CN204480283U

CN204480283U - A kind of safe read-write device based on RFID technique

Info

Publication number: CN204480283U
Application number: CN201520124803.8U
Authority: CN
Inventors: 朱富裕; 杨骏; 杨浩; 李涛
Original assignee: NANJING CHINA SCIENCE MICROELECTRONICS Co Ltd
Current assignee: NANJING CHINA SCIENCE MICROELECTRONICS Co Ltd
Priority date: 2015-03-03
Filing date: 2015-03-03
Publication date: 2015-07-15
Anticipated expiration: 2025-03-03

Abstract

The utility model provides a kind of safe read-write device based on RFID technique, comprise data are processed and store and to RFID radio frequency module for reading and writing send instruction micro control unit MCU, for data are encrypted and decrypted security module, read write command is modulated, send and to the echoed signal that label returns carry out the RFID radio frequency module for reading and writing of demodulation, the peripheral circuit be made up of connecting path between each module, for receiving and send antenna and the power module of signal; Described micro control unit MCU is connected with adopting ISO7816 protocol interface between described security module, adopts serial peripheral equipment interface SPI to be connected between described micro control unit with described RFID radio frequency module for reading and writing.Data safety and reliability in by read-write process, and structure is simple.

Description

A kind of safe read-write device based on RFID technique

Technical field

The utility model relates to field of radio frequency identification, especially a kind of ultrahigh frequency RFID safe read-write device based on the close SM7 algorithm of state.

Background technology

Radio-frequency (RF) identification (RFID) technology is a kind of wireless communication technology, to be read and write between related data recognition system and specific objective without the need to carrying out physical contact by radio signals identification specific objective.It is fast that RFID technique has sweep velocity, and discrimination is high; Volume is little, various shapes, can be applicable to dissimilar product; Can be used repeatedly, inside tags information can wipe, revise; Data accumulating capacity is large, can store mass data information; Contamination resistance is strong, has stronger repellence to materials such as water, oil and chemicalss; Penetrability is strong, has certain penetrability to nonmetal or nontransparent material; Security is high, can the advantage such as data message after storage encryption.RFID technique relies on its above advantage to be widely used in the fields such as industry, business, office, finance, military affairs.

But rfid interrogator security is in the market poor, and label information is easily stolen, and causes the safety problems such as privacy leakage.Security has become the bottleneck of restriction RFID development, and especially in the field that the security requirements such as finance are higher, the safety problem of RFID is particularly important.

Utility model content

The utility model, in order to solve the above-mentioned defect and deficiency that exist in prior art, provides a kind of safe read-write device based on RFID technique, data safety and reliability in by read-write process, and structure is simple.

For solving the problems of the technologies described above, the utility model provides a kind of safe read-write device based on RFID technique, comprise data are processed and store and to RFID radio frequency module for reading and writing send instruction micro control unit MCU, for data are encrypted and decrypted security module, read write command is modulated, send and to the echoed signal that label returns carry out the RFID radio frequency module for reading and writing of demodulation, the peripheral circuit be made up of connecting path between each module, for receiving and send antenna and the power module of signal; Described micro control unit MCU is connected with adopting ISO7816 protocol interface between described security module, adopts serial peripheral equipment interface SPI to be connected between described micro control unit with described RFID radio frequency module for reading and writing.

Preferably, the utility model also comprises RS-232 interface, and described RS-232 interface is used for being connected with computing machine.

Preferably, described power module is for directly to be powered by outside by plug.

Preferably, described power module is accumulator.

Preferably, described accumulator is connected with solar panels by wire.

Preferably, the utility model also comprises emergency power pack.

The Advantageous Effects that the utility model reaches:

The utility model by carrying out authentication with computing machine, certification pass through after data transmission procedure, use SM7 algorithm to encrypt and decrypt data, effectively ensure that the security of data, confidentiality and reliability.The utility model can also be encrypted the read write command of electronic tag, further increases the utility model security.In addition, the utility model forms simple, easy to use, can large-scale promotion use.

Accompanying drawing explanation

Fig. 1 the utility model parts composition and each parts annexation schematic diagram.

Embodiment

In order to the technique effect that auditor can better understand technical characteristic of the present utility model, technology contents and reach, now accompanying drawing of the present utility model is described in detail in conjunction with the embodiments.But shown accompanying drawing, just in order to better illustrate the technical solution of the utility model; be not actual proportions of the present utility model and best configuration; so, ask auditor not with regard to ratio and the configuration of accompanying drawing, limit claims of the present utility model.

Below in conjunction with drawings and Examples, the utility model patent is further illustrated.

As shown in Figure 1, the utility model provides a kind of safe read-write device based on RFID technique, comprise data are processed and store and to RFID radio frequency module for reading and writing send instruction micro control unit MCU, for data are encrypted and decrypted security module, read write command is modulated, send and to the echoed signal that label returns carry out the RFID radio frequency module for reading and writing of demodulation, the peripheral circuit be made up of connecting path between each module, for receiving and send antenna and the power module of signal; Described micro control unit MCU is connected with adopting ISO7816 protocol interface between described security module, adopts serial peripheral equipment interface SPI to be connected between described micro control unit with described RFID radio frequency module for reading and writing.

Power module described in the utility model is for directly to be powered by outside by plug or be storage battery power supply.In order to conservation of power resource, the utility model is also provided with solar panels, and solar panels are connected with accumulator by wire, not the used time, can be that charge in batteries uses for the utility model by solar panels.When occurring emergency case, when cannot ensure electric power supply, can have a strong impact on use of the present utility model, therefore the utility model also comprises emergency power pack, in case of need.

Utility model works frequency is 860-960MHZ, adopts the close SM7 algorithm of state, can read and write the electronic tag based on the close SM7 algorithm of state safely and effectively.Specific works flow process is as follows:

The safe read-write device based on RFID technique that the utility model provides is connected with computing machine by RS-232 interface, after successful connection, computing machine sends electronic tag instruction as controller to read write line, after read write line receives instruction, by micro control unit MCU, instruction is analyzed, decision instruction type.If when instruction is " the safe subarea of read write tag " type, then carry out authentication between read write line and electronic tag.Authentication between read write line and electronic tag is divided into two parts: one, electronic tag certification read write line; Two, read write line certification electronic tag.

One, electronic tag certification read write line: micro control unit MCU control RFID radio frequency module for reading and writing initiates ID authentication request to electronic tag.After electronic tag receives ID authentication request, production random number N 1, and be modulated into echoed signal and return to read write line.After read write line receives the echoed signal that electronic tag returns, carry out by RFID radio frequency module for reading and writing the random number N 1 that demodulation obtains electronic tag, meanwhile, random number N 1 is sent to micro control unit MCU by RFID radio frequency module for reading and writing.Micro control unit MCU controls security module and uses SM7 algorithm to be encrypted random number N 1, obtains encrypt file P1.Meanwhile, micro control unit MCU generates random number N 2, and by RFID radio frequency module for reading and writing, [P1, N2] is sent to electronic tag.After electronic tag receives [P1, the N2] of read write line transmission, use the SM7 algorithm of electronic tag inside to decipher encrypt file P1, obtain declassified document N1*, and judge that whether declassified document N1* is identical with random number N 1.If not identical, then authentification failure; If identical, then electronic tag certification read write line success.

Two, read write line certification electronic tag, when after the success of electronic tag certification read write line, electronic tag uses the SM7 algorithm of its inside to be encrypted random number N 2, obtains encrypt file P2, and encrypt file P2 is modulated into echoed signal returns to read write line.After read write line receives the echoed signal that electronic tag returns, use RFID radio frequency module for reading and writing to carry out demodulation and obtain encrypt file P2, meanwhile, the encrypt file P2 that demodulation obtains by RFID radio frequency module for reading and writing sends to micro control unit MCU.Micro control unit MCU controls security module and uses SM7 algorithm to be decrypted encrypt file P2, and obtain declassified document N2*, meanwhile, micro control unit MCU judges that whether declassified document N2* is equal with random number N 2.If unequal, then authentification failure; If equal, then read write line certification electronic tag success.

In addition, the utility model can also be encrypted the read write command of electronic tag.Detailed process is: between read write line and electronic tag after authentication success, micro control unit MCU controls security module and is encrypted electronic label read-write instruction, then control RFID radio frequency module for reading and writing is by the quality modulation after encryption in the frequency of operation of RFID radio frequency module for reading and writing, sends to electronic tag through antenna.After electronic tag receives the read write command after encryption, use the SM7 algorithm of its inside to be decrypted instruction, and respond according to instruction type, then become echoed signal to issue read write line the Data Modulation of response.The RFID radio frequency module for reading and writing of read write line carries out demodulation to echoed signal, extracts the response data that electronic tag returns, return to micro control unit MCU by SPE interface after receiving by antenna the echoed signal that electronic tag returns.Micro control unit MCU controls security module and uses SM7 algorithm to be decrypted response data, and the data after deciphering are sent to computing machine by RS-232 interface.

Below disclose the utility model with preferably embodiment, so itself and be not used to limit the utility model, allly take equivalent replacement or technical scheme that the scheme of equivalent transformation obtains, all drop in protection domain of the present utility model.

Claims

1., based on a safe read-write device for RFID technique, it is characterized in that:

Comprise data are processed and store and to RFID radio frequency module for reading and writing send instruction micro control unit MCU, for data are encrypted and decrypted security module, read write command is modulated, send and to the echoed signal that label returns carry out the RFID radio frequency module for reading and writing of demodulation, the peripheral circuit be made up of connecting path between each module, for receiving and send antenna and the power module of signal; Described micro control unit MCU is connected with adopting ISO7816 protocol interface between described security module, adopts serial peripheral equipment interface SPI to be connected between described micro control unit with described RFID radio frequency module for reading and writing.

2. the safe read-write device based on RFID technique according to claim 1, is characterized in that: also comprise RS-232 interface, and described RS-232 interface is used for being connected with computing machine.

3. the safe read-write device based on RFID technique according to claim 1, is characterized in that: described power module is for directly to be powered by outside by plug.

4. the safe read-write device based on RFID technique according to claim 1, is characterized in that: described power module is accumulator.

5. the safe read-write device based on RFID technique according to claim 4, is characterized in that: described accumulator is connected with solar panels by wire.

6. the safe read-write device based on RFID technique according to claim 1, is characterized in that: also comprise emergency power pack.