CN2215128Y

CN2215128Y - False-preventing cheque checking machine

Info

Publication number: CN2215128Y
Application number: CN94223993U
Authority: CN
Inventors: 李乐人; 姚天宏; 温立新
Original assignee: BEIJING SPACE GOLD-CARD ELECTRONIC ENGINEERING Co
Current assignee: BEIJING SPACE GOLD-CARD ELECTRONIC ENGINEERING Co
Priority date: 1994-11-09
Filing date: 1994-11-09
Publication date: 1995-12-13
Anticipated expiration: 2004-11-09

Abstract

The utility model relates to a false-preventing cheque checking machine, comprising a main processor 1, a printer 3, a keyboard 2, a display 4, a clock circuit 5, an IC card reading and writing device 6, and an intelligent IC card 7. The main processor is connected with the keyboard, the display, and the clock circuit via interface circuits, the main processor is connected with the printer via a PS232 serial communication interface circuit, and the main processor is connected with the IC card via the IC card reading and writing device. The utility model adopts the intelligent IC card, and therefore, the safety is high.

Description

False-preventing cheque checking machine

The utility model relates to a kind of check anti-counterfeit identifying machine.

Treasury trade between each enterprises and institutions adopts check mostly at present, check exists many disadvantages as traditional account transfer means, because the loss of check, stolen or forgery, cause enormous economic loss to country every year, therefore seriously upset normal financial order, withholding, pay out in the process of check check has been carried out strictly the truth identification particular importance that seems.At check anti-counterfeit identifying problem, occurred the anti-counterfeit identifying machine at present, but the encryption of this machine is simple, poor stability can not effectively false proof and knowledge puppet.

It is a kind of safe that the purpose of this utility model is to provide, and can carry out check anti-counterfeit identifying machine false proof and that knowledge is pseudo-to check effectively.

The utility model comprises primary processor, printer, keyboard, display, clock circuit, IC-card read write line and intellective IC card, primary processor joins by interface and keyboard, display and clock circuit, join through RS232 serial communication interface and printer, join through IC-card read write line and IC-card.Its principle of work is: at first provide IC-card by bank to each check applying unit.IC-card claims smart card again, and the chip on the card is equivalent to a micro computer, built-in CPU, storer and wafer operating system COS, and the Information Access of outer bound pair IC-card memory block is to carry out strict control and authentication by COS.Record the password of enterprise identity authentication codes and unit IC-card sheet on the IC-card, the password of each check applying unit is inequality, when the check applying unit will be bought check, holding legal IC-card buys to the bank of deposit, the bank of deposit carries out just selling check after the authentication to the ticket-buyer by IC-card, simultaneously in the start-stop serial number of the check record IC-card, the personnel that make out an invoice insert correct IC-card in the IC-card read write line when unit, and by behind the own correct password of keyboard input, could start the anti-counterfeit identifying machine, before carrying out false proof making out an invoice, IC-card and primary processor do earlier to confirm mutually, has only and confirm the processing of can making out an invoice after correct.When making out an invoice, the drawer only needs by keyboard input check limit, its remainder on the check was input in the primary processor by clock circuit as the date of making out an invoice, the check serial number is provided by IC-card, primary processor through cryptographic calculation, produces a string electronic data password with these significant datas, by printer prints on check, the drawer also can directly be handwritten on the check without printer; When holder of the check and sales department conclude the business, the shop-assistant at first inquires holder of the check's personal identification number, and the electronic data password on check is input in the check anti-counterfeit identifying machine by keyboard, primary processor passes through decipherment algorithm, the check original text is recovered out, and be presented on the display.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is a theory diagram of the present utility model;

Fig. 2 for of the present utility model be electrical schematic diagram.

Referring to accompanying drawing 1, present embodiment is made up of primary processor 1, keyboard 2, printer 3, LCD 4, clock circuit 5, IC-card read write line 6 and IC-card 7, keyboard 2, LCD 4 and clock circuit 5 join by interface circuit and primary processor 1 respectively, printer 3 joins by RS232 serial interface circuit and primary processor 1, and IC-card 7 joins through IC-card read write line 6 and primary processor 1.

Referring to accompanying drawing 2, main 1 employing, 8752 chips of handling, it links by T1 transmission mouth and the R1 receiving port of its serial connection communication interface RXD, TXD pin and communication chip ILC232, ILC232 sends mouth by R1 receiving port and T1 and links through socket J2 and outside printer 3, thereby constitutes the Check Printing interface circuit.Keyboard interface circuit is by U7:A, the U7:B of 8752 pin P2.0-P2.4, P1.3-P1.7, rp-drive 74LS05, U7:C, U7:D, pull-up resistor R10, form with U8:C and the socket J7 of non-74LS00, P2.0-P2.4 produces sweep signal through phase inverter 74LS05 and 74LS00, output to keyboard 2 through J7, simultaneously through J7 by the P1.3-P1.7 keyboard scan value of reading back.8752 P0 mouth and P2.5, the P2.6 of P2 mouth, P2.7 link by socket J4 and LCD 4, and wherein the P0 mouth is numeral/address multiplex, and P2.5, P2.6, P2.7 are control ends.8752 pass through its pin one 6 and 17 links to each other with SCL, the SDA of clock chip 8583, thereby constitutes clock circuit, and another function of clock chip is a black box function, promptly the machine card is confirmed that code and password are stored in the internal RAM.

The IC-card read/write circuit comprises clock oscillation circuit, power supply programming Control circuit and drives clamped holding circuit; the output of clock oscillation circuit is received on the clock control line of IC-card through driving clamped holding circuit; the main pin output of handling 1 port is received on the power control line of IC-card through power supply programming Control circuit, and another pin of primary processor port is received on the control line that resets of IC-card through driving clamped holding circuit.Clock oscillation circuit is made up of U8:A, the U8:B of quartz crystal 3.579MHz, Sheffer stroke gate 74LS00 and resistance R 6, R7; power supply programming Control circuit is made up of light lotus root TIL113, NPN triode T1, regulator block MC7805T; driving clamped holding circuit is made up of U7:E, the U7:F of diode DI1, DI3, DI5, DI6, DI8, DI10,74LS05 and resistance R 1, R9; 6 pin of IC-card gang socket J6 are received in the vibration output of the U8:B6 pin in the clock oscillation circuit after the anti-phase driving of the U7:F of 74LS05, on the instant clock control line.The P1.0 pin of 8752 P1 mouth is received on 2 pin of TIL113, when 8752 control IC-cards power on, it is low putting its P1.2 pin, making the CE conducting of TIL113, is high level thereby make CVCC, opens triode T1 like this, make T1 emitter generation+12V power supply, output+5V power supply VCC1 after the MC7805T voltage stabilizing is to 10 pin of J1 socket, promptly on the power control line.The P1.0 pin output of 8752 P1 mouth is received after the U7:E of 74LS05 is anti-phase on the reset line of IC-card, i.e. 8 pin of J1.8752 P1.1 pin links to each other with IC-card through 5 pin of J1, and 1,2 pin of J1 are the IC-card detection that puts in place, and 8752 are connected with 1 pin of J1 by the P3.3 pin, detect the signal that puts in place.Triode T2 is as driving buzzer warning usefulness, and J5 is the hummer socket, and primary processor 872 is realized buzzer warning control by pin one 5, so that inform that input information is wrong.J6 is the power light socket, and J3 is supply socket.

After this machine powers on, main process chip 8752 electrification resets, and initialization data liquor charging crystal display, 8752 set P2.5, P2.6, P2.7, send P0 mouth corresponding initialization information, arrive liquid crystal display by J4, simultaneously 8752 begin to check that keyboard presses, putting P2.0-P2.4 at first one by one is low level, and read the keyboard down state from P1.3-P1.7, when detecting the clock show function keys, main process chip 8752 is at first from reading clock in the clock chip 8583 with 8583 SCL that link and SDA, and send the P0 mouth on LCD, to show, when detecting encryption key, main process chip 8752 is a low level by putting P2.0-P2.4, read a limit value from P1.3-P1.7 scanning, by pin one 6,17 read the time in 8583, from the P1.1 pin, read respective value by the IC-card read write line simultaneously, main process chip 8752 is carried out cryptographic calculation to these relevant datas, and operation result shown by P0 mouth liquor charging crystal display, simultaneously by serial communication interface RXD, the T1 mouth of TXD and ILC232 is delivered to printer, print on the check, when detecting the decipher function key, purchasing agent's personal identification number and check password are keyed in 8752 scannings, by decipherment algorithm, instead solve the check original text, and the liquor charging crystal display shows.

Cryptographic algorithm process of the present utility model is: make primary processor control IC-card through software program, produce a mess code at random by IC-card, produce an irregular mess code through IC-card mess code screening washer screening back, this mess code is just as holding drawer's personal identification number, bearer's personal identification number is encrypted through IC-card once more and is produced a Crypted password, this Crypted password expressly produces check electronic data password as make out an invoice date, limit, check sequence number as check plain text encryption key with check behind data encryption standard algorithm DES algorithm.In above-mentioned cryptographic algorithm, the check Crypted password is a mess code that is produced by IC-card, encrypt the back and formation through screening, because the generation of each Crypted password is a random number, thereby each Crypted password is all different, and this has just guaranteed that a ticket one is close, and the key core of whole cryptographic algorithm partly is an IC-card, IC-card is being controlled the operation of whole cryptographic algorithm, so the security of algorithm is guaranteed by IC-card.The decipherment algorithm process is: by primary processor control bearer's personal identification number is produced clear crytpographic key through the IC-card encryption equipment, this clear crytpographic key and electronic data password decrypt the check original text through the DES decipherment algorithm, as the date of making out an invoice, limit and check sequence number etc.

The utlity model has safe advantage. Because the utility model must insert corresponding IC-card, and finished the machine card and confirmed operation, namely a machine can start after blocking one; Another condition that starts is must carry out the people to block affirmation, be to have drawer's personal identification number on the card, just can enter billing system after only having password corresponding to input, if there is three personal identification number input errors, the IC self-locking, even the so stolen or loss of false-preventing cheque checking machine and IC can't not used if know drawer's personal identification number yet. IC-card be by Hair fastener department of bank issues to constituent parts, and constituent parts card password is different, therefore, even the card password of a unit is revealed, also can only cause the collapse of whole system, the distribution of card pass through that special-purpose card-issuing equipment finishes, have higher security.

Claims

1, check anti-counterfeit identifying machine it comprise primary processor, printer, keyboard, display, clock circuit, primary processor joins by interface and keyboard, display and clock circuit, join through RS232 serial communication interface and printer, it is characterized in that: also comprise IC-card read write line and IC-card, primary processor joins through IC-card read write line and IC-card.

2, check anti-counterfeit identifying machine according to claim 1; it is characterized in that: the IC-card read write line is by clock oscillation circuit, power supply programming Control circuit and drive clamped holding circuit and form; clock oscillation circuit is received on the clock control line of IC-card through Drive Protecting Circuit; the output of primary processor port one pin is received on the power control line of IC-card through power supply programming Control circuit, and another pin of its port is received on the control line that resets of IC-card through driving clamped holding circuit.