intensity is focused thereon. The optical storage disk has a transparent substrate layer on one side of the storage layer and a lacquer layer on the other side of the storage layer. The disruptions provided by the laser beam are selected to provide human readable and/or machine readable patterns. To reduce the damage to portions of the optical disk other than the storage layer, the storage layer is exposed to the laser beam prior to curing, or prior to applying and curing the lacquer layer. The optical disk can be of the type with data written thereon during fabrication, or the disk can be of the type in which data can be impressed thereon after fabrication of the optical disk. The patterns on the optical disk can be in the form of optical bar codes.

Claims

1. An optical information and retrieval system comprising:

an optical information storage medium, said medium including a support material and a storage material, said storage material having a plurality of files, including at least one control file and at least one data file, stored therein, wherein said control file includes a medium identification signal group and said data file includes a data identification signal group, and wherein said optical information medium further includes identification numbers embedded therein;

an interaction means for interacting with said medium, said interaction means including;

optical interaction means for interacting with said plurality of files and with said embedded identification numbers to provide information signals representative of information is said files and of said embedded identification numbers; and

processing means coupled to said optical interaction means for comparing said information signals to determine if said medium identification signal group corresponds to said embedded identification numbers, said processing means comparing said information signals after initiation of an interaction between said optical interaction means and said medium, wherein said processing means to provides a control signal to said optical interaction means to prevent further interaction between said optical interaction means and said medium when the comparison of said information signals indicates that said medium identification signal group does not correspond with said embedded identification numbers.

2. The optical information and retrieval system of claim 1, wherein said embedded identification numbers are in an optical bar code format, and wherein said optical interaction means includes a read/write head for detecting preselected optical properties of regions in said storage material, and an optical bar code reader for identifying said embedded identification numbers.

3. The optical information and retrieval system of claim 2, wherein said optical information storage medium comprises a writable optical disk, and wherein each section of a character of said embedded identification numbers having said bar code format has a cross-section of constant radius which is proportional to said radius.

4. The optical information and retrieval system of claim 2, wherein said optical information storage medium is an optical disk.

5. The optical information and retrieval system of claim 1 wherein said plurality of files on said optical information storage medium includes a translation file for translating files transferred between said optical information storage medium and said interaction means into a form usable by a target component.

6. The optical information and retrieval system of claim 1, wherein said processing means includes a system identification signal group associated with said interaction means, and compares said system identification signal group with the information representative of said embedded identification numbers to determine whether said system identification signal group corresponds with said embedded identification numbers prior to processing files associated with said optical information storage medium.

7. The optical information and retrieval system of claim 1, wherein said processing means compares said information signals to determine if said medium identification signal group corresponds with said file identification signal group, wherein said processing means provides a control signal to said optical interaction means to prevent further interaction between said optical interaction means and said medium when the comparison of said information signals indicates that said medium identification signal group does not correspond with said file identification signal group.

8. The optical information and retrieval system of claim 6, wherein said processing means compares said information signals to determine if said medium identification signal group corresponds with said file identification signal group, wherein said processing means provides a control signal to said optical interaction means to prevent further interaction between said optical interaction means and said medium when the comparison of said information signals indicates that said medium identification signal group does not correspond with said file identification signal group.