CN103324971B - A kind of smart card system and dynamic key thereof upgrade authentication method - Google Patents

A kind of smart card system and dynamic key thereof upgrade authentication method Download PDF

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Publication number
CN103324971B
CN103324971B CN201310289791.XA CN201310289791A CN103324971B CN 103324971 B CN103324971 B CN 103324971B CN 201310289791 A CN201310289791 A CN 201310289791A CN 103324971 B CN103324971 B CN 103324971B
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China
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timestamp
module
smart card
new
write
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CN201310289791.XA
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CN103324971A (en
Inventor
李彤
吕军
郭浩
武卉明
龚尧菀
岳杰
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Academy of Armored Forces Engineering of PLA
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Academy of Armored Forces Engineering of PLA
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Abstract

The present invention relates to a kind of smart card system and dynamic key thereof of taking precautions against communication line TRANSEC transmission security hidden danger and upgrade authentication method, its timestamp generates with authentication module and provides system timestamp information for not timing to described frequency read/write, and verifies that whether the timestamp information of passing back through device-fingerprint code encryption that described frequency read/write returns is consistent with the timestamp information of described remote server generation; Security module is for the intelligent card data of radio-frequency card reader read-write is encrypted and is deciphered, so that what transmit between radio-frequency card reader and server is all enciphered message. Smart card system of the present invention utilizes Dynamic time-stamp authentication mechanism and dynamic password encryption and decryption technology, ensure that radio-frequency card reader is to data security on the communication line of server, block the potential safety hazard on application smart card information system communications line road, ensure the security of intelligent card data transmission, be applicable to the information system management of personnel, goods and materials and equipment.

Description

A kind of smart card system and dynamic key thereof upgrade authentication method
[technical field]
The present invention relates to a kind of smart card information system, be specifically related to a kind of order wire of taking precautions againstThe smart card system of road TRANSEC transmission security hidden danger and dynamic key thereof upgrade authentication method, belong toField of information security technology.
[background technology]
At present, my army is used smart card information system in a large number, relate to various goods and materials,Equipment and personnel's management, smart card information System Security Vulnerability can make the military letter of being correlated withBreath systems face the potential safety hazard more serious than general information system.
In smart card security Mechanism Study in recent years, a lot of researchers have proposed to be permittedMultiple securities mechanism, as: the Hash-Lock authentication protocol that the people such as Sarma propose; Weis etc.The randomization Hash-Lock authentication protocol that people proposes; The distributed intelligence that the people such as Rhee proposeCan block inquiry-response authentication agreement; The Hash chain authentication protocol that the people such as Ohkubo propose;The LCAP authentication protocol that the people such as Lee propose; And the people such as Henrici propose based on assortedThe ID that gathers changes authentication protocol, etc.
But in above-mentioned authentication protocol, or only meet in smart card system demand for security oneOr several, do not realize overall Security Target completely, or with regard to too complex,The storage resources needing and computational resource have exceeded the limit of existing smart card label resource,Cannot specifically implement. Especially a lot of smart card authentication agreements are to be based upon service, at presentBetween device and read write line, be under the supposed premise of secure communication channel, and in fact, this sectionThere is potential safety hazard in transmission line, what between server and frequency read/write, transmit is mostlyNon-encrypted data, so just can be by modes such as accesses in the middle of transmission line by clothesThe Data acquisition transmitting between business device and read write line, the relevant information of acquisition smart card, instituteExist serious potential safety hazard with current this application of IC cards system.
Therefore,, for avoiding above-mentioned technical problem, the necessary one that provides is taken precautions against order wireThe smart card system of road TRANSEC transmission security hidden danger and dynamic key thereof upgrade authentication method, with gramTake described defect of the prior art.
[summary of the invention]
For addressing the above problem, the object of the present invention is to provide a kind of on transmission lineCarry out the smart card system of Data Encryption Transmission, it can be taken precautions against from transmission line and carry out intelligenceCan intercept and capture by card information.
Another object of the present invention is to provide a kind of communication line TRANSEC transmission security hidden danger of taking precautions againstSmart card system dynamic key upgrade authentication method.
For realizing above-mentioned the first object, the technical scheme that the present invention takes is: a kind of intelligenceCard system, it comprises smart card, frequency read/write and far-end server; Wherein,
Described far-end server comprises that timestamp generates and authentication module, and security module is superTime processing module, monitoring display screen and siren; Wherein, described timestamp generate withAuthentication module provides system timestamp information for not timing to described frequency read/write, andVerify the timestamp that utilization is new, used equipment fingerprint code is encrypted that described frequency read/write returnsInformation and described remote server utilize new, the used equipment fingerprint code pair of this frequency read/writeWhether the timestamp information after return of value deciphering is consistent; Described in described security module is used for inciting somebody to actionThe data of transmitting between far-end server and described frequency read/write are encrypted and decipher;
Described frequency read/write comprises MCU module, RF receiving and transmission module, communication interfaceModule, FLASH memory module. Wherein, described FLASH memory module is for storageBased on the new and old device-fingerprint code of timestamp; Described MCU module comprise one dynamic closeCode generation module and data encrypting and deciphering module, dynamic password generation modules is for reading when radio frequencyWhen writing device and receiving the new timestamp that described far-end server sends, judge that new timestamp isThe no old timestamp of preserving in described FLASH memory module that is greater than, as immediately, opensMoving described dynamic password generation modules, generates one group of dynamic password as new equipment fingerprint code,And utilize new, used equipment fingerprint code respectively to new timestamp be encrypted rear as password moreNew confirmation return of value, sends to described far-end server, and data encrypting and deciphering module completes numberAccording to encryption and decryption function; Described communication interface modules comprises RS232 interface, USB connectsMouth or RS485 interface.
Smart card system of the present invention is further: described security module comprises for usingThe data of symmetric cryptography communication are carried out the symmetric cryptographic algorithm module of encryption and decryption computing, andFor carrying out the Hash operation module of Hash operation.
Smart card system of the present invention is further: described far-end server is when describedBetween stamp generate with authentication module not timing to described frequency read/write send one group newly-generatedTimestamp, and simultaneously that described timestamp is new by one group of described security module generationDevice-fingerprint code; Described frequency read/write is received after new timestamp, described MCU mouldPiece judges whether the new timestamp of receiving is greater than old timestamp; When new timestamp is greater than the old timesBetween while stabbing, frequency read/write recalculates the new device-fingerprint code of rear generation and passes as dataDefeated encryption and decryption code, and by new timestamp respectively after new, device-fingerprint code encryption back pass giveDescribed far-end server upgrades confirmation as dynamic key.
Smart card system of the present invention is further: described far-end server receives in timeAfter described frequency read/write return of value, described far-end server utilizes respectively this radio frequency read-writeNew, the used equipment fingerprint code of device compare to determine after the return of value of receiving is deciphered, whenWhen new timestamp that the new timestamp value of returning has generated with described far-end server is consistent,Illustrate that the dynamic key that described far-end server receives that described frequency read/write returns upgrades reallyRecognize information, smart card system dynamic key has upgraded, and described smart card system is assert lineThere is not the potential safety hazard of malicious attack in terminal, the new equipment of enabling this frequency read/write refers toLine code is encrypted and deciphers transceiving data as encryption and decryption key; Work as timestamp informationWhen inconsistent, re-start and once upgrade certification; Upgrade after certification, still not for continuous three timesWhen consistent, described smart card system assert that line scan pickup coil side exists severe jamming or opens circuit,Stop communication, described siren starts;
Smart card system of the present invention also can be: described far-end server sends newly-generatedAfter timestamp, the module of timeout treatment shown in startup, when timeout treatment module timing time arrivesTime, do not receive that yet the dynamic key that described frequency read/write returns has upgraded confirmationTime, timeout treatment module shown in restarting, and upgrade again certification; AgainOnce upgrade after certification, described far-end server receives that described frequency read/write returnsDynamic key upgrade confirmation, described smart card system assert that line scan pickup coil side does not exist evilMeaning is attacked. Upgrade after certification if re-start three times, described far-end server is received not yetThe dynamic key that described frequency read/write returns upgrades confirmation, described smart card systemAssert that line scan pickup coil side exists severe jamming or opens circuit, stop communication, described siren opensMoving;
For realizing above-mentioned the second object, the technical scheme that the present invention takes is: a kind of intelligenceThe dynamic key of card system upgrades authentication method, and it comprises the steps:
Step 1: described far-end server by described timestamp generate with authentication module notTiming sends one group of newly-generated timestamp to described frequency read/write, and described in inciting somebody to action simultaneouslyTimestamp generates one group of new device-fingerprint code by described security module;
Step 2: described frequency read/write is received after new timestamp, described MCU moduleRecall the old timestamp of described FLASH memory module, and judge that whether new timestamp is largeIn old timestamp;
Step 3: if new timestamp is greater than old timestamp, by described FLASH storage mouldThe old timestamp of piece is replaced by this new timestamp, starts described dynamic password generation modules,Generate new device-fingerprint code, and utilize respectively new, used equipment fingerprint code to new timestampBe encrypted afterwards as password update confirmation value, send to described far-end server; OtherwiseDescribed frequency read/write only utilizes used equipment fingerprint code to be encrypted new timestamp, asReturn of value sends to described far-end server;
Step 4: described far-end server is to the return of value of described radio-frequency card reader warp respectivelyNewly, compare judgement after used equipment fingerprint code deciphering, when the new timestamp value of returning withWhen new timestamp that described far-end server generates is consistent, described smart card system is dynamically closeCode has upgraded, and assert that line scan pickup coil side does not exist the potential safety hazard of malicious attack, otherwise described inSmart card system startup is again upgraded authentication procedure or is started described siren;
Step 5: in the time that described smart card is carried out to reading and writing data, described remote serverUtilize new equipment fingerprint code, as key, data message is encrypted to rear transmission or solution is connected airtightReceive data, described radio-frequency card reader utilizes new equipment fingerprint code to read in number to described smart cardAccording to the information of transmitting after encrypting or deciphering transmits from circuit.
The dynamic key of smart card system of the present invention upgrades authentication method:
When far-end server receives after described frequency read/write return of value, utilize described far awayThe new equipment fingerprint code that end server generates is decrypted return of value, when decryptedWhen timestamp value is consistent with new timestamp value, the new equipment fingerprint code of described smart card systemUpgrade completely, and can assert that line scan pickup coil side does not exist the potential safety hazard of malicious attack; When receivingTimestamp information and described far-end server timestamp when inconsistent, or described in not receivingWhen frequency read/write return information, shown in timeout treatment module start, re-start onceTimestamp certified transmission; Upgrade after certification for continuous three times, described far-end server is received not yetThe orthochronous stamp information of returning to described frequency read/write, described smart card system identificationThere is severe jamming or open circuit in line scan pickup coil side, stops communication, and described siren starts.
It is further institute that the dynamic key of smart card system of the present invention upgrades authentication methodState after the line scan pickup coil side certification of smart card system the described monitoring on described far-end serverDisplay screen shows authentication result.
Compared with prior art, the present invention has following beneficial effect: strick precaution of the present inventionThe smart card system of communication line TRANSEC transmission security hidden danger utilize Dynamic time-stamp authentication mechanism andDynamic password encryption and decryption technology, has ensured that radio-frequency card reader is to this section of line of server effectivelyThe safety of communicating by letter on road, the safety of having blocked application of IC cards information system transmission line is hiddenSuffer from, ensured the security of intelligent card data, be applicable to the letter of personnel, goods and materials and equipmentBreathization management.
[brief description of the drawings]
Fig. 1 is the schematic diagram of smart card system of the present invention.
Fig. 2 is the schematic diagram of another embodiment of smart card system of the present invention.
[detailed description of the invention]
Refer to shown in Figure of description 1, the present invention is a kind of communication line transmission of taking precautions againstPotential safety hazard smart card system, it comprises smart card 12, frequency read/write 13 withAnd far-end server 14.
Described far-end server comprises that timestamp generates and authentication module 1, security module 4,Timeout treatment module 3, monitoring display screen 2 and siren 5; Described timestamp generate withAuthentication module 1 provides system time information for not timing to described frequency read/write 13,And the new equipment fingerprint code being generated by described remote server 14 carries out the information receivingDeciphering obtains the timestamp information that described frequency read/write 13 returns, and judges timestamp informationWhether consistent; Described security module 4 is for being encrypted reconciliation by smart card information dataClose.
Described radio-frequency card reader 12 comprises MCU module 10, and RF receiving and transmission module 9 is logicalLetter interface module 7, FLASH memory module 8. MCU mould in frequency read/write 13Piece 10 is connected with smart card 12 and is carried out by RF receiving and transmission module 9, radio-frequency antenna 11Communication. RF receiving and transmission module selected frequency is the FM1702 sheet of 13.56MHZ.
MCU module 10 in frequency read/write 13 is by communication interface modules 7 and far awayEnd server 14 connects. Communication interface can be RS232 serial ports, RS485 serial ports orUsb data mouth, wherein the data between radio-frequency card reader 13 and far-end server 14 passThe defeated ciphertext that all adopts is transmitted.
Described FLASH memory module 8 refers to for the equipment of storing last authentication successLine code and timestamp; Described MCU module 10 comprises a dynamic device fingerprint code and generatesModule, MCU sends for receiving described far-end server 14 when frequency read/write 13New timestamp time, judge whether new timestamp is greater than described FLASH memory module 8The old timestamp of preserving, as immediately, starts described dynamic device fingerprint code generation module,Generate one group of new device-fingerprint code, and utilize new, used equipment fingerprint code to new timestampBe encrypted afterwards as return of value, send to described far-end server 14. Otherwise only utilizeUsed equipment fingerprint code is encrypted rear as return of value to new timestamp, send to described far awayEnd server 14.
When far-end server 14 receives after described frequency read/write 13 return of values, utilizeThe new equipment fingerprint code that described far-end server 14 generates is decrypted return of value, works as instituteThe timestamp value decrypting is with new timestamp value when consistent, newly the establishing of described smart card systemStandby fingerprint code upgrades complete (circuit dynamic encryption and decryption password update is complete), and can assert lineThere is not the potential safety hazard of malicious attack in terminal; When the timestamp information of receiving and described far awayEnd server 14 timestamps are when inconsistent, or do not receive that described frequency read/write 13 returnsWhen information, shown in timeout treatment module start, re-start timestamp certified transmission one time;If continuously after the certification of cubic curve road, described far-end server 14 does not receive that described radio frequency reads yetWrite the orthochronous stamp information that device 13 returns, described smart card system assert that line scan pickup coil side existsSevere jamming or open circuit, stops communication, and described siren 5 starts.
Further, after the line scan pickup coil side certification of described smart card system, at described far-end clothesDescribed monitoring display screen 2 on business device shows authentication result.
The line scan pickup coil side certification of described smart card system (assert that line scan pickup coil side does not exist by rearThe potential safety hazard of malicious attack), described MCU module 10 is by described radio-frequency receiving-transmitting mouldPiece 9 and radio-frequency antenna 11 start the read-write behaviour who described smart card 12 is carried out to data messageDo.
This smart card system is applicable to the information system management of army's concerning security matters goods and materials equipment, passes throughThe Dynamic time-stamp and the dynamic cipher verification that produce, can with what ensure line scan pickup coil side communication securityLean on property, and the security of information data.
Refer to shown in Figure of description 2, it is strick precaution communication line transmission of the present inventionAnother embodiment of the smart card of potential safety hazard, it comprises smart card 12, frequency read/write13 and far-end server 14; Described far-end server comprises that timestamp generates and checking mouldPiece 1, security module 4, timeout treatment module 3, monitoring display screen 2 and siren 5;Described timestamp generates with authentication module 1 for not timing to described frequency read/write 13System timestamp information is provided, and verify described radio-frequency card reader 13 time of return stamp andWhether the timestamp information that described remote server 14 generates is consistent; Described security module 4For user profile data are encrypted and are deciphered, and described timestamp is generated and testedCard module 1 is encrypted the new timestamp generating, simultaneously to described frequency read/write 13Returning to described timestamp information is decrypted.
Described radio-frequency card reader 13 comprises MCU module 10, and RF receiving and transmission module 9 is logicalLetter interface module 7, FLASH memory module 8.
Described radio-frequency card reader 13 also comprises a display screen 15 and button 16, described MCUModule 10 is connected respectively with display screen 15, button 16, and described button 16 is used for controllingWhether described display screen 15 shows that radio-frequency card reader 13 is connected shape with far-end server 14State.
In the time that described button 16 is pressed, described display screen 15 shows described radio frequency Card ReaderDevice 13 and far-end server 14 connection status.
After the line scan pickup coil side certification of described smart card system is passed through, described MCU module 10 is logicalCross described RF receiving and transmission module 9 and radio-frequency antenna 11 and start described smart card 12, to instituteState the read operation that smart card 12 carries out data message. Further preferably, described demonstrationScreen 15 is also with the reading result that shows described intelligent card data information.
By Dynamic time-stamp produce and dynamic device fingerprint code generate with checking after, abilityDescribed smart card 12 data are carried out to read-write operation and encrypted transmission, and the data of reading and writing passDefeated success or not shows on described display screen 15, and user can be by described demonstrationWhether screen 15 is seen read-write result, correct by the data of this this time read-write of data judgement,Avoid the data transmission fault that may cause in process operation data.
It is as follows that the dynamic key of smart card system of the present invention upgrades authentication method:
(1) described far-end server 14 by described timestamp generate with authentication module notTiming sends one group of newly-generated timestamp to described frequency read/write 13, and simultaneously by instituteState timestamp and generate one group of new device-fingerprint code by described security module;
(2) described frequency read/write is received after new timestamp, described MCU module 10Call the old timestamp in described FLASH memory module 8, and judge that new timestamp isNoly be greater than old timestamp;
(3) if new timestamp is greater than old timestamp, described FLASH memory module 8Old timestamp is replaced by new timestamp, starts described dynamic password generation modules, generates newDevice-fingerprint code, and utilize new, used equipment fingerprint code respectively new timestamp to be addedClose rear as return of value, send to described far-end server 14, otherwise frequency read/write 13Only return to the new timestamp information return of value that used equipment fingerprint code is encrypted;
(4) described far-end server 14 to the return of value of described radio-frequency card reader 13 respectivelyJudge after deciphering through new, used equipment fingerprint code, when return of value and described remote serviceWhen new timestamp that device 14 generates is consistent, described smart card system dynamic password has upgradedBecome, assert that line scan pickup coil side does not exist the potential safety hazard of malicious attack, otherwise described smart card systemSystem startup is again upgraded authentication procedure or is started described siren;
(5) in the time that described smart card is carried out to reading and writing data, described remote server 14Utilize new equipment fingerprint code that the data message reading is encrypted rear transmission or is deciphered from lineThe information that road transmits writes smart card. Described radio-frequency card reader 13 utilizes new equipment to refer toAfter the data encryption that line code is read described smart card 12, transmission or deciphering circuit transmittedThe information of coming.
The dynamic key of smart card system of the present invention upgrades authentication method:
When far-end server 14 receives after described frequency read/write 13 return of values, utilizeThe new equipment fingerprint code that described far-end server 14 generates is decrypted return of value, works as instituteThe timestamp value decrypting is with new timestamp value when consistent, newly the establishing of described smart card systemStandby fingerprint code upgrades complete, and can assert that line scan pickup coil side does not exist the potential safety hazard of malicious attack;When the timestamp information of receiving and described far-end server 14 timestamps are when inconsistent, or notWhile receiving described frequency read/write 13 return information, shown in timeout treatment module start, heavyNewly carry out timestamp certified transmission one time; After the certification of cubic curve road, described far-end takes continuouslyBusiness device 14 is not received the orthochronous stamp information that described frequency read/write 13 returns, institute yetState smart card system and assert that line scan pickup coil side exists severe jamming or opens circuit, stop communication,Described siren 5 starts.
Further, after the line scan pickup coil side certification of described smart card system, at described far-end clothesDescribed monitoring display screen 2 on business device shows authentication result.
Stab by dynamic transmitting time, dynamically update the device-fingerprint code of radio-frequency card reader alsoChecking, what ability was safe carries out read-write operation to described smart card 12 data, and it is dynamically establishedThe result that standby fingerprint code upgrades certification also can show by described display screen 15, can sentence accordinglyWhether disconnected this dynamic device fingerprint code upgrades successful.
Above method is passed through the Dynamic time-stamp producing, the device-fingerprint code that upgrades in time,And utilize this fingerprint code that the intelligent card data of circuit transmission is encrypted and is deciphered, to protectThe line scan pickup coil side communications security of card smart card system, and the security of classified information data.
Above detailed description of the invention is only the preferred embodiment of this creation, not in order to limitMake this creation, any amendment of making within all spirit in this creation and principle, be equal toReplacement, improvement etc., within all should being included in the protection domain of this creation.

Claims (5)

1. a smart card system, is characterized in that: comprise smart card, frequency read/writeAnd far-end server; Wherein,
Described far-end server comprises that timestamp generates and authentication module, and security module is superTime processing module, monitoring display screen and siren; Described timestamp generates and checking mouldPiece provides system time information for not timing to described frequency read/write, and by described far awayThe new equipment fingerprint code that end server generates is decrypted described in acquisition and penetrates the information receivingFrequently the timestamp information that read write line returns, judges that whether timestamp information is consistent; Described safetyModule is for being encrypted the information data of smart card and decipher;
Described frequency read/write comprises MCU module, RF receiving and transmission module, communication interfaceModule, FLASH memory module; Wherein, described FLASH memory module is for storageBased on the new and old device-fingerprint code of timestamp; Described MCU module comprise one dynamic closeCode generation module and data encrypting and deciphering module, dynamic password generation modules is for reading when radio frequencyWhen writing device and receiving the new timestamp that described far-end server sends, judge that new timestamp isThe no old timestamp of preserving in described FLASH memory module that is greater than, when new timestamp largeIn the time of old timestamp, start described dynamic password generation modules, generate one group of dynamic passwordAs new equipment fingerprint code, and utilization is new, used equipment fingerprint code enters new timestamp respectivelyRow is confirmed return of value as password update after encrypting, and sends to described far-end server, numberComplete data encryption and decipher function according to encryption and decryption module; Described communication interface modules comprisesRS232 interface, RS485 interface or USB interface.
2. smart card system as claimed in claim 1, is characterized in that: described safetyIt is close that module comprises that the data for using symmetric cryptography communication are carried out the symmetry of encryption and decryption computingCode calculation module, and for carrying out the Hash operation module of Hash operation.
3. smart card system as claimed in claim 2, is characterized in that: described far-endServer generates with authentication module not timing to described frequency read/write by described timestampSend one group of newly-generated timestamp, and described timestamp is passed through to described safe mould simultaneouslyPiece generates one group of new device-fingerprint code; Described frequency read/write receives after new timestamp,Described MCU module judges whether the new timestamp of receiving is greater than old timestamp; When newBetween stamp while being greater than old timestamp, frequency read/write recalculates the new device-fingerprint of rear generationCode is as transfer of data encryption and decryption code, and by new timestamp respectively through new, used equipment fingerprintAfter code encryption, back pass upgrades confirmation as dynamic key to described far-end server; NoOnly using timestamp through used equipment fingerprint code encrypt after back pass give described far-end server asDynamic key upgrades confirmation.
4. smart card system as claimed in claim 3, is characterized in that: described far-endServer receives after described frequency read/write return of value in time, described far-end server profitWith generate new equipment fingerprint code compare after the return information of receiving is decryptedJudge the new timestamp having generated when the new timestamp value of returning and described far-end serverWhen consistent, illustrate that described far-end server receives that described frequency read/write returns dynamically closeKey upgrades confirmation, and smart card system dynamic key has upgraded, and described smart card isSystem assert that line scan pickup coil side does not exist the potential safety hazard of malicious attack, enables this frequency read/writeNew equipment fingerprint code is encrypted and deciphers transceiving data as encryption and decryption key; When notWhen consistent, re-start and once upgrade certification; Upgrade after certification, still differ for continuous three timesWhile causing, described smart card system assert that line scan pickup coil side exists severe jamming or opens circuit, eventuallyStop-pass letter, described siren starts.
5. smart card system as claimed in claim 4, is characterized in that: described far-endServer sends after newly-generated timestamp, and the module of timeout treatment shown in startup, when overtimeProcessing module timing time then, does not receive that described frequency read/write returns dynamically close yetWhen key has upgraded confirmation, timeout treatment module shown in restarting, and carry out againOnce upgrade certification; Re-start once and upgrade after certification, described far-end server is receivedThe dynamic key that described frequency read/write returns upgrades confirmation, described smart card systemAssert that line scan pickup coil side does not exist malicious attack; Upgrade for three times after certification if re-start, described inFar-end server does not receive that the dynamic key that described frequency read/write returns upgrades confirmation letter yetBreath, described smart card system assert that line scan pickup coil side exists severe jamming or opens circuit, and stopsCommunication, described siren starts.
CN201310289791.XA 2013-07-11 2013-07-11 A kind of smart card system and dynamic key thereof upgrade authentication method Expired - Fee Related CN103324971B (en)

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CN104283689A (en) * 2014-10-20 2015-01-14 优仕达资讯股份有限公司 Wireless verification system and method
CN105243542B (en) * 2015-11-13 2021-07-02 咪付(广西)网络技术有限公司 Dynamic electronic certificate authentication method
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