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WO2003015088A1 - Procede d'authentification de cd - Google Patents

Procede d'authentification de cd Download PDF

Info

Publication number
WO2003015088A1
WO2003015088A1 PCT/GB2002/003710 GB0203710W WO03015088A1 WO 2003015088 A1 WO2003015088 A1 WO 2003015088A1 GB 0203710 W GB0203710 W GB 0203710W WO 03015088 A1 WO03015088 A1 WO 03015088A1
Authority
WO
WIPO (PCT)
Prior art keywords
lengths
pits
cds
lands
standard
Prior art date
Application number
PCT/GB2002/003710
Other languages
English (en)
Inventor
Jonathan Michael Blackledge
Johnson W.N.H.
Original Assignee
Durand Technology Limited
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
Priority claimed from GB0119589A external-priority patent/GB0119589D0/en
Application filed by Durand Technology Limited filed Critical Durand Technology Limited
Publication of WO2003015088A1 publication Critical patent/WO2003015088A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
    • G06F21/80—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in storage media based on magnetic or optical technology, e.g. disks with sectors
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G11B19/122—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of an identification or authentication mark
    • 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
    • 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
    • G11B20/00115—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers wherein the record carrier stores a unique medium identifier
    • 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
    • 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
    • G11B20/00166—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software
    • G11B20/00173—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software wherein the origin of the content is checked, e.g. determining whether the content has originally been retrieved from a legal disc copy or another trusted source
    • 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
    • G11B20/00188—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record 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
    • G11B20/00188—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
    • G11B20/00195—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier using a device identifier associated with the player or recorder, e.g. serial numbers of playback apparatuses or MAC addresses
    • 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • G11B20/00217—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
    • G11B20/00224—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is obtained from a remote server
    • 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
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00586—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium
    • 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
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00586—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium
    • G11B20/00594—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium wherein the shape of recording marks is altered, e.g. the depth, width, or length of pits
    • 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
    • G11B20/00855—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a step of exchanging information with a remote server
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10212—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter compensation for data shift, e.g. pulse-crowding effects
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • G11B2020/1461—8 to 14 modulation, e.g. the EFM code used on CDs or mini-discs
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
    • G11B2020/1836—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information using a Reed Solomon [RS] code
    • G11B2020/184—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information using a Reed Solomon [RS] code using a cross-interleaved Reed Solomon [CIRC]

Definitions

  • THIS INVENTION relates to a method of checking the source of CDs as herein defined and/or for checking for unauthorised copies of CDs.
  • CDs Compact Discs
  • Digital Versatile Disc DVDs
  • CDs Compact Discs
  • Digital Versatile Discs DVDs
  • CDs are now a familiar medium for carrying data in digital form, whether digitally recorded sound or computer data.
  • a sophisticated version of the CD, the "Digital Versatile Disc” DVD is now also available which utilises substantially the same principles but provides a denser packing of information and thus makes it possible to store, in digital form, a larger amount of data, for example embodying full length cinema presentations, on a single disc.
  • CD is also intended to include such DVDs.
  • a light-reflective disc e.g. of plastics sheet material with a metalised reflecting layer incorporated therein
  • the digital recording or data stored comprises an extended spiral "track" of such pits, i.e. a track extended in much the same way as that on the gramophone discs which were once the accepted medium for recorded music.
  • the configuration of a CD is complex and a CD track comprises pits of various lengths selected from nine "standard" lengths.
  • These lengths are herein also referred to as "clap-lengths". These pits are derived from corresponding features in a "master”, formed in a manufacturing process in which, inter alia a counterpart to the CD track is recorded by means of a laser beam on a rotating disk in a recording machine.
  • the 'clap-lengths' can be thought of in terms of lines of different length over which the opacity or reflectivity of the material changes. These Tines' are arranged over the entire spiral of the CD to give a continuous stream of data. In terms of data representation, the lines form a run-length code ' from which a bit stream is then extracted.
  • CDs may be made using "write-once" recordable CD technology in which streaks or bars of a contrasting colour to a background colour are formed by a laser in a recording/writing device, or may be made using re-write technology, in which variations in reflectivity are induced reversibly in any of various ways by a writing laser are used to provide marks which, to a "standard” CD player or "CD ROM” data reading device, simulate the pits referred to in the mass- produced CDs.
  • the master in a conventional CD ROM production technique, like the "write- once" and “re-write” systems referred to, relies upon a writing technique in which a disc is rotated according to a standard scheme of rotary movement, (the rotational rate is not constant but is generally varied throughout recording to achieve a generally uniform velocity of the spiral track through the focus of the writing laser), and a laser beam is focused onto the surface of the master and is switched on or off to provide the features and intervening spaces in the respective master, which will correspond to the pits and intervening "lands" in the manufactured CD.
  • CD recorder there may be considerable variation from CD recorder to CD recorder in deviations from the actual positions (times, in terms of the replay signal) in the CD track at which transitions from pit to successive land or from land to successive pit occur, as compared with the notional product of an ideal, perfect, recording machine.
  • a method of authenticating CDs comprising measuring precisely the lengths of the pits corresponding to the several "standard” pits, i.e. measuring precisely the respective "clap-lengths", and/or of the lands between such pits, and/or comprising measuring precisely the positions of the ends of such pits, (i.e. of the transitions between pits and lands) relative to their notional ideal positions, performing a statistical or other mathematical analysis on the resulting measurements to establish averages, distributions and/or other statistical measures, and comparing the results of corresponding results for CDs from the totality of legitimate sources, to determine the likelihood that the CD emanates from any of the legitimate sources.
  • a method of authenticating CDs comprising measuring precisely the lengths of the pits corresponding to the several "standard” pits, i.e. measuring precisely the respective "clap-lengths", and/or of the lands between such pits, and/or comprising measuring precisely the positions of the ends of such pits, (i.e. of the transitions between pits and lands) relative to their notional ideal positions, to establish a statistical fingerprint or phase portrait based on chaotic data analysis using appropriate phase spaces and/or other standard and/or Levy statistical measures, and comparing the results with corresponding results for CDs from the totality of legitimate sources, to determine the likelihood that the CD emanates from any of the legitimate sources.
  • Copying a CD or DVD leads to a copy CD or DVD having the same (binary) information as the copied CD.
  • the physical nature (i.e. the laser burn) of the copy can be different from one replicator to another due to the natural 'jitter' of the copier, i.e. the natural errors that occur in the mechanics of the copier and the (laser) modulator.
  • 'jitter' introduced by a replicator has a unique statistical signature which may be determined by carrying out operation such as computing the population density of the 'clap-lengths'.
  • the 'clap-lengths' are the lengths of the laser burn on the CD - from T3 to Tl 1.
  • the procedure involved may be as follows:
  • the method requires only that the 'clap-lengths' on the CD can be measured and that a data base of the frequency distributions associated with authorised replicators is available for cross-correlation.
  • the procedure involved in a preferred embodiment of the invention may be as follows: (i) compute the phase portrait for lands and pits on the entire CD, or possibly over only part of the CD;
  • the method requires only that the 'clap-lengths' on the CD can be measured and that a data base of the phase portraits, for lands and pits, associated with authorised replicators is available for cross-correlation.
  • a consumer - oriented CD ROM drive or a computer incorporating such a CD ROM drive may be arranged to carry out or participate in the method of the present invention by being designed to, or adapted to make the measurements and collect the data forming the basis for such a statistical fingerprint or phase portrait, and possibly to carry out part or all of the necessary processing of such data.
  • a computer incorporating such a CD ROM drive may be used in a download protection scheme, so that when a CD bearing software from, or purporting to be from, a software supplier, is loaded into the CD ROM for loading into the computer, the software will only be loaded after the fingerprint or phase portrait of the CD ROM has been checked against a database of legitimate replicators, eg.
  • the "signature", "fingerprint” or “portrait” of the CD can be uploaded and checked centrally on a database and then key additional files or file changes made to enable the software to be loaded onto the user's machine.
  • the extracting of analogue data and computation of the signature can, it is believed, be carried out very quickly as the applicants believe it should only be necessary to measure the first 10,000 pits or so on the disk to get the mass of data needed.
  • phase spaces or phase portraits can form the basis for the pattern recognition approach to identify the 'fingerprint' of an authorised CD replicator.
  • fingerprints can be collated into a database of templates from which a CD can be validated.
  • the method requires only that the 'clap-lengths' on the CD can be measured and that a database of the phase space templates associated with the authorised replicators is available for cross-correlation.
  • the laser pickup When a standard player reads a CD/DVD the laser pickup receives an analogue signal corresponding to the interference of the laser light caused by the pits. The analogue signal then is converted into a digital signal and is passed to an
  • EFM eight to fourteen modulation
  • CIRC cross interleaved Reed-Solomon code
  • the subcode is added at the recording stage and extracted at the reading stage to designate the subcode channels P,Q,R,S,T,U,V and W. For example the P subcode is used to indicate silence between tracks.
  • the acquisition of the "fingerprint” or “portrait” referred to is carried out using the analogue signal referred to above, before digitisation.
  • This analogue signal comprises a series of run lengths (the electrical counterparts of the pits in the CD), measured in time (pico seconds or equivalent depending upon the speed). The variation in these run lengths may be used for the "fingerprint” analysis. It is envisaged that before spirming the disk to full speed, which can be 40x or more, the raw data will be measured for the first part of the disc at lx and the validation process started.
  • This validation could be routinely undertaken so that the fingerprint of the CD DVD is automatically taken when it is inserted into a reader. Using various methods, such as on-line registration, this fingerprint could be compared with authentic fingerprints so that counterfeits would not be loaded. In another embodiment authentic fingerprints could included on the CD/DVD but encoded in such a way that a counterfeiter could not add a fictitious fingerprint to the database. On CD music players and DVD players this would mean changes to the design of the software within the machine. Validation on a PC would be easier to accomplish because of the ease with which software can be modified and loaded onto it. For stand-alone CD/DVD players a new chip may be needed.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

L'invention concerne un procédé d'authentification de CD consistant à mesurer de manière précise les longueurs des alvéoles correspondant à la pluralité de longueurs « normalisées », de « longueurs T » ou de « longueurs clap» et/ou d'intersillons situés entre de telles alvéoles, à effectuer une analyse statistique des longueurs mesurées de telles alvéoles et/ou intersillons, de manière à établir des moyennes, des distributions et/ou d'autres mesures statistiques et à comparer les résultats des résultats correspondant pour des CD issus de l'ensemble des sources légitimes, de manière à déterminer les probabilités que le CD provienne d'une de ces sources légitimes quelconques. Le procédé peut également, ou de manière alternative, consister à mesurer de manière précise les positions des extrémités des alvéoles dans la piste du CD (c'est-à-dire les transitions entre des alvéoles et des intersillons) par rapport à leurs positions idéales en théorie, de manière à obtenir des données destinées à la dérivation de l''empreinte' souhaitée. Le procédé peut également être mis en oeuvre dans un schéma de protection contre la copie ou dans un schéma d'authentification de logiciel.
PCT/GB2002/003710 2001-08-10 2002-08-12 Procede d'authentification de cd WO2003015088A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0119589A GB0119589D0 (en) 2001-08-10 2001-08-10 Method of authenticating cds
GB0119589.0 2001-08-10
GB0210744A GB0210744D0 (en) 2001-08-10 2002-05-10 Method of authenticating CDs
GB0210744.9 2002-05-10

Publications (1)

Publication Number Publication Date
WO2003015088A1 true WO2003015088A1 (fr) 2003-02-20

Family

ID=26246432

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Application Number Title Priority Date Filing Date
PCT/GB2002/003710 WO2003015088A1 (fr) 2001-08-10 2002-08-12 Procede d'authentification de cd

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Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006021904A3 (fr) * 2004-08-27 2006-05-18 Koninkl Philips Electronics Nv Support d'enregistrement, procede d'enregistrement et dispositif de lecture pour le controle de droit d'auteur
EP1672631A1 (fr) * 2004-12-14 2006-06-21 Sony DADC Austria AG Signature pour l'authentification de disque
WO2007072351A3 (fr) * 2005-12-19 2007-10-25 Koninkl Philips Electronics Nv Procede pour l'ecriture de donnees ayant un trait distinctif
WO2007069164A3 (fr) * 2005-12-15 2007-11-22 Koninkl Philips Electronics Nv Méthode d’enregistrement de données ayant une caractéristique distinctive
EP1909277A1 (fr) 2006-10-02 2008-04-09 Sony DADC Austria AG Procédé, logique de commande et système pour détecter un volume de stockage virtuel et support de données

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US4734796A (en) * 1983-04-14 1988-03-29 Amiram Grynberg Technique for preventing unauthorized copying of information recorded on a recording medium and a protected recording medium
EP0635828A1 (fr) * 1993-07-22 1995-01-25 Victor Company Of Japan, Limited Disque optique et appareil d'enregistrement et/ou de reproduction avec fonction de protection contre le tirage
US5809006A (en) * 1996-05-31 1998-09-15 Cagent Technologies, Inc. Optical disk with copy protection, and apparatus and method for recording and reproducing same
EP0866454A2 (fr) * 1997-03-19 1998-09-23 Sony Corporation Appareil d'enregistrement, appareil de reproduction et support d'enregistrement optique
US5881038A (en) * 1994-04-18 1999-03-09 Matsushita Electric Industrial Co., Ltd. Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium
WO1999035641A1 (fr) * 1997-12-30 1999-07-15 Ç-Dilla Limited Procede et appareil permettant de determiner la provenance d'un disque portant des donnees
US5949749A (en) * 1996-08-28 1999-09-07 Pioneer Electronic Corporation Optical disk, reproducing device and recording device therefor
EP0989553A2 (fr) * 1998-09-21 2000-03-29 Victor Company Of Japan, Ltd. Appareil d'enregistrement d'information et méthode associée, appareil de reproduction d'information, appareil de protection d'information, et support d'enregistrement d'information

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4734796A (en) * 1983-04-14 1988-03-29 Amiram Grynberg Technique for preventing unauthorized copying of information recorded on a recording medium and a protected recording medium
EP0635828A1 (fr) * 1993-07-22 1995-01-25 Victor Company Of Japan, Limited Disque optique et appareil d'enregistrement et/ou de reproduction avec fonction de protection contre le tirage
US5881038A (en) * 1994-04-18 1999-03-09 Matsushita Electric Industrial Co., Ltd. Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium
US5809006A (en) * 1996-05-31 1998-09-15 Cagent Technologies, Inc. Optical disk with copy protection, and apparatus and method for recording and reproducing same
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EP0866454A2 (fr) * 1997-03-19 1998-09-23 Sony Corporation Appareil d'enregistrement, appareil de reproduction et support d'enregistrement optique
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WO2006021904A3 (fr) * 2004-08-27 2006-05-18 Koninkl Philips Electronics Nv Support d'enregistrement, procede d'enregistrement et dispositif de lecture pour le controle de droit d'auteur
EP1672631A1 (fr) * 2004-12-14 2006-06-21 Sony DADC Austria AG Signature pour l'authentification de disque
US7773495B2 (en) 2004-12-14 2010-08-10 Sony Dadc Austria Ag Disc signature for disc authentication
CN1822180B (zh) * 2004-12-14 2011-11-16 索尼达德克奥地利股份公司 用于盘鉴别的盘签名
WO2007069164A3 (fr) * 2005-12-15 2007-11-22 Koninkl Philips Electronics Nv Méthode d’enregistrement de données ayant une caractéristique distinctive
WO2007072351A3 (fr) * 2005-12-19 2007-10-25 Koninkl Philips Electronics Nv Procede pour l'ecriture de donnees ayant un trait distinctif
EP1909277A1 (fr) 2006-10-02 2008-04-09 Sony DADC Austria AG Procédé, logique de commande et système pour détecter un volume de stockage virtuel et support de données
WO2008040440A1 (fr) * 2006-10-02 2008-04-10 Sony Dadc Austria Ag Procédé, logique de commande et système pour détecter un volume de stockage virtuel et support de données
US8429345B2 (en) 2006-10-02 2013-04-23 Sony Dadc Austria Ag Method, control logic and system for detecting a virtual storage volume and data carrier

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