CN201210325Y - Mobile storage device - Google Patents
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- CN201210325Y CN201210325Y CN 200820108699 CN200820108699U CN201210325Y CN 201210325 Y CN201210325 Y CN 201210325Y CN 200820108699 CN200820108699 CN 200820108699 CN 200820108699 U CN200820108699 U CN 200820108699U CN 201210325 Y CN201210325 Y CN 201210325Y
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Abstract
This utility model is a mobile storage device for realizing the safe shift of tax control data, including a shell and a power supply unit. The shell is provided with a communication unit for connecting with a data interface of a first data transceiving system or a second data transceiving system; a storage unit for storing the tax control data; a processing unit respectively connected with the communication unit and the storage unit and for validating the validity of the first or second data transceiving system so as to process the acquired tax control data, and respectively storing one part of the tax control data in the processing unit and transmitting the other part of the tax control data to the storage unit.
Description
Technical field
The utility model relates to a kind of movable storage device that is applied in the tax-control data transfer system.
Background technology
A large amount of, anti-false tax-controlled systems that hardware constitute soft by computing machine especially towards the tax collection and administration of general taxpayer enterprise, have been used in tax collection and administration field in China, and these anti-false tax-controlled systems are distributed in the tax bureau and the enterprise in each province, city, area.The main effect of anti-false tax-controlled system is the forgery that prevents the forgery of invoice and enterprise's revenue and expenditure information.
The anti-false tax-controlled system that is installed in enterprise is responsible for invoicing, writes down corresponding tax-control data simultaneously.When official hour goes to the tax bureau to declare dutiable goods in every month, use special-purpose device to be delivered to the tax bureau tax-control data.The anti-false tax-controlled system of the tax bureau is responsible for receiving tax-control data, and differentiates the true and false of tax-control data and the true and false of invoice.Mentioned the transfer and the device of tax-control data in this link, the application has proposed new invention at the safe transfer method of tax-control data and transfer device.
Before elaboration is of the present utility model, earlier the notion of tax-control data and its importance are explained, tax-control data has comprised the information of making out an invoice of enterprise, the invoice code, invoice number, the side's of purchasing duty paragraph, the side's of pin duty paragraph, invoice total, invoice total amount of tax, merchandise classification, trade name, commercial specification/model, cargo price, the commodity amount that specifically comprise each invoice, the commodity amount of money etc., tax-control data have also comprised the information of other reflection business transaction situation.The amount of tax to be paid that enterprise should pay is checked according to the tax-control data of enterprise by the tax bureau, this shows the significance level of the true and false of tax-control data to repercussion of tax.
From enterprise's tax-supervise system billing system generation tax-control data of making out an invoice, to transferring to through transfer device in the middle of the process of tax bureau's anti-false tax-controlled system, the safe transfer of tax-control data is an important link.The transfer method that present anti-false tax-controlled system adopts and device as following three kinds of situations: (public)
1, tax-control data is divided into two parts, a part writes in the IC-card of enterprise's anti-false tax-controlled system outfit, another part
Be packaged into a common document copying to the USB flash disk the inside by direct derivation of enterprise's anti-false tax-controlled system, take IC-card and USB flash disk to transfer that the tax bureau finishes tax-control data by the personnel that declare dutiable goods of enterprise.
2, tax-control data is divided into two parts, a part writes in the IC-card of enterprise's anti-false tax-controlled system outfit, another part is derived the back encryption by enterprise's anti-false tax-controlled system and is packaged into a common document copying to the USB flash disk the inside, takes IC-card and USB flash disk to transfer that the tax bureau finishes tax-control data by the personnel that declare dutiable goods of enterprise.Here the encryption of carrying out is to use anti-false tax-controlled system to encrypt or encrypt with third-party security product.
3, tax-control data is divided into two parts, a part writes in the IC-card of enterprise's anti-false tax-controlled system outfit, another part is derived the back by the enterprise anti-false tax-controlled system and is encrypted or do not encrypt the tax bureau that sends e-mails, the anti-false tax-controlled system of the tax bureau that imports of manual operations again after the staff of the tax bureau receives.
The characteristics of the technical scheme that above-mentioned tax-control data transfer method adopts are that IC-card is the IC-card of CPU type, and promptly the core of IC-card is a cpu chip, and this CPU carries the storer of a constant volume.The specific program of operation in the CPU of IC-card, the function that described program realizes is that checking is carried out the legitimacy of the equipment of read-write operation to it, writing of data and read operation are carried out in the order that receives read-write equipment if read-write equipment is legal, if read-write equipment does not conform to rule rejection order.Use the set of these orders just can realize that taxation control system writes tax-control data to IC-card, read tax-control data from IC-card in the taxation control system of the tax bureau in enterprise.Because this IC-card can not freely be read and write, and be to be operated automatically by taxation control system, inartificial the participation is so the security of tax-control data and accuracy are guaranteed.The tax-control data that does not use IC-card to transmit that said method is described, the process taxation control system is encrypted or is not encrypted and directly is packaged into a file, carry out the order of copied files by hand to generic storage equipment such as USB flash disks by operating personnel, or manual sending e-mails, arrive the tax bureau and copied out or received Email by operating personnel are manual again, imported the anti-false tax-controlled system of the tax bureau then.
By transfer method and the device of analyzing existing tax-control data, we find that described method and apparatus has following several shortcomings:
Shifting the phenomenon that memory storage that tax-control data uses exists IC-card and common storage device and deposits, is that the capacity of IC-card can't hold the tax-control data that enterprise's taxation control system generates because be limited in the level of present IC-card manufacturing technology.
That part of tax-control data that does not use IC-card to transmit, operating process has artificial contact tax-control data, and transfer process is used the common storage device storage, and the security of tax-control data and accuracy all can not get guaranteeing.
The tax bureau that has for the safety of tax-control data and accurately, once required the enterprise in area under one's jurisdiction to use IC-card repeatedly to come and go at the tax bureau and enterprise's transfer tax-control data, move as ant, because tax-control data is many, the personnel that declare dutiable goods sometimes go in a week three times, went in one month tens times, had a strong impact on operate as normal, this treating method is because infeasible coming down hard upon of suffering enterprise.
From top analysis we as can be seen, present tax collection and administration, especially towards the tax collection and administration of general taxpayer enterprise, between the taxation control system of the enterprise and the tax bureau, press for a kind of can safety, the disposable method that tax-control data is shifted.
Summary of the invention
The purpose of this utility model is, a kind of movable storage device is provided, and in order to overcome above-mentioned defective, satisfies the needs of tax-control data safe transmission.
For achieving the above object, the technical solution adopted in the utility model is, a kind of movable storage device is provided, and in order to realize the tax-control data safe transfer, it has a housing and a power supply unit, it is characterized in that, is provided with in the described housing:
One communication unit, it is connected in order to the data-interface with one first data receiving-transmitting system or one second data receiving-transmitting system;
One storage unit, it is in order to the storage tax-control data;
One processing unit, it is connected with described communication unit and storage unit respectively, in order to the legitimacy of described first data receiving-transmitting system or described second data receiving-transmitting system is verified, the tax-control data that obtains is handled, and respectively will be wherein a part of tax-control data be stored in the described processing unit, another part tax-control data is transferred to described storage unit.
Preferable, described processing unit comprises: one first safe processor and one and second safe processor that is connected, wherein, described first safe processor stores first key and first identity information, and described second safe processor stores second key and second identity information;
Preferable, one of them signaling interface of described first safe processor or described first safe processor is connected with the output terminal of physical damage testing circuit, temperature detection, voltage detecting and frequency detection circuit respectively;
Preferable, the connected mode between described first safe processor and second safe processor adopt USB, SPI, 7816 one of them;
Preferable, described storage unit is a direct storage chip;
Preferable, described storage unit comprises: communication interface and storer, wherein said storer be a standard hard drive, SD card, USB flash disk one of them, described interface and storer integrate jointly;
Preferable, described communication unit use USB mode, PCI-E or UWB one of them.
The beneficial effects of the utility model are compared with the prior art, deduct supernumerary worker's cost and time loss, and the tax-control data that can avoid business development to bring is handled bottleneck, simultaneously tax-control data is all sealed, avoided being exposed to the tax-control data leakage of outside or being tampered, also just avoided potential tax erosion risk.
Description of drawings
Fig. 1 is the utility model movable storage device functional block diagram;
Fig. 2 realizes the process flow diagram of tax-control data safe transfer for the utility model movable storage device;
The process flow diagram that Fig. 3 carries out two-way authentication for movable storage device in the utility model tax-control data safe transfer method and first data receiving-transmitting system;
Fig. 4 carries out being transferred to after tax-control data is encrypted the process flow diagram of movable storage device for first data receiving-transmitting system in the safe transfer of the utility model movable storage device realization tax-control data;
The process flow diagram that Fig. 5 carries out two-way authentication for the movable storage device and second data receiving-transmitting system in the safe transfer of the utility model movable storage device realization tax-control data;
Fig. 6 sends the tax-control data of its storage to the process flow diagram of second data receiving-transmitting system for movable storage device in the safe transfer of the utility model movable storage device realization tax-control data.
Embodiment
Below in conjunction with accompanying drawing, do also detailed explanation with other technical characterictic and advantage to the utility model is above-mentioned.
See also shown in Figure 1ly, it is the utility model movable storage device functional block diagram; It has a housing and a power supply unit 2, be provided with in the described housing: a communication unit 3, its with and one first data receiving-transmitting system or one second data receiving-transmitting system carry out data interaction, and carry out the mutual of data between the described enclosure interior functional unit; Need to prove at taxation control system, described first data receiving-transmitting system and second data receiving-transmitting system be respectively tax control office anti-false tax-controlled system or enterprise's anti-false tax-controlled system one of them; And a storage unit 5, in order to the storage tax-control data, its storage capacity is just enough born the purpose that tax-control data shifts like this as the core devices of data storage for it; The most important thing is a processing unit 4, it is in order to verify described first data receiving-transmitting system that combines with it or the legitimacy of described second data receiving-transmitting system, the tax-control data that obtains is handled, and respectively will be wherein a part of tax-control data be stored in the described processing unit 4, another part tax-control data is transferred to described storage unit 5.What we adopted for the processing unit in the utility model 4 is the implementation of two safe processor hardware, it comprises: one first safe processor 41 and second a coupled safe processor 42, wherein, described first safe processor 41 stores first key and first identity information, and described second safe processor 42 stores second key and second identity information.These described identity informations are to use in order to carry out authentication; Described communication unit 3, first safe processor 41, second safe processor 42, storage unit 5 and power supply unit 2 are installed on the circuit board 1 and have circuit to connect each other, annexation for the data communication correspondence is a communication unit 3, it is also as the external communication interface of whole device, described communication unit 3 is connected with described first safe processor 41, described second safe processor 42 is connected with described first safe processor 41, described storage unit 5 is connected with described first safe processor 41, and described power supply unit 2 is the each several part power supply; Described circuit board 1 in enclosure interior, moves specific program as an overall fixed in described first safe processor 41 and described second safe processor 42.Simultaneously in order to guarantee to be stored in the safety of data in the described movable storage device, after preventing the destructive dismounting of unauthorized person, internal data is stolen, and one of them is provided with described first safe processor 41 or described second safe processor: physical damage testing circuit, temperature detection, voltage detecting and frequency detection circuit.Abnormal conditions such as temperature anomaly take place, electric signal is unusual or chip when suffering physical damage, removes inner program and data when described first safe processor 41 or second safe processor 42 detect the improper signal of these circuit feedbacks automatically.
To be that a chip or an interface add memory device when storage unit described in the utility model is specifically implemented, as chip such as former popular EEPROM, the NANDFLASH chip of current trend, the NORFLASH chip, add memory device as an interface, such as connecing a standard hard drive, the SD card, USB flash disk or the like, this interface and memory storage are integrated in the utility model jointly and describe on the circuit board of movable storage device and constitute storage unit, such processing mode does not influence the enforcement of scheme, capacity is configurable simultaneously, conveniently satisfies business demand.
Communication unit uses the USB mode, because the USB mode is extensive use of at present, so the utility model can adopt this mode at present, in fact can also use PCI-E, UWB or other contact, non-contact interface.As long as easy to use, cost and speed are reasonable, use which type of interface not influence the enforcement of this programme.
Connected mode between described first safe processor 41 and second safe processor 42 adopt USB, SPI, 7816 all can, can both satisfy the requirement of scheme implementation.
The goal of the invention of in fact above-mentioned the utility model movable storage device is, in application, realize the safe transfer of tax-control data, can between described first data receiving-transmitting system and described second data receiving-transmitting system, carry out that tax-control data shift to realize by above-mentioned movable storage device, see also shown in Figure 2ly, it is that the utility model movable storage device realizes the process flow diagram of tax-control data safe transfer; It step that comprises is,
Step a: the distribution unit writes user profile and key to described movable storage device in advance;
Step b: described movable storage device and described first data receiving-transmitting system carry out two-way authentication, if authentication success is carried out following step c, otherwise carry out following step f;
Step c: described first data receiving-transmitting system carries out being transferred to described movable storage device after tax-control data is encrypted;
Steps d: described movable storage device and described second data receiving-transmitting system carry out two-way authentication, if authentication success is carried out following step e, otherwise carry out following step f;
Step e: described movable storage device sends the tax-control data of its storage to described second data receiving-transmitting system, carries out following step g;
Step f: shift illegally, can't carry out data and shift;
Step g: finish.
In fact step a is exactly the notion of a kind of " distribution ", need set up enterprise's taxation control system when enterprise sets up usually, the software and hardware that described system comprises need be bought from tax office, the management of the tax office taxation control system under described enterprise taxation control system need be included in after buying, the operation of a series of tax of correspondence office taxation control system, what the process of this operation claimed is distribution.Below the distributing method of tax-control data safe transfer device is made specific descriptions.
Enterprise's taxation control system and tax-control data transfer device are unified in tax bureau's taxation control system in area under one's jurisdiction and issue, and set up corresponding relation.The transfer device of described enterprise only is the data exchange service between described enterprise and the tax office, that is to say that a transfer device only provides a transfering channel, corresponding commutative relation, that is exactly affiliated enterprise's taxation control system of device and the commutative relation between the tax office taxation control system under the described enterprise taxation control system.Here under said relationship between superior and subordinate in the management of taxation control system.
Concrete distribution process is:
The first step, blank movable storage device inserts tax bureau's taxation control system.
In second step, the taxation control system of the tax bureau writes the identity information of owned enterprise to movable storage device, such as enterprise name, duty paragraph or the like.First safe processor 41 in the movable storage device is received the data storage area that is stored in oneself after these data are handled from communication unit 3, then the data after handling are sent to second safe processor 42, handle the data storage area that is stored in oneself after described second safe processor 42 is received.
The 3rd step, the taxation control system of the tax bureau writes key to movable storage device, after receiving key, handles described first safe processor 41, be stored in the data storage area of oneself then, then the key data after handling is sent to second safe processor 42, handle after described second safe processor 42 is received, be stored in the data storage area of oneself then.
The 4th step finished communication, and disconnection communicates to connect, and finishes distribution.
See also shown in Figure 3ly, it realizes the process flow diagram that movable storage device and first data receiving-transmitting system carry out two-way authentication in the tax-control data safe transfer for the utility model movable storage device; It step that comprises is:
Step b1: described first data receiving-transmitting system sends the request of reception to described movable storage device;
Step b2: described movable storage device sends to described first data receiving-transmitting system and comprises expressly and first packet of ciphertext form;
Step b3: described first data receiving-transmitting system carries out encryption and decryption to described first packet to be handled;
Step b4: the data of data after the processing and the described first data receiving-transmitting system internal reservoir are compared, and carry out following step b5 if conform to, otherwise carry out following step f;
Step b5: described movable storage device sends the request of reception to described first data receiving-transmitting system;
Step b6: described first data receiving-transmitting system sends to described movable storage device and comprises expressly and the packet of ciphertext form;
Step b7: described movable storage device carries out encryption and decryption to described packet to be handled;
Step b8: the data of data after the processing and described movable storage device internal reservoir are compared, and carry out following step b9 if conform to, otherwise carry out following step f;
Step b9: authentication is passed through.
Essence is that sender's first data receiving-transmitting system (taxation control system) sends an order of reading identity information to movable storage device " to receive request " among the described step b1, first safe processor 41 of described movable storage device receives that back data storage area and described second safe processor 42 from oneself of this order reads identity information, return to sender's taxation control system after handling, the data after the processing comprise the plaintext ciphertext of identity information.Here, the processing that described first safe processor 41 and second safe processor 42 carry out comprises: use own key that the identity information of oneself storing is encrypted, or according to the adjustment of the sequence that sets in advance to the data format permutation, because cipher mode can comprise multiple conversion, and these conversion do not influence the enforcement of this programme.
Essence is the identity information of movable storage device to this taxation control system of sender's taxation control system request " to receive request " among the described step b5.Sender's taxation control system receives after the request that the identity information data with self send to movable storage device, described movable storage device receives that carrying out encryption and decryption after the identity information data of taxation control system handles, also give simultaneously second safe processor 42 and carry out the encryption and decryption processing, the result who handles gathers at first safe processor, 41 places, if the identity of this taxation control system of data presentation after handling and the information inconsistency that oneself writes down then stop communicating by letter.If unanimity then think that sender's taxation control system is legal.
See also shown in Figure 4ly, it is realized first data receiving-transmitting system in the tax-control data safe transfer for the utility model movable storage device and carries out being transferred to after tax-control data is encrypted the process flow diagram of movable storage device; It step that comprises is:
Step c1: described movable storage device obtains the tax-control data that described first data receiving-transmitting system sends;
Step c2: described first safe processor 41 wherein first's tax-control data is stored in the described storage unit 5, and the second portion tax-control data is transferred to described second processor 42;
Step c3: described second safe processor 42 is with described second portion tax-control data deciphering and storage.
See also shown in Figure 5ly, it realizes the process flow diagram that movable storage device and second data receiving-transmitting system carry out two-way authentication in the tax-control data safe transfer for the utility model movable storage device; It step that comprises is:
Steps d 1: described second data receiving-transmitting system sends the request of reception to described movable storage device;
Steps d 2: described movable storage device sends to described second data receiving-transmitting system and comprises expressly and second packet of ciphertext form;
Steps d 3: described second data receiving-transmitting system carries out encryption and decryption to described second packet to be handled;
Steps d 4: the data of data after the processing and the described second data receiving-transmitting system internal reservoir are compared, and carry out following steps d 5 if conform to, otherwise carry out following step f;
Steps d 5: described movable storage device sends the request of reception to described second data receiving-transmitting system;
Steps d 6: described second data receiving-transmitting system sends to described movable storage device and comprises expressly and the packet of ciphertext form;
Steps d 7: described movable storage device carries out encryption and decryption to described packet to be handled;
Steps d 8: the data of data after the processing and described movable storage device internal reservoir are compared, and carry out following steps d 9 if conform to, otherwise carry out following step f;
Steps d 9: authentication is passed through;
Essence is that debit's second data receiving-transmitting system (taxation control system) sends an order of reading identity information to movable storage device " to receive request " in the described steps d 1, first safe processor 41 of described movable storage device receives that back data storage area and described second safe processor 42 from oneself of this order reads identity information, return to debit's taxation control system after handling, the data after the processing comprise the plaintext ciphertext of identity information.Here, the processing that described first safe processor 41 and second safe processor 42 carry out comprises: use own key that the identity information of oneself storing is encrypted, or according to the adjustment of the sequence that sets in advance to the data format permutation, because cipher mode can comprise multiple conversion, and these conversion do not influence the enforcement of this programme.
Essence is the identity information of movable storage device to this taxation control system of debit's taxation control system request " to receive request " in the described steps d 5.Debit's taxation control system receives after the request that the identity information data with self send to movable storage device, movable storage device receives that carrying out encryption and decryption after the identity information data of taxation control system handles, also give simultaneously second safe processor 42 and carry out the encryption and decryption processing, the result who handles gathers at first safe processor, 41 places, if the identity of this taxation control system of data presentation after handling and the information inconsistency that oneself writes down then stop communicating by letter.If unanimity then think that sender's taxation control system is legal.
Fig. 6 sends the tax-control data of its storage to the process flow diagram of second data receiving-transmitting system for movable storage device in the safe transfer of the utility model movable storage device realization tax-control data; It step that comprises is:
Step e1: described second safe processor carries out encryption with 42 storages described second portion tax-control data thereon, transmits described first safe processor 41;
Step e2: described first safe processor 41 takes out described first tax-control data;
Step e3: described first safe processor 41 is converted to complete control data with described first tax-control data and described second portion tax-control data adjustment position;
The technical scheme of this patent can be delivered to the tax bureau safely, once with tax-control data, the inartificial contact of tax-control data, and the tax-control data transfer device is not also like the such any read-write of common U disk.This is to organically combine because of the capacity of this programme with IC-card security and main flow storer, can drop at present to use in batches and be the 64K byte with actual commercial IC-card data storage main flow capacity, maximum have 128K byte and a 256K byte, and the tax-control data that has quite a few enterprise to produce has at present reached tens even more than 100,000,000, development tax-control data along with business will inevitably be increased to hundreds of million in the future, this safe transfer capacity IC-card can't provide, and this method can provide.
Use this programme, can solve the tax-control data branch problem of the present puzzlement enterprise and the tax bureau, deduct supernumerary worker's cost and time loss, and the tax-control data that can avoid business development to bring is handled bottleneck, simultaneously tax-control data is all sealed, avoided being exposed to the tax-control data leakage of outside or being tampered, also just avoided potential tax erosion risk.
The above only is preferred embodiment of the present utility model, only is illustrative for the utility model, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that the utility model claim is limited, revise, even equivalence, but all will fall in the protection domain of the present utility model.
Claims (7)
1, a kind of movable storage device, in order to realize the tax-control data safe transfer, it has a housing and a power supply unit, it is characterized in that, is provided with in the described housing:
One communication unit, it is connected in order to the data-interface with one first data receiving-transmitting system or one second data receiving-transmitting system;
One storage unit, it is in order to the storage tax-control data;
One processing unit, it is connected with described communication unit and storage unit respectively, in order to the legitimacy of described first data receiving-transmitting system or described second data receiving-transmitting system is verified, the tax-control data that obtains is handled, and respectively will be wherein a part of tax-control data be stored in the described processing unit, another part tax-control data is transferred to described storage unit.
2, movable storage device according to claim 1, it is characterized in that, described processing unit comprises: one first safe processor and one and second safe processor that is connected, wherein, described first safe processor stores first key and first identity information, and described second safe processor stores second key and second identity information.
3, movable storage device according to claim 2, it is characterized in that one of them signaling interface of described first safe processor or described first safe processor is connected with the output terminal of physical damage testing circuit, temperature detection, voltage detecting and frequency detection circuit respectively.
4, movable storage device according to claim 2 is characterized in that, connected mode between described first safe processor and second safe processor adopt USB, SPI, 7816 one of them.
5, movable storage device according to claim 4 is characterized in that, described storage unit is a direct storage chip.
6, movable storage device according to claim 4, it is characterized in that, described storage unit comprises: communication interface and storer, wherein said storer be a standard hard drive, SD card, USB flash disk one of them, described interface and storer integrate jointly.
7, movable storage device according to claim 1 is characterized in that, described communication unit use USB mode, PCI-E or UWB one of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820108699 CN201210325Y (en) | 2008-06-13 | 2008-06-13 | Mobile storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820108699 CN201210325Y (en) | 2008-06-13 | 2008-06-13 | Mobile storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201210325Y true CN201210325Y (en) | 2009-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200820108699 Expired - Lifetime CN201210325Y (en) | 2008-06-13 | 2008-06-13 | Mobile storage device |
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| CN (1) | CN201210325Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102968861A (en) * | 2010-03-10 | 2013-03-13 | 航天信息股份有限公司 | Tax copying method |
| CN104731522A (en) * | 2013-12-20 | 2015-06-24 | 慧荣科技股份有限公司 | Data storage device and data maintenance method thereof |
-
2008
- 2008-06-13 CN CN 200820108699 patent/CN201210325Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102968861A (en) * | 2010-03-10 | 2013-03-13 | 航天信息股份有限公司 | Tax copying method |
| CN102968861B (en) * | 2010-03-10 | 2015-07-15 | 航天信息股份有限公司 | Tax copying method |
| CN104731522A (en) * | 2013-12-20 | 2015-06-24 | 慧荣科技股份有限公司 | Data storage device and data maintenance method thereof |
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Granted publication date: 20090318 |
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| CX01 | Expiry of patent term |