CN2196797Y - Numeral-cipher type false protecting and identifying machine for receipt - Google Patents

Abstract

The utility model relates to a numeral-cipher type false protecting and identifying machine for a receipt, and the numeral-cipher type false protecting and identifying machine for a receipt is used for the departments such as each industrial and mining establishment, the commerce retail unit, the custom, the bank, etc., to make the false protecting receipt and is used for the tax department to authenticate whether the receipt is true. The utility model is mainly characterized in that a PC is connected with a printer and a scanner. A false protecting and identifying card with a black box is inserted in the extending slot of a host machine. After each transaction is completed, a false protecting mark which comprises a group of number ciphers can be printed simultaneously on the occasion of printing the receipt. The mark is generated by the combined data encryption algorithm which is arranged on the card. The false identifying is carried out through an interactive mode. Therefore, the false protecting and identifying function is safe, the usage is convenient, and the operability is strong.

Description

Numeral-cipher type false protecting and identifying machine for receipt

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

Tax revenue is the main source of state revenue.But the phenomenon of evading the tax is more general, and tax erosion is serious, wherein the most generally, also is that the most directly method is committed a crime by invoice exactly.The criminal steals the true invoice of coming by buying without the false invoice of industrial and commercial administration department approval or by the people on the black market, forge numeral on invoice; Or seller and buyer gang up mutually in process of exchange, and multi-coupon invoice does not carry out complete manifolding, but it is inconsistent respectively to join the amount of money, receive original dealing money high or receive low so that the purpose that reaches tax dodging, evades taxation.The invoice that present industrial and commercial revenue department printed generally all is to adopt special printing or manufacturing technology, prevents false invoice.But this kind way can only prevent the appearance of false invoice paper, promptly can only partly play the individual's crime that prevents non-financial staff, utilizes invoice then powerless to the situation that revenue department evades taxes, evades taxation for unit self.Therefore, prevent to utilize the crime of invoice only to consider it is not enough, must could stop this criminal offence comprehensively from the invoice full content promptly from opening according to considering to the angle of the whole procedures system of the last checking of revenue department from the making of invoice paper certificate.

The purpose of this utility model is to provide a kind of multi-joint single content of invoice that makes to be consistent, but anti-counterfeit identifying and stop false invoice provides the anti-counterfeit identifying machine of effective means for revenue department's inspection utilizes the invoice crime.

The utility model purpose can reach by following measure: it adds a printer and a scanner composition by the anti-counterfeit identifying card of the logical band black box of PC (comprising main frame, keyboard, display) interpolation of a Daepori.When each transaction, import Item Title (or code name), the amount of money, the tax rate, quantity, account number from keyboard, the chip microprocessor that host CPU is given the anti-counterfeit identifying card marketing informations such as dealing money, the amount of tax to be paid, seller and buyer's account numbers by fifo interface is handled.This processor reads date and time from the time-of-day clock on the card, the serial number that taking-up produces in proper order from black box simultaneously, then, the marketing information that these group data are transmitted together with host CPU is given the encryption chip of combined type encryption system again, then choose a key from the key store of EPROM these group data are encrypted, the numerical ciphers of formation returns to host CPU by FIFO again.At this moment, host CPU also is printed on this group numerical ciphers on the invoice when finishing printed invoice.Because the anti-counterfeit identifying card gives every part of invoice a unique serial number automatically, the dealing money and the amount of tax to be paid are logined simultaneously in black box, can prevent that therefore a invoice from repeatedly printing or to prevent respectively to join content on the multi-joint list of invoice inconsistent.Decrypting process is by the handheld digital scanner electronic cipher on the invoice to be read in computing machine earlier, identification software is discerned the formation string number to electronic cipher, send into the anti-counterfeit identifying card by FIFO then, chip microprocessor on this moment card is chosen decruption key from the decruption key storehouse of EPROM and the table of comparisons, by special encryption chip this group numerical ciphers is decrypted the formation set of number expressly, deliver on the principal computer by FIFO again, thereby can be at each major parameter that demonstrates on the screen on the original invoice, again with invoice on data compare, if forge numeral or false invoice on the invoice, then the numeral after the deciphering must not be inconsistent with the numeral on the invoice, thereby can judge the true and false of invoice.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a composition frame chart of the present utility model;

Fig. 2 is an anti-counterfeit identifying card schematic diagram of the present utility model;

Fig. 3 is the FIFO schematic diagram on the utility model anti-counterfeit identifying card.

This anti-counterfeit identifying machine is made up of PC (containing host keyboard, display), printer and scanner, at the anti-counterfeit identifying card of a band black box of host expansion slot interpolation.This anti-counterfeit identifying card is by a slice microprocessor, KL-32 special encryption chip, a slice 64KByteEPROM(27C512), a slice 128KByteEPROM(27010) or a slice 64KByteEPROM(27512), a slice 32KByteSRAM(62256), the E of a slice 8KByte ²Real-time clock, some GAL logics and a FIFO(first in first out of PROM, the protection of a slice band backup battery) the circuit composition.It can be inserted on the microcomputer of any PC bus or AT-bus.Its principle of work is: when each transaction, import Item Title, the amount of money, the tax rate, quantity, account number from keyboard, main frame is with dealing money, the amount of tax to be paid, the seller and buyer's account number exchanges data buffer interface by FIFO(first in first out logic realization principal computer and anti-counterfeit identifying card) pass to the chip microprocessor on the card, simultaneously the amount of money and the amount of tax to be paid are logined in black box.In addition, this processor reads date and time from the real-time clock that blocks again from the serial number that black box takes out an order generation, and organize data together with this and give special encryption chip, choosing a key again from the key store of EPROM encrypts these group data, realize the cryptographic calculation process of combined type data encryption system, the numerical ciphers that forms is given host CPU by FIFO again, and this moment, host CPU was printed on this group numerical ciphers on the invoice when finishing printed invoice.Real-time clock is used for producing date and time, and the IC-card interface is that agent authorized reads the data in the anti-counterfeit identifying card black box, and this black box is by the 8KBE under microprocessor control ²The time-of-day clock of PROM and battery backup constitutes.Microprocessor is finished the algorithmic procedure of choosing encryption key and select decruption key from the encryption key storehouse on the anti-counterfeit identifying card, generates and write down serial number simultaneously, preserve the amount of money, time, date, the serial number of each transaction and move back, the invalidated ticket record.The all solid envelope of above chip has only input-output line to expose, to improve the security of system for one.

The combined type data encryption system that the RSA Algorithm that this encryption method adopts the DES algorithm (128bit) of expansion to add emulation combines, emulation RSA Algorithm wherein then constitutes according to the principle of " the concurrent mapping algorithm of integer " and " the multiple division of integer ", and the special encryption chip that is adopted is the KL-32ASIC chip.The principle of robotization and mobilism is then adopted in the management of key, realize by one time cryptosystem algorithm and storage converter technique, its encryption key storehouse is by the EPROM(27512 of a slice 64KB) constitute, its decruption key storehouse and index database then are made of the EPROM chip (27C010) of a slice 128KB.Whole encrypting and authenticating algorithm reaches under the software control of writing specially at chip microprocessor and finishes.

The utlity model has following advantage:

1. because the combined type AES that this machine adopts secret key encryption and public-key cryptography deciphering to combine is encrypted and authenticates invoice, have more intense confidentiality and security.

2. when discriminating digit, adopt interactively method, so that when the data on the invoice are fuzzy, can be by manually giving aid identification, easy to use, workable.

3. comprise that owing in the black box data of the amount of tax to be paid can only read and can not change, so this anti-counterfeit identifying machine has tax control function simultaneously.

4. on using, can independently use, also can network,, only need the corresponding several keys of input can realize whole encrypting and authenticating process for the layman.It is fit to all industrial and mining enterprises, business management system, customs, bank etc. need open unit according to bill, has wide range of applications.

Claims (2)

1, a kind of departments such as each industrial and mining enterprises, retailing unit and customs, bank that are used for open the numeral-cipher type invoice anticounterfeiting identifying machine that false proof bill and revenue department authenticate true from false of bills, mainly printer, the scanner that is connected with it by the PC that contains main frame, keyboard, display formed, and it is characterized in that: insert an anti-counterfeit identifying card at host expansion slot.

2, numeral-cipher type invoice anticounterfeiting identifying machine according to claim 1; it is characterized in that forming the special encryption chip of numerical ciphers (anti-false sign), two EPROM, a slice SRAM after false proof knowledge card is encrypted by a slice microprocessor, to the major parameter on the invoice, it is an integral body that real-time clock, some GAL logics and a fifo circuit of a slice non-volatile memories body, the protection of a slice band backup battery seal admittedly.

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