CN102254261A - Instantaneous consumption application processing method and system for intelligent card - Google Patents
Instantaneous consumption application processing method and system for intelligent card Download PDFInfo
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- CN102254261A CN102254261A CN 201110201093 CN201110201093A CN102254261A CN 102254261 A CN102254261 A CN 102254261A CN 201110201093 CN201110201093 CN 201110201093 CN 201110201093 A CN201110201093 A CN 201110201093A CN 102254261 A CN102254261 A CN 102254261A
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Abstract
The invention discloses an instantaneous consumption application processing method for an intelligent card. The instantaneous consumption application processing method comprises the steps of: consumption initialization: a terminal safety control module is used for calculating a temporary session key and a consumption ciphertext according to the random number taking response data obtained by a terminal from a card and a preset encryption rule; consumption instruction checking: the card receives the instantaneous consumption instruction sent from the terminal, and then checks the trading key data of the instantaneous consumption instruction and verifying the consumption ciphertext; and consumption instruction processing: after the trading key data checking and consumption ciphertext validation are passed, the consumption is processed. The invention also discloses a corresponding instantaneous consumption processing system for the intelligent card. The instantaneous consumption application processing method and system for the intelligent card can be used for increasing the instantaneous trading speed and ensuring the safety, reliability and stability of trading simultaneously, and meet the requirements of various high-speed consumption occasions.
Description
Technical field
The present invention relates to smart card application technologies, relate in particular to instantaneous consumer applications disposal route of a kind of smart card and system.
Background technology
Along with the fast development of smart card (being card) technology, its application is more and more broader, particularly with the large-scale application of electronic money form in public transport, consumer field.Meanwhile, security and the speed of card in process of exchange also there is more and more higher requirement.The smart card that uses in traffic, consumer field substantially all is to follow PBOC wallet/bankbook using standard at present, the transaction flow and the instruction of card and terminal when this standard has clearly been stipulated transaction, its roughly flow process be: card is carried out consumption initialization, terminal and is produced the value of button consumption behind the verification of consumer sale critical data, the card matching data check.Its encryption key data algorithm adopts general DES algorithm at present.
From the technical point of view, consumer sale flow process in existing P BOC wallet/bankbook using standard and instruction only can be satisfied the transactions demand in the certain hour scope, as are generally 100ms.Yet, in a lot of practical application, as the non-parking charge of the current at a high speed scene of traffic and mobile payment scene etc., all transaction and withhold and all need finish when carrying out instantaneous consumption in moment, what also will guarantee simultaneously to conclude the business is safe and reliable.According to existing using standard, card and terminal room must have 4 alternately when transaction, each step is all occupied certain hour, form and accumulate the exchange hour that extended, if compression transaction flow and reduced instruction can influence security, the reliability and stability of transaction again, thus occur that smart card speed when instantaneous consumer sale promotes and safe and reliable between contradiction.Thereby existing consumer applications treatment scheme can not satisfy the requirement of instantaneous consumption occasion.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of smart card instantaneous consumer applications disposal route, this method can guarantee security, the reliability and stability of transaction when promoting instantaneous transactions velocity.
The further technical matters to be solved of the present invention is: provide a kind of smart card instantaneous consumer applications disposal system, this system can guarantee security, the reliability and stability of transaction when promoting instantaneous transactions velocity.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
The instantaneous consumer applications disposal route of a kind of smart card may further comprise the steps:
The consumption initialization step, the terminal security control module is got the random number response data according to terminal from what card obtained, calculates interim conversation key and consumption ciphertext according to default encryption rule;
After consumption order checking procedure, card are received the instantaneous consumption order of terminal transmission, check the transaction critical data of this instantaneous consumption order, and described consumption ciphertext is carried out verification;
The consumption order treatment step after the inspection of described transaction critical data and consumption ciphertext verification are passed through, is carried out consumption and is handled.
Preferably, described consumption order checking procedure specifically includes:
The consumption order forwarding step, terminal is sent instantaneous consumption order to card;
Consumption information is checked step, after card receives described instantaneous consumption order, checks the critical data information of card stored, and described critical data information comprises the amount of money, key information at least;
Consumption ciphertext checking procedure, after described critical data information check passed through, the described consumption ciphertext of verification if verification is passed through, was then carried out described consumption order treatment step.
Preferably, described consumption order treatment step specifically includes:
The step of withholing, card is carried out the processing of withholing;
Produce the certificate of fair step, card produces certificate of fair according to described consumption ciphertext and transaction data;
The critical data step of updating, the remaining sum of renewal card.
Preferably, after described generation certificate of fair step, also comprise:
Certificate of fair verification step, terminal security control module are verified the certificate of fair that described card produces, and are carried out corresponding operating according to the checking result.
Preferably, it is characterized in that described consumption initialization step comprises:
Get random number request forwarding step, terminal sends the random number request of getting to card;
Get the random number request processing step, card receives that terminal sends get the random number request after, produce the pseudo random number of a default byte length, return the response data that comprises described pseudo random number to described terminal;
Consumption cryptogram computation step after the terminal security control module obtains described response data from terminal, produces the interim conversation key and calculates the consumption ciphertext according to default encryption rule.
Correspondingly, the invention also discloses the instantaneous consumer applications disposal system of a kind of smart card, include:
The consumption initialization unit is arranged on the terminal security control module, is used for getting the random number response data according to terminal from what card obtained, calculates interim conversation key and consumption ciphertext according to default encryption rule;
The consumption order verification unit is arranged on Card-terminal, is used for checking the transaction critical data of this instantaneous consumption order after receiving the instantaneous consumption order that terminal sends, and described consumption ciphertext is carried out verification;
The consumption order processing unit is arranged on Card-terminal, after the inspection of described transaction critical data and consumption ciphertext verification are passed through, carries out consumption and handles.
Preferably, described consumption order verification unit includes:
The consumption order transmitting element is arranged on terminal, is used for sending instantaneous consumption order to card;
The consumption information inspection unit is arranged on Card-terminal, is used for after receiving described instantaneous consumption order, checks the critical data information of card stored, and described critical data information comprises the amount of money, key information at least;
Consumption ciphertext verification unit links to each other with described consumption information inspection unit, is used for after described critical data information check passes through, and the described consumption ciphertext of verification if verification is passed through, then sends enabling signal to described consumption order processing unit.
Preferably, described consumption order processing unit includes:
The unit of withholing is used for carrying out the processing of withholing;
Produce the certificate of fair unit, be used for producing certificate of fair according to described consumption ciphertext and transaction data;
The critical data updating block is used to upgrade the remaining sum of card.
Preferably, described generation certificate of fair unit also is connected with:
The certificate of fair authentication unit is arranged on the terminal security control module, is used for the certificate of fair that described card produces is verified, and carries out corresponding operating according to the checking result.
Preferably, described consumption initialization unit includes:
Get the random number request transmitting unit, be arranged on terminal, be used for sending the random number request of getting to card;
Get the random number requesting processing, be arranged on Card-terminal, be used for receive described get that the random number request transmitting unit sends get the random number request after, produce the pseudo random number of a default byte length, return the response data that comprises described pseudo random number to described terminal;
Consumption cryptogram computation unit is arranged on the terminal security control module, after being used for obtaining described response data from terminal, produces the interim conversation key and calculates the consumption ciphertext according to default encryption rule.
The invention has the beneficial effects as follows:
Embodiments of the invention by obtain in terminal card get the random number response data time, PSAM promptly goes out interim conversation key and consumption ciphertext according to the data computation that obtains, thereby pre-consumer phase at card, promptly the enciphered data that needs of exchange has all set been saved the time for entering consumer phase fast under the prerequisite that guarantees security; And in the card real consumption stage, the checking transaction data that consumption initialization and two steps of consumption of existing P BOC wallet consumption are finished, to withhold, generate the transaction verification code optimization be that a step is finished, and further saved exchange hour; Adopted the CBC-DES algorithm on the cryptographic algorithm, strengthened data encryption intensity, generated the certificate of fair of 8 bytes simultaneously, sensitive datas such as the dealing money in the transaction, type of transaction, exchange hour are all interrelated and prevent with ciphertext form transmission that transaction data from forging and guarantee transaction security.
Optimization trading instruction contents processing and data encryption algorithm adjustment by above transaction step, thereby reduced the processing time of Card-terminal, solved smart card required steps necessary and time loss of causing and simplify the contradictory problems of the security deficiency that transaction flow and instruction bring when carrying out the ordinary consumption flow process for adapting to instantaneous consumption, realized card under the off line environment fast and finish transaction safely and use to adapt to instantaneous consumption scene.
The present invention is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the realization flow figure of an embodiment of the instantaneous consumer applications disposal route of smart card of the present invention.
Fig. 2 is the composition structural drawing of an embodiment of the instantaneous consumer applications disposal system of smart card of the present invention.
Embodiment
Describe the embodiment that the instantaneous consumer applications of smart card of the present invention is handled in detail below with reference to Fig. 1; As shown in the figure, present embodiment realizes that an instantaneous consumer applications processing of smart card mainly comprises following flow process:
In consumption initialization step S1, terminal security control module (PSAM) is got the random number response data according to terminal from what card obtained, calculates interim conversation key and consumption ciphertext according to default encryption rule;
In consumption order checking procedure S2, after card is received the instantaneous consumption order of terminal transmission, check the transaction critical data of this instantaneous consumption order, and described consumption ciphertext is carried out verification;
In consumption order treatment step S3, after the inspection of described transaction critical data and consumption ciphertext verification are passed through, carry out consumption and handle.
During specific implementation, described consumption initialization step S1 can specifically comprise:
Get random number request forwarding step S11, terminal sends the random number Get Challenge request of getting to card;
Get random number request processing step S12, after card is received the Get Challenge request of terminal transmission, produce the pseudo random number of a default byte length, return the response data that comprises described pseudo random number to described terminal, described default byte length can be 8 bytes;
Consumption cryptogram computation step S13 after PSAM obtains described response data from terminal, produces the interim conversation key and calculates the consumption ciphertext according to default encryption rule.
Described consumption order checking procedure S2 can specifically comprise:
Consumption order forwarding step S21, terminal is sent instantaneous consumption Quick Purchase instruction to card;
Consumption information is checked step S22, after card receives described Quick Purchase instruction, checks the critical data information of card stored, and described data message comprises the amount of money, key information at least;
Consumption ciphertext checking procedure S23, after described critical data information check passed through, the described consumption ciphertext of verification if verification is passed through, was then carried out described consumption order treatment step S3.
Described consumption order treatment step S3 can specifically comprise:
The step of withholing S31, card is carried out the processing of withholing;
Produce certificate of fair step S32, card produces certificate of fair according to described consumption ciphertext and transaction data;
Key message step of updating S33, the remaining sum of renewal card.
In addition, consider, after described generation certificate of fair step S33, also can comprise in order to facilitate the whole transaction integrality of card and terminal:
Certificate of fair verification step S4, the terminal security control module is verified the certificate of fair that described card produces, and is carried out corresponding operating according to the checking result.
During specific implementation, the encryption rule of the embodiment of the invention is to adopt cryptographic block chain (CBC-DES) to encrypt.
Describe the instantaneous consumption Get Challenge instruction of present embodiment below in detail.
In the present embodiment, card is mainly finished instantaneous consumer sale by instantaneous consumption order, and it instructs as following table 1:
The instantaneous consumption order table of table 1
This instruction return data table such as following table 2:
The instantaneous consumption order return data of table 2 table
| SW1 | SW2 | Explanation |
| 65 | 81 | EMS memory error |
| 61 | XX | Normal termination still has XX valid data desirable |
| 67 | 00 | The data length mistake |
| 69 | 82 | Safe condition does not satisfy |
| 69 | 85 | Service condition does not satisfy |
| 6A | 80 | The data field parameter is incorrect |
| 6A | 82 | Do not find file |
| 6B | 00 | Parameter error (offset address has exceeded the EF file size) |
In the consumption order treatment scheme, card by above-mentioned instruction realize that key confirmation, transaction are withholdd, the generation of certificate of fair and transaction verification sign indicating number, guarantee the integrality of transaction in the implementation, the atomicity of promptly concluding the business operation, just there are Fail Transaction and successful two states when card is carried out this instruction, do not allow ambiguity.This instruction allows the many wallets under the single application of card support to handle consumer sales, specifies wallet ID when giving an order.Instruction simultaneously needs to obtain random number from Card-terminal before carrying out, and sensitive information all is encrypted test mode input and output.
Describe the instantaneous consumer sale certificate in the present embodiment below in detail.
Certificate of fair (transaction TC) belongs to the voucher that produces in the card consumer sale process, the certificate of fair that the each transaction of card output produces, and this denies as trade prevention and the anti-processing Rule of judgment that pulls out of card.
Certificate of fair is encrypted generation by signature key to key in the transaction, and data are composed as follows:
Type of transaction (1 byte);
Wallet balances (3 byte);
Dealing money (3 byte);
Byte wallet file ID (1 byte).
Certificate of fair is used to guarantee the transaction integrality processing spec:
Card must more calculate transaction TC before the new balance, in case the balance updates success must assurance can obtain this transaction TC by GET TRANSCTION PROVE order.Made remaining sum return to the preceding numerical value of renewal if prevent pulling out recovery, consuming relevant enciphered data so needn't keep again.When receiving the order of change stored value card (EP) remaining sum, these enciphered datas may be dropped.
If finish in the order executed, and terminal is not received also before the response that card is extracted suddenly, terminal will be in the indeterminate state of not knowing whether card upgrades.In this case, terminal should be responsible for recovering with GETTRANSACTION PROVE order.If extracted suddenly when card is being handled, terminal should be reminded and be inserted card again.Terminal will be checked and confirm whether card that inserts and the card of extracting previously are the same card afterwards.If the same card, terminal is sent GETTRANSACTION PROVE order.If transaction TC returns, terminal is promptly finished transaction processing; If transaction TC can't loopback, illustrate that then the remaining sum in the IC-card is not modified.Transaction can be initiated to restart by terminal once more.
GETTRANSACTION PROVE order is for getting the transaction verification order, and it is described as follows table 3:
Table 3GETTRANSACTION PROVE command list
| Code | Codomain (HEX) | Explanation |
| CLA | 80 | |
| INS | 5A | |
| P1 | 00 | |
| P2 | Xx | Instantaneous consumer sale type |
| LC | Command data length | |
| DATA | Obtain the transaction sequence number of certificate of fair. | |
| LE | Phase return data (certificate of fair) length |
Its return state such as following table 4:
Table 4GETTRANSACTION PROVE order return state table
| SW1 | SW2 | Explanation |
| 69 | 82 | Safe condition does not satisfy |
| 69 | 85 | Service condition does not satisfy |
| 6D | 00 | INS does not support |
| 6E | 00 | CLA does not support |
| 94 | 06 | Required certificate of fair is unavailable |
Describe an embodiment of the instantaneous consumer applications disposal system of smart card of the present invention in detail below with reference to Fig. 2; As shown in the figure, present embodiment mainly includes:
Consumption order verification unit 2 is arranged on Card-terminal, is used for checking the transaction critical data of this instantaneous consumption order after receiving the instantaneous consumption order that terminal sends, and described consumption ciphertext is carried out verification;
Consumption order processing unit 3 is arranged on Card-terminal, after the inspection of described transaction critical data and consumption ciphertext verification are passed through, carries out consumption and handles.
During specific implementation, described consumption initialization unit 1 can specifically include:
Get random number request transmitting unit 11, be arranged on terminal, be used for sending the random number request of getting to card;
Get random number requesting processing 12, be arranged on Card-terminal, be used for receive described get that the random number request transmitting unit sends get the random number request after, produce the pseudo random number of a default byte length, return the response data that comprises described pseudo random number to described terminal;
Consumption cryptogram computation unit 13 is arranged on the terminal security control module, after being used for obtaining described response data from terminal, produces the interim conversation key and calculates the consumption ciphertext according to default encryption rule.
Described consumption order verification unit 2 can specifically include:
Consumption order transmitting element 21 is arranged on terminal, is used for sending instantaneous consumption order to card;
Consumption information inspection unit 22 is arranged on Card-terminal, is used for after receiving described instantaneous consumption order, checks the critical data information of card stored, and described critical data information comprises the amount of money, key information at least;
Consumption ciphertext verification unit 23 links to each other with described consumption information inspection unit, is used for after described critical data information check passes through, and the described consumption ciphertext of verification if verification is passed through, then sends enabling signal to described consumption order processing unit.
Described consumption order processing unit 3 can specifically include:
The unit 31 of withholing is used for carrying out the processing of withholing;
Produce certificate of fair unit 32, be used for producing certificate of fair according to described consumption ciphertext and transaction data;
Critical data updating block 33 is used to upgrade the remaining sum of card.
In addition, in the present embodiment, described generation certificate of fair unit 32 also can be connected with:
Certificate of fair authentication unit 4 is arranged on the terminal security control module, is used for the certificate of fair that described card produces is verified, and carries out corresponding operating according to the checking result.
In sum, the instantaneous consumption of smart card provided by the invention reaches the application processing scheme of safety fast, transaction step and exchange hour have been optimized greatly, it allows the holder to use wallet balances to do shopping or obtains service, be applicable to the application scenarios of various instantaneous consumption, especially fast consumer environment is generally offline transaction.The instantaneity and the security context of its this application processing method comprise:
1, the instantaneous consumer sale flow process of CPU card: the transaction processing flow process of the instantaneous consumption of regulation card, the detailed process step of execution consumer sale process, the cryptographic algorithm of process key and data organization in the consumer sale;
2, the instantaneous consumer applications instruction process of CPU card: data processing and response data when the regulation card is carried out instantaneous consumption order order;
3, the instantaneous consumer applications certificate of fair of CPU card is handled: the generation of transaction voucher, preservation and use-pattern during the regulation consumer sale.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (10)
1. instantaneous consumer applications disposal route of smart card is characterized in that this method may further comprise the steps:
The consumption initialization step, the terminal security control module is got the random number response data according to terminal from what card obtained, calculates interim conversation key and consumption ciphertext according to default encryption rule;
After consumption order checking procedure, card are received the instantaneous consumption order of terminal transmission, check the transaction critical data of this instantaneous consumption order, and described consumption ciphertext is carried out verification;
The consumption order treatment step after the inspection of described transaction critical data and consumption ciphertext verification are passed through, is carried out consumption and is handled.
2. the instantaneous consumer applications disposal route of smart card as claimed in claim 1 is characterized in that, described consumption order checking procedure specifically includes:
The consumption order forwarding step, terminal is sent instantaneous consumption order to card;
Consumption information is checked step, after card receives described instantaneous consumption order, checks the critical data information of card stored, and described critical data information comprises the amount of money, key information at least;
Consumption ciphertext checking procedure, after described critical data information check passed through, the described consumption ciphertext of verification if verification is passed through, was then carried out described consumption order treatment step.
3. the instantaneous consumer applications disposal route of smart card as claimed in claim 2 is characterized in that, described consumption order treatment step specifically includes:
The step of withholing, card is carried out the processing of withholing;
Produce the certificate of fair step, card produces certificate of fair according to described consumption ciphertext and transaction data;
The critical data step of updating, the remaining sum of renewal card.
4. the instantaneous consumer applications disposal route of smart card as claimed in claim 3 is characterized in that, also comprises after described generation certificate of fair step:
Certificate of fair verification step, terminal security control module are verified the certificate of fair that described card produces, and are carried out corresponding operating according to the checking result.
5. as the instantaneous consumer applications disposal route of each described smart card among the claim 1-4, it is characterized in that described consumption initialization step comprises:
Get random number request forwarding step, terminal sends the random number request of getting to card;
Get the random number request processing step, card receives that terminal sends get the random number request after, produce the pseudo random number of a default byte length, return the response data that comprises described pseudo random number to described terminal;
Consumption cryptogram computation step after the terminal security control module obtains described response data from terminal, produces the interim conversation key and calculates the consumption ciphertext according to default encryption rule.
6. instantaneous consumer applications disposal system of smart card is characterized in that this system includes:
The consumption initialization unit is arranged on the terminal security control module, is used for getting the random number response data according to terminal from what card obtained, calculates interim conversation key and consumption ciphertext according to default encryption rule;
The consumption order verification unit is arranged on Card-terminal, is used for checking the transaction critical data of this instantaneous consumption order after receiving the instantaneous consumption order that terminal sends, and described consumption ciphertext is carried out verification;
The consumption order processing unit is arranged on Card-terminal, after the inspection of described transaction critical data and consumption ciphertext verification are passed through, carries out consumption and handles.
7. the instantaneous consumer applications disposal system of smart card as claimed in claim 6 is characterized in that, described consumption order verification unit includes:
The consumption order transmitting element is arranged on terminal, is used for sending instantaneous consumption order to card;
The consumption information inspection unit is arranged on Card-terminal, is used for after receiving described instantaneous consumption order, checks the critical data information of card stored, and described critical data information comprises the amount of money, key information at least;
Consumption ciphertext verification unit links to each other with described consumption information inspection unit, is used for after described critical data information check passes through, and the described consumption ciphertext of verification if verification is passed through, then sends enabling signal to described consumption order processing unit.
8. the instantaneous consumer applications disposal system of smart card as claimed in claim 7 is characterized in that, described consumption order processing unit includes:
The unit of withholing is used for carrying out the processing of withholing;
Produce the certificate of fair unit, be used for producing certificate of fair according to described consumption ciphertext and transaction data;
The critical data updating block is used to upgrade the remaining sum of card.
9. the instantaneous consumer applications disposal system of smart card as claimed in claim 8 is characterized in that, described generation certificate of fair unit also is connected with:
The certificate of fair authentication unit is arranged on the terminal security control module, is used for the certificate of fair that described card produces is verified, and carries out corresponding operating according to the checking result.
10. as the instantaneous consumer applications disposal system of each described smart card among the claim 6-9, it is characterized in that described consumption initialization unit includes:
Get the random number request transmitting unit, be arranged on terminal, be used for sending the random number request of getting to card;
Get the random number requesting processing, be arranged on Card-terminal, be used for receive described get that the random number request transmitting unit sends get the random number request after, produce the pseudo random number of a default byte length, return the response data that comprises described pseudo random number to described terminal;
Consumption cryptogram computation unit is arranged on the terminal security control module, after being used for obtaining described response data from terminal, produces the interim conversation key and calculates the consumption ciphertext according to default encryption rule.
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| CN104537535A (en) * | 2015-01-22 | 2015-04-22 | 郭炯光 | Intelligent car, intelligent card working method and intelligent card monitoring system |
| CN106339874A (en) * | 2016-08-11 | 2017-01-18 | 飞天诚信科技股份有限公司 | Online transaction method, visual financial IC card, client and server |
| CN106780995A (en) * | 2016-11-24 | 2017-05-31 | 深圳市久通物联科技股份有限公司 | A kind of application processes of PBOC in public transport ticket checking terminal |
| CN109685190A (en) * | 2018-12-28 | 2019-04-26 | 江苏恒宝智能系统技术有限公司 | A kind of IC card power-off protection method and device |
| CN113127426A (en) * | 2021-04-28 | 2021-07-16 | 武汉天喻信息产业股份有限公司 | File management method and system of smart card |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104537535A (en) * | 2015-01-22 | 2015-04-22 | 郭炯光 | Intelligent car, intelligent card working method and intelligent card monitoring system |
| CN104537535B (en) * | 2015-01-22 | 2018-04-24 | 郭炯光 | Smart card, smart card method of work and smart card monitoring system |
| CN106339874A (en) * | 2016-08-11 | 2017-01-18 | 飞天诚信科技股份有限公司 | Online transaction method, visual financial IC card, client and server |
| WO2018028418A1 (en) * | 2016-08-11 | 2018-02-15 | 飞天诚信科技股份有限公司 | Online transaction method, visual financial ic card, client, and server |
| CN106339874B (en) * | 2016-08-11 | 2019-03-15 | 飞天诚信科技股份有限公司 | A kind of on-line transaction method, visual financial IC card, client and server |
| CN106780995A (en) * | 2016-11-24 | 2017-05-31 | 深圳市久通物联科技股份有限公司 | A kind of application processes of PBOC in public transport ticket checking terminal |
| CN109685190A (en) * | 2018-12-28 | 2019-04-26 | 江苏恒宝智能系统技术有限公司 | A kind of IC card power-off protection method and device |
| CN109685190B (en) * | 2018-12-28 | 2022-04-12 | 江苏恒宝智能系统技术有限公司 | Power-down protection method and device for IC card |
| CN113127426A (en) * | 2021-04-28 | 2021-07-16 | 武汉天喻信息产业股份有限公司 | File management method and system of smart card |
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Application publication date: 20111123 |