KR100530172B1 - Encryption method using of optical disk recording and reproducing method and apparatus - Google Patents
Encryption method using of optical disk recording and reproducing method and apparatus Download PDFInfo
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- KR100530172B1 KR100530172B1 KR10-1999-0010954A KR19990010954A KR100530172B1 KR 100530172 B1 KR100530172 B1 KR 100530172B1 KR 19990010954 A KR19990010954 A KR 19990010954A KR 100530172 B1 KR100530172 B1 KR 100530172B1
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- 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
- G11B20/00369—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 wherein a first key, which is usually stored on a hidden channel, e.g. in the lead-in of a BD-R, unlocks a key locker containing a second
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- 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
- G11B20/00297—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 a management area, e.g. the video manager [VMG] of a DVD
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
Abstract
본 발명은 와 같은 광디스크 미디어에 암호화 방식을 이용해서 재생지역정보인 지역코드를 기록, 활용함으로써 보다 원활한 지역제어 및 복제방지 효과를 갖는 암호화 방식을 이용한 광디스크 지역별 기록재생방법 및 장치에 관한 것이다. 본 발명은 광디스크에서 사용되고 있는 특정 지역에서만의 재생을 가능하게 하는 지역정보를 암호화방식을 도입해서 보다 강화하여 정해진 지역을 벗어한 지역에서의 재생을 방지하고, 이에 의해 지역간의 불법 복제된 디스크의 재생 및 유통을 막을 수 있는 효과가 있다. The present invention relates to an optical disc region recording and reproducing method and apparatus using an encryption scheme having a more smooth area control and copy protection effect by recording and utilizing a region code as a reproduction region information on an optical disc media using an encryption scheme. The present invention is further strengthened by adopting an encryption method for local information enabling playback only in a specific area used in an optical disc, thereby preventing playback in an area outside a predetermined area, thereby reproducing illegally copied discs between areas. And there is an effect that can prevent the distribution.
Description
본 발명은 DVD와 같은 광디스크 미디어에 암호화 방식을 이용해서 재생지역정보인 지역코드를 기록, 활용함으로써 보다 원활한 지역제어 및 복제방지 효과를 갖는 암호화 방식을 이용한 광디스크 지역별 기록재생방법 및 장치에 관한 것이다.The present invention relates to an optical disc region recording and reproducing method and apparatus using an encryption method having a more smooth area control and copy protection effect by recording and utilizing a region code as a reproduction region information on an optical disc media such as a DVD.
현재 디지탈다기능디스크(DVD; Digital Versatile Disk)는 세계를 8개의 지역으로 분류해서 해당되는 지역코드를 디스크의 특정위치에 기록하고 있다. 이 특정위치는 리드-인(Lead-in) 영역의 섹터데이타내의 1∼2064바이트중 12번째 바이트이다. 그리고, 세트내에서 이를 이용해서 디스크의 재생을 제어한다. Digital Versatile Disks (DVDs) currently classify the world into eight regions and record the corresponding region codes at specific locations on the disk. This specific position is the 12th byte of 1 to 2064 bytes in the sector data of the lead-in area. This is then used within the set to control the playback of the disc.
도 1은 DVD의 섹터구조를 보여주는 도면이다. DVD의 섹터구조는 2048바이트(byte)의 메인(main)데이타를 포함한다. 각 메인데이타에는 4바이트의 식별데이타(ID) 및 이 식별데이타(ID)를 위한 2바이트의 ID에러검출코드(IED; ID Error Detection code)를 포함하며, 6바이트의 저작권관리정보(CPR_MAI; Copyright Management Information)를 포함한다. 그리고, ID, IED, CPR_MAI 및 메인데이타 모두를 위한 4바이트의 에러검출코드(EDC; Error Detection Code)를 포함한다. 1 is a diagram showing a sector structure of a DVD. The sector structure of a DVD contains 2048 bytes of main data. Each main data includes four bytes of identification data (ID) and two bytes of ID error detection code (IED) for this identification data, and six bytes of copyright management information (CPR_MAI; Copyright). Management Information). In addition, a four-byte error detection code (EDC) for ID, IED, CPR_MAI, and main data is included.
도 2a-b는 리드-인 영역(Lead-in Area)과 데이타 영역(data area)내의 저작권관리정보(CPR_MAI)의 구조를 보여주는 도면이다. 이 리드-인 영역내의 CPR-MAI의 지역관리정보(RMA; Regional management Information)를 이용하여 해당 지역에서의 재생가능여부를 기록한다. 2A-B are diagrams showing the structure of copyright management information CPR_MAI in a lead-in area and a data area. The regional management information (RMA) of the CPR-MAI in this lead-in area is used to record whether or not the area is reproducible.
도 3 및 도 4는 종래의 광디스크기록재생시스템에 적용된 암호화 기록 및 재생방식을 설명하기 위한 도면이다. 3 and 4 are diagrams for explaining the encryption recording and reproducing method applied to the conventional optical disc recording and reproducing system.
도 3에 보여진 바와같이, 기록시에 메인데이타를 암호키에 의해 암호화(encryption)한다(단계 301). 그리고, 암호화된 메인데이타 및 암호키를 광디스크의 해당 영역에 기록한다(단계 302). As shown in Fig. 3, the main data is encrypted with an encryption key at the time of recording (step 301). The encrypted main data and encryption key are recorded in the corresponding area of the optical disc (step 302).
도 4에 보여진 바와같이, 재생시에는 DVD세트에 설정된 암호키와 디스크에 기록된 암호키를 복호화(decryption)한다(단계 401). 단계 401에서 복호화된 암호키를 이용하여 암호화된 메인데이타를 복호화한다(단계 402). 복호화되기 전의 메인데이타를 추출한다(단계 403). As shown in Fig. 4, during reproduction, the encryption key set on the DVD set and the encryption key recorded on the disc are decrypted (step 401). The encrypted main data is decrypted using the encryption key decrypted in step 401 (step 402). The main data before decoding are extracted (step 403).
이와같이 기존의 DVD세트(DVD 플레이어, DVD-ROM 드라이버, DVD디코더 카드 등)는 DVD디스크가 삽입되면 해당되는 영역에 기록되어 있는 지역코드를 읽어서 세트에 지정된 지역코드와 동일한지 검사한다. 여기서, 해당 영역은 리드-인 영역내의 콘텐트 공급 정보(Content Provider Information)의 모든 섹터내의 CPR_MAI의 LSB를 말한다. 만약 디스크가 특정한 지역에서만 재생되도록 설정되어 있어서, 세트의 지역코드가 동일하지 않으면 재생을 중단하고 이에 해당하는 메세지를 사용자에게 표시한다. In this way, the existing DVD set (DVD player, DVD-ROM driver, DVD decoder card, etc.) reads the region code recorded in the corresponding area when the DVD disc is inserted and checks whether it is identical to the region code specified in the set. Here, the corresponding area refers to the LSB of the CPR_MAI in all sectors of the content provider information in the lead-in area. If the disc is set to be played only in a specific region, if the region code of the set is not the same, the play is interrupted and a corresponding message is displayed to the user.
그러나, 이와같은 기존의 방법은 다른 지역코드를 가진 디스크가 DVD세트에 삽입되면, 기설정된 지역코드를 가진 세트에서는 지역코드의 동일성을 검사하는 단계만을 수행되지 않게 하므로써 재생불가능한 디스크에 대해서도 간단하게 재생할 수 있는 문제점이 있었다. 실제로 이러한 것은 마이크로프로세서나 프로그램의 조작만으로 구현될 수 있으며, 제품내부의 보드상의 조작을 통해서 구현될 수도 있다. 또한, 기존의 방식은 RF카피 또는 비트-바이-비트 카피(bit-by-bit)라고 불리는 불법복제 기술로 복제가 가능하며, 이러한 복제본에 대한 구별 및 재생제어가 불가능하였다. However, such a conventional method is that when a disc having a different region code is inserted into a DVD set, the set having a predetermined region code can be simply played even on a non-playable disc by not performing the step of checking the identity of the region code. There was a problem that could be. In practice, this may be implemented only by the operation of a microprocessor or a program, or may be implemented through manipulation on a board inside the product. In addition, the existing method can be copied by an illegal copy technique called RF copy or bit-by-bit copy, and it is impossible to distinguish and reproduce the copy.
따라서, 본 발명의 목적은 광디스크에서 사용되고 있는 특정 지역에서만의 재생을 가능하게 하는 지역정보를 이용한 암호화방식을 도입해서 보다 강화하여 지정된 지역을 벗어난 지역에서의 재생을 방지하고 이에 의해 지역간의 불법 복제된 디스크의 재생 및 유통을 막을 수 있는 암호화방식을 이용한 광디스크 지역별 재생정보 및 장치를 제공함에 있다.Accordingly, an object of the present invention is to further strengthen by introducing an encryption method using local information that enables playback only in a specific area that is used in the optical disk to prevent playback in areas outside the designated area, thereby preventing illegal copying between areas. An object of the present invention is to provide playback information and a device for each optical disk using an encryption method that can prevent playback and distribution of a disk.
위와같은 목적을 달성하기 위한 본 발명의 특징은 지역에 따라 재생을 제어할 필요가 있는 광디스크 시스템에 있어서, (1) 메인데이타를 제 1암호키를 이용하여 암호화하고, 이 제 1암호키를 특정 영역정보를 포함한 제 2암호키를 추가하여 시스템키를 생성하는 단계, (2) 상기 시스템키와 상기 메인데이타를 광디스크의 해당 영역에 기록하는 단계를 포함하는 암호화방식을 이용한 광디스크 지역별 기록재생방법에 있다.A feature of the present invention for achieving the above object is that in an optical disc system that needs to control playback in accordance with a region, (1) the main data is encrypted using a first encryption key, and the first encryption key is specified. Generating a system key by adding a second encryption key including area information; and (2) recording the system key and the main data in a corresponding area of the optical disc. have.
이하, 첨부된 도면을 참조하여 본 발명의 바람직한 일 실시예를 상세히 설명하겠다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명은 디스크의 내용과는 별도로 단순하게 저장되어 있던 지역코드를 디스크의 내용을 불법적인 복제로부터 보호하기 위해 사용되는 암호화방식에서 사용하는 키의 일부분으로, 또는 그 키를 암호화하는 부가정보로 사용하므로써 지역코더의 비교 및 검출이 반드시 제대로 이루어진 이후에야 디스크의 내용을 재생할 수 있도록 한다. 이를 위해서 새로운 암호화 방식의 고려가 이루어져야 하며, 또는 기존의 암호화방식의 변경이 이루어져야 한다. The present invention uses a region code that is simply stored separately from the contents of the disk as part of a key used in an encryption method used to protect the contents of the disk from illegal duplication, or as additional information for encrypting the key. This ensures that the content of the disc can be played only after the local coder comparison and detection is done correctly. To this end, consideration should be given to new encryption schemes, or changes to existing encryption schemes.
도 5 및 도 6은 본 발명의 바람직한 실시예에 따른 암호화방식을 이용한 광디스크 지역별 기록 및 재생방법을 설명하기 위한 도면이다. 5 and 6 are diagrams for explaining a recording and reproducing method for each optical disc using an encryption method according to a preferred embodiment of the present invention.
도 5에 보여진 바와같이, 기록시 제 1암호키(A)를 이용하여 메인데이타를 암호화한다(단계 501). 이 제 1암호키(A)를 특정 지역정보를 포함한 제 2암호키(B)를 추가하여(단계 502) 시스템키(E)를 생성한다(단계 503). 암호화된 메인데이타와 시스템키(E)를 디스크의 해당 영역에 기록한다(단계 504). As shown in Fig. 5, during recording, the main data is encrypted using the first encryption key A (step 501). The first encryption key A is added to the second encryption key B including specific area information (step 502) to generate a system key E (step 503). The encrypted main data and the system key E are recorded in the corresponding area of the disk (step 504).
도 6에 보여진 바와같이, 재생시에 암호화된 메인데이타와 시스템키가 기록된 디스크가 DVD세트에 장착되면, 이 DVD세트에 지정된 지역코드를 이용하여 시스템키(E)를 복호화한다(단계 601). 그리고, 복호화된 시스템키(E)를 이용하여 메인데이타를 복호화하기 위한 제 1암호키(A)를 복호화한다(단계 602). 복호화된 제 1암호키(A)를 이용하여 암호화된 메인데이타를 복호화하여(단계 603), 메인데이타를 추출한다(단계 604).As shown in Fig. 6, when the disc on which the encrypted main data and the system key are recorded is mounted on the DVD set, the system key E is decrypted using the area code specified in the DVD set (step 601). Then, the first encryption key A for decrypting the main data is decrypted using the decrypted system key E (step 602). The encrypted main data is decrypted using the decrypted first encryption key A (step 603), and main data is extracted (step 604).
도 7은 본 발명이 적용되는 광디스크기록재생장치를 간략하게 보여주는 도면이다. 도 7에 보여진 장치가 암호화된 정보를 담고 있는 광디스크(701)를 재생하는 경우, 기록/판독기(702)는 데크(미도시)에 로드된 광디스크(701)에 기록된 암호키를 읽어내며, 데이터기록영역에 기록된 암호화된 정보를 읽어낸다. 암호화된 정보 및 암호키는 암호/복호기(703)로 공급된다. 암호/복호기(703)는 읽어낸 암호키 및 메모리(704)에 저장된 암호화시스템을 이용하여 암호화된 정보를 복호한다. 복호된 정보는 뒷단의 신호처리기(미도시)로 공급된다. 7 is a diagram briefly showing an optical disc recording and reproducing apparatus to which the present invention is applied. When the device shown in Fig. 7 plays back the optical disc 701 containing the encrypted information, the recorder / 702 reads the encryption key recorded on the optical disc 701 loaded in the deck (not shown), and the data is read. Read the encrypted information recorded in the recording area. The encrypted information and encryption key are supplied to the encryption / decryptor 703. The encryption / decryptor 703 decrypts the encrypted information using the read encryption key and the encryption system stored in the memory 704. The decoded information is supplied to a signal processor (not shown) at the rear end.
전술한 내용은 본 발명의 하나의 실시예이며, 이러한 실시예가 본원발명을 전제하지는 않는다. 본 발명은 기존의 시스템과의 호환성 및 효율적인 디스크의 관리를 위해 지역코드를 암호화방식에서 사용하는 키의 형태나 지역정보를 추가해서 사용할 수 있다. 이러한 방식에서는 다양한 지역수만큼 암호키가 필요할수도 있고, 여러가지의 키에 동일하게 수행되는 새로운 암호화방식을 도입할 수도 있다. 이를 위해서는, 기존의 키를 지역코드로 암호화하거나 기존의 키의 구조를 확장해서 지역정보를 가지는 지역키로 변경하여 사용할 수 있다. 이때, 시스템은 단일 지역에 대한 키만을 가지며, 이 키로는 단일 지역에서 재생이 허가된 디스크만을 원활하게 재생할 수 있게 된다. 또한, 기존에 사용되고 있는 복제방지용 암호시스템과의 병합도 가능하다. 이때에는 각 지역에 해당하는 지역디스크를 디스크에 저장해 놓고 시스템은 자신의 지역에 해당되는 지역 디스크 키를 읽어와서 디스크 키를 얻게 된다. 이후에는 기존의 암호화방식과 동일하게 동작한다.The foregoing is one embodiment of the invention, which does not presuppose the invention. The present invention can be used in addition to the form of the key or region information using the region code in the encryption method for compatibility with the existing system and efficient disk management. This approach may require as many encryption keys as there are various regions, or introduce new encryption schemes that perform the same on different keys. To this end, the existing key may be encrypted with a region code or the existing key may be expanded and used as a region key having region information. At this time, the system has only a key for a single region, and with this key it is possible to smoothly play only discs that are permitted to be reproduced in a single region. It is also possible to merge with the existing copy protection encryption system. At this time, the local disk for each region is saved on the disk, and the system reads the local disk key for its region and obtains the disk key. After that, the same operation as the existing encryption method.
상술한 바와같이, 본 발명은 광디스크에서 사용되고 있는 특정 지역에서만의 재생을 가능하게 하는 지역정보를 이용한 암호화방식을 도입해서 보다 강화하여 정해진 지역을 벗어한 지역에서의 재생을 방지하고, 이에 의해 지역간의 불법 복제된 디스크의 재생 및 유통을 막을 수 있는 효과가 있다. As described above, the present invention introduces an encryption method using local information that enables playback only in a specific area used in an optical disk, thereby further strengthening it to prevent playback in an area outside a predetermined area, thereby There is an effect that can prevent the reproduction and distribution of illegally copied disk.
도 1은 DVD의 섹터구조를 보여주는 도면,1 shows a sector structure of a DVD;
도 2a-b는 리드-인 영역(Lead-in Area)과 데이타 영역(data area)내의 저작권관리정보(CPR_MAI)의 구조를 보여주는 도면,2A-B are views showing the structure of copyright management information CPR_MAI in a lead-in area and a data area;
도 3 및 도 4는 종래의 광디스크기록재생시스템에 적용된 암호화 기록 및 재생방식을 설명하기 위한 도면,3 and 4 are diagrams for explaining an encryption recording and reproducing method applied to a conventional optical disc recording and reproducing system;
도 5 및 도 6은 본 발명의 바람직한 실시예에 따른 암호화방식을 이용한 광디스크 지역별 기록 및 재생방법을 설명하기 위한 도면,5 and 6 are views for explaining a recording and reproducing method for each optical disc using an encryption method according to a preferred embodiment of the present invention;
도 7은 본 발명이 적용되는 광디스크기록재생장치를 간략하게 보여주는 도면.Fig. 7 is a diagram showing briefly an optical disc recording and reproducing apparatus to which the present invention is applied.
< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>
701 : 광디스크 702 : 기록/판독기701: optical disc 702: recorder / reader
703 : 암호/복호기 704 : 메모리703: password / decoder 704: memory
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| KR20030003998A (en) * | 2001-07-04 | 2003-01-14 | 장용 | CD,DVD's Illegal Copy or Install Protection System |
| KR100524952B1 (en) | 2003-03-07 | 2005-11-01 | 삼성전자주식회사 | Method for protecting data of recordable medium and disk drive using the same |
| US7203967B2 (en) | 2003-09-10 | 2007-04-10 | Qualcomm Incorporated | Methods and apparatus for content protection in a wireless network |
| KR20060102036A (en) * | 2005-03-22 | 2006-09-27 | 사파미디어 주식회사 | Security optical disc, writing method for security optical disc and writing/reading device for security optical disc |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH103746A (en) * | 1996-06-12 | 1998-01-06 | Mitsubishi Electric Corp | Copywrite protection system |
| JPH10210436A (en) * | 1997-01-23 | 1998-08-07 | Sony Corp | Information signal output control method, information signal copy prevention method, information signal copy prevention device and information signal recording medium |
| KR19980064832A (en) * | 1996-12-26 | 1998-10-07 | 니시무로타이조 | A recording medium for recording data, a reproducing apparatus for reproducing the data recorded on the recording medium, and a data reproducing system for reproducing the data recorded on the recording medium via a network or the like. |
| KR19980068352A (en) * | 1997-02-18 | 1998-10-15 | 구자홍 | How to protect your DVD copy |
| KR19980074137A (en) * | 1997-03-21 | 1998-11-05 | 윤종용 | Device for preventing illegal copying of disk composite image data and its method |
| KR19980081634A (en) * | 1997-04-23 | 1998-11-25 | 이데이노부유키 | Encryption apparatus and method, Decoding apparatus and method, Information processing apparatus and method |
| US6526010B1 (en) * | 1999-10-13 | 2003-02-25 | Matsushita Electric Industrial Co., Ltd. | Recording medium, method and apparatus for recording/reproducing information which has been scrambled using a medium identifier and a sector number |
-
1999
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH103746A (en) * | 1996-06-12 | 1998-01-06 | Mitsubishi Electric Corp | Copywrite protection system |
| KR19980064832A (en) * | 1996-12-26 | 1998-10-07 | 니시무로타이조 | A recording medium for recording data, a reproducing apparatus for reproducing the data recorded on the recording medium, and a data reproducing system for reproducing the data recorded on the recording medium via a network or the like. |
| JPH10210436A (en) * | 1997-01-23 | 1998-08-07 | Sony Corp | Information signal output control method, information signal copy prevention method, information signal copy prevention device and information signal recording medium |
| KR19980068352A (en) * | 1997-02-18 | 1998-10-15 | 구자홍 | How to protect your DVD copy |
| KR19980074137A (en) * | 1997-03-21 | 1998-11-05 | 윤종용 | Device for preventing illegal copying of disk composite image data and its method |
| KR19980081634A (en) * | 1997-04-23 | 1998-11-25 | 이데이노부유키 | Encryption apparatus and method, Decoding apparatus and method, Information processing apparatus and method |
| US6526010B1 (en) * | 1999-10-13 | 2003-02-25 | Matsushita Electric Industrial Co., Ltd. | Recording medium, method and apparatus for recording/reproducing information which has been scrambled using a medium identifier and a sector number |
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