CN1267011A

CN1267011A - Non-character cipher input device

Info

Publication number: CN1267011A
Application number: CN 00112182
Authority: CN
Inventors: 李亚林; 李小奇
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-30
Filing date: 2000-03-30
Publication date: 2000-09-20

Abstract

A non-character cipher input device connected to computer is composed of keys, circuit board and IC chips connected to keys. Its advantages are no character marker on surface of key, its character display correspondent with keys and connected to IC chip, and high security. It is suitable for bank to input cipher.

Description

Non-character cipher input device

The invention belongs to computer peripheral, relate to a kind of non-character cipher input device.

Using a computer often needs the input password, except that with the computer keyboard input, also has a kind of PIN PAD in the peripherals, and for example the PIN PAD that is provided with in the terminal of the computer system of bank is commonly called as keypad.Button is arranged above it, the circuit connection is arranged below the fixing character (number) of represent of each button, button, input unit is connected with computing machine by lead.Do not comprise coding chip in the circuit of part keyboard, encode by the chip in the machine behind each push button signalling input computing machine; And include coding chip in the circuit of another part keyboard, input computing machine after the signal of button is encoded in keyboard.PIN PAD is placed on the information desk, and when the client came transacting business, the staff can send instruction " please input password! ", the client keys in the bank cipher that is about to oneself.At present, this PIN PAD all indicate clear and definite digital character by strong, it is also fixed by strong position, though set up the one-meter line before the bank service sales counter, but when the client carried out the password input, as long as the bystander was by just being easy to judge the password that is transfused to by strong action.In fact, criminal steals depositor's bank cipher in this way, and the case of stealing deposit has more taken place a lot of.In the bank hall and under the open prompting at bank clerk, the client has been leaked the bank cipher of oneself, and bank also has a responsibility for; The privacy of bank client (bank cipher) is forced under the explicit situation to be used, and also can cause psychological pressure.In a word, the PIN PAD security performance of fixed character button is relatively poor, the scheme that does not also address this problem in the prior art.

The purpose of this invention is to provide the good PIN PAD of a kind of security performance, should there be character mark on the keyboard of this input unit, each button is unfixing with digital corresponding relation, make others judge password, make PIN PAD really play secret effect by input people's actuation of keys.

Task of the present invention is finished as follows: non-character cipher input device, it each is by not having fixed relationship between the numeral of being good for and being imported, what import during button of pressing is that what number is determined by software, and every input once just changes once, so be not to indicate character regularly on its button, but establish alphanumeric display in addition, dynamically show each button character of representative at that time.This technical scheme showing as structurally: a kind of non-character cipher input device, be provided with button, be provided with circuit below the button, be provided with integrated circuit (IC) chip in the circuit, each button is connected with chip, input unit is connected with computing machine, it is characterized in that: character mark is not set on the button, and simultaneously, PIN PAD is provided with alphanumeric display, alphanumeric display is connected with chip, and corresponding with each NULI character button.Said integrated circuit (IC) chip can be that single-chip microcomputer also can be other coding chip; Can be the chip of establishing in the PIN PAD, also can be the coding chip of establishing in the computing machine (or part of other functional chips of computing machine).Said alphanumeric display can be charactron, LED, LCD or LCD; Alphanumeric display can be arranged with the keyboard branch of PIN PAD (under the prerequisite that does not influence with NULI character button one-to-one relationship), also can be directly arranged on the button (for example to be arranged in the transparent key body).The continuous conversion of the character of each button representative, its mode can be stochastic transformations; It also can be algorithm variation by prior setting.Prioritization scheme of the present invention is: alphanumeric display is provided with trap type shading hurdle or light shield.Shading hurdle or light shield only allow to recognize from the top reads display, and shelters from the sight line of side.Further prioritization scheme is: when alphanumeric display and NULI character button branch were arranged, the periphery of each button was provided with protruding posting.The key that the operator will press with the sense of touch affirmation by posting when further improving security performance, can prevent to press the key in next door by mistake.When alphanumeric display and NULI character button were arranged to one, shading hurdle or light shield just played the effect of posting simultaneously.The function and the running program of the technical program are as follows:

1, there is not unlatching " please input password at bank clerk! " instruction when knowing, the alphanumeric display on the PIN PAD does not have any demonstration, and does not have identifier on the button, old friends can't determine the implication of each button.

2, open when bank clerk and " please input password! " instruction when knowing, alphanumeric display demonstrates character or other identifier, as " 1 " " 2 " .... " 9 " " 0 " or " affirmation " etc.At this moment, the implication of each button has just been determined.

3, the client is according to the prompting of display, and the pressing button is totally lost behind the password, presses " affirmation " key again, and at this moment alphanumeric display cuts out, and this PIN PAD is returned to 1 state again.

From as can be seen above, the implication of the button of this PIN PAD is to derive from the shown character of alphanumeric display, and the existing ripe singlechip technology of use can have multiple circuit design to reach the input of the NULI character button of random arrangement demonstration of alphanumeric display character code and correspondence.

The present invention is at the interface that does not change the external PIN PAD of bank computer system terminal (keypad) and do not change under the condition of the existing service environment of bank, makes the maintaining complete secrecy of input of customer bank password, the anxiety that nothing is divulged a secret.This programme also is applicable to the various cipher input equipments that other has security requirements.

The invention will be further described below in conjunction with accompanying drawing:

Accompanying drawing 1 is the structural representation of the embodiment 1 of PIN PAD.

Accompanying drawing 2 is structural representations of the embodiment 2 of PIN PAD.

Accompanying drawing 3 is the structural representations along Figure 1A-A section.

Accompanying drawing 4 is the structural representations along Figure 1B-B section.

Accompanying drawing 5 is electrical schematic diagrams of PIN PAD.

Embodiment 1, with reference to Fig. 1: the upper surface in PIN PAD 3 is provided with strip alphanumeric display 1, and it is the LCD of ten character bits, can demonstrate " 0 " to " 9 " digit on each character bit, if this LCD design has light, this is in that recognize can be more clear when reading; Corresponding with LCD1 is NULI character button 4, and it is consistent with the figure place of the digit of LCD, and NULI character button 4 also is ten; There is not character on the button, the digit that the input implication of its each button comes self-corresponding LCD1 to show; With existing ripe single chip circuit, can be implemented in the various arrangements of ten digits of LCD1 easily, each NULI character button 4 also can be imported different digital signals along with the digit of conversion like this.Except NULI character button 4, also can be provided with identifier button 5, they represent " confirming (Enter) " and " removing (Clean) " respectively, lead 2 connects the circuit of PIN PAD 3 with computing machine.Fig. 3 is the cross-sectional view of doing along Figure 1A-A, and the upper surface of PIN PAD 3 has alphanumeric display 1, and the display surface of alphanumeric display 1 is provided with " trap type " shading hurdle 6 or light shield 7.Shading hurdle 6 or light shield 7 have certain height, are empty above the shading hurdle 6, are the face of the sealing of printing opacity above the light shield 7; Their effect is to make can know from the sight line 8 of top and to recognize the character of reading on the LCD1, but sight line from the side is blocked, the confidentiality in the time of can improving password and import.

With reference to Fig. 4, it is the cross-sectional view of doing along Figure 1B-B, because ten character bit positions of the alphanumeric display LCD of PIN PAD 3 are compact, therefore corresponding with it NULI character button 4 is also compact, in order to prevent that certain button mistiming is pressed the button on next door under pressing, the posting 8 of NULI character button 4 peripheries is designed to convex, can prevents from effectively to press by mistake.

Embodiment 2, with reference to Fig. 2: it be the external PIN PAD of bank computer system structural representation.The upper surface of PIN PAD 3 has alphanumeric display 1, it is made of charactron, utilizing each charactron is the characteristics of single upright element, NULI character button 4 and single charactron display 1 are formed integrative-structure, be that the on-off circuit of NULI character button 4 and the alphanumeric display circuit coordination design of charactron 1 are in the same place, after charactron is lighted, also just confirmed the implication of button 4; Button shown in the figure amounts to 12, except that " 0 " to " 9 ", still have two buttons 5 expression " to confirm (Enter) " and " removing (Clean) ", they have display and do not have display all right, because to the input meaning of cryptosecurity, its effect is little.

Fig. 5 is a kind of electric principle schematic of PIN PAD, it is a body design with single-chip microcomputer 8051,27,28,10 parallel port of 32-40 pin are a-j NULI character buttons, 25,26 pin are Enter, Clean button, 1-4 parallel port and T0, T1 pin transmission binary code are to lcd driver IC9, selecting for use of it will be decided on the area and the electrical property feature of LCD10 alphanumeric display, the lead 2 that is connected with computing machine comprises circuits such as power supply, serial are exported, resetted, interrupt control, pin 18,19 external quartz crystal and trimmers.Single-chip microcomputer 8051 relies on the program software operation, prompting for of its software: the binary code word of " 0 " to " 9 " and the algorithm of its permutations write ROM and RAM, and the addressing of 10 a-j mouth lines (NULI character button) requires the addressing corresponding to ten character display positions of LCD.

Claims

1, a kind of non-character cipher input device, be provided with button, be provided with circuit below the button, be provided with integrated circuit (IC) chip in the circuit, each button is connected with chip, input unit is connected with computing machine, it is characterized in that: character mark is not set on the button, and simultaneously, PIN PAD is provided with alphanumeric display, alphanumeric display is connected with chip, and corresponding with each NULI character button.

2, according to the described non-character cipher input device of claim 1, it is characterized in that: alphanumeric display is provided with trap type shading hurdle or light shield.

3, according to claim 1 or 2 described non-character cipher input devices, it is characterized in that: the periphery of each NULI character button is provided with the posting of projection.