CN1145506A - I.C card general code variable seal device - Google Patents

Abstract

A universal cipher-variable sealing device using IC card is suitable for bank user and can replace seal. A digital signature system is used. User cipher is stored in IC card, not in the sealing device. Said IC card conforms with the standards ISO7816PART1.2 and 3, and asynchronous half-duplex block transmission protocol is used for communication. Its cipher is randomly generated in special computer and can not be deciphered. Its output mode is 120-bit 2-D bar code "print mode" and 18-digit "handwriting mode".

Description

The general code converter of integrated circuit card

The invention discloses a kind of a kind of general facility that the banking system user adopts change sign indicating number replacement seal seal that relate to, adopted digital signature system and deposited user cipher with the most safe and reliable generally acknowledged in the world IC-card.

At present in bank's service for corporate customers, when the client opens an account with the bank, must hand over bank to put on record in its employed seal sample, this seal sample, bank is referred to as " reserved specimen seal ", and the client is when bills such as use check only for account, cash on bank, remittance, mail transfer list, must add a cover seal can come into force, bank is when accepting these bills, and whether the seal that examine on the bill is consistent with this client " reserved specimen seal ", does not meet then and refuses payment.This mode of doing business is approved by law." but with the seal payment " mode is differentiated main experience with operating personnel fully according to naked eyes.And the seal seal has no disguise and can say that this makes that its antifalsification is very poor, and seal seal case of forgery is a nothing to be surprised at.In addition, the financial world in the many cities of China has realized the computer networking with city or different city at present, uses the Computer Processing bill, and the processing of a bill data only needed to finish in tens seconds with transmission, also need artificial treatment and have seal identification only, become Financial Information to handle and the bottleneck that transmits.

Becoming code signature is a string specific number that is calculated by micro computer change code signature counter or computing machine, is a kind of seal form that is different from traditional seal seal.It is the result that multinomial data processing is encrypted, and has implied multiple information, comprises each the big key element (as: account number, voucher number, date, limit, valid period etc.) on the voucher, and user cipher.Bank comes the legitimacy of decides bill by checking user's change sign indicating number.Because becoming code signature is the result of multinomial data encryption, its external manifestation is changeable, has guaranteed to become the height antifalsification of code signature, prevents the correction of bill effectively.In addition, be set of number owing to become sign indicating number, computing machine can transmit and handle easily.

" change code signature " is that bank realizes the gordian technique that service for corporate customers is deposited and withdrawn at any branch bank.Becoming the use of code signature, is the institutional revolution of bank settlement, and it can effectively quicken turnover, shortening fund time in transit, the saving human and material resources of fund; The coding seal that utilization can not be decoded, can not be forged has really been realized banking procedure where deposits and withdrawals are processed at any branch bank, and can effectively prevent the generation of check fraud case.The Chinese patent that the present technique field retrieves [90105525.5] for " become a micro computer that sign indicating number replaces seal become a code signature device ".Its security depends on that the security of this system is relatively poor to the maintaining secrecy and the user is reserved in maintaining secrecy of bank cipher of algorithm itself.If algorithm is divulged a secret, will cause deathblow to the security of system.It also can't prevent the possibility of internal work personnel of bank and the common cheating of system development technician simultaneously.The utility model of having submitted before the present invention proposes: the general change code signature of IC-card device owing to be subjected to the classification restriction, only discloses the shape and the structure of product.Be further to set forth design philosophy of the present invention, will propose new technical scheme the middle weak point of prior art.

One of purpose of the present invention is: make IC-card and code converter separately, neither deposit any data in the code converter, also do not do any cryptographic calculation, only as an input-output device.

Two of purpose of the present invention is: utilize the encryption mechanism of IC-card, make the interior password of IC be difficult to decode, IC-card can be carried, and convenient the use makes the present invention become the common apparatus of a confidentiality, good reliability.

Be the above task that realizes that the present invention proposes, form by IC-card and seal device two parts, have on the casing of seal device in the LCD panel of 20 groups of character remindings and 18 bit digital, 34 buttons, IC-card deck, standard serial communication port, the casing dry cell, circuit board and one-chip computer are housed, its major technique feature also is, there is exclusive data in the described IC-card, comprises account number, password and all cryptographic calculation software programs; One-chip computer is that its inside of EPSONSMC88316 has 16KB ROM, 2KB RAM, and band 51segment * 32common liquid crystal display drives, and outside addressable space expansion reaches 2MB, three groups of Timer, a serial-port; The data bus of extender storer, address bus and control bus all directly link to each other with CPU; CPU directly drives and has 20 groups of Chinese promptings and 18 bit digital, bits per inch word band ＂. ＂ and ＂, the LCD panel of ＂; Keyboard array is made up of 34 buttons, forms comprising 13 numerical keys, 9 calculator function keys and 12 change code signature device function keys.Become in the code signature device and do not deposit any encrypted message, the IC-card that is adopted meets ISO7816PART1, PART2, PART3 standard, adopts asynchronous half-duplex block transfer agreement T=1 to come communication.The Crypted password password adopts special purpose computer to generate at random, and the source program that generates password can disclose, and generates two groups of different associated cryptographics at every turn, and in the IC-card that a group deposits the user in, a group encryption is deposited main frame in the bank.Utilize the encryption mechanism of IC-card, the interior password of card can't be decoded.

Adopt DES, RSA Algorithm to combine on the software, the security of system is attained in perfection.RSA is a kind of famous Public Key Cryptosystem, and its basic thought is separated encryption key and decruption key.Each user has own distinctive Crypted password (being public keys) and clear crytpographic key (being privacy key).Carry out enciphering transformation with Crypted password respectively, be decrypted conversion with clear crytpographic key.The process of encryption and decryption is two different conversion, and used password is also inequality.The employed Crypted password of user is different with clear crytpographic key in depositing database in the bank in this code converter, and bank only keeps the legitimacy that the clear crytpographic key checking becomes sign indicating number, can't generate user's legitimate signature.The cribber can not find out the relation of Crypted password and clear crytpographic key in the effective time.

IC-card is inserted deck, and after correctly importing personal identification number, can start and calculate the function that becomes code signature; And when selecting ＂ printing type ＂, output is one group 120 two-dimensional bar code, comprising: it is normal that alignment target line, vertical markings, beginning flag line, termination flag line, 3 become the sign indicating number actual bit, and 22 account numbers, 92 become sign indicating number, 3 CHECKSUN; When selecting ＂ write by hand mode ＂, be output as one group of 18 bit digital.

The good effect performance that the present invention produced is as follows:

1. all exclusive data (account numbers, password etc.) all be stored on the IC-card, all cryptographic calculations all carry out on IC-card, this make to become code signature device itself be one not with the universal product of any exclusive data, different units can use same change code signature device in different banking systems.

2. the employed Crypted password of user is different with clear crytpographic key in depositing database in the bank, and bank only keeps the legitimacy that the clear crytpographic key checking becomes sign indicating number, can't correctly generate user's change code signature.The cribber can not find out the relation of Crypted password and clear crytpographic key in the effective time.

Below in conjunction with accompanying drawing, the present invention is made concrete further specifying: Fig. 1, be construction profile synoptic diagram of the present invention.Fig. 2 is this two-dimensional bar code seal structural representation.See Fig. 1, seal utensil of the present invention has in casing, 20 groups of character remindings and 18 bit digital bands ". " and " ,'s " LCD panel, 34 buttons, IC-card deck, standard serial communication port, the casing dry cell, circuit board is housed.One-chip computer adopts the SMC88316 of EPSON, and band 51segment * 32common liquid crystal display drives; Battery is the non-rechargeabel dry cell of two joint AASIZE (No. five), but continuous working was not less than 20 hours.

Keyboard array is by being made up of 34 buttons, and 13 numerical keys are respectively: ＂ 1 ＂, ＂ 2 ＂, ＂ 3 ＂, ＂ 4 ＂, ＂ 5 ＂, ＂ 6 ＂, ＂ 7 ＂, ＂ 8 ＂, ＂ 9 ＂, ＂ 0 ＂, ＂ 00 ＂, ＂ 000 ＂, ＂. ＂, ＂, ＂;

9 calculator function keys are respectively: ＂+＂, ＂-, ＂ * ＂, ＂ ÷ ＂, ＂ Mc ＂, ＂ Mr ＂, ＂ M+ ＂, ＂ M-, ＂ C ＂;

12 change code signature device function keys are respectively: ＂ authorizes ＂, and ＂ prints ＂, and ＂ calculates ＂, ＂ change of secret code ＂, and ＂ mode switch ＂, ＂ eliminates ＂, ＂ ← ＂, ＂ ↑ ＂, ＂ ↓ ＂, ＂ ENTER ＂, ＂ ON ＂, ＂ OFF ＂ forms.

See two-dimensional bar code of the present invention among Fig. 2, terminated line 1, CHECKSUN2 becomes code signature 3, and it is long by 4 to become the sign indicating number actual bit, beginning flag line 5, alignment target line 6, vertical markings 7.

Exemplify best enforcement below in conjunction with accompanying drawing.

Seeing Fig. 1, is most preferred embodiment figure of the present invention, has in casing, 20 groups of character remindings and 18 bit digital bands ". " and " ,'s " LCD panel, 34 buttons, IC-card deck, standard serial communication port, the casing dry cell, circuit board are housed.Seal device of the present invention is made up of LCD panel (comprising 20 groups of character remindings and 18 bit digital, band ". " and ", "), keyboard array, one-chip computer, extender storer, IC-card deck, battery, RS232C communication port.One-chip computer adopts the SMC88316 of EPSON, there is 16KBROM its inside, 2KB RAM, band 51segment * 32common LCD driver, outside addressable space expansion reaches 2MB, three groups of Timer, a serial-port is a kind of up-to-date low-power consumption, high-performance one-chip computer; The extender storer adopts 27C256, and the extension storage capacity is 32KB, and for the usefulness of code converter expanding program in future, its data bus, address bus and control bus all directly link to each other with CPU; There is the LCD panel of 20 groups of character remindings and 18 bit digital (band ". " and ", ") directly to drive by CPU; Keyboard array is made up of 34 buttons, comprising 13 numerical keys (1,2,3,4,5,6,7,8,9,0,00,000 .), 9 calculator function keys (+,-, *, ÷, MC, MR, M+, M-C) becomes code signature device function keys (mandate, printing with 12, metering, change of secret code, mode switch is removed, ←, ↑, ↓, ENTER, ON OFF) forms; The IC-card deck is a push-pull, and IC-card meets ISO7816 PART1, PART2, PART3 standard, adopts asynchronous half-duplex block transfer agreement T=1; When IC-card did not insert, change code signature device can only be used as counter, had only the IC-card of insertion and correctly can enable change code signature computing function behind the input password; All exclusive data (account numbers, password etc.) all be stored on the IC-card, all cryptographic calculations all carry out on IC-card, this make to become code signature device itself be one not with the universal product of any exclusive data, different units can use same change code signature device in same banking system.In addition, same unit also can use same to become sign indicating number mirror seal device in how tame bank.

Claims (5)

1. the general change code signature of IC-card device, form by IC-card and seal device two parts, have on the casing of seal device in the LCD panel of 20 groups of character remindings and 18 bit digital, 34 buttons, IC-card deck, standard serial communication port, the casing dry cell, circuit board and one-chip computer are housed, its feature also is: become code signature device itself and be one not with the universal product of any exclusive data, all exclusive datas comprise that account number, password and all cryptographic calculation software programs all are stored in the IC-card;

A) there is 16KB ROM one-chip computer inside, 2KB RAM, and band 51segment * 32common LCD driver, outside addressable space expansion reaches 2MB, three groups of timing/timers;

B) data bus of extender storer, address bus and control bus all directly link to each other with CPU;

C) CPU directly drives and has 20 groups of Chinese promptings and 18 bit digital, bits per inch word band ＂. ＂ and ＂, the LCD panel of ＂;

D) keyboard array is made up of 34 buttons, forms comprising 13 numerical keys, 9 calculator function keys and 12 change code signature device function keys.

2. according to the general code converter of the described a kind of IC-card of claim 1, it is characterized in that above-mentioned IC-card deck is a push-pull.

3. according to claim 1, the general change code signature of 2 described a kind of IC-cards device, it is characterized in that, after described IC-card correctly inserts machine for punching the card, input personal identification number, can start and calculate the merit that becomes code signature; And printout is one group 120 a bar code, comprising: it is normal that alignment target line, vertical markings, beginning flag line, termination flag line, 3 become the sign indicating number actual bit, and 22 account numbers, 92 become sign indicating number, 3 CHECKSUN; Write by hand output is one group of 18 bit digital.

4. the general change code signature of a kind of IC-card according to claim 1 device is characterized in that described IC-card meets ISO7816 PART1, PART2, PART3 standard, adopts asynchronous half-duplex block transfer agreement T=1.

5. the general change code signature of a kind of IC-card according to claim 1 device, it is characterized in that, above-mentioned keyboard array is by being made up of 34 buttons, 13 numerical keys, be respectively: ＂ 1 ＂, ＂ 2 ＂, ＂ 3 ＂, ＂ 4 ＂, ＂ 5 ＂, ＂ 6 ＂, ＂ 7 ＂, ＂ 8 ＂, ＂ 9 ＂, ＂ 0 ＂, ＂ 00 ＂, ＂ 000 ＂, ＂. ＂, ＂, ＂;

9 calculator function keys are respectively: ＂+＂, ＂-, ＂ * ＂, ＂ ÷ ＂, ＂ Mc ＂, ＂ Mr ＂, ＂ M+ ＂, ＂ M-, ＂ C ＂;

12 change code signature device function keys are respectively: ＂ authorizes ＂, and ＂ prints ＂, and ＂ calculates ＂, ＂ change of secret code ＂, and ＂ mode switch ＂, ＂ eliminates ＂, ＂ ← ＂, ＂ ↑ ＂, ＂ ↓ ＂, ＂ ENTER ＂, ＂ ON ＂, ＂ OFF ＂ forms.