WO1996005548A1 - Dispositif de clavier securise - Google Patents
Dispositif de clavier securise Download PDFInfo
- Publication number
- WO1996005548A1 WO1996005548A1 PCT/FR1995/001061 FR9501061W WO9605548A1 WO 1996005548 A1 WO1996005548 A1 WO 1996005548A1 FR 9501061 W FR9501061 W FR 9501061W WO 9605548 A1 WO9605548 A1 WO 9605548A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- keyboard device
- keyboard
- information
- individual
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
-
- 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
- G06F3/0202—Constructional details or processes of manufacture of the input device
- G06F3/021—Arrangements integrating additional peripherals in a keyboard, e.g. card or barcode reader, optical scanner
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
Definitions
- the present invention relates to a secure keyboard device for entering information into a machine.
- the invention relates to a secure keyboard device for entering information into a machine used to control it, which makes it possible to prevent fraud attempts consisting in intercepting the information entered using of the keyboard.
- an interfacing device which consists of a keyboard with mechanical keys or, more often than not, virtual keys, that is to say keys non-mechanical whose actuation is detected by a sensor, allowing the user to enter this control information.
- An object of the present invention is to provide a secure keyboard device which effectively prohibits fraud or burglary attempts mentioned above while being of limited implementation cost or at least compatible with the cost of installation.
- the secure keyboard device for entering information into a machine said keyboard comprising n sensitive zones, a detection sensor being associated with each sensitive zone to detect the actuation of the associated sensitive zone, and a set for managing said keyboard, is characterized in that it further comprises: n individual processing circuits (14i), n sensors (24), each circuit being associated with a sensor, each set consisting of an individual processing circuit and by the associated sensor having a physically monolithic structure forming a secure key, each circuit being associated with a sensitive area and comprising encryption means (22, 26, 28, 30) for detection or non-detection of 'activation of the associated sensitive zone; and electrical connection means for the transmission of information between said keyboard management unit and each of said individual processing circuits, said management unit and said individual circuits comprising means for periodically causing transmission to the management unit of encrypted information of activation or non-activation of each of said sensitive areas.
- the secure keyboard device for entering information into a machine is composed of N secure keys.
- Each secure, physically monolithic key consists of: a processing circuit, . a sensor (sensitive detection zone)
- Each processing circuit allows the encryption of the activation or non-activation information of the key supplied by the sensor, then this encrypted information is transmitted cyclically outside the secure key to the management assembly, by means Communication.
- the secure key is monolithic, that is to say made in the same integrated circuit (semiconductor) and therefore physically not removable without destruction. It is physically impossible to pick up a detection signal linked to the activation of the key.
- the picking up of the transit signals does not provide any usable information since each individual processing circuit emits a signal and that these signals are encrypted.
- the sensors associated with the sensitive areas are preferably capacitive sensors, or optionally optoelectronic detectors or even electromagnetic detectors of the damped oscillating circuit type.
- the detection component is produced directly on the semiconductor chip in which the various components of the electronic processing circuit are produced.
- FIG. 2 is a block diagram showing the structure of the individual processing circuit
- - Figure 3 is a simplified diagram showing the organization of the secure keyboard device; and - Figure 4 is a simplified vertical sectional view showing the installation of an individual processing circuit and its associated sensor in the case where it is a capacitive sensor.
- each sensitive zone is associated with a sensor not visible in FIG. 1, which makes it possible to detect that the sensitive zone has been activated with the finger or not.
- the assembly formed by the sensitive zone and its associated sensor thus constitutes a virtual key on the keyboard which delivers an electrical signal in the event of activation and no electrical signal for the non-activated sensitive zones.
- each virtual key Zi is associated with an individual processing circuit 14i which is shown diagrammatically in the figure and which will be described in more detail later.
- the various processing circuits 14i are connected to a bus 16 for transmitting information, the bus 16 itself being connected to a keyboard management unit 18 which, in the case of the present invention, has a particular structure as will explain it later.
- the keyboard management assembly is connected to the actual machine 20 in which the keyboard 10 makes it possible to introduce control information.
- FIG. 2 illustrates a preferred embodiment of an individual processing circuit 14i. This is organized around a microprocessor 22 which receives an activation or non-activation signal from the sensor 24 which is associated with it. As shown in Figure 2, the sensor 24 is disposed opposite the sensitive area Zi of the front face 12 of the keyboard.
- the microprocessor is associated in the individual processing circuit in a conventional manner with a ROM memory 26, a RAM memory 28 and an EEPROM memory 30.
- the output of the microprocessor, or more precisely the encrypted information which it generates, can be transmitted over the bus 16 via the interface circuit 32.
- the essential function of the circuit 14i is to generate encrypted information giving the activation or non-activation state of the sensor associated with it and providing an identification of the key with which it is associated.
- the ROM memory 26 comprises software allowing the implementation of an algorithm for encryption of this information which is executed by the microprocessor 22.
- the EEPROM memory preferably comprises a specific encryption key specific to the circuit 14i considered and information identifying the key concerned.
- the RAM memory makes it possible to temporarily store the corresponding encrypted information, which, as will be explained later, will be transmitted via the interface circuit 32 on the bus 16 in response to an interrogation message originating from the management assembly 18 .
- the various individual processing circuits 14i are periodically and cyclically interrogated by the management unit 18 to transmit back on the bus 16 the encrypted information corresponding to the identification of the key considered and to the state activated or not activated of the associated key.
- the management circuit essentially comprises a processing and processing circuit 40, a memory 42 and a clock 44.
- the processing circuit 40 sends on the bus 16 a series of interrogation instructions to each of the individual processing circuits 14i.
- the interrogation times are defined by the time base 44.
- the memory 42 includes all the software elements for the preparation of the information messages and for the processing of the encrypted information received in return from each of the individual processing circuits.
- This information that is to say essentially the information relating to the activated key, is transmitted to the controlled machine 20 in encrypted form or in plain text according to the modes of implementation. It is understood that the transit of the electrical signals between the individual processing circuits and the management assembly is completely independent of the activated virtual key. Only the content of the signal provides this information, but these signals are encrypted.
- FIG. 4 illustrates in vertical section the production of a virtual key and of its associated individual processing circuit in the case where the virtual key is of the capacitive type.
- the front plate 12 of the keyboard on which the sensitive zone Zi has been represented.
- a housing 50 On this plate, more precisely on its rear face, is fixed a housing 50, this box containing on the one hand the semiconductor chip 52 in which the various electronic components of the individual processing circuit 14i are made, and on the other hand the constituent elements of the associated sensor.
- two electrodes forming the armatures of a capacitor, respectively referenced 54 and 56 are produced on the upper face of the patch 52.
- the plates 54 and 56 are sufficiently close to the front face of the housing 12 so that, when the user places his finger 58 opposite the two electrodes, an analog signal corresponding to the activation of the virtual key concerned is transmitted.
- the chip 52 also includes the interface circuit between the electronic circuits proper of the chip 52 and the buses for transmitting the encrypted information produced by the individual processing circuits to the management assembly 18.
- the keyboard is thus secured by the combination of the following characteristics.
- the assembly constituted by the sensor associated with the sensitive area and the circuits of the individual processing circuit is monolithic and therefore does not, or practically not, allow the detection of the electrical signals produced.
- each individual processing circuit periodically and cyclically receives an interrogation message and that in response to this interrogation message it emits a response whether the corresponding key has been activated or not and that finally the signals circulating in the buses are encrypted makes it impossible, even when carrying out a large number of information retrievals, to associate with an electrical signal the identification of the activated key.
- the key constituting one of the parameters of the encryption algorithms is specific to each circuit. individual treatment. This makes keyboard fraud even more difficult.
- the sensor associated with each sensitive area is a capacitive sensor. It goes without saying that other types of sensors could be used.
- an optoelectronic sensor could be used, the optically sensitive element being deposited on the upper face of the semiconductor patch, the circuit box comprising an optical window.
- the front face 12 of the keyboard can be produced with a transparent material.
- the placement in the keyboard of fraudulent conductors intended to produce a spy matrix with capacitive detection can be visually detected.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95927766A EP0776498B1 (fr) | 1994-08-17 | 1995-08-08 | Dispositif de clavier securise |
DE69535642T DE69535642T2 (de) | 1994-08-17 | 1995-08-08 | Gesicherte tastatureinrichtung |
US08/793,007 US6049790A (en) | 1994-08-17 | 1995-08-08 | Protected keypad apparatus |
FI970641A FI117216B (fi) | 1994-08-17 | 1997-02-14 | Suojattu näppäimistölaite |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9410076A FR2723806A1 (fr) | 1994-08-17 | 1994-08-17 | Dispositif de clavier securise |
FR94/10076 | 1994-08-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996005548A1 true WO1996005548A1 (fr) | 1996-02-22 |
Family
ID=9466344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1995/001061 WO1996005548A1 (fr) | 1994-08-17 | 1995-08-08 | Dispositif de clavier securise |
Country Status (7)
Country | Link |
---|---|
US (1) | US6049790A (fr) |
EP (1) | EP0776498B1 (fr) |
AT (1) | ATE378644T1 (fr) |
DE (1) | DE69535642T2 (fr) |
FI (1) | FI117216B (fr) |
FR (1) | FR2723806A1 (fr) |
WO (1) | WO1996005548A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2333380A (en) * | 1998-01-19 | 1999-07-21 | Geoffrey Mcguire | Keyboard data collector attached to keyboard cable |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6549194B1 (en) * | 1999-10-01 | 2003-04-15 | Hewlett-Packard Development Company, L.P. | Method for secure pin entry on touch screen display |
GB2368950B (en) * | 2000-11-09 | 2004-06-16 | Ncr Int Inc | Encrypting keypad module |
EP1456739A2 (fr) * | 2001-12-14 | 2004-09-15 | Infineon Technologies AG | Bloc numerique integre dans des textiles comportant un circuit de lecture capacitif |
US7085542B2 (en) * | 2002-05-30 | 2006-08-01 | Motorola, Inc. | Portable device including a replaceable cover |
US7523470B2 (en) * | 2004-12-23 | 2009-04-21 | Lenovo Singapore Pte. Ltd. | System and method for detecting keyboard logging |
CA2571450A1 (fr) * | 2005-12-21 | 2007-06-21 | Nervo Security | Clavier a cryptage |
DE102007025947B4 (de) * | 2007-06-04 | 2009-02-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Integrierter kapazitiver Sensor |
US20090135031A1 (en) * | 2007-11-26 | 2009-05-28 | Key Systems, Inc. | Armored Capacitive Keypad |
US8347398B1 (en) * | 2009-09-23 | 2013-01-01 | Savvystuff Property Trust | Selected text obfuscation and encryption in a local, network and cloud computing environment |
US20140173717A1 (en) | 2011-03-21 | 2014-06-19 | Assa Abloy Ab | System and method of secure data entry |
FR3009107B1 (fr) * | 2013-07-26 | 2016-12-23 | Cie Ind Et Financiere D'ingenierie Ingenico | Dispositif de securisation d'un clavier capacitif et terminal correspondant. |
US11132854B2 (en) * | 2019-10-25 | 2021-09-28 | Sensormatic Electronics, LLC | Inconspicuous access control device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0248712A1 (fr) * | 1986-06-02 | 1987-12-09 | Electronique Serge Dassault | Unité de clavier de sécurité, en particulier pour la composition d'un code confidentiel |
GB2223115A (en) * | 1988-09-22 | 1990-03-28 | Bollmann Limited H | Keyboard |
US4926173A (en) * | 1988-11-10 | 1990-05-15 | Ncr Corporation | Data entry keyboard apparatus |
DE4126760A1 (de) * | 1990-09-17 | 1992-03-19 | Siemens Ag | Verschluesselungsverfahren und tastatureingabegeraet fuer sicherheitsrelevante daten |
EP0573719A1 (fr) * | 1992-06-12 | 1993-12-15 | Dassault Automatismes Et Telecommunications | Unité à clavier de sécurité perfectionnée |
FR2693815A1 (fr) * | 1992-07-15 | 1994-01-21 | Gemplus Card Int | Procédé de protection d'un clavier de saisie de données, et clavier pour mise en Óoeuvre. |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4333090A (en) * | 1980-05-05 | 1982-06-01 | Hirsch Steven B | Secure keyboard input terminal |
US4593384A (en) * | 1984-12-21 | 1986-06-03 | Ncr Corporation | Security device for the secure storage of sensitive data |
ES294319Y (es) * | 1986-05-23 | 1987-06-01 | Pijuan Miquel Ramon | Mango perfeccionado para articulos del hogar |
US4962530A (en) * | 1987-09-10 | 1990-10-09 | Computer Security Corporation | System for cryptographing and identification |
US5389738A (en) * | 1992-05-04 | 1995-02-14 | Motorola, Inc. | Tamperproof arrangement for an integrated circuit device |
-
1994
- 1994-08-17 FR FR9410076A patent/FR2723806A1/fr active Granted
-
1995
- 1995-08-08 US US08/793,007 patent/US6049790A/en not_active Expired - Lifetime
- 1995-08-08 DE DE69535642T patent/DE69535642T2/de not_active Expired - Lifetime
- 1995-08-08 EP EP95927766A patent/EP0776498B1/fr not_active Expired - Lifetime
- 1995-08-08 WO PCT/FR1995/001061 patent/WO1996005548A1/fr active IP Right Grant
- 1995-08-08 AT AT95927766T patent/ATE378644T1/de not_active IP Right Cessation
-
1997
- 1997-02-14 FI FI970641A patent/FI117216B/fi not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0248712A1 (fr) * | 1986-06-02 | 1987-12-09 | Electronique Serge Dassault | Unité de clavier de sécurité, en particulier pour la composition d'un code confidentiel |
GB2223115A (en) * | 1988-09-22 | 1990-03-28 | Bollmann Limited H | Keyboard |
US4926173A (en) * | 1988-11-10 | 1990-05-15 | Ncr Corporation | Data entry keyboard apparatus |
DE4126760A1 (de) * | 1990-09-17 | 1992-03-19 | Siemens Ag | Verschluesselungsverfahren und tastatureingabegeraet fuer sicherheitsrelevante daten |
EP0573719A1 (fr) * | 1992-06-12 | 1993-12-15 | Dassault Automatismes Et Telecommunications | Unité à clavier de sécurité perfectionnée |
FR2693815A1 (fr) * | 1992-07-15 | 1994-01-21 | Gemplus Card Int | Procédé de protection d'un clavier de saisie de données, et clavier pour mise en Óoeuvre. |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2333380A (en) * | 1998-01-19 | 1999-07-21 | Geoffrey Mcguire | Keyboard data collector attached to keyboard cable |
Also Published As
Publication number | Publication date |
---|---|
ATE378644T1 (de) | 2007-11-15 |
FR2723806B1 (fr) | 1997-02-21 |
DE69535642D1 (de) | 2007-12-27 |
FR2723806A1 (fr) | 1996-02-23 |
EP0776498A1 (fr) | 1997-06-04 |
DE69535642T2 (de) | 2008-10-30 |
FI117216B (fi) | 2006-07-31 |
FI970641A (fi) | 1997-02-14 |
FI970641A0 (fi) | 1997-02-14 |
EP0776498B1 (fr) | 2007-11-14 |
US6049790A (en) | 2000-04-11 |
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