ATE97245T1 - Verfahren zur stoerung der tastenerkennung einer unkodierten tastatur und schaltung zur ausfuehrung des verfahrens. - Google Patents

Verfahren zur stoerung der tastenerkennung einer unkodierten tastatur und schaltung zur ausfuehrung des verfahrens.

Info

Publication number
ATE97245T1
ATE97245T1 AT89403570T AT89403570T ATE97245T1 AT E97245 T1 ATE97245 T1 AT E97245T1 AT 89403570 T AT89403570 T AT 89403570T AT 89403570 T AT89403570 T AT 89403570T AT E97245 T1 ATE97245 T1 AT E97245T1
Authority
AT
Austria
Prior art keywords
keyboard
circuit
carrying
outputs
uncoded
Prior art date
Application number
AT89403570T
Other languages
English (en)
Inventor
Hartmut Fink
Philippe Verrier
Roger Poulenard
Original Assignee
Bull Sa
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 Bull Sa filed Critical Bull Sa
Application granted granted Critical
Publication of ATE97245T1 publication Critical patent/ATE97245T1/de

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/20—Dynamic coding, i.e. by key scanning
    • 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
    • G06F21/82—Protecting input, output or interconnection devices
    • G06F21/83—Protecting input, output or interconnection devices input devices, e.g. keyboards, mice or controllers thereof
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Human Computer Interaction (AREA)
  • Computer Security & Cryptography (AREA)
  • Software Systems (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Storage Device Security (AREA)
  • Communication Control (AREA)
AT89403570T 1988-12-20 1989-12-20 Verfahren zur stoerung der tastenerkennung einer unkodierten tastatur und schaltung zur ausfuehrung des verfahrens. ATE97245T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8816786A FR2641656B1 (fr) 1988-12-20 1988-12-20 Procede de brouillage de l'identification d'une touche d'un clavier non code, et circuit pour la mise en oeuvre du procede
EP89403570A EP0375546B1 (de) 1988-12-20 1989-12-20 Verfahren zur Störung der Tastenerkennung einer unkodierten Tastatur und Schaltung zur Ausführung des Verfahrens

Publications (1)

Publication Number Publication Date
ATE97245T1 true ATE97245T1 (de) 1993-11-15

Family

ID=9373142

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89403570T ATE97245T1 (de) 1988-12-20 1989-12-20 Verfahren zur stoerung der tastenerkennung einer unkodierten tastatur und schaltung zur ausfuehrung des verfahrens.

Country Status (7)

Country Link
EP (1) EP0375546B1 (de)
AT (1) ATE97245T1 (de)
DE (1) DE68910657T2 (de)
ES (1) ES2048311T3 (de)
FR (1) FR2641656B1 (de)
HK (1) HK80697A (de)
NO (1) NO177073C (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930005841B1 (ko) * 1990-10-27 1993-06-25 삼성전자 주식회사 마이크로_콤퓨터시스템의 키스캔회로 및 그 방법
FR2692378B1 (fr) * 1992-06-12 1994-07-29 Dassault Automatismes Telecomm Unite a clavier de securite perfectionnee.
GB9224524D0 (en) * 1992-11-24 1993-01-13 Vecta Ltd A security system and a method
US5832206A (en) * 1996-03-25 1998-11-03 Schlumberger Technologies, Inc. Apparatus and method to provide security for a keypad processor of a transaction terminal
GB2333883B (en) * 1998-01-28 2002-10-16 Markus Guenther Kuhn Low cost countermeasure against compromising electromagnetic computer emanations
CN105353889B (zh) * 2015-11-29 2018-07-06 恒宝股份有限公司 一种随机扫描键盘及其扫描方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004614A1 (en) * 1983-05-13 1984-11-22 Ira Dennis Gale Data security device
NL8401989A (nl) * 1984-06-22 1986-01-16 Nederlanden Staat Video-eindstation met beeldlijnverhaspeling.
SE448803B (sv) * 1986-05-22 1987-03-16 Ljungmans Ind Ab Sett att forhindra obehorig atkomst av information

Also Published As

Publication number Publication date
EP0375546B1 (de) 1993-11-10
HK80697A (en) 1997-06-20
DE68910657T2 (de) 1994-02-24
NO177073B (no) 1995-04-03
NO177073C (no) 1995-07-12
FR2641656A1 (fr) 1990-07-13
EP0375546A1 (de) 1990-06-27
NO895116L (no) 1990-06-21
FR2641656B1 (fr) 1991-08-02
DE68910657D1 (de) 1993-12-16
NO895116D0 (no) 1989-12-19
ES2048311T3 (es) 1994-03-16

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
EEIH Change in the person of patent owner
EELA Cancelled due to lapse of time