GB2373091A - Copy protection - Google Patents

Copy protection Download PDF

Info

Publication number
GB2373091A
GB2373091A GB0212386A GB0212386A GB2373091A GB 2373091 A GB2373091 A GB 2373091A GB 0212386 A GB0212386 A GB 0212386A GB 0212386 A GB0212386 A GB 0212386A GB 2373091 A GB2373091 A GB 2373091A
Authority
GB
United Kingdom
Prior art keywords
identity
copy protection
media
software
bad sectors
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB0212386A
Other versions
GB0212386D0 (en
Inventor
Donald Eric Butterfield
Original Assignee
Donald Eric Butterfield
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 Donald Eric Butterfield filed Critical Donald Eric Butterfield
Priority to GB0212386A priority Critical patent/GB2373091A/en
Publication of GB0212386D0 publication Critical patent/GB0212386D0/en
Publication of GB2373091A publication Critical patent/GB2373091A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0092Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors
    • G11B20/00927Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors wherein said defects or errors are generated on purpose, e.g. intended scratches
    • G11B20/00949Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors wherein said defects or errors are generated on purpose, e.g. intended scratches said intentional errors occurring due to bad sectors, which are either physically destroyed or which are declared defective in the defect management information
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00659Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a control step which is implemented as an executable file stored on the record carrier
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0092Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors
    • G11B20/00927Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors wherein said defects or errors are generated on purpose, e.g. intended scratches

Abstract

Increased copy protection on media such as CD's, by the creation of a physical identity checked by software on the media. This identity could be by marks creating what is known as bad sectors. Software will have the tracks that contain the bad sectors scanned. The scan will produce addresses from the disc where the bad sectors are located. If the scan results match that recorded when the software was written the program continues to load. If the match does not agree the disc will abort loading. The advantage of using a physical identity such as bad sectors is that it cannot be copied in the normal way and loading will not complete if the correct identity cannot be established thus enhancing copy protection. This system will be contained solely on the media and require no external checking.

Description

Copy Protection At present it is possible to make illegal copies of computer programs, music and films. All of the current forms of protection can be overcome. Illegal copying is wide spread.

This invention sets out to make illegal copies on Compact Discs, DVD's, Mini Discs and Optical Discs far harder to achieve.

The method used to increase the copy protection of the abovementioned discs involves the creation of a series of marks on a track or tracks of the disc concerned. These marks will be read as Bad Sectors on the disc. It is intended that the marks give the disc a unique identity in the same way that a bar code is used to identify a product. This identity achieved by the"bad sectors" is checked by software written onto the disc. The software will have the tracks that contain the bad sectors scanned. The scan will produce addresses from the disc where the bad sectors are located. The software will then check the result of the scan. If the scan results match that recorded when the software was written the program continues to load. If the match does not agree the disc will abort loading. This method can be used in addition to other security measures that already exist. The software may run this check at different stages of loading the program to further increase security. The advantage of using bad sectors is that a bad sector cannot be copied. If a disc protected by the above mentioned, methods is copied; the copy will not complete loading because it will not carry the identity conferred by the bad sectors.

As media may change over years the principles set out above of creating a hardware identity onto the media can be employed onto the new media types.

An example of a compact disc using this form of protection would have one track with three bad sectors very close together.

Each of these bad sectors would be lmm long with 2mm between each bad sector. A further bad sector would be inserted On the same track but 5mm from the previous bad sector in a clockwise direction. This bad sector would be 4mm long. This sequence is repeated on the same track but directly opposite the first set of bad sectors. This is to balance the disc as it rotates so that it does not become unstable. This track can be on any position of the disc considered to be appropriate although in most cases it would be close to the center where the centrifugal force is reduced. In some cases it maybe necessary for the software to run the drive at a slower spin speed. After loading part of the program the software would then run a check on the track containing the bad sectors. If a match is confirmed the software continues to load; if a match is not achieved the program aborts loading. Another disc could have a sequence like a dotted line of bad sectors on an entire track to balance it out completely: identity achieved by both the length of the bad sectors on the track and the spaces between them and also by the track itself.

Claims (5)

  1. CLAIMS 1. A copy protection system that uses a physical marking on the media concerned to create an identity: the identity is checked by software written onto the media; if the identity matches that contained in the software loading continues, if the identity does not match loading is aborted.
  2. 2. A copy protection system as claimed in claim 1 that can be used in addition to other security measures.
  3. 3. A copy protection system as claimed in claim 1 and claim 2 that may run an identity check more than once during loading.
  4. 4. A copy protection system as claimed in claim 1, claim 2, and claim 3 where the identity on the disc maybe achieved by the use of what is known as"bad sectors"on the tracks.
  5. 5. A copy protection system as claimed in claim 1, claim 2, claim 3 and claim 4 that is contained solely on the media and requires no external checking.
GB0212386A 2002-05-29 2002-05-29 Copy protection Withdrawn GB2373091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0212386A GB2373091A (en) 2002-05-29 2002-05-29 Copy protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0212386A GB2373091A (en) 2002-05-29 2002-05-29 Copy protection

Publications (2)

Publication Number Publication Date
GB0212386D0 GB0212386D0 (en) 2002-07-10
GB2373091A true GB2373091A (en) 2002-09-11

Family

ID=9937650

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0212386A Withdrawn GB2373091A (en) 2002-05-29 2002-05-29 Copy protection

Country Status (1)

Country Link
GB (1) GB2373091A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004084487A1 (en) * 2003-03-17 2004-09-30 Pedro Gallego Rubio Personal network identification method using a cd-card
EP1551022A1 (en) * 2003-12-29 2005-07-06 Sony International (Europe) GmbH Method for copy protection of digital content
WO2005069293A1 (en) * 2004-01-14 2005-07-28 Sgn Method of preventing unauthorized duplication of optical disc by physical authentication, manufacturing process of such optical disc and optical disc thus obtained
WO2005078721A1 (en) * 2004-02-12 2005-08-25 Koninklijke Philips Electronics N.V. Reproduction apparatus and method for reproducing a unique medium identifier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131580A (en) * 1982-11-08 1984-06-20 Vault Corp Frustrating the unauthorized copying of recorded data
NL8703032A (en) * 1987-12-15 1989-07-03 Christian Alexander Oudshoorn A method for protecting against unauthorized copying of on one by one processing device accessible way on an information carrier stored information; and device for manufacturing of such protected information carriers, respectively, secure carrier obtained with the aid of the method or the device according to the invention.
WO1998054713A1 (en) * 1997-05-30 1998-12-03 Ç-Dilla Limited Method for copy protecting a record carrier, copy protected record carrier and means for detecting access control information
WO2001086650A1 (en) * 2000-05-10 2001-11-15 Koninklijke Philips Electronics N.V. Copy protection system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131580A (en) * 1982-11-08 1984-06-20 Vault Corp Frustrating the unauthorized copying of recorded data
NL8703032A (en) * 1987-12-15 1989-07-03 Christian Alexander Oudshoorn A method for protecting against unauthorized copying of on one by one processing device accessible way on an information carrier stored information; and device for manufacturing of such protected information carriers, respectively, secure carrier obtained with the aid of the method or the device according to the invention.
WO1998054713A1 (en) * 1997-05-30 1998-12-03 Ç-Dilla Limited Method for copy protecting a record carrier, copy protected record carrier and means for detecting access control information
WO2001086650A1 (en) * 2000-05-10 2001-11-15 Koninklijke Philips Electronics N.V. Copy protection system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004084487A1 (en) * 2003-03-17 2004-09-30 Pedro Gallego Rubio Personal network identification method using a cd-card
ES2224841A1 (en) * 2003-03-17 2005-03-01 Pedro Gallego Rubio Procedure for verification of electronic signature through network.
EP1551022A1 (en) * 2003-12-29 2005-07-06 Sony International (Europe) GmbH Method for copy protection of digital content
US7672454B2 (en) 2003-12-29 2010-03-02 Sony Deutschland Gmbh Method for copy protection of digital content
WO2005069293A1 (en) * 2004-01-14 2005-07-28 Sgn Method of preventing unauthorized duplication of optical disc by physical authentication, manufacturing process of such optical disc and optical disc thus obtained
WO2005078721A1 (en) * 2004-02-12 2005-08-25 Koninklijke Philips Electronics N.V. Reproduction apparatus and method for reproducing a unique medium identifier

Also Published As

Publication number Publication date
GB0212386D0 (en) 2002-07-10

Similar Documents

Publication Publication Date Title
EP1493156B1 (en) Copy protection system for data carriers
US6748537B2 (en) System and method for controlling the use and duplication of digital content distributed on removable media
JP3405980B2 (en) Copy protection of digital audio compact disk
CN100458961C (en) Recording method of recording medium, output control method, reproducing apparatus, recording/reproducing control method
EP1152412B1 (en) Recording medium, data recording method and apparatus, data reproducing method and apparatus
KR100464471B1 (en) Copy guard system with m type
US6122739A (en) Digital compact disc player security system reproducing method and apparatus
CN1140118C (en) Method and apparatus for copy protection for various recording media using video finger print
US7057993B2 (en) Copy protection using multiple security levels on a programmable CD-ROM
CA2245232C (en) Optical disc copy management system
EP1482498A2 (en) Copy protection of optical media
US5703858A (en) System for encoding a glass master to enable detection of a counterfeit optical CD-ROM
US7035198B2 (en) Optical recording medium, recording apparatus and method for optical recording medium, and reproducing apparatus and method for optical recording medium
US4748561A (en) Method of protecting computer software
US20020114241A1 (en) Optical disk, and recording/reproducing apparatus and recording method for optical disk
ES2303025T3 (en) Procedure to protect a recording support against copying.
CN1945720B (en) System and method for restoring material on electronic media player
US6957343B2 (en) Validating keying material by using a validation area of read-only media to prevent playback of unauthorized copies of content stored on the media
GB2371916B (en) Copy-protected digital audio compact disc, and method and system for producing same
AU775190B2 (en) Record carrier of a read-only type and read device
US20020159591A1 (en) The copy protection of digital audio compact discs
KR100371672B1 (en) Optical disk, method of reproducing and copying optical disk, and method of preventing illegal use of optical disk
CN100367247C (en) Method for managing copy protection information of recordingmedium
KR19990063546A (en) How to protect the copyright of the digital recording medium and apparatus and, that the digital recording medium,
JP3955634B2 (en) Method for providing identification information to an optical data storage medium

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)