WO2005098832A2 - Procede permettant de contourner les protections contre la copie des dvd - Google Patents

Procede permettant de contourner les protections contre la copie des dvd Download PDF

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Publication number
WO2005098832A2
WO2005098832A2 PCT/US2005/009919 US2005009919W WO2005098832A2 WO 2005098832 A2 WO2005098832 A2 WO 2005098832A2 US 2005009919 W US2005009919 W US 2005009919W WO 2005098832 A2 WO2005098832 A2 WO 2005098832A2
Authority
WO
WIPO (PCT)
Prior art keywords
disc
copy
copy protection
optical disc
copying
Prior art date
Application number
PCT/US2005/009919
Other languages
English (en)
Other versions
WO2005098832A3 (fr
Inventor
Bradley Thomas Collar
Original Assignee
Warner Bros. Entertainment Inc.
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 Warner Bros. Entertainment Inc. filed Critical Warner Bros. Entertainment Inc.
Publication of WO2005098832A2 publication Critical patent/WO2005098832A2/fr
Publication of WO2005098832A3 publication Critical patent/WO2005098832A3/fr

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Classifications

    • 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
    • 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
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information

Definitions

  • This invention pertains to a method of foiling the prevention of copying of a DVD, the prevention method being described in my co-pending application S.N. filed on and based on U.S. Provisional application S.N.
  • DVD burners have become available that can write data on blank (recordable) DVD discs.
  • Some DVD burner software allows a user to make an unauthorized copy on a recordable DVD of the programming content of an original or prerecorded DVD.
  • certain prerecorded DVDs have anti-copying protection, such as CSS, that anti-copying mechanism has been compromised.
  • At least one company, 321aries of St. Charles, Missouri is or was selling software called DVD X-COPY that can be used to make a second generation copy of an original DVD.
  • the software will not make additional copies from the second generation copy.
  • the reasoning (albeit a flawed one) is that one archival copy should be allowed, but not rampant copying. This is obviously unsatisfactory because an unlimited number of second generation copies can be made from the first generation original pressed disc.
  • the DVD X-COPY software writes a file that it calls 'archive.txt' on any disc that it makes. Then, the software always looks for that file in a disc that it is called upon to copy, and will make a copy of the disc only if does not contain an archive.txt, or other similar copy protection indication. If the copy protection indication is found, the software is made aware that the disc it is being asked to copy is itself a copy, and should not be copied. My copy protection invention places the archive.txt file, or any file used for a similar purpose, on an original disc. If a first generation disc is placed in a DVD burner, the software mistakenly thinks that it is a second generation copy and will not copy it.
  • the above-described copy protection technique is foiled by including in the burning software a routine that checks whether the disc is an original disc or is a recordable disc (e.g., DVD-R) on which a copy has been made. If the disc is an original disc (e.g., a DVD-VIDEO), then software does not look for a copy protection indication, but proceeds to copy the original DVD. Therefore, even if the copy protection indication is present, a copy is made. Only if the disc is recordable and includes a copy protection indication, is making a copy barred.
  • a routine that checks whether the disc is an original disc or is a recordable disc (e.g., DVD-R) on which a copy has been made. If the disc is an original disc (e.g., a DVD-VIDEO), then software does not look for a copy protection indication, but proceeds to copy the original DVD. Therefore, even if the copy protection indication is present, a copy is made. Only if the disc is recordable and includes a copy protection indication, is
  • Fig. 1 shows how data is organized on a prior art first generation DVD
  • Fig. 2 shows how a first generation DVD is burned using existing software
  • Fig. 3 shows how data is organized on a prior art first generation DVD
  • Fig. 4 shows how data is organized on a first generation DVD in accordance with this invention
  • Fig. 5 shows how the flow chart of Fig. 2 can be modified to foil my copy protection method.
  • a prerecorded or pressed DVD like most other types of data storage media, has data files organized in a hierarchical directory system. More specifically, an original DVD has a ROOT directory with a VIDEO _TS subdirectory.
  • the VIDEO_TS subdirectory includes the normal components of a multimedia presentation, such as video object files identified as *.vob, navigational information files identified as *.ifo, and backup files, identified as *.bup.
  • this type of disc is referred to as an original or first generation disc.
  • the DVD X-COPY software can be used to make second generation DVDs, but not third generation DVDs (where the second generation DVD is made by DVD X-Copy).
  • step 100 the original DVD is loaded into the DVD burner.
  • step 102 the program looks for a copy protection file.
  • the copy protection file is one that the software itself writes to a recordable disc when making a second generation copy of an original disc (see step 106 below). Therefore, the copy protection file is not found on a standard original disc. If no file is found in step 104, then the making of a disc copy is permitted. In step 106 a copy protection indication file is generated.
  • the file may include some standard text and information indicating what software was used, the software version, the date on which the file was generated, flags indicating rules governing whether the file can be copied (e.g., "copy never,” “copy once,” “unrestricted copying") etc.
  • the copy protection file can even contain no information in the case where (as in the case of DVD X-COPY) the software merely looks for the file's presence (in step 104), but not any specific content of the file.
  • the software calls this file "archive.txt”.
  • step 108 the contents of the original DVD are copied on a recordable DVD to make the second generation copy.
  • the copy protection file archive.txt is created and recorded on the second generation copy.
  • Fig. 3 shows the data on the second generation DVD.
  • the copy protection file (archive.txt) is shown in the ROOT directory.
  • this or similar files can be placed anywhere else on the DVD as well so long as the playback of the DVD on a standard player device will not be impaired.
  • step 104 when a second generation DVD is inserted into the DVD burner, in step 104 the copy protection file is found.
  • the software generates a fault message indicating that copying of this DVD is not permitted, and the software will not copy the DVD.
  • the overall sequencing does not prevent a user from making multiple second generation DVDs from an original DVD.
  • an original DVD is made in a way that it is mistakenly recognized by copying software, such as DVD X-COPY, as being a second generation DVD (even though it is really a first generation) and will not make a copy of it. More particularly, as shown in Fig. 4, an original DVD is produced that includes in its ROOT directory (but may also be located in some other location so long as playback is not affected) a copy protection file, such as archive.txt, as well as the other standard files in the VIDEO_TS directory.
  • the software finds the copy protection file in step 104 and therefore handles it as a second generation recordable DVD and will not copy it.
  • the copy protection file (or files if multiple copying programs are to be foiled) is inserted during the disc authoring process and is thereafter incorporated on each original disc through replication.
  • the contents of the file archive.txt do not matter. If in future versions, or in different disc copying products, the contents of the file do become material, the copy protection file impressed on the first generation DVD should satisfy whatever the software's requirement is for indicating that the DVD is a copy.
  • the copy protection file could have other formats as well.
  • the file could be a binary file.
  • this binary file contains only binary zeros.
  • the program DVD X-COPY looks for the copy protection file archive.txt in the root directory.
  • Other software programs may be provided that may look for a different copy protection file, such as CPF2.xxx in the ROOT directory, or CPF3.yyy in the VIDEO_TS directory. Therefore an original DVD can include these files as well, as shown in Fig. 4.
  • As new software is written to copy DVDs if it writes on a copy some indication that the disc is a copy of an original and should not be copied, then that software can be foiled from making even a second generation copy simply by including that indication on an original disc.
  • discs can contain multiple copy protection files on a single disc to foil a wide variety of disc copying software programs which, individually, rely on the presence or absence of different copy protection files in determining whether an archive copy is permitted.
  • My present invention - how to foil my copy protection invention - is to have the burning software check whether the disc is an original or recordable disc. If it is an original disc, then there should be no archive.txt or similar copy protection indication on the disc. Thus the software simply ignores the file, even if it is on an original disc, and copies the disc. Only if the disc is recordable does the presence of the archive.txt or comparable file prevent copying.
  • FIG. 5 is a flow chart that shows how a DVD X-COPY-type burning software can be modified so as to foil my copy protection method.
  • the only difference between this flow chart and the one in Fig. 2 is the new step 101.
  • a check is first performed to determine if it is an original prerecorded DVD. As discussed above, typically this information is included in the ID- FIELD as shown in Fig. 1. If it is, then the DVD proceeds with the copying process shown in steps 106 and 108. If the loaded DVD is not a pre-recorded disc then in step 102 a search is conducted for a copy protection file as in Fig. 2.
  • the present invention can be used to allow the copying of original DVDs that are not entitled to copy protection but contain means of preventing copying anyway.
  • original DVDs may include only data and files that have been released in the public domain by their creator or are in the public domain because any copyrights therein have expired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Storage Device Security (AREA)

Abstract

Dans la présente invention, un graveur de disque reçoit un disque à copier et vérifie s'il s'agit d'un disque original ou d'un disque enregistrable. S'il s'agit d'un disque original, son contenu est copié avec une indication de protection contre la copie. S'il s'agit d'un disque enregistrable, une vérification est réalisée pour déterminer si le disque comprend une indication de protection contre la copie et la copie est réalisée uniquement si l'indication de protection contre la copie le permet.
PCT/US2005/009919 2004-03-26 2005-03-25 Procede permettant de contourner les protections contre la copie des dvd WO2005098832A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US55684904P 2004-03-26 2004-03-26
US60/556,849 2004-03-26

Publications (2)

Publication Number Publication Date
WO2005098832A2 true WO2005098832A2 (fr) 2005-10-20
WO2005098832A3 WO2005098832A3 (fr) 2006-07-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10606536B2 (en) 2018-08-17 2020-03-31 Bank Of America Corporation Intelligent systematic physical document fulfillment system
US11025641B2 (en) 2018-08-21 2021-06-01 Bank Of America Corporation System for optimizing access control for server privilege
US11087323B2 (en) 2018-08-21 2021-08-10 Bank Of America Corporation Exposure based secure access system
US11361330B2 (en) 2018-08-22 2022-06-14 Bank Of America Corporation Pattern analytics system for document presentment and fulfillment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5729516A (en) * 1996-03-12 1998-03-17 Pioneer Electronic Coporation Information recording medium, apparatus for recording the same and apparatus for reproducing the same
US20020015369A1 (en) * 2000-06-01 2002-02-07 Sony Corporation Optical disk apparatus, method of recording on optical disk, and optical disk
US6351439B1 (en) * 1996-10-16 2002-02-26 International Business Machines Corporation Method and system for managing access to data through data transformation
US20020184537A1 (en) * 2000-07-17 2002-12-05 Tatsuya Inokuchi Method and apparatus for recording and/or reproducing data and record medium
US20030012098A1 (en) * 2000-05-18 2003-01-16 Yoichiro Sako Recording medium, recording medium recording method, output control method, reproducing apparatus, recording/reproducing control method, recording method, recording/reproducing method, and recording and/or reproducing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5729516A (en) * 1996-03-12 1998-03-17 Pioneer Electronic Coporation Information recording medium, apparatus for recording the same and apparatus for reproducing the same
US6351439B1 (en) * 1996-10-16 2002-02-26 International Business Machines Corporation Method and system for managing access to data through data transformation
US20030012098A1 (en) * 2000-05-18 2003-01-16 Yoichiro Sako Recording medium, recording medium recording method, output control method, reproducing apparatus, recording/reproducing control method, recording method, recording/reproducing method, and recording and/or reproducing method
US20020015369A1 (en) * 2000-06-01 2002-02-07 Sony Corporation Optical disk apparatus, method of recording on optical disk, and optical disk
US20020184537A1 (en) * 2000-07-17 2002-12-05 Tatsuya Inokuchi Method and apparatus for recording and/or reproducing data and record medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10606536B2 (en) 2018-08-17 2020-03-31 Bank Of America Corporation Intelligent systematic physical document fulfillment system
US11025641B2 (en) 2018-08-21 2021-06-01 Bank Of America Corporation System for optimizing access control for server privilege
US11087323B2 (en) 2018-08-21 2021-08-10 Bank Of America Corporation Exposure based secure access system
US11361330B2 (en) 2018-08-22 2022-06-14 Bank Of America Corporation Pattern analytics system for document presentment and fulfillment

Also Published As

Publication number Publication date
WO2005098832A3 (fr) 2006-07-13

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