CN1558377A

CN1558377A - Peep proof cipher keyboard

Info

Publication number: CN1558377A
Application number: CNA2004100218239A
Authority: CN
Inventors: 平刘; 刘平
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-12
Filing date: 2004-02-12
Publication date: 2004-12-29

Abstract

The peeking resisting cipher keyboard includes ten digit keys, confirming key, clearing key and keyboard control circuit as well as ten-digit display. The keyboard control circuit controls the display for randomly arranging display of ten digits while receiving returned keying signal and processing before transmitting to the system unit. Before each cipher typing, the cipher keyboard creates and displays one random number, based on which the user inputs the cipher for his account, and after depressing the confirming key, the typed code sequence is fed to the terminal. The cipher keyboard can prevent the peeker to obtain the cipher based on the typing order.

Description

The anti-code keypad of peeping

Technical field

The present invention relates to a kind of code keypad, particularly bank client and handle when withdrawing the money business, peep the anti-code keypad of peeping of clients' accounts password in order to prevent other people malice at bank counter.

Technical background

At present, when bank client is handled the deposit or the withdrawal to sales counter, each tame bank does not possess the function that prevents that other people from peeping for the keyboard of the input password that the client provides, cause the clients' accounts password often to be plagiarized by unprincipled fellow's malice, cause the account funds loss, and cause legal dispute, even bring bad social influence to bank.Although some code keypad has protective cover or other guard measure, can not effectively reach the anti-purpose of peeping eventually.

Code keypad that each bank uses for the client at present and common computor-keyboard are similar, just only comprise 0 to 90 digital keys and two modifier keys (" determining " and " removing " button) on the code keypad, its common feature is: 1, the positional alignment of the numeral on each key is fixed; 2, the numeral on each key is obvious.The person of peeping generally obtains the password that the client inputs by two kinds of methods: the one, by peeping the order of remembeing client's button, and know the clients' accounts password in proper order by inference by the stationary arrangement of keyboard; The 2nd, obtain password by peeping the numeral of directly remembeing client institute button.

The principle of work of existing password keyboard with main process generally is: code keypad links to each other with the banking computer terminal by the RS232 interface, the all corresponding fixing coding of each button on the keyboard (no matter being to generate or produce by software by hardware), this coding will be given the button data of computer system exactly.During beginning, terminal sends an initialize signal to code keypad, and this signal makes the code keypad internal circuit reset to original state, and sounding (as: " please input password ") prompting client, and the client begins to input password at this moment.This time by the coded data of key be temporarily to leave in the internal circuit of code keypad, the password end of input is by behind " affirmations " key, code keypad just the general just now the coded sequence of client institute button deliver to terminal, finish a password input operation.If the password of input does not conform to the actual conditions through system verification, the banking terminal operator can do corresponding operating, or the operation of cancellation input password, or transmits a signal to code keypad once more, restarts password input next time.

Summary of the invention

The purpose of this invention is to provide and a kind ofly anti-peep code keypad, the button when making the malice person of peeping input password according to the depositor is inferred the bank account password that obtains the depositor in proper order.

The anti-code keypad of peeping of the present invention, comprise 0～90 digital keys and " determining ", " removing " button and keyboard control circuit, also comprise corresponding with the described digital keys digital indicator of forming by ten digital display units, described keyboard control circuit is controlled this digital indicator and is carried out 0～90 digital random alignment demonstration, and receive the push button signalling of passing back, transfer to host computer system after treatment.

Each digital display unit by parallel data end Q0～Q7 of a shift register IC1～IC10 and a charactron IR1～IR10 a～the h pin is corresponding is formed by connecting, and the Q7 pin of the shift register IC1～IC9 of preceding nine digital display units is connected with B with the serial data input end A of next shift register successively; Keyboard control circuit is formed 4 * 3 key-press matrixs by P10, P11, P12, the P13 pin of P00, P01, P02 pin and the parallel data port P1 of the parallel data port P0 of single-chip microcomputer IC11; 21 (P20) of single-chip microcomputer IC11 are connected with 9 (R2OUT) pin with 10 (T2IN) of the conversion chip IC12 of RS232 interface with the TTC level respectively with 22 (P21) pin, and 7 (T2OUT) of IC12,8 (R2IN) and 15 (GND) pin are formed by connecting with 2 (RX), 3 (TX) and 5 (GND) pin of RS232 interface respectively; 10 (P30) pin of single-chip microcomputer IC11 is connected with B with the serial data input end A of the shift register of first digit display unit, and 11 (P31) pin is connected with the clock pin CLK of the shift register IC1～IC10 of each digital display unit as the clock pin.

Indentation in the middle of the projection to reduce person of peeping's visual angle, makes the person of peeping can not directly see the numeral that shows on the button in side direction around each digital keys.

0 of this keyboard～90 digital keys is made by transparent material, adopts digital display unit (charactron or other digital display element devices) to show its button numerical value in its lower section, the depositor can be known see the numeral that ten digital display units show.Keyboard control circuit and wherein software are realized two functions: the one, input each time before the password, and generate automatically and show one group of array at random; The 2nd, according to current arrangement and depositor's button generation keyboard-coding.The coding of each button is no longer as the fixing inconvenience of conventional keyboard, but digital corresponding with each demonstration, the client delivers to terminal with the coded sequence of button after pressing " affirmation " key.

Code keypad of the present invention is owing to be to show its key number with digital display unit, and keyboard control circuit makes the numeral of this digital display unit demonstration before inputing password each time, all can generate and show the numeral of one group of random alignment automatically, thereby make unfixing the putting in order of numerical key on the keyboard, the depositor is the account password of the numeral input oneself that demonstrates according to each button on the keyboard, so the button the when person of peeping can't input password according to the depositor is inferred the bank account password that obtains the depositor in proper order; And indentation in the middle of the projection all around of each digital keys on the keyboard; the numeral that digital display unit is shown is positioned at button shrinkage pool bottom; reduced person of peeping's visual angle largely; the person of peeping can not directly see the numeral that shows on the button in side direction; thereby the code keypad that makes this kind structure has the fabulous anti-function of peeping; protect depositor's fund security effectively, and helped normally carrying out of bank's work.

Description of drawings

Now in conjunction with the accompanying drawings the present invention is described in further detail.

Fig. 1 is the anti-circuit theory diagrams of peeping digital display unit and connected keyboard control circuit in the code keypad of the present invention;

Fig. 2 is the front view of the numerical value button of this keyboard;

Fig. 3 is the vertical view of Fig. 2.

Embodiment

As Fig. 1, Fig. 2 and shown in Figure 3, should anti-peep the keyboard control circuit that code keypad comprises 0～90 digital keys and " determining ", " removing " button and keyboard, digital keys is made by transparent material, and indentation in the middle of the projection all around of each digital keys.In keyboard, also comprise corresponding with the described digital keys digital indicator of forming by ten charactrons, each digital display unit by a model be 74LS164 shift register IC1～IC10 parallel data end Q0～Q7 and a charactron IR1～IR10 a～the h pin is corresponding is formed by connecting, and the Q7 pin of the shift register IC1～IC9 of preceding nine digital display units is connected with B with the serial data input end A of next shift register successively; Described keyboard control circuit is that P10, P11, P12, the P13 pin of P00, P01, P02 pin and parallel data port P1 of parallel data port P0 of the single-chip microcomputer IC11 of 89C51 formed 4 * 3 key-press matrixs by model, and with keyboard on ten digital keys and " determining ", " removing " button corresponding one by one; 21 (P20) of single-chip microcomputer IC11 and 22 (P21) pin are that the TTC level of MAX232 is connected with 9 (R2OUT) pin with 10 (T2IN) of the conversion chip IC12 of RS232 interface with model respectively, and 7 (T2OUT) of IC12,8 (R2IN) and 15 (GND) pin are formed by connecting with 2 (RX), 3 (TX) and 5 (GND) pin of RS232 interface respectively; 10 (P30) pin of single-chip microcomputer IC11 is connected with B with the serial data input end A of the shift register of first digit display unit, and 11 (P31) pin is connected with the clock pin CLK of the shift register IC1～IC10 of each digital display unit as the clock pin.This control circuit control figure display carries out 0～90 digital random alignment and shows, and receives the push button signalling of passing back, transfers to host computer system after treatment.

Should anti-peep code keypad is below the button of traditional code keypad, adopts digital display unit to show its key value, rather than resembles existing keyboard and so regularly numeral is printed on the button.Key button on the display unit adopts transparent material, so that the display digit under it can be seen clearly.Control circuit and wherein software are realized two functions, the one, input each time before the password, and generate automatically and show one group of array at random; The 2nd, according to current arrangement and client's button generation keyboard-coding.The fixing no longer like before inconvenience of the coding of each key, but digital corresponding with each demonstration.The client delivers to terminal by behind " affirmation " key with the coded sequence of button.

Claims

1, a kind of anti-code keypad of peeping, comprise 0～90 digital keys and " determining ", " removing " button and keyboard control circuit, it is characterized in that: also comprise corresponding with the described digital keys digital indicator of forming by ten digital display units, described keyboard control circuit is controlled this digital indicator and is carried out 0～90 digital random alignment demonstration, and receive the push button signalling of passing back, transfer to host computer system after treatment.

2, the anti-code keypad of peeping according to claim 1, it is characterized in that: each digital display unit by parallel data end Q0～Q7 of a shift register IC1～IC10 and a charactron IR1～IR10 a～the h pin is corresponding is formed by connecting, and the Q7 pin of the shift register IC1～IC9 of preceding nine digital display units is connected with B with the serial data input end A of next shift register successively; Keyboard control circuit is formed 4 * 3 key-press matrixs by P10, P11, P12, the P13 pin of P00, P01, P02 pin and the parallel data port P1 of the parallel data port P0 of single-chip microcomputer IC11; 21 (P20) of single-chip microcomputer IC11 are connected with 9 (R2OUT) pin with 10 (T2IN) of the conversion chip IC12 of RS232 interface with the TTC level respectively with 22 (P21) pin, and 7 (T2OUT) of IC12,8 (R2IN) and 15 (GND) pin are formed by connecting with 2 (RX), 3 (TX) and 5 (GND) pin of RS232 interface respectively; 10 (P30) pin of single-chip microcomputer IC11 is connected with B with the serial data input end A of the shift register of first digit display unit, and 11 (P31) pin is connected with the clock pin CLK of the shift register IC1～IC10 of each digital display unit as the clock pin.

3, according to claim 1 and 2ly anti-peep code keypad, it is characterized in that: indentation in the middle of the projection around each digital keys.