SE9602656L - Ways to ensure the authenticity of an optical data carrier - Google Patents

Ways to ensure the authenticity of an optical data carrier

Info

Publication number
SE9602656L
SE9602656L SE9602656A SE9602656A SE9602656L SE 9602656 L SE9602656 L SE 9602656L SE 9602656 A SE9602656 A SE 9602656A SE 9602656 A SE9602656 A SE 9602656A SE 9602656 L SE9602656 L SE 9602656L
Authority
SE
Sweden
Prior art keywords
data carrier
logical
digital information
identity
authenticity
Prior art date
Application number
SE9602656A
Other languages
Swedish (sv)
Other versions
SE9602656D0 (en
Inventor
Jan Barchan
Original Assignee
Ifunga Test Equipment Bv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ifunga Test Equipment Bv filed Critical Ifunga Test Equipment Bv
Priority to SE9602656A priority Critical patent/SE9602656L/en
Publication of SE9602656D0 publication Critical patent/SE9602656D0/en
Priority to SE9603763A priority patent/SE514352C2/en
Priority to US09/214,632 priority patent/US6226770B1/en
Priority to ES97927540T priority patent/ES2152099T3/en
Priority to JP50511298A priority patent/JP3955634B2/en
Priority to DE69703155T priority patent/DE69703155T2/en
Priority to KR1019997000014A priority patent/KR100336253B1/en
Priority to EP97927540A priority patent/EP0907952B1/en
Priority to AT97927540T priority patent/ATE196561T1/en
Priority to PCT/SE1997/000957 priority patent/WO1998001852A1/en
Priority to TW086109370A priority patent/TW444194B/en
Publication of SE9602656L publication Critical patent/SE9602656L/en
Priority to JP2004213015A priority patent/JP4142618B2/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G11B20/00123—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • G11B7/00375—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs arrangements for detection of physical defects, e.g. of recording layer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • G11B7/00458—Verification, i.e. checking data during or after recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

The method involves selecting a predetermined number of logical symbols or bits at predetermined positions in the digital information to be stored on the data carrier prior to the manufacturing of the data carrier. The set of identity- representing errors are created on a logical level by replacing the selected symbols with corresponding symbols in a predetermined code sequence representing the identity of the data carrier, and the modified digital information is stored on the data carrier. The presence of at least a subset of the set of logical errors during reading without error correction of at least a part of the digital information on the disc is interpreted as an evidence of the data carrier having an identity determined by the set of logical errors.
SE9602656A 1996-07-05 1996-07-05 Ways to ensure the authenticity of an optical data carrier SE9602656L (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
SE9602656A SE9602656L (en) 1996-07-05 1996-07-05 Ways to ensure the authenticity of an optical data carrier
SE9603763A SE514352C2 (en) 1996-07-05 1996-10-14 Ways to provide an optical data carrier with identity information
PCT/SE1997/000957 WO1998001852A1 (en) 1996-07-05 1997-06-03 Method of providing an optical data carrier with identity information
JP50511298A JP3955634B2 (en) 1996-07-05 1997-06-03 Method for providing identification information to an optical data storage medium
ES97927540T ES2152099T3 (en) 1996-07-05 1997-06-03 Procedures to provide optical data support with identity information
US09/214,632 US6226770B1 (en) 1996-07-05 1997-06-03 Method of providing an optical data carrier with identity information
DE69703155T DE69703155T2 (en) 1996-07-05 1997-06-03 METHOD FOR PROVIDING AN OPTICAL DATA CARRIER WITH IDENTITY INFORMATION
KR1019997000014A KR100336253B1 (en) 1996-07-05 1997-06-03 Method of providing an optical data carrier with identity information
EP97927540A EP0907952B1 (en) 1996-07-05 1997-06-03 Method of providing an optical data carrier with identity information
AT97927540T ATE196561T1 (en) 1996-07-05 1997-06-03 METHOD FOR PROVIDING IDENTITY INFORMATION ON AN OPTICAL DATA CARRIER
TW086109370A TW444194B (en) 1996-07-05 1997-07-03 Method of providing an optical data carrier with identity information
JP2004213015A JP4142618B2 (en) 1996-07-05 2004-07-21 Method for checking identification information of an optical data storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9602656A SE9602656L (en) 1996-07-05 1996-07-05 Ways to ensure the authenticity of an optical data carrier

Publications (2)

Publication Number Publication Date
SE9602656D0 SE9602656D0 (en) 1996-07-05
SE9602656L true SE9602656L (en) 1998-01-06

Family

ID=20403285

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9602656A SE9602656L (en) 1996-07-05 1996-07-05 Ways to ensure the authenticity of an optical data carrier

Country Status (1)

Country Link
SE (1) SE9602656L (en)

Also Published As

Publication number Publication date
SE9602656D0 (en) 1996-07-05

Similar Documents

Publication Publication Date Title
SE9603763D0 (en) Ways to provide an optical data carrier with identity information
EP1519376B1 (en) Method for copy protecting a record carrier
DE69505794D1 (en) METHOD FOR CONVERTING M-BIT INFORMATION WORDS INTO A MODULATED SIGNAL, METHOD FOR PRODUCING A RECORDING CARRIER, ENCODING, DECODING, RECORDING AND READING DEVICE AND RECORDING CARRIER
BR8700714A (en) PROCESS OF STORAGE OF DIGITAL DATA WORDS IN A MAGNETIC MEDIA, PROCESS OF STORAGE OF DATA WORDS IN A MAGNETIC MEDIA AND MAGNETIC TAPE
AU757231B2 (en) A method, device and carrier for encoding multiword information
RU95121738A (en) METHOD FOR DIGITAL SIGNAL CODING AND DEVICE FOR ITS IMPLEMENTATION, DIGITAL SIGNAL RECORDING MEDIA, AND METHOD FOR DIGITAL SIGNAL RECORDING AND DEVICE FOR ITS IMPLEMENTATION
AU2334988A (en) Encoding apparatus and method for error correction
US20020099984A1 (en) High efficiency, error minimizing coding strategy method and apparatus
SE9602656L (en) Ways to ensure the authenticity of an optical data carrier
WO2006067405A1 (en) Copy protection for optical discs
EP0936612A3 (en) Optical disc recording/reproducing method, optical disc and optical disc device
MY115920A (en) Data storage disk with information encoded in the position error signal fields
EP1018115B1 (en) A method for producing an optical registration carrier by means of a master mould, a device suitable for carrying out such a method, an optical registration carrier, a method for verifying such an optical registration carrier
ATE405930T1 (en) CODE WORD FOR USE IN DIGITAL-OPTICAL MEDIA AND METHOD FOR GENERATION
HU223894B1 (en) A method for encoding multiword information by error protection,a method for decoding such information, a device for encoding and/or data carrier thereto
US6717899B1 (en) Optical disc hidden data technique
CN100411050C (en) Data error correcting unit and method thereof
US20090067311A1 (en) Method and apparatus for recording secondary information on a record carrier
PT792504E (en) TRANSFER OF INFORMATION THROUGH THE ENTRY AREA OF A INFORMATION TRANSPORTER
CN1381053A (en) Method for encoding stream of bits of binary source signal into stream of bits of binary channel signal

Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 9602656-2

Format of ref document f/p: F