KR910004627B1 - 자기기록매체의 복제방지방법 - Google Patents

자기기록매체의 복제방지방법 Download PDF

Info

Publication number
KR910004627B1
KR910004627B1 KR1019860006108A KR860006108A KR910004627B1 KR 910004627 B1 KR910004627 B1 KR 910004627B1 KR 1019860006108 A KR1019860006108 A KR 1019860006108A KR 860006108 A KR860006108 A KR 860006108A KR 910004627 B1 KR910004627 B1 KR 910004627B1
Authority
KR
South Korea
Prior art keywords
data
recording medium
magnetic recording
shifting
read
Prior art date
Application number
KR1019860006108A
Other languages
English (en)
Korean (ko)
Other versions
KR870001528A (ko
Inventor
요시오 미까메
후미또모 우에노
Original Assignee
티디케이 가부시끼가이샤
오또시 유다까
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 티디케이 가부시끼가이샤, 오또시 유다까 filed Critical 티디케이 가부시끼가이샤
Publication of KR870001528A publication Critical patent/KR870001528A/ko
Application granted granted Critical
Publication of KR910004627B1 publication Critical patent/KR910004627B1/ko

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/14—Protection against unauthorised use of memory or access to memory
    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Software Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
KR1019860006108A 1985-07-27 1986-07-26 자기기록매체의 복제방지방법 KR910004627B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP60166147A JPH0673221B2 (ja) 1985-07-27 1985-07-27 磁気記録媒体の複製防止方法
JP60-166147 1985-07-27
JP166147 1985-07-27

Publications (2)

Publication Number Publication Date
KR870001528A KR870001528A (ko) 1987-03-14
KR910004627B1 true KR910004627B1 (ko) 1991-07-08

Family

ID=15825923

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019860006108A KR910004627B1 (ko) 1985-07-27 1986-07-26 자기기록매체의 복제방지방법

Country Status (4)

Country Link
JP (1) JPH0673221B2 (de)
KR (1) KR910004627B1 (de)
DE (1) DE3625176A1 (de)
GB (1) GB2178574A (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6948491A (en) * 1990-01-20 1991-07-25 Consolidated Technology Limited Copy protection for memory devices
CN1280815C (zh) * 1994-04-18 2006-10-18 松下电器产业株式会社 信息处理装置
JP3004850U (ja) * 1994-05-19 1994-11-29 有限会社カートップトミタ 車輌在庫情報システム
US9135948B2 (en) * 2009-07-03 2015-09-15 Microsoft Technology Licensing, Llc Optical medium with added descriptor to reduce counterfeiting

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5960464A (ja) * 1982-09-30 1984-04-06 株式会社東芝 プログラムの暗号化方式
IL68989A (en) * 1983-06-15 1985-03-31 Amiran Grynberg Diskette protection
GB2162992B (en) * 1984-08-09 1988-10-12 Edward Peter Campbell Sington A method of recording a computer program
US4823210A (en) * 1984-08-13 1989-04-18 Verbatim Corporation Copy protected disk
US4644493A (en) * 1984-09-14 1987-02-17 International Business Machines Corporation Implementing a shared higher level of privilege on personal computers for copy protection of software
JPH0616345B2 (ja) * 1984-12-19 1994-03-02 ティーディーケイ株式会社 磁気記録媒体の複製品判別方法およびその装置ならびに複製品読み取り防止方法

Also Published As

Publication number Publication date
GB8617502D0 (en) 1986-08-28
JPS6226671A (ja) 1987-02-04
DE3625176A1 (de) 1987-01-29
JPH0673221B2 (ja) 1994-09-14
KR870001528A (ko) 1987-03-14
GB2178574A (en) 1987-02-11

Similar Documents

Publication Publication Date Title
JPH0219549B2 (de)
JPH04232665A (ja) データ記憶装置
KR910004627B1 (ko) 자기기록매체의 복제방지방법
KR0138119B1 (ko) 디지털 신호 재생장치
US3562726A (en) Dual track encoder and decoder
CA1322404C (en) Magnetic disk write precompensation
JPH03222158A (ja) データの追加書込み方法
JP2589673B2 (ja) アドレスデータ検出装置
US4774602A (en) Method for distinguishing original of a magnetically recorded medium from its duplicates
JPH03203005A (ja) フロツピーデイスクドライブ装置におけるライトデータの書き込み補正方式とその装置
JP2630932B2 (ja) 円盤状記録媒体のプログラム記録方法
JP2560047Y2 (ja) 磁気テープ記録再生装置の異常ブロック弁別機構
JPH01106370A (ja) エラー検査装置
JPS5818684B2 (ja) 磁気テ−プ制御装置の誤書込み防止方式
JPS62146476A (ja) デ−タ複写方法
JPS63251839A (ja) 情報記録装置
JPS601675A (ja) 誤り検出回路
JPS62219265A (ja) フロツピ−デイスクの複写防止方法
JPS6280870A (ja) 磁気記録方式
Gibson SpinRite
JPS60186951A (ja) メモリチエツク方式
JPH087949B2 (ja) 書込回路
JPH0580751B2 (de)
JPS6251008A (ja) デ−タ書込み回路
JPS63127468A (ja) デ−タ記憶方式

Legal Events

Date Code Title Description
A201 Request for examination
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 19950614

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee