DE68910657T2 - Verfahren zur Störung der Tastenerkennung einer unkodierten Tastatur und Schaltung zur Ausführung des Verfahrens. - Google Patents

Verfahren zur Störung der Tastenerkennung einer unkodierten Tastatur und Schaltung zur Ausführung des Verfahrens.

Info

Publication number
DE68910657T2
DE68910657T2 DE89403570T DE68910657T DE68910657T2 DE 68910657 T2 DE68910657 T2 DE 68910657T2 DE 89403570 T DE89403570 T DE 89403570T DE 68910657 T DE68910657 T DE 68910657T DE 68910657 T2 DE68910657 T2 DE 68910657T2
Authority
DE
Germany
Prior art keywords
keyboard
circuit
outputs
uncoded
disrupting
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
DE89403570T
Other languages
English (en)
Other versions
DE68910657D1 (de
Inventor
Hartmut Fink
Philippe Verrier
Roger Poulenard
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.)
CP8 Technologies SA
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
Publication of DE68910657D1 publication Critical patent/DE68910657D1/de
Application granted granted Critical
Publication of DE68910657T2 publication Critical patent/DE68910657T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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; CALCULATING OR 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; CALCULATING OR 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)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Software Systems (AREA)
  • Human Computer Interaction (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Communication Control (AREA)
  • Storage Device Security (AREA)
DE89403570T 1988-12-20 1989-12-20 Verfahren zur Störung der Tastenerkennung einer unkodierten Tastatur und Schaltung zur Ausführung des Verfahrens. Expired - Lifetime DE68910657T2 (de)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
DE68910657D1 DE68910657D1 (de) 1993-12-16
DE68910657T2 true DE68910657T2 (de) 1994-02-24

Family

ID=9373142

Family Applications (1)

Application Number Title Priority Date Filing Date
DE89403570T Expired - Lifetime DE68910657T2 (de) 1988-12-20 1989-12-20 Verfahren zur Störung der Tastenerkennung einer unkodierten Tastatur und Schaltung zur Ausführung 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
FR2641656A1 (fr) 1990-07-13
DE68910657D1 (de) 1993-12-16
FR2641656B1 (fr) 1991-08-02
NO177073B (no) 1995-04-03
EP0375546B1 (de) 1993-11-10
ATE97245T1 (de) 1993-11-15
HK80697A (en) 1997-06-20
NO895116L (no) 1990-06-21
NO177073C (no) 1995-07-12
EP0375546A1 (de) 1990-06-27
NO895116D0 (no) 1989-12-19
ES2048311T3 (es) 1994-03-16

Similar Documents

Publication Publication Date Title
DE69423390D1 (de) Verfahren zur Eingabe einer vertraulichen Information und entsprechendes Endgerät
DE60223296D1 (de) Verfahren zur Erzeugung von Passwörtern aus biometrischen Daten
ATE111663T1 (de) System und verfahren zur bilderkennung.
ATE68277T1 (de) Verfahren zur sicherung von einfachen koden.
DE3676736D1 (de) Verfahren und einrichtung zur zusammensetzung einer vielzahl von videobildern in drei dimensionen.
DE3852678T2 (de) Mustererkennung.
DE68910657T2 (de) Verfahren zur Störung der Tastenerkennung einer unkodierten Tastatur und Schaltung zur Ausführung des Verfahrens.
DE3886646T2 (de) Verfahren zur Herstellung von Öffnungen auf einer Anordnung von Elementarlinsen.
ATE73244T1 (de) Verfahren und vorrichtung zur eingabe von schriftzeichen in geraeten mit einer zifferntastatur.
DK0604687T3 (da) Fremgangsmåde til afledning af tegneegenskaber i et tegngenkendelsessystem
ATE188557T1 (de) Verfahren und anordung zur erzeugung von summeinformation-/rundungskontrolle-signal
EP0313207A3 (de) Verfahren und Vorrichtung zur Schriftzeicheneingabe
DE3785052D1 (de) Verfahren zur steuerung des programmablaufs bei der formularbearbeitung in datenverarbeitungsanlagen.
WO2003049423A3 (en) System and method for scaling an image
ATE126374T1 (de) Filter zur erweiterung und erosionsumwandlung von bildern.
Yoshimura et al. Writer identification based on the arc pattern transformation
ATE86057T1 (de) Verfahren zur bewertung von eingabeinformationen fuer eine rechnergesteuerte fernsprechvermittlungsanlage, insbesondere fernsprechnebenstellenanlage mit alphanumerisch aufgeteilten eingabeorganen in den jeweiligen endeinrichtungen.
Anderson et al. The Methods of Ritz, Galerkin, and Complementary Energy Applied to Some Nonconservative Problems of Elastic Stability
ARSENAL BENET WEAPONS LABORATORY
JPS55140975A (en) Character recognizing system
JPS6413197A (en) Pattern recognition equipment
DE59010609D1 (de) Verfahren und Vorrichtung zum Bearbeiten einer Zahlenkolonne
JPS57211676A (en) Optical character reader
JPS6431284A (en) System for analyzing document
O'Leary White, THE FRACTURED ELECTORATE (Book Review)

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: CP8 TECHNOLOGIES, LOUVECIENNES, FR