US20020075241A1 - Methods and apparatus for providing secure signals from a touch panel display - Google Patents
Methods and apparatus for providing secure signals from a touch panel display Download PDFInfo
- Publication number
- US20020075241A1 US20020075241A1 US09/391,767 US39176799A US2002075241A1 US 20020075241 A1 US20020075241 A1 US 20020075241A1 US 39176799 A US39176799 A US 39176799A US 2002075241 A1 US2002075241 A1 US 2002075241A1
- Authority
- US
- United States
- Prior art keywords
- touch panel
- signal
- reference signal
- varying
- touch screen
- 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
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- 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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
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)
- User Interface Of Digital Computer (AREA)
- Position Input By Displaying (AREA)
Abstract
Description
- The present invention relates generally to improvements in touch panel displays. More specifically, the present invention relates methods and apparatus for providing enhanced security to signals from a touch panel display, such as the transparent touch panel displays utilized in automatic teller machines.
- A transparent touch panel display, or touch screen, produces electrical signals which correspond to a position on the touch screen being touched. Touch screens have found wide spread use as user input devices for electronic transaction terminal devices such as automated teller machines (ATMs) and point of sale (POS) terminals. During certain payment, cash withdrawal, or other transactions, a personal identification number (PIN) is entered on the payment terminal's touch screen by the user as a form of identification. Since this PIN is considered highly confidential, it could be extremely damaging to the user's account if a third party was able to eavesdrop on the electrical signals from a touch screen during PIN entry and reproduce those signals during a subsequent transaction to falsely identify themselves as the PIN assignee. As devices such as ATMs are located in less and less carefully supervised locations, efforts at fraud may be more determined and sophisticated. Thus, enhanced security features are highly advantageous.
- Accordingly, it would be highly advantageous to provide enhanced security by preventing a third party from eavesdropping on the electrical signals produced by a touch screen during the entry of confidential information, such as a PIN or the like.
- The present invention advantageously provides methods and apparatus to prevent third parties from eavesdropping on a touch screen and reproducing meaningful information from the electrical signals produced by the touch screen during the entry of a PIN or other confidential information. The touch screen may operate resistively, capacitively, or in another suitable manner. According to one aspect, the present invention provides a varying reference voltage for input to a touch screen panel. The varying reference voltage is utilized by the touch screen to generate an x-axis signal and a y-axis signal which correspond to a position touched on the touch screen. According to another aspect, the present invention provides a varying reference current for input to a touch screen panel.
- A more complete understanding of the present invention, as well as further features and advantages of the invention, will be apparent from the following detailed description and the accompanying drawings.
- FIG. 1 shows an automated teller machine in accordance with the present invention;
- FIG. 2 shows a touch screen in accordance with the present invention;
- FIG. 3 shows a block diagram of a touch screen and touch screen circuitry in accordance with the present invention;
- FIGS. 4, 5 and6 show exemplary varying signal waveforms for use in conjunction with the touch screen and circuitry of FIGS. 2 and 3; and
- FIG. 7 shows a flowchart of a method of providing enhanced security on a touch screen in accordance with the present invention.
- The present invention now will be described more fully with reference to the accompanying drawings, in which a currently preferred embodiment of the invention is shown. However, this invention may be embodied in various forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, the representative embodiment is described in detail so that this disclosure will be thorough and complete, and will fully convey the scope, structure, operation, functionality, and potential of applicability of the invention to those skilled in the art.
- In the embodiments of the present invention described below, a varying reference signal is used. While the varying reference signal is described in terms of varying voltage, the present invention should not be construed as limited to varying voltage. Other suitable signal characteristics, such as varying current or varying phase, are utilized according to other aspects of the present invention.
- Referring to the drawings, FIG. 1 shows simplified perspective view of a self-
service terminal 10, such as an automated teller machine (ATM), in accordance with the present invention. TheATM 10 includes atouch screen 12, which is shown in more detail in FIG. 2. Theterminal 10 may suitably include other components, depending on the use to which the terminal is applied. For example, there may be a card slot 16 for receiving a user's ID card, aslot 18 for delivering articles, such as currency notes, to the user, and areceipt slot 20 for issuing a receipt containing details of a transaction effected by theterminal 10. - Referring to FIG. 2, there is shown a graphical representation of the
touch screen 12 with its x-axis and y-axis labeled for ease of illustration. As described below, when touched, thetouch screen 12 produces electrical signals that correspond to the position on the touch screen being touched, allowing the position of the touch to be determined according to its location on the x-axis and y-axis. In the case of a resistive touch screen, the electrical signals from thetouch screen 12 are relative to a reference voltage that is applied to thetouch screen 12 by external circuitry. By measuring the signals (VX, VY) returned from thetouch screen 12 at the position of the touch and comparing them to the reference signal VRef, the position touched can be derived by various known methods. For example, when the touch screen is touched at a position 22 shown in FIG. 2, VX is approximately {fraction (2/3)} of VRef and VY is approximately {fraction (1/2)} of VRef. - Referring to FIG. 3, there is shown a diagram of
touch screen circuitry 30 in accordance with the present invention. Thecircuitry 30 includes thetouch screen 12, an x-axis analog-to-digital (A/D)converter 32, an y-axis AID converter 34, a digital-to-analog (D/A) converter 36, and amicroprocessor 38. As shown in FIG. 3, themicroprocessor 38 is connected to thetouch screen 12 through the x-axis A/D converter 32, the y-axis A/D converter 34, and the D/A converter 36. - The D/A converter36 receives a digital VRef signal 40 generated by the
processor 38 and produces a corresponding analog VRef signal 42 which is input to thetouch screen 12. The x-axis A/D converter 32 receives an analog VX signal 44 from thetouch screen 12 and produces a corresponding digital VX signal 46 which is input to themicroprocessor 38. The y-axis A/D converter 34 receives an analog VY signal 48 from thetouch screen 12 and produces a corresponding digital VY signal 50 which is input to themicroprocessor 38. Themicroprocessor 38 controls thereference voltage 40 and determines the position touched on the touch screen by comparing the VRef signal 40 with the digital VX signal 46 and the digital VY signal 50. - FIGS. 4 and 5 show timing diagrams60 and 70, respectively, of the signal waveforms resulting from a continuous touch at the position 22 of FIG. 2. As shown in the signal timing diagrams 60 and 70, the
microprocessor 38 provides a varying reference signal VRef signal 40 to the D/A converter 36, which results in a corresponding varying analog VRef signal 42 being input to thetouch screen 12. The VX signal 46 and the VY signal 50 returned to the processor are determined with respect to thevarying signal 40. Thereference signal V Ref 40 may be varied according to a random generation sequence, a predetermined algorithm, a look-up table, or some other suitable mechanism for controlling voltage variation to substantially decrease the likelihood that an eavesdropper on the signal will gain useful information. - The
reference signal 40 and thesignals 46 and 50 are synchronized in time to correctly identify a given position. In other words, thesignals 46 and 50 returned from thetouch screen 12 at a given point in time are meaningful only when thereference signal 40 at that point in time is known by themicroprocessor 38. Thus, the information entered on thetouch screen 12 corresponding tosignals 46 and 50 is extremely difficult to reproduce by electronically eavesdropping onsignals screen output signals - As an example, assume that a position of the numeral “5” on the
touch screen 12 of FIG. 1 corresponds to the point VX(5), VY(5), where VX(5)=0.6VRef and VY(5)=0.6VRef, and that a position of the numeral “9” corresponds to the point VX(9), VY(9), where VX(9)=0.8VRef and VY(5)=0.4VRef. Further, assume that VRef has a range of 0 to 6 volts. FIG. 6 shows an exemplary timing diagram 80 of the signal waveforms resulting from a touch of the numeral “5” at time T1 followed by a touch of the numeral “9” at time T2. At time T1, VRef=3 V and thus VX(5)=1.8V and VY(5)=1.8V. At time T2, VRef=5V and thus VX(9)=4.5V and VY(9)=2.0V. - FIG. 7 shows a
method 90 of providing enhanced security to a touch screen in accordance with the present invention. In afirst step 90, a varying reference signal (such as signal VRef) is delivered to a touch screen (such as touch screen 12). When the touch screen is touched, in asecond step 92, positional signals (such as positional signals VX and VY) are generated based upon the position touched and the reference signal. Instep 94, the position touched is determined utilizing the positional signals and the value of the reference signal corresponding to the point in time when the screen was touched. - It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/391,767 US6411284B1 (en) | 1999-09-08 | 1999-09-08 | Methods and apparatus for providing secure signals from a touch panel display |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/391,767 US6411284B1 (en) | 1999-09-08 | 1999-09-08 | Methods and apparatus for providing secure signals from a touch panel display |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020075241A1 true US20020075241A1 (en) | 2002-06-20 |
US6411284B1 US6411284B1 (en) | 2002-06-25 |
Family
ID=23547851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/391,767 Expired - Lifetime US6411284B1 (en) | 1999-09-08 | 1999-09-08 | Methods and apparatus for providing secure signals from a touch panel display |
Country Status (1)
Country | Link |
---|---|
US (1) | US6411284B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2544153A1 (en) * | 2011-07-04 | 2013-01-09 | ZF Friedrichshafen AG | Identification technique |
US9229549B1 (en) * | 2007-05-29 | 2016-01-05 | Cypress Semiconductor Corporation | Random scanning technique for secure transactions entered with capacitive sensor input device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6630896B1 (en) * | 2000-05-16 | 2003-10-07 | Ncr Corporation | System and method for preventing detection of touch screen input data |
US7392396B2 (en) * | 2002-03-07 | 2008-06-24 | Symbol Technologies, Inc. | Transaction device with noise signal encryption |
US6996456B2 (en) * | 2002-10-21 | 2006-02-07 | Fsi International, Inc. | Robot with tactile sensor device |
US7250940B2 (en) * | 2003-12-31 | 2007-07-31 | Symbol Technologies, Inc. | Touch screen apparatus and method therefore |
US7999797B2 (en) * | 2006-12-26 | 2011-08-16 | Sony Ericsson Mobile Communications Ab | Detecting and locating a touch or a tap on an input surface |
US8144130B2 (en) * | 2007-11-20 | 2012-03-27 | I-Pos Systems, Llc | Secured touch screen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5801340A (en) * | 1995-06-29 | 1998-09-01 | Invotronics Manufacturing | Proximity sensor |
US5841427A (en) * | 1995-12-22 | 1998-11-24 | Symbios, Inc. | Method and apparatus for canceling an offset signal in an electrostatic digitizing tablet |
US5818430A (en) * | 1997-01-24 | 1998-10-06 | C.A.M. Graphics Co., Inc. | Touch screen |
-
1999
- 1999-09-08 US US09/391,767 patent/US6411284B1/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9229549B1 (en) * | 2007-05-29 | 2016-01-05 | Cypress Semiconductor Corporation | Random scanning technique for secure transactions entered with capacitive sensor input device |
EP2544153A1 (en) * | 2011-07-04 | 2013-01-09 | ZF Friedrichshafen AG | Identification technique |
WO2013004441A1 (en) * | 2011-07-04 | 2013-01-10 | Zf Friedrichshafen Ag | Identification technique |
CN103650005A (en) * | 2011-07-04 | 2014-03-19 | Zf腓德烈斯哈芬股份公司 | Identification technique |
Also Published As
Publication number | Publication date |
---|---|
US6411284B1 (en) | 2002-06-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4304990A (en) | Multilevel security apparatus and method | |
US8950680B2 (en) | Multifunction removable cover for portable payment device | |
US7175073B2 (en) | Secure cell phone for ATM transactions | |
US6715078B1 (en) | Methods and apparatus for secure personal identification number and data encryption | |
AU695518B2 (en) | Methods and apparatus for providing a prepaid, remote entry customer account | |
US6920435B2 (en) | Tokenless biometric electronic transactions using an audio signature to identify the transaction processor | |
US8690055B2 (en) | Electronic card | |
US6954133B2 (en) | Bio-metric smart card, bio-metric smart card reader, and method of use | |
US7996325B2 (en) | Microbilling using a trust management system | |
CN1838549B (en) | Information processing system, information processing apparatus, methods, program and recording medium | |
US20010011684A1 (en) | Systems for authenticating use of transaction cards having a magnetic stripe | |
EP2339550A1 (en) | One-Time password credit/debit card | |
ZA200207253B (en) | Electronic credit card-ECC. | |
CA2371134A1 (en) | Wireless portable device capable of performing various functions with enhanced security | |
US6411284B1 (en) | Methods and apparatus for providing secure signals from a touch panel display | |
WO2005008399A2 (en) | Systems and methods for facilitating transactions | |
EP0965961A1 (en) | Self service terminal display screen | |
JP6060521B2 (en) | Transaction apparatus and transaction program | |
JP6796513B2 (en) | Trading system and trading method | |
US20040153417A1 (en) | Remotely synchronizing financial authentication | |
KR20190055890A (en) | Financial apparatus and transaction method using biometrics | |
JP2611218B2 (en) | Small data processing device | |
JP2010033212A (en) | Password generation method, password generation system, and the like | |
JPH10105624A (en) | Telegraphic message enciphering processing system | |
US20070288369A1 (en) | Method for payment processing, billhead for payment processing, billhead generation facility and facility for communicating with a financial institution |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NCR CORPORATION, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JUNGHANS, DAVID RICHARD;REEL/FRAME:010239/0097 Effective date: 19990901 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT, ILLINOIS Free format text: SECURITY AGREEMENT;ASSIGNORS:NCR CORPORATION;NCR INTERNATIONAL, INC.;REEL/FRAME:032034/0010 Effective date: 20140106 Owner name: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT Free format text: SECURITY AGREEMENT;ASSIGNORS:NCR CORPORATION;NCR INTERNATIONAL, INC.;REEL/FRAME:032034/0010 Effective date: 20140106 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., ILLINOIS Free format text: SECURITY AGREEMENT;ASSIGNORS:NCR CORPORATION;NCR INTERNATIONAL, INC.;REEL/FRAME:038646/0001 Effective date: 20160331 |
|
AS | Assignment |
Owner name: NCR VOYIX CORPORATION, GEORGIA Free format text: RELEASE OF PATENT SECURITY INTEREST;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:065346/0531 Effective date: 20231016 Owner name: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT, NORTH CAROLINA Free format text: SECURITY INTEREST;ASSIGNOR:NCR VOYIX CORPORATION;REEL/FRAME:065346/0168 Effective date: 20231016 |
|
AS | Assignment |
Owner name: NCR VOYIX CORPORATION, GEORGIA Free format text: CHANGE OF NAME;ASSIGNOR:NCR CORPORATION;REEL/FRAME:065820/0704 Effective date: 20231013 |