CN103220135B - There is the IC-card intelligent gas meter of information security management function - Google Patents
There is the IC-card intelligent gas meter of information security management function Download PDFInfo
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- CN103220135B CN103220135B CN201310114397.2A CN201310114397A CN103220135B CN 103220135 B CN103220135 B CN 103220135B CN 201310114397 A CN201310114397 A CN 201310114397A CN 103220135 B CN103220135 B CN 103220135B
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Abstract
The invention discloses a kind of IC-card intelligent gas meter with information security management function, belong to a kind of IC-card intelligent gas meter, described IC-card intelligent gas meter comprises IC-card intelligent gas meter terminal master controller and FLASH memory, and described IC-card intelligent gas meter terminal master controller is by external data interface access IC card information Switching Module; Described external data interface communicates with the unique data between IC card information Switching Module for performing IC-card intelligent gas meter terminal master controller; By increasing the function of information security management in IC-card intelligent gas meter terminal master controller, authentication is carried out when making it carry out exchanges data by the gas management system of selling of IC card information Switching Module and gas company, ensure that the legitimacy of both communication, and can seamless access civil gas management system by external data interface, realize the dispersion manufacture of IC-card intelligent gas meter, unified management, and ensure that the independence of gas company on gas meter, flow meter controls, not by extraneous restriction.
Description
Technical field
The present invention relates to a kind of IC-card intelligent gas meter, in particular, the present invention relates generally to a kind of IC-card intelligent gas meter with information security management function.
Background technology
At present, each gas company mostly all uses IC-card intelligent gas meter and sells gas management system and carries out service management, gas company by IC-card as media, realize pre-payment and related management, but due to the off-line data characteristic of IC-card, make table end and sell gas management system often to occur data disunity, the security management of transfer of data does not ensure, password may be caused time serious to be decrypted, can realize departing from gas company technically to sell gas management system and carry out selling gas, loss is brought to gas company, gas company also exists IC-card intelligent gas meter risk out of control.
Taking IC-card as the IC-card intelligent gas meter of transmission medium and selling in gas management system, if IC-card intelligent gas meter does not possess information security management function, data can not get validity check, IC-card intelligent gas meter, IC-card may be caused, to sell the information of gas management system three inconsistent, such as, load value data makes a mistake, and brings loss can to user or gas company.When IC-card intelligent gas meter does not possess information security management function, the encryption of data, deciphering can not get ensureing, because IC-card belongs to the data transmission media of off-line, disabled user can obtain easily, and by corresponding technological means, obtains the data analysis in IC-card, breaking encryption algorithm and data protocol, thus write out the program of corresponding cooperation IC-card intelligent gas meter use, the management system departing from gas company uses gas arbitrarily, causes gas company to suffer economic loss.
On the other hand, the management system of the IC-card intelligent gas meter needs of different brands, operating equipment, transmission medium, management password, modes of operation etc. are all not identical, if IC-card intelligent gas meter inside does not have information security management function, not unified interface and program of carrying out exchanges data with outside, unified management cannot be accomplished by gas company, IC-card intelligent gas meter can depart from the management system of gas company, information is arbitrarily modified, using state is controlled, certain user specific or multiple user need not be paid and just can use combustion gas, gas company also exists IC-card intelligent gas meter and management system risk simultaneously out of control.Therefore be necessary for the problems referred to above, further improvement done to existing IC-card intelligent gas meter, realizes information security management.
Summary of the invention
An object of the present invention is to solve above-mentioned deficiency, a kind of IC-card intelligent gas meter with information security management function is provided, to expect the problem that the information security management solving IC-card intelligent gas meter and management system thereof in prior art can not be guaranteed, eliminate the risk of information security management in gas company's operation.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
A kind of IC-card intelligent gas meter with information security management function provided by the present invention, described IC-card intelligent gas meter comprises IC-card intelligent gas meter terminal master controller and FLASH memory, and described IC-card intelligent gas meter terminal master controller is by external data interface access IC card information Switching Module; Described external data interface communicates with the unique data between IC card information Switching Module for performing IC-card intelligent gas meter terminal master controller, transmits it to IC-card intelligent gas meter terminal master controller when receiving the external data coming from IC card information Switching Module; Described FLASH memory is for storing in IC-card intelligent gas meter the control and documentor that supply IC-card intelligent gas meter terminal master controller to call; Described IC-card intelligent gas meter terminal master controller is used for when receiving the external data coming from external data interface, authentication is carried out to the gas management system of selling of write external data, judge whether to obtain the encrypted packets in this external data, when judged result is legal, then perform the operation of corresponding table end according to the affairs that comprise in packet, otherwise then to be resetted initial condition by reset circuit.
As preferably, further technical scheme is: described IC-card intelligent gas meter terminal master controller is also for when sell the identity of gas management system when certification be legal, then decrypted data packet being verified by the integrality of data check module to data, on the contrary then to be resetted initial condition by reset circuit; After data integrity verifying passes through, verified by the validity of data check module to data, otherwise then to be resetted initial condition by reset circuit; After Validation of Data is passed through, preliminary treatment is carried out to the affairs comprised in data, and generate return information for pre-processed results, IC card information Switching Module is returned to by external data interface by after described return information encryption, when then pre-processed results being approved after the effective confirmation obtaining IC card information Switching Module and storing relevant operation information, and perform in pre-processed results and operate accordingly; Otherwise then abandon pre-processed results or make caching process.
Further technical scheme is: described FLASH memory Nei Yu Ge protocols having restrictive condition and multiple different cipher key procedures, for when IC-card intelligent gas meter carries out exchanges data from different gas management systems of selling respectively, IC-card intelligent gas meter terminal master controller according to the encryption key of external data compared with multiple cipher key procedures of Ge pre-in FLASH memory, thus the identity of gas management system is sold in certification, and after encrypted packets deciphering and completeness check are passed through, according to agreement restrictive condition, by data check module verification data in current validity of selling under gas management system identity, judge whether to carry out preliminary treatment to the affairs in data.
Further technical scheme is: also comprise eeprom memory in described IC-card intelligent gas meter, for storing the associative operation information of IC-card intelligent gas meter terminal master controller, and IC-card intelligent gas meter terminal master controller is to the pre-processed results of affairs in external data.
Further technical scheme is: described IC-card intelligent gas meter terminal master controller is central processing unit or the single-chip microcomputer that can perform cryptographic algorithm.
Further technical scheme is: described external data interface be at least in the middle of USART serial line interface, SPI serial line interface or I2C serial line interface any one.
Further technical scheme is: also comprise encrypting module in described IC-card intelligent gas meter, for to IC-card intelligent gas meter terminal master controller with sell the multistage encryption and decryption that gas management system data exchanges, and the data encryption key that gas management system is sold in auxiliary IC-card intelligent gas meter terminal master controller acquisition carries out authentication.
Further technical scheme is: described encrypting module is by the Advanced Encryption Standard in AES(cryptography, the abbreviation of English Advanced Encryption Standard) or the triple DEA of 3DES(, English Triple Data Encryption Algorithm) mode carry out data encrypting and deciphering.
Further technical scheme is: also comprise mechanical Ji Liang Zhuan Ge and signal pre-processing circuit in described IC-card intelligent gas meter, at least be provided with electromechanical valve in described mechanical meter amount dress Ge to turn to change with dynamoelectric signal and fill Ge, described dynamoelectric signal turns to change and fills Ge and access IC-card intelligent gas meter terminal master controller by signal pre-processing circuit; Described electromechanical valve is by electromechanical valve control circuit access IC-card intelligent gas meter terminal master controller.
Further technical scheme is: also comprise display circuit, crystal oscillating circuit and download program mouth in described IC-card intelligent gas meter, described display circuit, crystal oscillating circuit and download program mouth all access IC-card intelligent gas meter terminal master controller, wherein: described IC-card intelligent gas meter terminal master controller accesses LCDs by display circuit, for the Various types of data information of IC-card intelligent gas meter being presented in LCDs; Described crystal oscillating circuit is used for providing clock signal to IC-card intelligent gas meter terminal main controller; Described download program mouth is used for relevant program to be downloaded in FLASH memory by IC-card intelligent gas meter terminal master controller, real-time upgrading cipher key procedures.
Compared with prior art, one of beneficial effect of the present invention is: by increasing the function of information security management in IC-card intelligent gas meter terminal master controller, authentication is carried out when making it carry out exchanges data by the gas management system of selling of IC card information Switching Module and gas company, ensure that the legitimacy of both communication, IC-card intelligent gas meter could must be communicated with IC card information Switching Module by external data interface; Utilize different keys can realize the Quan Xian She Ge of gas company's differentiated control, and adopt 3DES/AES multi-level encryption mode, make the fail safe of key higher, and by upgrade key during download program cause for gossip on IC-card intelligent gas meter, avoid the risk that key exposure brings; The data verifying program module of Tong Guo Nei Ge, ensures that the data of transmission are true, accurate and complete.Simultaneously a kind of IC-card intelligent gas list structure with information security management function provided by the present invention is simple, can seamless access civil gas management system by external data interface, realize the dispersion manufacture of IC-card intelligent gas meter, unified management, range of application is wide, and ensure that the independence of gas company on gas meter, flow meter controls, not by extraneous restriction.
Accompanying drawing explanation
Fig. 1 is for illustration of the information security management structural schematic block diagram in one embodiment of the invention;
Fig. 2 is the structural schematic block diagram for illustration of another embodiment of the present invention;
Fig. 3 is for illustration of the management system block diagram in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated.
Shown in figure 1, one embodiment of the present of invention are a kind of IC-card intelligent gas meters with information security management function, need in this IC-card intelligent gas meter to establish Ge to have IC-card intelligent gas meter terminal master controller and FLASH memory, and IC-card intelligent gas meter terminal master controller is by the IC card information Switching Module of external data interface access table end;
Said external data-interface communicates with the unique data between IC card information Switching Module for performing IC-card intelligent gas meter terminal master controller, transmits it to IC-card intelligent gas meter terminal master controller when receiving the external data coming from IC card information Switching Module;
Above-mentioned FLASH memory is for storing in IC-card intelligent gas meter the control and documentor that supply IC-card intelligent gas meter terminal master controller to call;
Above-mentioned IC-card intelligent gas meter terminal master controller is used for when receiving the external data coming from external data interface, authentication is carried out to the gas management system of selling of write external data, judge whether to obtain the encrypted packets in this external data, when judged result is legal, then deciphers and operate according to the corresponding table end of the affairs execution comprised in packet; Otherwise then to be resetted initial condition by reset circuit.
According to above-mentioned technical scheme, the technical problem that the present embodiment solves be by above-mentioned functions IC-card intelligent gas meter terminal master controller, first that carries out exchanges data at itself and external data interface carries out authentication and data encrypting and deciphering in advance, thus coordinate the IC-card intelligent gas meter of gas company to terminal to manage, to eliminate the risk of information security management in gas company's operation.
Shown in figure 2, in another embodiment of the invention, in conjunction with in this area about the known technology of IC-card intelligent gas meter, also should She Ge machinery Ji Liang Zhuan Ge and signal pre-processing circuit in above-mentioned IC-card intelligent gas meter, and mechanical Ji Liang Zhuan Ge is provided with combustion gas input port and combustion gas delivery outlet, and its inside is at least provided with electromechanical valve and dynamoelectric signal turns to change and fill Ge, wherein dynamoelectric signal turns and changes dress Ge by signal pre-processing circuit access IC-card intelligent gas meter terminal master controller; Electromechanical valve is then by electromechanical valve control circuit access IC-card intelligent gas meter terminal master controller, IC-card intelligent gas meter terminal master controller controls the switch motion of electromechanical valve by electromechanical valve control circuit, is namely made up of the valve control module in IC-card intelligent gas meter electromechanical valve and electromechanical valve control circuit.
Shown in Fig. 1, further, Hai Ke She Ge display circuit, crystal oscillating circuit and download program mouth in above-mentioned IC-card intelligent gas meter, described display circuit, crystal oscillating circuit and download program mouth all access above-mentioned IC-card intelligent gas meter terminal master controller, wherein: described IC-card intelligent gas meter terminal master controller accesses LCDs by display circuit, it act as and the Various types of data information of IC-card intelligent gas meter is presented in LCDs, and the information presented such as remains tolerance, switch valve state etc.; Described crystal oscillating circuit is used for providing clock signal to IC-card intelligent gas meter terminal main controller, and VCC and VSS two pins provides working power for IC-card intelligent gas meter; And relevant program is downloaded in FLASH memory by IC-card intelligent gas meter terminal master controller by acting as of download program mouth, real-time upgrading cipher key procedures, avoids the risk because key exposure brings.
Mention as above-described embodiment, the present invention is except information security management function, it is in fact a kind of IC-card intelligent gas meter with information security management function, it take IC-card as transmission medium, to sell gas management system for platform, based on displacement machine measurement technology, by the combination of electronic-metering technology, data-collection technology, valve control techniques, data processing technique, combination technique, realize the gas meter, flow meter of the related management such as electronic measurement, valve control, prepaid.
Shown in Fig. 1, in the embodiment that the present invention is more preferably for technical solution problem, there is provided a kind of above-mentioned IC-card intelligent gas meter terminal master controller to selling the concrete mode that gas management system carries out authentication, data check and affairs perform, namely when the identity that gas management system is sold in the certification of IC-card intelligent gas meter terminal master controller is legal, then decrypted data packet being verified by the integrality of data check module to data, on the contrary then to be resetted initial condition by reset circuit;
After data integrity verifying passes through, then verified by the validity of data check module to data, otherwise then to be resetted initial condition by reset circuit;
After Validation of Data is passed through, preliminary treatment is carried out to the affairs comprised in data, and generate return information for pre-processed results, IC card information Switching Module is returned to by external data interface by after described return information encryption, when then pre-processed results being approved after the effective confirmation obtaining IC card information Switching Module and storing relevant operation information, thus operate accordingly in execution pre-processed results; Otherwise then abandon pre-processed results or make caching process, be specially the confirmation result that IC-card intelligent gas meter terminal master controller does not receive IC card information Switching Module within the time preset, in three minutes, such as do not receive the confirmation of IC card information Switching Module, then reset initial condition; Aforesaid caching process refers to keeps in pre-processed results instruction, when IC-card intelligent gas meter terminal master controller is again waken up and receives the confirmation of IC card information Switching Module, then performs in pre-processed results in the same way and operates accordingly.
Contain the present embodiment peripheral data in above-mentioned technical scheme and authenticate to the whole flow process of affairs performed by IC-card intelligent gas meter terminal master controller external data from selling gas management system identity, establish Ge by the Cheng Xu of above-mentioned flow process, further enhance IC-card intelligent gas meter to the fail safe receiving information and executing.And the above-mentioned IC-card intelligent gas meter terminal master controller reset initial condition repeatedly mentioned, be reset IC-card intelligent gas meter terminal master controller and perform the state before any one operation above-mentioned, such as IC-card intelligent gas meter terminal master controller is resting state receiving the external data state of carrying out before authentication, be waken up by resting state when receiving external data, but when being judged as illegal to the authentication of selling gas management system, IC-card intelligent gas meter terminal master controller then recovers resting state by reset circuit, do not carry out any operation, in other step, the situation of processor reset also substantially as hereinbefore, and reset circuit also can be considered a chip virtual module in IC-card intelligent gas meter terminal master controller in the present invention, when failing the authentication, operation note can be stored by IC-card intelligent gas meter terminal master controller, checks so that follow-up.
As mentioned here above, by above-mentioned display circuit and LCDs, and the display driving software of IC-card intelligent gas meter terminal master controller inside forms the display module in IC-card intelligent gas meter jointly, display module is passive by IC-card intelligent gas meter terminal main controller controls, shows relevant table client information by LCDs.
In another embodiment of the invention, for realizing being managed by the IC-card intelligent gas meter of different rights to user terminal, need Nei above-mentioned FLASH memory Yu Ge agreement restrictive condition and multiple different cipher key procedures, and above-mentioned control and documentor can think the general name of agreement restrictive condition and multiple different cipher key procedures, it act as when IC-card intelligent gas meter carries out exchanges data from different gas management systems of selling respectively, IC-card intelligent gas meter terminal master controller according to the encryption key of external data compared with multiple cipher key procedures of Ge pre-in FLASH memory, thus the identity of gas management system is sold in certification, and after encrypted packets deciphering and completeness check are passed through, according to agreement restrictive condition, by data check module verification data in current validity of selling under gas management system identity, judge whether to carry out preliminary treatment to the affairs in data.
According to another embodiment of the present invention, as mentioned here above, for ease of the buffer memory of IC-card intelligent gas meter terminal master controller pre-processed results, the eeprom memory that Hai Ke She Ge is relatively independent in IC-card intelligent gas meter, for storing the associative operation information of IC-card intelligent gas meter terminal master controller, and IC-card intelligent gas meter terminal master controller is to the pre-processed results of affairs in external data.And in FLASH memory, also establish Ge to have other program that can be utilized by IC-card intelligent gas meter terminal master controller, such as make the associative operation information of IC-card intelligent gas meter terminal master controller once be stored to after in eeprom memory, can not be deleted with amendment, to make the running status of IC-card intelligent gas meter leave complete record.
On the other hand, the FLASH memory mentioned in the present embodiment and eeprom memory can independent of IC-card intelligent gas meter terminal master controllers, also directly can be integrated in IC-card intelligent gas meter terminal master controller, be divided by concrete chip and establish Ge to play above-mentioned memory function.
Shown in figure 1, above-mentioned IC-card intelligent gas meter terminal master controller of having mentioned can carry out encryption and decryption to the data from IC card information Switching Module, in an alternative embodiment of the invention, also can direct Dan Dushe Ge encrypting module in IC-card intelligent gas meter, this encrypting module can be independently, also can the form of software program be stored in FLASH memory, it act as and carries out multistage encryption and decryption to IC-card intelligent gas meter terminal master controller and the exchanges data of selling gas management system, and auxiliary IC-card intelligent gas meter terminal master controller obtains the data encryption key selling gas management system from external data carries out authentication.With reference to the cipher mode that fail safe in prior art is higher, Advanced Encryption Standard in preferred employing AES(cryptography, the abbreviation of English Advanced Encryption Standard) or the triple DEA of 3DES(, English TripleData Encryption Algorithm) carry out encryption and decryption to by the data of coming and going in external data interface.
According to the form that above-mentioned encrypting module exists in IC-card intelligent gas meter, the data check module in the above embodiment of the present invention is also identical situation, and namely it can be independently, also can the form of software program be stored in FLASH memory.
Further, in another embodiment of the invention, above-mentioned IC-card intelligent gas meter terminal master controller is the core of whole IC-card intelligent gas meter, the function such as control, execution, reset of being correlated with is realized with this, perform relevant program command, coordinate to work in order, efficiently between each functional module.For IC-card intelligent gas meter terminal master controller itself, directly can adopt in prior art and can perform cryptographic algorithm or with the single-chip microcomputer of ready-made cryptographic algorithm or central processing unit.
Simultaneously, in above-described embodiment the external data interface of IC-card intelligent gas meter terminal master controller preferably and conventional outside data transmission interface match, the serial line interfaces such as such as USART interface, SPI interface or I2C interface, to increase the compatibility of IC-card intelligent gas meter terminal master controller and IC card information Switching Module.
Have in the IC-card intelligent gas meter practical application of information security management function in above-described embodiment, be as good as with existing IC-card intelligent gas meter.As Fig. 1, illustrated in fig. 2, IC-card intelligent gas meter terminal master controller, according to the operational order of external data, completes the information exchange with IC card information Switching Module.IC-card intelligent gas meter terminal master controller realizes electromechanical valve switch motion by electromechanical valve control circuit, display circuit is by electromechanical valve state, supplement tolerance with money, residue tolerance etc. information presents in LCDs, mechanical count signal is converted to the signal of telecommunication by dynamoelectric signal Zhuan Huan Zhuan Ge, transfer in IC-card intelligent gas meter terminal master controller by signal pre-processing circuit, tolerance value in memory and the gas consumption value received by counting module are made mathematic interpolation by IC-card intelligent gas meter terminal master controller, and tolerance remaining sum is presented in LCDs, when the balance depletion of supplementing with money in subscriber's meter, IC-card intelligent gas meter terminal master controller controls the electromechanical valve in mechanical meter amount dress Ge by electromechanical valve control circuit, make it turn off, and then stopping air feed, reopen after user successfully supplements with money.
Shown in figure 3, there is use after the IC-card intelligent gas meter of information security management function, the outside all communication datas of IC-card intelligent gas meter are all undertaken by external data interface, by IC-card intelligent gas meter terminal master controller by the laggard row relax of encrypting module encryption and decryption, and the interface that IC-card intelligent gas meter terminal master controller carries out exchanges data with outside and internal processes are unique, therefore sell gas management system and IC-card intelligent gas meter terminal master controller can be considered as terminal, in order to manage IC-card intelligent gas meter, namely sell gas management system compatible various brand with one, the IC-card intelligent gas meter of type is managed concentratedly, effective reduction gas company is to different brands in region, the difficulty of type gas meter, flow meter integration management.
Than that described above, also it should be noted that spoken of in this manual " embodiment ", " embodiment ", " embodiment " etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place goes out statement of the same race is not in the description necessarily refer to same embodiment.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is to realize this feature structure or feature also falls within the scope of the invention in conjunction with other embodiments.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here,
This understanding, those skilled in the art can design a lot of other amendment and execution mode, these revision for execution modes will drop within spirit disclosed in the present application and spirit.More particularly, open in the application, in the scope of accompanying drawing and claim, multiple modification and improvement can be entered to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, for skilled person, other purposes also will be obvious.
Claims (9)
1. one kind has the IC intelligent gas meter of information security management function, it is characterized in that: described IC intelligent gas meter comprises IC intelligent gas meter terminal master controller and FLASH memory, described IC intelligent gas meter terminal master controller is by external data interface access IC card information Switching Module;
Described external data interface communicates with the unique data between IC card information Switching Module for performing IC intelligent gas meter terminal master controller, transmits it to IC intelligent gas meter terminal master controller when receiving the external data coming from IC card information Switching Module;
Described FLASH memory is for storing in IC intelligent gas meter the control and documentor that supply IC intelligent gas meter terminal master controller to call;
Described IC intelligent gas meter terminal master controller is used for when receiving the external data coming from external data interface, authentication is carried out to the gas management system of selling of write external data, judge whether to obtain the encrypted packets in this external data, when judged result is legal, then decrypted data packet being verified by the integrality of data check module to data, on the contrary then to be resetted initial condition by reset circuit;
After data integrity verifying passes through, verified by the validity of data check module to data, otherwise then to be resetted initial condition by reset circuit;
After Validation of Data is passed through, preliminary treatment is carried out to the affairs comprised in data, and generate return information for pre-processed results, IC card information Switching Module is returned to by external data interface by after described return information encryption, when then pre-processed results being approved after the effective confirmation obtaining IC card information Switching Module and storing relevant operation information, and perform in pre-processed results and operate accordingly; Otherwise then abandon pre-processed results or make caching process.
2. the IC intelligent gas meter with information security management function according to claim 1, it is characterized in that: in described FLASH memory, preset agreement restrictive condition and multiple different cipher key procedures, for when IC intelligent gas meter carries out exchanges data from different gas management systems of selling respectively, IC intelligent gas meter terminal master controller according to the encryption key of external data compared with multiple cipher key procedures preset in FLASH memory, thus the identity of gas management system is sold in certification, and after encrypted packets deciphering and completeness check are passed through, according to agreement restrictive condition, by data check module verification data in current validity of selling under gas management system identity, judge whether to carry out preliminary treatment to the affairs in data.
3. the IC intelligent gas meter with information security management function according to claim 1, it is characterized in that: in described IC intelligent gas meter, also comprise eeprom memory, for storing the associative operation information of IC intelligent gas meter terminal master controller, and IC intelligent gas meter terminal master controller is to the pre-processed results of affairs in external data.
4. the IC intelligent gas meter with information security management function according to claim 1, is characterized in that: described IC intelligent gas meter terminal master controller is central processing unit or the single-chip microcomputer that can perform cryptographic algorithm.
5. the IC intelligent gas meter with information security management function according to claim 1, is characterized in that: described external data interface be at least in the middle of USART serial line interface, SPI serial line interface or I2C serial line interface any one.
6. the IC intelligent gas meter with information security management function according to claim 1, it is characterized in that: in described IC intelligent gas meter, also comprise encrypting module, for carrying out multistage encryption and decryption to IC intelligent gas meter terminal master controller and the exchanges data of selling gas management system, and auxiliary IC intelligent gas meter terminal master controller obtains the data encryption key selling gas management system from external data carries out authentication.
7. the IC intelligent gas meter with information security management function according to claim 6, is characterized in that: described encrypting module carries out data encrypting and deciphering by the mode of AES or 3DES.
8. the IC intelligent gas meter with information security management function according to claim 1, it is characterized in that: in described IC intelligent gas meter, also comprise mechanical metering device and signal pre-processing circuit, at least be provided with electromechanical valve and electromechanical signal conversion device in described mechanical metering device, described electromechanical signal conversion device is by signal pre-processing circuit access IC intelligent gas meter terminal master controller; Described electromechanical valve is by electromechanical valve control circuit access IC intelligent gas meter terminal master controller.
9. the IC intelligent gas meter with information security management function according to claim 1 or 8, it is characterized in that: in described IC intelligent gas meter, also comprise display circuit, crystal oscillating circuit and download program mouth, described display circuit, crystal oscillating circuit and download program mouth all access IC intelligent gas meter terminal master controller, wherein: described IC intelligent gas meter terminal master controller accesses LCDs by display circuit, for the Various types of data information of IC intelligent gas meter being presented in LCDs; Described crystal oscillating circuit is used for providing clock signal to IC intelligent gas meter terminal main controller; Described download program mouth is used for relevant program to be downloaded in FLASH memory by IC intelligent gas meter terminal master controller, real-time upgrading cipher key procedures.
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