ES2048311T3 - Procedimiento de perturbacion de la identificacion de una tecla de un teclado no codificado y circuito para la puesta en practica del procedimiento. - Google Patents

Procedimiento de perturbacion de la identificacion de una tecla de un teclado no codificado y circuito para la puesta en practica del procedimiento.

Info

Publication number
ES2048311T3
ES2048311T3 ES89403570T ES89403570T ES2048311T3 ES 2048311 T3 ES2048311 T3 ES 2048311T3 ES 89403570 T ES89403570 T ES 89403570T ES 89403570 T ES89403570 T ES 89403570T ES 2048311 T3 ES2048311 T3 ES 2048311T3
Authority
ES
Spain
Prior art keywords
procedure
keyboard
circuit
uncoded
disturbance
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
ES89403570T
Other languages
English (en)
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.)
Bull SAS
Original Assignee
Bull SAS
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 SAS filed Critical Bull SAS
Application granted granted Critical
Publication of ES2048311T3 publication Critical patent/ES2048311T3/es
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 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)
  • 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)

Abstract

EL PRESENTE INVENTO SE REFIERE A UN PROCEDIMIENTO DE INTERFERENCIA Y AL CIRCUITO PARA LA APLICACION DEL PROCEDIMIENTO. EL PROCEDIMIENTO DE INTERFERENCIA CONSISTE: A) EN ENLAZAR EN LA SALIDA TODA LAS FILAS Y LAS COLUMNAS DEL TECLADO EN LAS SALIDAS DE UN PRIMER REGISTRO (160) DE UN INTERFAZ (16) DE ENTRADA-SALIDA PARALELO MEDIANTE UN CIRCUITO (163,166,164); B) EN ENLAZAR EN LAS ENTRADAS DEL SEGUNDO REGISTRO (167) DE LA INTERFAZ DE ENTRADA-SALIDA TODAS LAS FILAS Y COLUMNAS DEL TECLADO; C) EN DETERMINAR, DE FORMA ALEATORIA, EL ORDEN EN EL CUAL VAN A SER BARRIDAS LAS SALIDAS; D) EN COLOCAR AL MENOS UNA DE LAS SALIDAS EN "1" Y EN VER SI UNA DE LAS ENTRADAS CORRESPONDIENTES ESTA EN "1"; E) EN EL CASO CONTRARIO, EN BARRER UNA A UNA CADA UNA DE LAS LINEAS RESTANTES COLOCANDOLA EN "1" HASTA QUE LA ENTRADA ASOCIADA SE ENCUENTRE EN EL VALOR "1"; F) EN REITERAR LAS ETAPAS D) Y E) PARA DETERMINAR LA COLUMNA O, RESPECTIVAMENTE, LA LINEA CORRESPONDIENTE A LA TECLA DEL TECLADO PULSADA.
ES89403570T 1988-12-20 1989-12-20 Procedimiento de perturbacion de la identificacion de una tecla de un teclado no codificado y circuito para la puesta en practica del procedimiento. Expired - Lifetime ES2048311T3 (es)

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 (1)

Publication Number Publication Date
ES2048311T3 true ES2048311T3 (es) 1994-03-16

Family

ID=9373142

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89403570T Expired - Lifetime ES2048311T3 (es) 1988-12-20 1989-12-20 Procedimiento de perturbacion de la identificacion de una tecla de un teclado no codificado y circuito para la puesta en practica del procedimiento.

Country Status (7)

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

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
NO895116D0 (no) 1989-12-19
EP0375546A1 (fr) 1990-06-27
DE68910657D1 (de) 1993-12-16
NO177073C (no) 1995-07-12
FR2641656B1 (fr) 1991-08-02
DE68910657T2 (de) 1994-02-24
EP0375546B1 (fr) 1993-11-10
NO177073B (no) 1995-04-03
NO895116L (no) 1990-06-21
HK80697A (en) 1997-06-20
ATE97245T1 (de) 1993-11-15

Similar Documents

Publication Publication Date Title
IT1143500B (it) Sistema di analisi e di misura di gas in linea
FR87111E (fr) Dispositif formant élément de paroi souple ou analogue et applications diverses dudit dispositif, en particulier à la construction de réservoirs ou analogues
IT7849912A0 (it) Elemento piatto o wafer e dispositivo di fissaggio da usare in un sistema antifurto
ES2048311T3 (es) Procedimiento de perturbacion de la identificacion de una tecla de un teclado no codificado y circuito para la puesta en practica del procedimiento.
DE68920560D1 (de) Restprüfungsvorrichtung zur Fehlerkennung in Additions-, Substraktions-, Multiplikations-, Divisions- und Quadratwurzel-Operationen.
DE68908623D1 (de) Durch Gas unterstütztes Flotationsverfahren und Vorrichtung.
ES2090338T3 (es) Procedimiento y sistema de radiogoniometria.
ES2091427T3 (es) Dispositivo de tratamiento de las informaciones relativas a las averias detectadas por una o varias unidades centrales de un aeronave.
DE68915296D1 (de) Baugruppe für eine elektronische Vorrichtung.
ES2023100T3 (es) Unidad de teclado de seguridad, en particular para la composicion de un codigo confidencial.
ATE36085T1 (de) Verfahren zur elektronischen identifikation.
FR74516E (fr) Système de fermeture étanche de sacs, pochettes et articles analogues, en particulier de sacs à glace ou enveloppes analogues
US3003256A (en) Fraction-abacus
JPS5756946A (en) Logic wiring designing system
Keenan Some aspects of ties in Wilcoxon signed ranks
AT377613B (de) Messeinrichtung zur ermittlung der geschwindigkeit und/oder beschleunigung fuer gleislose landfahrzeuge, insbesondere radfahrzeuge
Wiltink A deficiency of natural deduction
AT281706B (de) Vorrichtung zum Einbringen von Gasen, z.B. von Luft, in Abwasser od.dgl. Flüssigkeiten
Hamilton Fernando Alegria, La poesia chilena. Origenes y desarrollo del siglo XVI al XIX (Book Review)
IT8617410A0 (it) Strumento provaintegrati universaleper circuiti integrati logici analogici e memorie.versatile per costruzioni sperimentali e collaudo prototipi a stadio singolo con sistema integrale di analisi,a scopo didattico,tecnico professionale.
JAKOSKY Mars volatile evolution: Implications of the recent measurement of O-17 in water from the SNC meteorites(Abstract Only)
IT8260489V0 (it) Orologio con quadrante e relative lancette impostati per la rilevazione del tempo anche in senso antiorario.
MX9305361A (es) Procedimiento y dispositivo para generar datos de lineas.
ATA445176A (de) Vorrichtung zur ausgabe von tabletten oder tablettenartigen korpern
SE8405182L (sv) Festforband

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 375546

Country of ref document: ES