CN101021756A

CN101021756A - Dynamic displaying cipher keboard

Info

Publication number: CN101021756A
Application number: CNA2007100734471A
Authority: CN
Inventors: 郭文; 谭文
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-05
Filing date: 2007-03-05
Publication date: 2007-08-22

Abstract

This invention discloses an encryption keyboard with dynamic display including the keyboard body linking the external device with many numbers and function keys, in which, the key value display driver circuit linking with CPU and processing dynamic definition and identification on the number keys is set. The number keys are set with display units to dynamically display number key values respectively, and the units connect the keys display driver circuits. The CPU is a SCM, and the driver circuit includes data flip-latch and display encoder. The invention uses the light digital tube to make every bit show a figure, and show different one after each restoration, thus effectively preventing stealing passwords by guessing from button positions.

Description

Dynamic displaying cipher keboard

Technical field

The present invention relates to a kind of cipher inputting keyboard, the changed randomly dynamic displaying cipher keboard of particularly a kind of key assignments.

Background technology:

Along with informationization and development of high-tech, keyboard has become one of most important computer external input equipment, it not only can finish normal literal input, and as a kind of cipher input, be widely used in fields of society, as: financial fields such as bank, stock market.Yet, as cipher input, the confidentiality of existing keyboard is relatively poor, its main cause is that the key assignments of each key position of keyboard fixes, the user is when the input password, and some prepared observers can analyze the password or the data of user's input to the operation of each key position on the keyboard by the observation user.Therefore, the stolen case of user's password is of common occurrence.Existing keyboard still can not change this situation by adding protective cover.Simultaneously, because the special circumstances of China, when having the intensive occasion of bank, market or other personnel to carry out the password input, be difficult to guarantee effective secret distance, user's the right of privacy and property are subjected to great threat, impel quite a few people to be unwilling to use these class methods to conclude the business, influenced normal financial order greatly.Therefore, study a kind of method for designing of new-type keyboard,, guarantee normal financial transaction, crucial social benefit and economic benefit are arranged to prevent financial crime.

Summary of the invention

The objective of the invention is problem at above-mentioned existence, provide a kind of can be as required, the digital key assignments of random variation keyboard and putting in order with the dynamic displaying cipher keboard of the security performance that reliably and effectively improves keyboard input, to prevent that other people from taking to spy at a distance or use other instrument, by the password that importer's actuation of keys and Position Approximate are judged input.

For solving the problems of the technologies described above, the present invention has adopted following technical scheme: design a kind of dynamic displaying cipher keboard, comprise the keyboard body that links to each other with external unit, have a plurality of digital keys and function button on this keyboard body, be provided with the key assignments display driver circuit that links to each other and each digital keys is carried out Dynamic Definition and identification with central processing unit in the described keyboard body, but be respectively equipped with the display unit of dynamic change display digit key assignments on described a plurality of digital keys, each display unit is connected to described key assignments display driver circuit respectively.

Described central processing unit is a single-chip microcomputer, and described key assignments display driver circuit comprises data latches and display decoder; Single-chip microcomputer links to each other with data latches and function button respectively, and each digital keys links to each other with data latches respectively, and the display unit on each digital keys then links to each other with display decoder; Digital key assignments on the digital keys by described single-chip microcomputer according to the cryptographic algorithm dynamic assignment, this dynamic allocation procedure is the ordering that is generated password figure by single-chip microcomputer according to password program automatically, at first deliver to data latches, and then deliver to each digital keys respectively, show on the display unit on each digital keys by display decoder that simultaneously shown numeral promptly is the key assignments of current this digital keys.

The user carries out password input according to the numeral on the current digital keys, whenever by next key, and all can be automatically and the position of the digital demonstration of stochastic transformation; Single-chip microcomputer is judged the position of the key that is pressed by each button on the real time scan keyboard body, thereby determines the current numeral of importing; After input digit finishes, by confirming the function button affirmation and sending password by single-chip microcomputer; After all operations is finished, finish this operation by the end functions button, single-chip microcomputer is shown as 0 with all numerals on the digital keys automatically behind the input instruction that obtains the end functions button.

Be respectively equipped with the spy magnifier on each digital keys on the described keyboard body, its visible angle is less than 15 degree, and described digital keys is the circle that diameter is no more than 8mm.

The display unit of display digit key assignments is preferably the LED charactron on the described digital keys.

Described keyboard also is provided with and is used to the hummer that guarantees that each button operation puts in place, and this hummer links to each other with central processing unit.

Dynamic displaying cipher keboard of the present invention is taked key place value method at random, utilize light-emitting nixie tube to make each key position can show a numeral, but after resetting at every turn, each shown numeral is all inequality, so just effectively prevented to infer that by the button position situation of coming stealing passwords takes place, more effective guarantee user's rights and interests.

Description of drawings

Fig. 1 is a circuit catenation principle synoptic diagram of the present invention;

Fig. 2 is the sectional structure synoptic diagram of digital keys.

Fig. 3 is a principle of work synoptic diagram of the present invention.

Embodiment

As Fig. 1, dynamic displaying cipher keboard of the present invention profile and button be provided with aspect with existing cipher inputting keyboard be essentially identical, comprise the keyboard body 1 that links to each other with external unit, have a plurality of digital keys 2 and function buttons of arranging by matrix-style 3 on this keyboard body 1, function button comprises initiating key, acknowledgement key and cancel key etc.

Different is, also be provided with in the described keyboard body 1 and comprise the key assignments display driver circuit of forming by data latches 4 and display decoder 5, be used for each digital keys 2 is carried out Dynamic Definition and identification, the key assignments display driver circuit links to each other with 8051 type single-

chip microcomputers

6, and 6 of this single-chip microcomputers link to each other with power supply; But be respectively equipped with the LED charactron display unit 21 of dynamic change display digit key assignments on each digital keys 2, each display unit 21 is connected to display decoder 5 respectively.During the keyboard no power, there is not numeral on ten digital keys 2; Only when keyboard was worked, the LED charactron display unit 21 on the digital keys got electric, under the control of key assignments display driver circuit, demonstrates 0～90 numeral at random on ten digital keys.In addition, this keyboard also is provided with hummer, and its effect is to produce prompt tone, to guarantee putting in place of each button operation.

8051 type single-chip microcomputers 6 link to each other with data latches 4 and function button 3 respectively as central processing unit, control all actions.Digital key assignments on the digital keys 2 by described single-chip microcomputer 6 according to the cryptographic algorithm dynamic assignment, this dynamic allocation procedure comprises by single-chip microcomputer 6 according to the password program ordering of 10 password figures of generation 0 to 9 automatically, at first deliver to data latches 4, and then deliver to each digital keys 2 respectively, on the LED charactron display unit 21 on each digital keys 2, show that shown numeral promptly is a current key value by display decoder 5 simultaneously.The user carries out the password input according to the numeral that shows on the current digital keys 2, whenever by next key, and all can be automatically and the position of the digital demonstration of stochastic transformation.After input digit finishes, press acknowledgement key and confirm.Single-chip microcomputer 6 is judged the position of the key that is pressed by each button on the real time scan keyboard body, thereby determines the current numeral of importing.After all operations was finished, the user was by end functions bond Shu Benci operation, and single-chip microcomputer 6 is shown as 0 with all numerals on the digital keys 2 automatically behind the input instruction that obtains the end functions key.

Be respectively equipped with spy magnifier 22 on each digital keys 2 on the keyboard body 1 as described in Figure 2, this spy magnifier 22 is installed between the transparent push panel 23 and LED charactron display unit 21 on digital keys 2 surfaces, and its visible angle is less than 15 degree.In the present embodiment, digital keys is the circle that diameter is no more than 8mm, and by people's eye distance button 0.5m calculating, visual range is the circle of a diameter 0.13m.And people's two eye distances are from about about 0.10m, and under the situation that a people faces, another person will see the numeral that button is shown, just must be close to face, and in fact this is impossible take place.

With reference to Fig. 1 and 3, principle of work of the present invention is described as follows: single-chip microcomputer real time scan keyboard, judge whether initiating key is pressed, if this key is pressed, data latches 4 auto-initiations then, single-chip microcomputer 6 is delivered to data latches 4 with the Serial No. that generates, and distribute to each digital keys and display unit thereof successively by data latches 4, after certain digital keys is pressed, send its current key value back to the single-chip microcomputer storage unit, whenever by next number word button, all can be automatically and the position of the digital demonstration of stochastic transformation.If input error midway can with the zero clearing of password storage unit, be re-entered correct password by cancel key.After importing six bit digital and finishing, press acknowledgement key and confirm, by the single-chip microcomputer output password.After each the operation, press end key, shown all zero clearings of numeral on the keyboard, the operation beginning shows new numeral again to wait for next time, and the position of digital demonstration changes.If there is not key to be pressed, central processing unit is proceeded scanning, wait for certain hour after, shown digital automatic clear on the keyboard.Using method is very simple, only needs to be connected with external unit (as computing machine), gets final product operate as normal after powering on.

Above-described only is preferred implementation of the present invention, should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from inventive concept of the present invention, can also make some distortion and improvement, and these all belong to protection scope of the present invention.

Claims

1, a kind of dynamic displaying cipher keboard, comprise the keyboard body that links to each other with external unit, have a plurality of digital keys and function button on this keyboard body, it is characterized in that, be provided with the key assignments display driver circuit that links to each other and each digital keys is carried out Dynamic Definition and identification with central processing unit in the described keyboard body, but be respectively equipped with the display unit of dynamic change display digit key assignments on described a plurality of digital keys, each display unit is connected to described key assignments display driver circuit respectively.

2, dynamic displaying cipher keboard according to claim 1 is characterized in that, described central processing unit is a single-chip microcomputer, and described key assignments display driver circuit comprises data latches and display decoder; Single-chip microcomputer links to each other with data latches and function button respectively, and each digital keys links to each other with data latches respectively, and the display unit on each digital keys then links to each other with display decoder; Digital key assignments on the digital keys by described single-chip microcomputer according to the cryptographic algorithm dynamic assignment, this dynamic allocation procedure is the ordering that is generated password figure by single-chip microcomputer according to password program automatically, at first deliver to data latches, and then deliver to each digital keys respectively, show on the display unit on each digital keys by display decoder that simultaneously shown numeral promptly is the key assignments of current this digital keys.

3, dynamic displaying cipher keboard according to claim 2 is characterized in that, the user carries out password input according to the numeral on the current digital keys, whenever by next key, and all can be automatically and the position of the digital demonstration of stochastic transformation; Single-chip microcomputer is judged the position of the key that is pressed by each button on the real time scan keyboard body, thereby determines the current numeral of importing; After input digit finishes, by confirming the function button affirmation and sending password by single-chip microcomputer; After all operations is finished, finish this operation by the end functions button, single-chip microcomputer is shown as 0 with all numerals on the digital keys automatically behind the input instruction that obtains the end functions button.

4, according to the arbitrary described dynamic displaying cipher keboard of claim 1 to 3, it is characterized in that, be respectively equipped with the spy magnifier on each digital keys on the described keyboard body, its visible angle is less than 15 degree.

5, dynamic displaying cipher keboard according to claim 4 is characterized in that, described digital keys is the circle that diameter is no more than 8mm.

According to the arbitrary described dynamic displaying cipher keboard of claim 1 to 3, it is characterized in that 6, the display unit of display digit key assignments is the LED charactron on the described digital keys.

According to the arbitrary described dynamic displaying cipher keboard of claim 1 to 3, it is characterized in that 7, this keyboard is provided with and is used to the hummer that guarantees that each button operation puts in place, this hummer links to each other with central processing unit.