CN103473517A - Password-stealing-preventing random-variation numeric keypad - Google Patents
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- CN103473517A CN103473517A CN2013103992076A CN201310399207A CN103473517A CN 103473517 A CN103473517 A CN 103473517A CN 2013103992076 A CN2013103992076 A CN 2013103992076A CN 201310399207 A CN201310399207 A CN 201310399207A CN 103473517 A CN103473517 A CN 103473517A
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Abstract
The invention relates to a password-stealing-preventing random-variation numeric keypad comprising function keys, numeric keys and a control circuit. Each key comprises a keycap, a digital tube display, conductive rubber triggers, support sleeves, support pillars, a thin-film touch panel and a circuit board, the thin-film touch panel is fixedly mounted on the circuit board, the conductive rubber triggers are fixedly mounted on the thin-film touch panel, the keycap is mounted on the conductive rubber triggers through the support sleeves and the support pillars in a guiding and sliding manner, and digital tubes are fixedly mounted on the thin-film touch panel below the middle of the keycap. The keypad aims to overcome defects of a traditional password keypad, and an 89C51 single chip microcomputer generates random numbers by the aid of an internal timer and a method of interrupt coalescing; the dynamic random-number password-stealing-preventing keypad, allowing positions of numbers from 0 to 9 displayed by the LED seven-segment digital tubes changing randomly, can not only be applied to password entering of ATMs (automatic teller machines), but also be widely applied to various other devices, utilizing keypads for entering passwords, such as POSs (points of sales), safety boxes and antitheft doors, and is of great significance to development of national economy and protection of civil information.
Description
Technical field
The present invention relates to the keyboard that ATM cash dispenser, POS machine, self-aided terminal etc. relate to Password Input, especially a kind of cipher anti theft random variation numeric keypad.
Technical background
Along with the development of economy and technology, the equipment such as ATM cash dispenser, POS machine, self-aided terminal are day by day universal, when offering convenience to people, also have the potential safety hazards such as password leakage.Present stage, what in most financial sector, use is traditional input keyboard.The keyboard value of this keyboard key is fixed, confidentiality and poor stability, and the offender just can analyze user's numerical information separately by observing the user to the operation of each key mapping.Various password theft cases are in rising trend in recent years, brought very large economic loss to country and individual.Simultaneously, due to China's present case, in bank, store or other, need the public arena of Password Input can not guarantee the distance of effectively maintaining secrecy, people's property safety has been subject to great threat.
Along with people have had higher requirement to security, confidentiality, the accuracy of information transmission, particularly, when using unattended finance self-help terminal, more need a kind of safe and reliable input mode.
By retrieval, not yet find the patent document identical with the present patent application.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, a kind of cipher anti theft random variation numeric keypad that key mapping numeral stochastic and dynamic changes function that has is provided.
The objective of the invention is to be achieved through the following technical solutions:
A kind of cipher anti theft random variation numeric keypad, comprise function button, digital keys and control circuit, the contour structures of two class buttons is identical with standard cipher input keyboard size, it is characterized in that: described button comprises keycap, the charactron display, the conductive rubber trigger, support set, support column, film touch panel and circuit board, be fixedly mounted with the film touch panel on circuit board, be fixedly mounted with the conductive rubber trigger on the film touch panel, pass through support set on the conductive rubber trigger, the support column guiding keycap that is slidably installed, be fixedly mounted with charactron on film touch panel below the keycap middle part.
And, be fixedly mounted with four support sets the film touch panel of charactron display periphery is uniform, bottom all coaxially is fixedly mounted with a conductive rubber trigger in each support set, the coaxial corresponding setting-in keycap of each support set internal upper part the be fixedly mounted with support column of going to the bottom, and support column and support set are for being slidably installed.
And, transmittance reduction, the complete opaque form of the brim of a hat around the keycap middle part of described button is transparent, transparent.
And the side in the support column lower end is shaped with a dogging 5, this dogging is installed on the made hook groove of support set in the upper limit site of keycap.
And, described circuit board control circuit comprises 89C51 single-chip microcomputer, data latches, charactron display, digital keys and function button, the random number produced by the 89C51 single-chip microcomputer, make the each position random variation of 0-9 numeral shown on keyboard, wait for Password Input, and press the position that " confirmation " button can change ten random numbers again.
And the random number that each 89C51 single-chip microcomputer produces is presented at above charactron by data latches and with the form of static scanning; Button adopts line to be connected with the single-chip microcomputer corresponding ports respectively with alignment, determines position realization that button the is pressed input to respective digital with the line scanning method, and shows " * " number at liquid crystal display and corresponding password receiver simultaneously, realizes cryptoguard; After the input numeral, by after " confirmations " function button confirmation, by the 89C51 single-chip microcomputer, send password, the position distribution of the random number of all buttons will regenerate simultaneously, for next Password Input is prepared, i.e. and this EO.
And, described 89C51 single-chip microcomputer is every display with bright ten LED seven segment digital tubes of one one land wheel flow point by data latches, the position choosing that is each LED seven segment digital tubes is chosen in turn, a plurality of LED seven segment digital tubes share one group of Duan Xuan, the section select data only contraposition select selected LED seven segment digital tubes effective.
Advantage of the present invention and good effect are:
1, the present invention is directed to the defect that the conventional cipher keyboard exists, by the 89C51 single-chip microcomputer, utilize timer internal and the method for interrupting combination to produce random number, the dynamic random numeral anti-theft cipher keyboard of the position random variation that the 0-9 numeral shown at the LED seven segment digital tubes is each, not only can be applicable to the Password Input of ATM, also can be widely used in other various equipment that utilizes keyboard input password, as POS machine, safety cabinet, antitheft door etc.USB interface can realize plug and play simultaneously; improve the dirigibility of keyboard; high speed data transmission can be saved time; meet the user and use the demand of keyboard in different occasions; realize that random digit dynamically shows to guarantee the security of inputting interface, has great meaning to the development of national economy and the protection of citizen's information.
2, the present invention utilizes timer internal and the method for interrupting combination to produce random number by the 89C51 single-chip microcomputer, makes on keyboard the each position random variation of numeral that shows 0-9, and carries out Password Input by corresponding button.The keycap top of each button adopts central, clear and transmittance reduction on every side, and the side Implementing Complete is opaque, reduces the brightness of LED seven segment digital tubes simultaneously, and this can play energy-conserving action, and its integral body can improve the security of Password Input again.
The accompanying drawing explanation
Fig. 1 be one key of the present invention vertical view;
Fig. 2 is that the A-A of Fig. 1 is to cross-sectional view;
Fig. 3 is control circuit block scheme of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, by specific embodiment, the present invention is described in further detail.It should be noted that, the present embodiment is descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of cipher anti theft random variation numeric keypad, comprise function button, digital keys and control circuit, the contour structures of two class buttons is identical with standard cipher input keyboard size, innovative point of the present invention is button and controls the improvement of single channel, so the present embodiment is only narrated the structure of button and the formation of control circuit.
Innovative point of the present invention is:
1, described button comprises keycap 2, charactron display 3, conductive rubber trigger 6, support set 1, support column 4, film touch panel 7 and circuit board 8, referring to Fig. 1,2, be fixedly mounted with the film touch panel on circuit board, be fixedly mounted with the conductive rubber trigger on the film touch panel, by support set, the support column guiding keycap that is slidably installed, on the film touch panel below the keycap middle part, be fixedly mounted with charactron on the conductive rubber trigger.Transmittance reduction, the complete opaque form of the brim of a hat around the keycap middle part of button is transparent, transparent; The charactron display adopts LED seven segment numerical tube display; between this charactron display and keycap, certain spacing distance is arranged; cause the password of charactron display to show can only to be human body in the situation that approach vertical direct-view could be in sight, so greatly improved the protective value of password.
At the uniform support set that is fixedly mounted with of the film touch panel of charactron display periphery, the support set shown in the present embodiment accompanying drawing is four, no matter in the time of can making like this user use, which place of keycap finger encounter, can realize the input function of password, the sensitivity that has improved single button; Bottom all coaxially is fixedly mounted with a conductive rubber trigger in each support set, the coaxial corresponding setting-in keycap of each support set internal upper part the be fixedly mounted with support column of going to the bottom, and support column and support set are for being slidably installed.For fear of keycap from dropping, the side in the support column lower end is shaped with a dogging 5, and this dogging is installed on the made hook groove of support set in the upper limit site of keycap.
2, the structure of described circuit board control circuit is referring to Fig. 3, comprise the 89C51 single-chip microcomputer, data latches, the charactron display, digital keys and function button, the 89C51 single-chip microcomputer utilizes its timer internal and the method for interrupting combination to produce random number, and read by interrupt function numerical value that timer produces in technical scope, use a plurality of combinations simultaneously, dynamically adjust each combination span, realize one one the bright bits per inch code of land wheel flow point tube display by data latches, the position choosing that is each charactron display is chosen in turn, a plurality of charactron displays share one group of Duan Xuan, section selects the data charactron display that only contraposition is chosen effective.The line of digital keys is connected with the corresponding I/O port of 89C51 single-chip microcomputer respectively with alignment, by the 89C51 single-chip microcomputer, takes the line scanning method to programme.When the user passes through the display device of cipher anti theft keyboard, watch the information of key mapping numeral, and find the corresponding password figure of each key mapping, and the 89C51 single-chip microcomputer carries out real time scan to each key mapping of digital keys, after confirming have digital keys to be pressed, the 89C51 single-chip microcomputer reads key assignments, and preserves key assignments; " confirmation " key of pressing afterwards function button completes the input of this password, the position distribution of the cryptographic random number above the charactron display regenerates, if mistake appears in Password Input, the user can realize the removing of password and re-enter by " cancellation " key in function button.When keyboard was not used in 5 minutes, system will be in holding state, and the Presentation Function of charactron display is closed, and, when the user need to input password, the charactron display function is opened.The output port of this device password adopts general now USB interface, only need be connected with external unit, after the equipment energising, can work use.
This keyboard has 12 buttons, a liquid crystal display, ten numerals that wherein 12 buttons are 0-9 change buttons and two function buttons, by the 89C51 single-chip microcomputer with data latches in conjunction with realizing that the key mapping corresponding to each charactron scanned, determine the numeral of inputting.The random number produced by the 89C51 single-chip microcomputer, make the each position random variation of 0-9 numeral shown on keyboard, waits for Password Input, and press the position that " confirmation " key can change ten random numbers again.
The random number that each 89C51 single-chip microcomputer produces is presented at above charactron by data latches and with the form of static scanning; Button adopts line to be connected with the single-chip microcomputer corresponding ports respectively with alignment, with the line scanning method, determines that the position that button is pressed realizes the input to respective digital, and demonstration " * " number on liquid crystal display and corresponding password receiver, realizes cryptoguard; After the input numeral, by after " confirmations " function button confirmation, by the 89C51 single-chip microcomputer, send password, the position distribution of the random number of all buttons will regenerate simultaneously, for next Password Input is prepared, i.e. and this EO.Liquid crystal display is the 1602LCD(blueness) liquid crystal display.
The 89C51 single-chip microcomputer is every display with bright ten LED seven segment digital tubes of one one land wheel flow point by data latches, the position choosing that is each LED seven segment digital tubes is chosen in turn, a plurality of LED seven segment digital tubes share one group of Duan Xuan, the section select data only contraposition select selected LED seven segment digital tubes effective.
Single led seven segment digital tubes is carried out downsizing and is enlarged edge and add that in outer rim keycap makes the overall appearance size the same with standard input button size; The edge surrounding that single led seven segment digital tubes enlarges respectively has four sensitive contacts, no matter four identical contacts of function are for keycap from which direction is pressed and can realizes the transmission of signal, thereby has improved the sensitivity of single button.
If keyboard was not used in 5 minutes, LED seven segment digital tubes and LCD(blueness) liquid crystal display brightness extinguishes fully, system is in holding state, numeral shows closes, and when the user need to input password, numeral demonstration, LED seven segment digital tubes and LCD(blueness) the liquid crystal display unlatching: the energy-conservation form design of whole employing.The keyboard body be connected with external unit adopts general now usb communication agreement, realizes the defeated soon fast of information, improves versatility and the market competitiveness of this product data transmission.
USB interface can realize plug and play, and the mobility of keyboard strengthens, and is user-friendly to.The transmission speed of data and computer improves, and has shortened the working time, has improved efficiency.
Principle of work of the present invention is:
This product is based on the antitheft keyboard of a kind of novel cipher of 89C51 chip microcontroller key mapping and digital dynamic demonstration, produce random number by single-chip microcomputer, make the each position random variation of 0-9 numeral that on keyboard, the LED seven segment digital tubes shows, single-chip microcomputer is scanned the corresponding key mapping of each charactron, determine the numeral of input, during use, first by USB connection data line, be connected to the computer USB port, realize that intelligent keyboard is connected and shows relevant information, complete operation with computer data.Keyboard was not used in 5 minutes, and system is in holding state, and numeral shows closes, and reaches energy-conservation requirement.
Formed by keyboard body and the USB interface that is arranged on keyboard body side, be divided into load module, control module, display module and output module.
Load module comprises digital keys " 0-9 " and function button " confirmation ", " cancellation " totally 12 buttons.Adopt matrix keyboard, can realize the input of numerical information, input information is complete presses " confirmation " key, and data just write control module.If " cancellation " pressed in input error, key just can be cancelled this input message, by control module, produces other one group of random digit, again input.
Control module is core of the present invention, by the 89C51 single-chip microcomputer, several modules is organically combined.Control module produces random digit by programmed instruction, delivers to data latches, then delivers to respectively each key mapping, and realizes the dynamic demonstration of random digit by display decoder; Each digital keys is connected with data latches simultaneously, and input message is delivered to control module by data latches, by data-switching, utilizes data line that input value is delivered to the Computer display window, is convenient to the user and observes input message.
Display module can be realized the dynamic demonstration of random digit, and control module, by order-driven LED charactron, completes demonstration.Do not receive the dormant state that input instruction meeting enters low-power consumption automatically in 5 minutes when keyboard, display module is closed, and restarts display module, energy-conserving and environment-protective next time while needing input.
Output module is responsible for communicating by letter of control module and computing machine.Just can be sent to computing machine by data line and USB interface input data, facilitate user's cross-check information.USB interface can realize plug and play simultaneously, has greatly improved the dirigibility of keyboard, has met the user and has used the demand of keyboard in different occasions, and improved the speed of data transmission, has saved the time.
Claims (7)
1. a cipher anti theft random variation numeric keypad, comprise function button, digital keys and control circuit, the contour structures of two class buttons is identical with standard cipher input keyboard size, it is characterized in that: described button comprises keycap, the charactron display, the conductive rubber trigger, support set, support column, film touch panel and circuit board, be fixedly mounted with the film touch panel on circuit board, be fixedly mounted with the conductive rubber trigger on the film touch panel, pass through support set on the conductive rubber trigger, the support column guiding keycap that is slidably installed, be fixedly mounted with charactron on film touch panel below the keycap middle part.
2. cipher anti theft random variation numeric keypad according to claim 1, it is characterized in that: be fixedly mounted with four support sets the film touch panel of charactron display periphery is uniform, in each support set, bottom all coaxially is fixedly mounted with a conductive rubber trigger, the coaxial corresponding setting-in keycap of each support set internal upper part the be fixedly mounted with support column of going to the bottom, support column and support set are for being slidably installed.
3. cipher anti theft random variation numeric keypad according to claim 1, is characterized in that: transmittance reduction, the complete opaque form of the brim of a hat around the keycap middle part of described button is transparent, transparent.
4. cipher anti theft random variation numeric keypad according to claim 2, it is characterized in that: the side in the support column lower end is shaped with a dogging 5, and this dogging is installed on the made hook groove of support set in the upper limit site of keycap.
5. cipher anti theft random variation numeric keypad according to claim 1, it is characterized in that: described circuit board control circuit comprises 89C51 single-chip microcomputer, data latches, charactron display, digital keys and function button, the random number produced by the 89C51 single-chip microcomputer, make the each position random variation of 0-9 numeral shown on keyboard, wait for Password Input, and press the position that " confirmation " button can change ten random numbers again.
6. cipher anti theft random variation numeric keypad according to claim 5 is characterized in that: the random number that each 89C51 single-chip microcomputer produces is presented at above charactron by data latches and with the form of static scanning; Button adopts line to be connected with the single-chip microcomputer corresponding ports respectively with alignment, determines position realization that button the is pressed input to respective digital with the line scanning method, and shows " * " number at liquid crystal display and corresponding password receiver simultaneously, realizes cryptoguard; After the input numeral, by after " confirmations " function button confirmation, by the 89C51 single-chip microcomputer, send password, the position distribution of the random number of all buttons will regenerate simultaneously, for next Password Input is prepared, i.e. and this EO.
7. according to the described cipher anti theft random variation of claim 5 or 6 numeric keypad, it is characterized in that: described 89C51 single-chip microcomputer is every display with bright ten LED seven segment digital tubes of one one land wheel flow point by data latches, the position choosing that is each LED seven segment digital tubes is chosen in turn, a plurality of LED seven segment digital tubes share one group of Duan Xuan, the section select data only contraposition select selected LED seven segment digital tubes effective.
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| CN2013103992076A CN103473517A (en) | 2013-09-05 | 2013-09-05 | Password-stealing-preventing random-variation numeric keypad |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103992076A CN103473517A (en) | 2013-09-05 | 2013-09-05 | Password-stealing-preventing random-variation numeric keypad |
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| CN103473517A true CN103473517A (en) | 2013-12-25 |
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| CN2013103992076A Pending CN103473517A (en) | 2013-09-05 | 2013-09-05 | Password-stealing-preventing random-variation numeric keypad |
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| CN106998207A (en) * | 2017-01-20 | 2017-08-01 | 艾体威尔电子技术(北京)有限公司 | A kind of scanning keying method applied to POS system |
| US10482462B1 (en) | 2016-03-18 | 2019-11-19 | Wells Fargo Bank, N.A. | Automatic teller machine game-based authentication functionality |
| CN110505057A (en) * | 2019-08-16 | 2019-11-26 | 华东师范大学 | A kind of digital circuit generating random cipher |
| CN110782581A (en) * | 2018-07-30 | 2020-02-11 | 珠海格力电器股份有限公司 | Cipher keyboard |
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| US10482462B1 (en) | 2016-03-18 | 2019-11-19 | Wells Fargo Bank, N.A. | Automatic teller machine game-based authentication functionality |
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| CN110505057B (en) * | 2019-08-16 | 2021-06-25 | 华东师范大学 | Digital circuit for generating random password |
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Application publication date: 20131225 |