CN108860062A - Electric car anti-theft authentication method with communication data protection - Google Patents
Electric car anti-theft authentication method with communication data protection Download PDFInfo
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- CN108860062A CN108860062A CN201810821329.2A CN201810821329A CN108860062A CN 108860062 A CN108860062 A CN 108860062A CN 201810821329 A CN201810821329 A CN 201810821329A CN 108860062 A CN108860062 A CN 108860062A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
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Abstract
The invention discloses a kind of electric car anti-theft authentication methods with communication data protection, this method stores identical fixed code and antitheft secret key in the electric machine controller of electric car and anti-theft, and establish the communication connection between electric machine controller and anti-theft, after detecting electric car enabling signal, electric machine controller initiates antitheft authentication procedure, pass through the multiple data communication of computations between electric machine controller and anti-theft and fixed code and antitheft secret key is combined mutually to be verified, and communication data protection mechanism is added in communication process, it is unpacked including data protection packaging and data protection, avoid corrupt data influence caused by antitheft verification process in communication process, effectively improve the reliability of electric car antitheft safety and verification process.
Description
Technical field
The present invention relates to a kind of electric car anti-theft authentication methods with communication data protection.
Background technique
With the development of science and technology and ecological requirements, electric car have become the trend of future development.For tradition
Fuel-engined vehicle, engine theftproof system by the engine anti-theft unit (IMMO) that is installed on vehicle body and Intelligent key and
Control unit of engine (EMS), which carries out coded communication, to be come to control unit of engine（EMS）With anti-theft（IMMO）Between
Information is verified, and is realized to the antitheft of vehicle.However there is no engine and control unit of engine for electric car
(EMS), therefore the engine theftproof system of conventional fuel oil automobile can not be continued to use completely.
The current either antitheft related art scheme of orthodox car or electric car is for burglary-resisting system mostly
Framework, process, or it is directed to antitheft interactive authentication method, it is all communicated in communication process without using in these methods
The technical solution of data protection, the corrupt data in communication process can cause very big influence to antitheft verification process, lead to vehicle
Burglary-resisting system mistake, while prior art is also without using electric machine controller（IPU）Unit is initiated as antitheft certification
Technical solution.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of antitheft certifications of electric car with communication data protection
Communication data protection mechanism, solution is added in method, the defect that this method overcomes conventional truck antitheft in antitheft certification communication process
Certainly the corrupt data in communication process is influenced caused by antitheft verification process, effectively improves the safety and certification of automobile burglar
The reliability of process.
In order to solve the above technical problems, electric car anti-theft authentication method of the present invention with communication data protection includes such as
Lower step：
Step 1: storing identical fixed code and antitheft secret key in electric machine controller and anti-theft, electric machine controller is established
Communication connection between anti-theft, after detecting electric car enabling signal, electric machine controller generate one group it is original with
Machine data obtain the random number code by data protection after packing original random number evidence by data protection packaging unit,
And send it to anti-theft；Electric machine controller is encrypted according to original random number evidence, antitheft secret key and fixed code simultaneously
Calculate and generate original first encryption data, will original first encryption data by data protection packaging unit packaging after, obtain through
The first encryption data code of data protection is crossed, and sends it to anti-theft；Electric machine controller is according to original first encryption number
Computations are carried out according to, antitheft secret key and fixed code and generate original third encryption data, and wait the response of anti-theft；
If electric machine controller receives the reply data of anti-theft, five are thened follow the steps, if it is wrong to receive the transmission of anti-theft data
Accidentally response, then initialization data protective packaging unit, re-execute the steps one, if unresponsive within the set time, executes step
Rapid eight；
Step 2: after anti-theft receives the random number code and the first encryption data code that electric machine controller is sent, by random number code
It is decoded with the first encryption data code by data protection unwrapper unit, checks whether there is data transmission fault, if no data transmits
Mistake thens follow the steps three, if there is data transmission fault, thens follow the steps nine；
Step 3: anti-theft obtained after decoding random number code and the first encryption data code electric machine controller generation it is original with
Machine number and original first encryption data calculate according to original random number, antitheft secret key and fixed code and generate original second encryption number
According to original second encryption data and original first encryption data are compared verification, if verifying successfully, then follow the steps four；
Step 4: anti-theft is calculated according to original second encryption data, antitheft secret key and fixed code generates original 4th encryption
Data after packing original 4th encryption data by data protection packaging unit, obtain the 4th encryption by data protection
Numeric data code, and it is sent to electric machine controller；
Step 5: electric machine controller is decoded it by data protection unwrapper unit after receiving the 4th encryption data code, inspection is
It is no to have data transmission fault.If no data error of transmission, thens follow the steps six, if there is data transmission fault, ten are thened follow the steps；
Add Step 6: electric machine controller obtains the original 4th after decoding the 4th encryption data code in data protection unwrapper unit
Original 4th encryption data and the comparison of original third encryption data are verified, if verifying successfully, then follow the steps seven by ciphertext data,
If verification failure, thens follow the steps 11；
Step 7: the antitheft authentication check of electric car passes through, electric machine controller unlocks and allows to start electric car；
Step 8: the unresponsive cumulative number of electric machine controller setting anti-theft within the set time, if unresponsive number is big
It is limited in set cumulative number, thens follow the steps 12, if unresponsive number is less than set cumulative number and limits,
It re-execute the steps one；
Step 9: anti-theft reinitializes data protection unwrapper unit, and data transmission fault response is sent to motor
Controller；
Step 10: electric machine controller sends data transmission fault response to anti-theft, then initialization data protection is unpacked single
Member reinitializes data protection packaging unit after anti-theft receives the data transmission fault response of electric machine controller transmission,
Then anti-theft obtains the 4th encryption data after again packing original 4th encryption data by data protection packaging unit
Code, and it is sent to electric machine controller, execute step 5；
It verifies the frequency of failure Step 11: electric machine controller is accumulative and sets verification frequency of failure limitation, if accumulative verification fails
Number is greater than the number limitation of setting, thens follow the steps 12, if the accumulative verification frequency of failure is less than the number limitation of setting,
It re-execute the steps one；
Step 12: the antitheft authentication check of electric car does not pass through, electric machine controller locking does not allow for starting electric car.
Further, the first encryption data code and the 4th encryption data code include sequence counter, check code and original
Beginning data, the data protection packaging unit and data protection unwrapper unit respectively include identical data check list, described
Data check list includes the operator code for calculating check code.
Further, initial data is packaged into the process packet by data protection numeric data code by the data protection packaging unit
Include following steps：
Step P1, when packing initial data every time, ordinal number Counter Value is added 1, the value as new sequence counter；
Step P2, according to the value of sequence counter, operator code is searched in data check list；
Step P3, verification calculating is carried out to initial data using the operator code that lookup obtains, obtains check code；
Step P4, sequence counter, check code, initial data are combined into the numeric data code by data protection.
Further, the numeric data code Jing Guo data protection is decoded into the process of initial data by the data protection unwrapper unit
Include the following steps：
Step C1, every time when receiving the numeric data code by data protection, check sequence counter therein value whether be on
Value when once receiving the numeric data code by data protection adds 1, if so, C2 is thened follow the steps, it is no to then follow the steps C5；
Step C2, it according to sequence counter in the numeric data code by data protection is received, searches and calculates in data check list
Subcode；
Step C3, it is verified using the operator code that lookup obtains to initial data in the numeric data code by data protection is received,
Obtained check results are compared with the check code received in numeric data code by data protection, if identical as check code,
Step C4 is executed, it is no to then follow the steps C5；
Step C4, the initial data in the numeric data code Jing Guo data protection is extracted；
Step C5, data transmission fault, returned data error of transmission response are regarded as.
It is since the present invention uses above-mentioned technical proposal with the electric car anti-theft authentication method of communication data protection, i.e., our
Method stores identical fixed code and antitheft secret key in the electric machine controller of electric car and anti-theft, and establishes motor control
Communication connection between device and anti-theft, after detecting electric car enabling signal, electric machine controller initiates antitheft certification
Program passes through the multiple data communications of computations and combines fixed code and antitheft between electric machine controller and anti-theft
Secret key is mutually verified, and communication data protection mechanism is added in communication process, including data protection packaging and data are protected
Shield decoding, avoids corrupt data influence caused by antitheft verification process in communication process, it is antitheft to effectively improve electric car
Safety and verification process reliability.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and embodiments：
Fig. 1 is the functional block diagram of electric car anti-theft authentication method of the present invention with communication data protection.
Specific embodiment
Embodiment between electric machine controller IPU and anti-theft IMMO by the connection of CAN bus as shown in Figure 1, led to
Letter, when electric car has enabling signal, i.e., when power supply is from IGN OFF to IGN ON, it can think vehicle anti-theft authentication just
Formula starts, and the electric car anti-theft authentication method between electric machine controller IPU and anti-theft IMMO includes the following steps：
Step 1: storing identical fixed code CC64 and antitheft secret key in electric machine controller IPU and anti-theft IMMO, establish
Communication connection between electric machine controller IPU and anti-theft IMMO, after detecting electric car enabling signal IGN ON, motor
Controller IPU generates one group of original random number RN32, after this original random number RN32 is packed by data protection packaging unit,
The random number code PWP_RN32 by data protection is obtained, and sends it to anti-theft IMMO；Electric machine controller IPU simultaneously
Encrypting plaintext is collectively constituted according to the fixed code CC64 in original random number RN32, electric machine controller IPU, uses antitheft secret key SK
It carries out Encryption Algorithm and calculates generation ciphertext, take the high byte EAC_HIGH of this ciphertext as original first encryption data
IPUAuth32 obtains first by data protection after packing original first encryption data by data protection packaging unit
Encryption data code PWP_IPUAuth32, and send it to anti-theft IMMO；By the first encryption data Jing Guo data protection
After code PWP_IPUAuth32 is sent to anti-theft IMMO, electric machine controller IPU generates the low word of ciphertext after encrypting before
Fixed code CC64 in section EAC_LOW, electric machine controller IPU collectively constitutes encrypting plaintext, is encrypted again using antitheft secret key SK
It calculates and generates ciphertext, take the low byte EAR_LOW of ciphertext as original third encryption data, and anti-theft IMMO is waited to answer
It answers；
If electric machine controller IPU receives anti-theft IMMO reply data, receives rear electric machine controller IPU and execute step 5；
If receiving anti-theft IMMO data transmission fault response, initialization data protective packaging unit re-execute the steps one；If
It is unresponsive within the set time, then follow the steps eight；
Step 2: anti-theft IMMO receives the random number code PWP_ by data protection that electric machine controller IPU is sent
After RN32 and the first encryption data code PWP_IPUAuth32 by data protection, by the above-mentioned random number by data protection
Code and the first encryption data code Jing Guo data protection are decoded by data protection unwrapper unit, and it is wrong to check whether there is data transmission
Accidentally, if thening follow the steps three without error of transmission, if there is error of transmission, nine are thened follow the steps；
Step 3: the random number code PWP_RN32 by data protection that anti-theft IMMO sends electric machine controller IPU
After decoding in data protection unwrapper unit with the first encryption data code PWP_IPUAuth32 by data protection, electricity is obtained
Machine controller IPU send original random number RN32 and original first encryption data IPUAuth32, according to it is described obtain it is original
Random number R N32, the fixed code CC64 being stored in anti-theft IMMO collectively constitute encrypting plaintext, are added using antitheft secret key SK
Close calculating generates ciphertext, takes the high byte EAC_HIGH of this ciphertext as original second encryption data, and encrypts with original first
Data IPUAuth32 verification comparison, if verifying successfully, thens follow the steps four；
Step 4: anti-theft IMMO generates the low byte EAC_LOW of ciphertext, is stored in anti-theft after encrypting before
Fixed code CC64 in IMMO collectively constitutes encrypting plaintext, and using antitheft secret key SK, computations generate ciphertext again, takes ciphertext
Low byte EAR_LOW as original 4th encryption data IMMOAuth32, original 4th encryption data is passed through into data
After protective packaging unit package, the 4th encryption data code PWP_IMMOAuth32 by data protection is obtained, motor is sent to
Controller IPU, then executes step 5；
Step 5: after electric machine controller IPU receives the 4th encryption data code PWP_IMMOAuth32 by data protection, by it
It is decoded by data protection unwrapper unit, checks whether there is data transmission fault, if no data error of transmission, thens follow the steps
Six, if there is data transmission fault, then follow the steps ten；
Step 6: the 4th encryption data code by data protection that electric machine controller IPU sends anti-theft IMMO
After PWP_IMMOAuth32 is decoded in data protection unwrapper unit, original 4th encryption data IMMOAuth32 is obtained, by
Four encryption data IMMOAuth32 and the comparison of original third encryption data verify, if verifying successfully, then follow the steps seven, if verification
Failure, thens follow the steps 11；
Step 7: verification passes through, electric machine controller IPU is unlocked and is allowed to start electric car；
Step 8: the unresponsive cumulative number of electric machine controller setting anti-theft within the set time, if unresponsive number is big
It is limited in set cumulative number, thens follow the steps 12, if unresponsive number is less than set cumulative number and limits,
It is re-execute the steps one, cumulative number can be set as 3 times；
Step 9: anti-theft IMMO reinitializes data protection unwrapper unit, and anti-theft IMMO data are transmitted into mistake
Accidentally response is sent to electric machine controller IPU；
Step 10: electric machine controller IPU sends data transmission fault response to anti-theft IMMO, then initialization data is protected
Unwrapper unit reinitializes number after anti-theft IMMO receives the data transmission fault response that electric machine controller IPU is sent
According to protective packaging unit；Then original 4th encryption data IMMOAuth32 is passed through data protection packet again by anti-theft IMMO
After filling unit package, the 4th encryption data code PWP_IMMOAuth32 by data protection is obtained, electric machine controller is sent to
IPU, then execute Step 5:
It verifies the frequency of failure Step 11: electric machine controller is accumulative and sets verification frequency of failure limitation, if accumulative verification fails
Number is greater than the number limitation of setting, thens follow the steps 12, if the accumulative verification frequency of failure is less than the number limitation of setting,
It is re-execute the steps one, verification frequency of failure limitation may be set to 3 times；
Step 12: verification does not pass through, electric machine controller IPU locking does not allow for starting electric car.
Preferably, the first encryption data code and the 4th encryption data code include ordinal number counter cnt, check code SF
And initial data, the data protection packaging unit and data protection unwrapper unit respectively include identical data check list,
The data check list includes the operator code for calculating check code.
Preferably, initial data is packaged into the process packet by data protection numeric data code by the data protection packaging unit
Include following steps：
Step P1, when packing initial data every time, ordinal number counter cnt value is added 1, as new ordinal number counter cnt
Value；
Step P2, according to the value of sequence counter, operator code is searched in data check list；
Step P3, the operator code obtained using lookup is carried out the calculating of CRC16 checking algorithm to initial data, obtains check code SF；
Step P4, ordinal number counter cnt, check code SF, initial data are combined into the numeric data code Jing Guo data protection.
Preferably, the numeric data code Jing Guo data protection is decoded into the process of initial data by the data protection unwrapper unit
Include the following steps：
Step C1, every time when receiving the numeric data code by data protection, check sequence counter therein value whether be on
Value when once receiving the numeric data code by data protection adds 1, if so, C2 is thened follow the steps, it is no to then follow the steps C5；
Step C2, it according to ordinal number counter cnt in the numeric data code by data protection is received, is searched in data check list
Operator code；
Step C3, the operator code obtained using lookup carries out CRC16 to initial data in the numeric data code by data protection is received
Checking algorithm verification, obtained check results are compared with the CRC16 check code SF received in numeric data code by data protection
Compared with, if identical as CRC16 check code SF, C4 is thened follow the steps, it is no to then follow the steps C5；
Step C4, the initial data in the numeric data code Jing Guo data protection is extracted；
Step C5, data transmission fault, returned data error of transmission response are regarded as.
This method uses initiation unit of the electric machine controller IPU as antitheft certification, in electric machine controller IPU and antitheft list
Identical fixed code and antitheft secret key are stored in first IMMO, is mutually verified by computations, and are added in communication process
Enter communication data protection mechanism, communication data is checked when sending and receiving data every time, solves the number in communication process
It is influenced caused by antitheft verification process according to error, substantially reduces a possibility that causing antitheft authentification failure because of external world's influence,
The reliability in the safety and verification process of automobile burglar is effectively improved, is provided for electric car a kind of safer, reliable
Anti-theft authentication method.
Claims (4)
1. a kind of electric car anti-theft authentication method with communication data protection, it is characterised in that this method includes following step
Suddenly：
Step 1: storing identical fixed code and antitheft secret key in electric machine controller and anti-theft, electric machine controller is established
Communication connection between anti-theft, after detecting electric car enabling signal, electric machine controller generate one group it is original with
Machine data obtain the random number code by data protection after packing original random number evidence by data protection packaging unit,
And send it to anti-theft；Electric machine controller is encrypted according to original random number evidence, antitheft secret key and fixed code simultaneously
Calculate and generate original first encryption data, will original first encryption data by data protection packaging unit packaging after, obtain through
The first encryption data code of data protection is crossed, and sends it to anti-theft；Electric machine controller is according to original first encryption number
Computations are carried out according to, antitheft secret key and fixed code and generate original third encryption data, and wait the response of anti-theft；
If electric machine controller receives the reply data of anti-theft, five are thened follow the steps, if it is wrong to receive the transmission of anti-theft data
Accidentally response, then initialization data protective packaging unit, re-execute the steps one, if unresponsive within the set time, executes step
Rapid eight；
Step 2: after anti-theft receives the random number code and the first encryption data code that electric machine controller is sent, by random number code
It is decoded with the first encryption data code by data protection unwrapper unit, checks whether there is data transmission fault, if no data transmits
Mistake thens follow the steps three, if there is data transmission fault, thens follow the steps nine；
Step 3: anti-theft obtained after decoding random number code and the first encryption data code electric machine controller generation it is original with
Machine number and original first encryption data calculate according to original random number, antitheft secret key and fixed code and generate original second encryption number
According to original second encryption data and original first encryption data are compared verification, if verifying successfully, then follow the steps four；
Step 4: anti-theft is calculated according to original second encryption data, antitheft secret key and fixed code generates original 4th encryption
Data after packing original 4th encryption data by data protection packaging unit, obtain the 4th encryption by data protection
Numeric data code, and it is sent to electric machine controller；
Step 5: electric machine controller is decoded it by data protection unwrapper unit after receiving the 4th encryption data code, inspection is
It is no to have data transmission fault；
If no data error of transmission, thens follow the steps six, if there is data transmission fault, ten are thened follow the steps；
Add Step 6: electric machine controller obtains the original 4th after decoding the 4th encryption data code in data protection unwrapper unit
Original 4th encryption data and the comparison of original third encryption data are verified, if verifying successfully, then follow the steps seven by ciphertext data,
If verification failure, thens follow the steps 11；
Step 7: the antitheft authentication check of electric car passes through, electric machine controller unlocks and allows to start electric car；
Step 8: the unresponsive cumulative number of electric machine controller setting anti-theft within the set time, if unresponsive number is big
It is limited in set cumulative number, thens follow the steps 12, if unresponsive number is less than set cumulative number and limits,
It re-execute the steps one；
Step 9: anti-theft reinitializes data protection unwrapper unit, and data transmission fault response is sent to motor
Controller；
Step 10: electric machine controller sends data transmission fault response to anti-theft, then initialization data protection is unpacked single
Member reinitializes data protection packaging unit after anti-theft receives the data transmission fault response of electric machine controller transmission,
Then anti-theft obtains the 4th encryption data after again packing original 4th encryption data by data protection packaging unit
Code, and it is sent to electric machine controller, execute step 5；
It verifies the frequency of failure Step 11: electric machine controller is accumulative and sets verification frequency of failure limitation, if accumulative verification fails
Number is greater than the number limitation of setting, thens follow the steps 12, if the accumulative verification frequency of failure is less than the number limitation of setting,
It re-execute the steps one；
Step 12: the antitheft authentication check of electric car does not pass through, electric machine controller locking does not allow for starting electric car.
2. the electric car anti-theft authentication method according to claim 1 with communication data protection, it is characterised in that：Institute
It states the first encryption data code and the 4th encryption data code includes sequence counter, check code and initial data, the data are protected
Shield packaging unit and data protection unwrapper unit respectively include identical data check list, and the data check list includes using
In the operator code for calculating check code.
3. the electric car anti-theft authentication method according to claim 2 with communication data protection, it is characterised in that：Institute
It states data protection packaging unit and is packaged into initial data and include the following steps by the process of data protection numeric data code：
Step P1, when packing initial data every time, ordinal number Counter Value is added 1, the value as new sequence counter；
Step P2, according to the value of sequence counter, operator code is searched in data check list；
Step P3, verification calculating is carried out to initial data using the operator code that lookup obtains, obtains check code；
Step P4, sequence counter, check code, initial data are combined into the numeric data code by data protection.
4. the electric car anti-theft authentication method according to claim 2 with communication data protection, it is characterised in that：Institute
Data protection unwrapper unit is stated to include the following steps the process that the numeric data code Jing Guo data protection is decoded into initial data：
Step C1, every time when receiving the numeric data code by data protection, check sequence counter therein value whether be on
Value when once receiving the numeric data code by data protection adds 1, if so, C2 is thened follow the steps, it is no to then follow the steps C5；
Step C2, it according to sequence counter in the numeric data code by data protection is received, searches and calculates in data check list
Subcode；
Step C3, it is verified using the operator code that lookup obtains to initial data in the numeric data code by data protection is received,
Obtained check results are compared with the check code received in numeric data code by data protection, if identical as check code,
Step C4 is executed, it is no to then follow the steps C5；
Step C4, the initial data in the numeric data code Jing Guo data protection is extracted；
Step C5, data transmission fault, returned data error of transmission response are regarded as.
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| CN201810821329.2A CN108860062A (en) | 2018-07-24 | 2018-07-24 | Electric car anti-theft authentication method with communication data protection |
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| CN201810821329.2A CN108860062A (en) | 2018-07-24 | 2018-07-24 | Electric car anti-theft authentication method with communication data protection |
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| CN111746464A (en) * | 2020-06-30 | 2020-10-09 | 湖南行必达网联科技有限公司 | Matching code generation method and device for anti-theft verification |
| CN114701447A (en) * | 2022-04-20 | 2022-07-05 | 中国第一汽车股份有限公司 | Vehicle anti-theft authentication system, vehicle and vehicle anti-theft authentication method |
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Application publication date: 20181123 |