CA1305561C - Electronic appliance - Google Patents

Electronic appliance

Info

Publication number
CA1305561C
CA1305561C CA000567748A CA567748A CA1305561C CA 1305561 C CA1305561 C CA 1305561C CA 000567748 A CA000567748 A CA 000567748A CA 567748 A CA567748 A CA 567748A CA 1305561 C CA1305561 C CA 1305561C
Authority
CA
Canada
Prior art keywords
data
secret
key
reset
electronic appliance
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.)
Expired - Lifetime
Application number
CA000567748A
Other languages
English (en)
French (fr)
Inventor
Hisao Kunita
Akitaka Morita
Eichika Matsuda
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Application granted granted Critical
Publication of CA1305561C publication Critical patent/CA1305561C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
    • G06F15/025—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators adapted to a specific application
    • G06F15/0283—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators adapted to a specific application for data storage and retrieval
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2105—Dual mode as a secondary aspect

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Computing Systems (AREA)
  • Software Systems (AREA)
  • Storage Device Security (AREA)
  • Calculators And Similar Devices (AREA)
CA000567748A 1987-05-27 1988-05-26 Electronic appliance Expired - Lifetime CA1305561C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP130612/1987 1987-05-27
JP62130612A JPS63293664A (ja) 1987-05-27 1987-05-27 電子機器

Publications (1)

Publication Number Publication Date
CA1305561C true CA1305561C (en) 1992-07-21

Family

ID=15038381

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000567748A Expired - Lifetime CA1305561C (en) 1987-05-27 1988-05-26 Electronic appliance

Country Status (5)

Country Link
US (1) US4926388A (en:Method)
EP (1) EP0298242B1 (en:Method)
JP (1) JPS63293664A (en:Method)
CA (1) CA1305561C (en:Method)
DE (1) DE3853321T2 (en:Method)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4931997A (en) * 1987-03-16 1990-06-05 Hitachi Ltd. Semiconductor memory having storage buffer to save control data during bulk erase
JP2504137B2 (ja) * 1988-09-27 1996-06-05 日本電気株式会社 メモリ書き込みプロテクト回路
JP2557540B2 (ja) * 1990-02-27 1996-11-27 シャープ株式会社 電子式キャッシュレジスタ
JPH088566B2 (ja) * 1990-08-13 1996-01-29 ヤマハ株式会社 データ転送装置
KR940005696B1 (ko) * 1991-11-25 1994-06-22 현대전자산업 주식회사 보안성 있는 롬(rom)소자
US5533123A (en) * 1994-06-28 1996-07-02 National Semiconductor Corporation Programmable distributed personal security
US5896255A (en) * 1995-10-02 1999-04-20 Aris Mardirossian, Inc. Magnetic disc cartridge and corresponding system/method for limiting coping of software
JPH117420A (ja) * 1997-04-22 1999-01-12 Sharp Corp データ受信装置
KR20020042868A (ko) * 2000-08-16 2002-06-07 요트.게.아. 롤페즈 디지털 저작물의 배포 및 사용을 규제하는 방법 및 장치
FR2872937B1 (fr) * 2004-07-08 2006-10-20 Pascal Lucchina Dispositif personnel programmable securise de stockage et de restitution de donnees
US7506799B2 (en) * 2004-07-30 2009-03-24 Nokia Corporation Method for the monitoring of system security in electronic devices
US8397081B2 (en) * 2005-06-22 2013-03-12 Freescale Semiconductor, Inc. Device and method for securing software
JP5585278B2 (ja) * 2010-08-02 2014-09-10 株式会社リコー 撮像装置及び撮像方法
JP2011141888A (ja) * 2011-03-11 2011-07-21 Renesas Electronics Corp シングルチップマイクロコンピュータ

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005386A (en) * 1974-05-21 1977-01-25 Canon Kabushiki Kaisha Clearing system
JPS5569866A (en) * 1978-11-21 1980-05-26 Canon Inc Electronic apparatus
JPS5894026U (ja) * 1981-12-21 1983-06-25 カシオ計算機株式会社 小型電子式計算機
JPS59104400U (ja) * 1982-12-25 1984-07-13 カシオ計算機株式会社 デ−タ記憶装置
JPS61275948A (ja) * 1985-05-31 1986-12-06 Casio Comput Co Ltd デ−タ記憶装置
ATE65632T1 (de) * 1985-07-08 1991-08-15 Siemens Ag Verfahren zum kontrollieren eines speicherzugriffs auf einer chipkarte und anordnung zur durchfuehrung des verfahrens.

Also Published As

Publication number Publication date
US4926388A (en) 1990-05-15
DE3853321D1 (de) 1995-04-20
EP0298242B1 (en) 1995-03-15
DE3853321T2 (de) 1995-11-09
JPH0564823B2 (en:Method) 1993-09-16
JPS63293664A (ja) 1988-11-30
EP0298242A3 (en) 1991-07-03
EP0298242A2 (en) 1989-01-11

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Legal Events

Date Code Title Description
MKEX Expiry