EP0888632A1 - Ultraschall-tastaturschutz - Google Patents
Ultraschall-tastaturschutzInfo
- Publication number
- EP0888632A1 EP0888632A1 EP97903263A EP97903263A EP0888632A1 EP 0888632 A1 EP0888632 A1 EP 0888632A1 EP 97903263 A EP97903263 A EP 97903263A EP 97903263 A EP97903263 A EP 97903263A EP 0888632 A1 EP0888632 A1 EP 0888632A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sound
- keyboard
- signal
- receiver
- sound generator
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F19/00—Complete banking systems; Coded card-freed arrangements adapted for dispensing or receiving monies or the like and posting such transactions to existing accounts, e.g. automatic teller machines
- G07F19/20—Automatic teller machines [ATMs]
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F19/00—Complete banking systems; Coded card-freed arrangements adapted for dispensing or receiving monies or the like and posting such transactions to existing accounts, e.g. automatic teller machines
- G07F19/20—Automatic teller machines [ATMs]
- G07F19/205—Housing aspects of ATMs
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
- G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
- G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
- G07G3/00—Alarm indicators, e.g. bells
- G07G3/003—Anti-theft control
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2239/00—Miscellaneous
- H01H2239/038—Anti-vandalism
Definitions
- the invention relates to the detection of an object covering the surface of a keyboard.
- Self-service devices generally have a keyboard on which the user enters confidential or secret data, in particular a secret number called a PIN (Personal Identification Number).
- a keyboard can be manipulated using similar keyboards or other objects.
- a device that detects such manipulation must, however, be inconspicuous, robust and secured against willful damage (vandalism).
- the invention solves the problem by means of a sound transducer mounted inside the keyboard, which preferably emits ultrasonic waves through the surface of the keyboard without the surface being visibly changed.
- the protective device is thus inconspicuous and continues to be protected against vandalism. Since the keyboard is protected against inspection by a hood anyway, a receiver can be attached above the keyboard, which detects the emitted ultrasound waves and accordingly reports a proper condition. Show it:
- FIG. 1 shows an arrangement of a keyboard with ultrasound transmitter and receiver
- FIG. 2 shows a possible attachment of an ultrasound transmitter in the frame of a keyboard.
- a keyboard on base plate 10 under a hood 13 is shown in a highly simplified and schematic manner in FIG. 1.
- the keyboard consists of a key frame 11 and individual keys 12a..d.
- an ultrasonic transmitter 14 is attached to a web between the keys 12a..d, which is electrically excited.
- An ultrasound receiver 15 is attached above the keyboard, in the example in the hood 13 protecting the keyboard. The signal it receives is amplified, rectified and fed to a threshold detector.
- the output of the threshold detector is connected to a control unit for the device using the keyboard as an input device. As long as the threshold value detector reports the presence of a signal to the control unit, the device remains ready for use and uses the keyboard as an input device.
- the threshold value detector therefore changes its signal to the control unit, which reacts accordingly. If the device is in the ready state, loss of ultrasound transmission, reported by the threshold value detector, is interpreted as manipulation and the device is put into a fault state. This does not apply when a user is prompted to enter data because the weakening can come from the user's hand. The device is thus protected in that the threshold value detector must report the presence of a signal before the start of each transaction by an operator of the keyboard.
- the ultrasound transmitter is preferably attached to the keyboard on the inner surface of a key or a key frame.
- the material is acoustically thin enough so that an easily detectable signal is emitted from the keyboard without further measures, without the presence of the ultrasound transmitter becoming visible. Since the surface of the keyboard is undisturbed, it cannot be easily recognized where the signal is emitted, so that attempts at manipulation are more difficult.
- a blind hole is let into the inside of a web of the key frame 11, as shown in FIG. 2, so that the ultrasonic waves can escape through the remaining material. Since it is a blind hole, the surface remains unchanged.
- a piezoceramic plate is inserted and glued into the blind hole as an ultrasound transmitter, which is provided in a known manner with electrical contacts and connections which are connected to an alternating voltage source with a suitable frequency. This creates an ultrasound-radiating transducer that is not visible from the outside and cannot be manipulated.
- a key in particular a blind key, can also be used. This is advantageous if the webs between the keys are very narrow. If the ultrasound radiation is in the low-frequency range, a spherical radiation occurs, so that the receiver cannot be attached directly above the keyboard, but even laterally.
- Piezo or electrodynamic-based loudspeakers are also available, which radiate not only in the audible but also in the ultrasound range.
- a simple variant of the invention therefore consists in mounting one below the keyboard so that the sound radiation passes through the slots between the keys and the key frame. An acoustic coupling with a key or the key frame is not necessary.
- Electret microphones can also be used as receivers, the frequency range of which usually extends into the ultrasound range.
- Another variant of the invention uses a reflector instead of the ultrasound receiver. Due to the duration of the signal, the transmitter can be used in the manner of an echo sounder to emit short signals and then serve as a receiver in a transmission pause. Instead of this, a second ultrasonic transducer can also be installed in the keyboard as the receiver, so that the transmitter and receiver are separated. It is also possible to swap the role of the encoder and receiver statically or dynamically.
- the excitation signal can also be modulated and the phase position of the modulation can be determined. Manipulations can thus be prevented which pick up a signal and emit it again through a similar transmitter, which will generally lead to a phase shift or change in transit time and thus be recognized. A pseudo noise is very useful as modulation because it cannot be simulated easily. The then necessary correlation analysis can be carried out by a signal processor.
- the sender and receiver can also be swapped for audible signals.
- An electromagnetic tongue in the manner of a buzzer can also serve as the transmitter, which strikes the key frame, for example, and thus sets it in vibration, which is emitted by the key frame.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Input From Keyboards Or The Like (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19605092 | 1996-02-12 | ||
DE19605092A DE19605092A1 (de) | 1996-02-12 | 1996-02-12 | Ultraschall-Tastaturschutz |
PCT/EP1997/000643 WO1997029499A1 (de) | 1996-02-12 | 1997-02-12 | Ultraschall-tastaturschutz |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0888632A1 true EP0888632A1 (de) | 1999-01-07 |
EP0888632B1 EP0888632B1 (de) | 1999-12-22 |
Family
ID=7785183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97903263A Expired - Lifetime EP0888632B1 (de) | 1996-02-12 | 1997-02-12 | Ultraschall-tastaturschutz |
Country Status (6)
Country | Link |
---|---|
US (1) | US6011470A (de) |
EP (1) | EP0888632B1 (de) |
AT (1) | ATE188066T1 (de) |
BR (1) | BR9707412A (de) |
DE (2) | DE19605092A1 (de) |
WO (1) | WO1997029499A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19739771A1 (de) * | 1997-09-10 | 1999-03-11 | Siemens Nixdorf Inf Syst | Anordnung zum Erkennen von vor einem Bedienelement eines Gerätes angebrachten Gegenständen |
DK199900195U3 (da) * | 1998-08-20 | 1999-08-13 | Nowofab Aps | Afskærmning til en betalingsterminal |
NL1011783C2 (nl) * | 1999-04-13 | 2000-10-16 | Witteman Johannus Hermanus M | Geldautomaat en PIN-betaalautomaat voorzien van een toetsenbord. |
US6788793B2 (en) * | 2002-06-04 | 2004-09-07 | Motorola, Inc. | Speaker system for an electronic device |
GB2421300A (en) * | 2004-12-18 | 2006-06-21 | Nigel Leonard Mason | Anti-skimming device for use with cash machines |
US7791475B2 (en) * | 2008-03-26 | 2010-09-07 | Honeywell International Inc. | Apparatus and method of blockage detection |
US20140269214A1 (en) | 2013-03-15 | 2014-09-18 | Elwha LLC, a limited liability company of the State of Delaware | Portable electronic device directed audio targeted multi-user system and method |
US9886941B2 (en) | 2013-03-15 | 2018-02-06 | Elwha Llc | Portable electronic device directed audio targeted user system and method |
US10575093B2 (en) | 2013-03-15 | 2020-02-25 | Elwha Llc | Portable electronic device directed audio emitter arrangement system and method |
US10181314B2 (en) | 2013-03-15 | 2019-01-15 | Elwha Llc | Portable electronic device directed audio targeted multiple user system and method |
US10291983B2 (en) * | 2013-03-15 | 2019-05-14 | Elwha Llc | Portable electronic device directed audio system and method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3003887A1 (de) * | 1980-02-02 | 1981-08-13 | Robert Bosch Gmbh, 7000 Stuttgart | Ueberwachungseinrichtung mit ultraschall |
US5149986A (en) * | 1989-06-20 | 1992-09-22 | Otis Elevator Company | Electronic control button operated by sound absorption |
US5438318A (en) * | 1990-06-01 | 1995-08-01 | Electro-Univers-Diffusion | Movement detector for detecting movement within a predetermined space |
DE9105845U1 (de) * | 1991-03-05 | 1991-08-22 | Schmid, Friedrich, Ing.(Grad.), 8417 Lappersdorf, De | |
DE4421858A1 (de) * | 1994-06-22 | 1996-01-04 | Nsm Ag | Vorrichtung zur Verhinderung von Manipulationen an Tischspielgeräten |
IT1275766B1 (it) * | 1994-07-16 | 1997-10-17 | Kiekert Ag | Procedimento per il controllo dell'abitacolo in un autoveicolo |
US5757271A (en) * | 1996-11-12 | 1998-05-26 | International Business Machines Corporation | Portable computer and method of providing security for an electronic device |
-
1996
- 1996-02-12 DE DE19605092A patent/DE19605092A1/de not_active Withdrawn
-
1997
- 1997-02-12 AT AT97903263T patent/ATE188066T1/de not_active IP Right Cessation
- 1997-02-12 EP EP97903263A patent/EP0888632B1/de not_active Expired - Lifetime
- 1997-02-12 BR BR9707412-8A patent/BR9707412A/pt not_active Application Discontinuation
- 1997-02-12 WO PCT/EP1997/000643 patent/WO1997029499A1/de active IP Right Grant
- 1997-02-12 DE DE59700895T patent/DE59700895D1/de not_active Expired - Fee Related
- 1997-02-12 US US09/117,971 patent/US6011470A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9729499A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE188066T1 (de) | 2000-01-15 |
US6011470A (en) | 2000-01-04 |
DE59700895D1 (de) | 2000-01-27 |
WO1997029499A1 (de) | 1997-08-14 |
BR9707412A (pt) | 1999-11-23 |
DE19605092A1 (de) | 1997-08-14 |
EP0888632B1 (de) | 1999-12-22 |
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