CA2245232A1 - Optical disc copy management system - Google Patents

Optical disc copy management system

Info

Publication number
CA2245232A1
CA2245232A1 CA002245232A CA2245232A CA2245232A1 CA 2245232 A1 CA2245232 A1 CA 2245232A1 CA 002245232 A CA002245232 A CA 002245232A CA 2245232 A CA2245232 A CA 2245232A CA 2245232 A1 CA2245232 A1 CA 2245232A1
Authority
CA
Canada
Prior art keywords
optical record
record carrier
key
copy
data
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.)
Granted
Application number
CA002245232A
Other languages
French (fr)
Other versions
CA2245232C (en
Inventor
Reinhard Blaukovitsch
Andreas Winter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony DADC Europe Limited Austria Branch
Original Assignee
Sony DADC Austria AG
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 Sony DADC Austria AG filed Critical Sony DADC Austria AG
Publication of CA2245232A1 publication Critical patent/CA2245232A1/en
Application granted granted Critical
Publication of CA2245232C publication Critical patent/CA2245232C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G11B20/0021—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
    • G11B20/00253—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 stored on the record carrier
    • G11B20/00391—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 stored on the record carrier the key being stored in subcodes, e.g. in the Q subcode of a CD
    • 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
    • G11B20/00615—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 logical format of the recording medium, e.g. the structure of sectors, blocks, or frames
    • G11B20/0063—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 logical format of the recording medium, e.g. the structure of sectors, blocks, or frames wherein the modification to the logical format mainly concerns management data, e.g., by changing the format of the TOC or the subcode
    • 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
    • G11B20/0071—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a purchase action
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
    • G06F2211/007—Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress

Abstract

The invention relates to a method of obtaining a copy protected optical record carrier carrying information in different blocks, a method of accessing such a copy protected optical record carrier and such an optical record carrier itself. Access means for optical record carriers return different results when retrieving blocks, which contain incorrect address data in the corresponding subcode fields. A copy protection key will be implemented during manufacture of an optical record carrier by modifying the subcode address information of a predetermined pattern of blocks. It is normally not possible to copy incorrect address data onto an optical record carrier, since the address data will be newly generated during the copy process. Therefore, such a key can be utilized to distinguish between an original disc and a copied or non original disc. The key is preset before manufacturing of the optical record carrier itself and can therefore be used to encrypt the data stored on the optical record carrier. Upon accessing of the data, first the key is extracted from the optical record carrier and then the data can be decrypted utilizing this key.
CA002245232A 1997-08-28 1998-08-06 Optical disc copy management system Expired - Fee Related CA2245232C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP97114927.3 1997-08-28
EP97114927A EP0899733B1 (en) 1997-08-28 1997-08-28 Optical disc copy management system

Publications (2)

Publication Number Publication Date
CA2245232A1 true CA2245232A1 (en) 1999-02-28
CA2245232C CA2245232C (en) 2007-01-23

Family

ID=8227283

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002245232A Expired - Fee Related CA2245232C (en) 1997-08-28 1998-08-06 Optical disc copy management system

Country Status (14)

Country Link
US (1) US6535858B1 (en)
EP (1) EP0899733B1 (en)
JP (1) JPH11250512A (en)
KR (1) KR100583906B1 (en)
CN (1) CN1132175C (en)
AT (1) ATE199990T1 (en)
AU (1) AU750499B2 (en)
BR (1) BR9806518B1 (en)
CA (1) CA2245232C (en)
DE (1) DE69704352T2 (en)
ES (1) ES2155230T3 (en)
RU (1) RU2229172C2 (en)
SG (1) SG71803A1 (en)
TW (1) TW374900B (en)

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Also Published As

Publication number Publication date
DE69704352T2 (en) 2001-07-12
AU8194998A (en) 1999-03-11
BR9806518B1 (en) 2011-01-11
KR100583906B1 (en) 2006-09-06
AU750499B2 (en) 2002-07-18
ES2155230T3 (en) 2001-05-01
BR9806518A (en) 2001-03-13
EP0899733B1 (en) 2001-03-21
DE69704352D1 (en) 2001-04-26
CA2245232C (en) 2007-01-23
EP0899733A1 (en) 1999-03-03
ATE199990T1 (en) 2001-04-15
CN1132175C (en) 2003-12-24
TW374900B (en) 1999-11-21
US6535858B1 (en) 2003-03-18
CN1219728A (en) 1999-06-16
JPH11250512A (en) 1999-09-17
KR19990023961A (en) 1999-03-25
RU2229172C2 (en) 2004-05-20
SG71803A1 (en) 2000-04-18

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Effective date: 20140806