CN101327778B - Automobile anti-theft system and anti-theft method - Google Patents
Automobile anti-theft system and anti-theft method Download PDFInfo
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- CN101327778B CN101327778B CN200810142709XA CN200810142709A CN101327778B CN 101327778 B CN101327778 B CN 101327778B CN 200810142709X A CN200810142709X A CN 200810142709XA CN 200810142709 A CN200810142709 A CN 200810142709A CN 101327778 B CN101327778 B CN 101327778B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 29
- 239000007924 injection Substances 0.000 claims abstract description 29
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 230000006698 induction Effects 0.000 claims description 5
- 239000000446 fuel Substances 0.000 abstract description 4
- 230000001939 inductive effect Effects 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 238000012795 verification Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 238000007600 charging Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012636 effector Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The present invention relates to a vehicle anti-theft method and a vehicle anti-theft system which adopts the method to prevent the vehicle from being stolen. The vehicle anti-theft system comprises an anti-theft controller, a passive chip which is arranged on a vehicle key; an anti-theft execution unit which is linked with an electronically controlled fuel injection mechanism of the vehicle; the anti-theft controller comprises a computing processor and a memory; the computing processor is respectively linked with the memory, the anti-theft execution unit and the passive chip; the passive chip comprises a memory cell with an ID code and a radio-frequency read-write drive which is communicated with the computing processor; the computing processor is linked with an inductive loop which corresponds to the radio-frequency read-write drive; the anti-theft execution unit comprises a memory cell with a fixed code; the memory is used for storing the ID code and the fixed code. The operation of the ID code arranged on the vehicle key, the fixed code arranged on the anti-theft execution unit of the electronically controlled fuel injection mechanism of the vehicle, and the corresponding ID code and fixed code which are arranged in the anti-theft controller, is used for completing the safety inspection of the vehicle so as to start the vehicle.
Description
Technical field
The present invention relates to the automobile burglar field, relate in particular to a kind ofly in being equipped with the vehicle of electronic-controlled injection system, utilize the control electron spraying system and carry out antitheft anti-theft system and theft preventing method.
Background technology
Automobile burglar equipment mainly contains mechanical lock device, electrical lock apparatus, three kinds of Based Intelligent Control locking devices.All there is the shortcoming of safety deficiency in existing these three kinds of blocking devices, mechanical locking is traditional antitheft mode, so can open by a variety of modes, the existing mechanical lock device of empirical evidence is least to have an a kind of antitheft mode of safety, and a lot of car owners substantially no longer adopt or adopt separately mechanical lock antitheft.Electronic lock is to adopt electron key to send specific signal to the blocking device of automobile, only have blocking device to receive specific signal ability release or locking, safety is higher, but existing some equipment can crack this specific signal, pretends to be the car owner to steal automobile; The electronic lock that the electrical lock apparatus fixed password mode that mainly contains that surface current is capable in the market, manually input, card form and the asymmetric algorithm of employing carry out password authentification, these several electronic locks have the shortcoming of safety deficiency such as fixed password mode, manually input or card form electronic lock, complex operation, and password easily is decrypted.And the electronic lock that adopts asymmetric algorithm to carry out password authentification, the password and easy to operate although the system verification process is difficult for being stolen, thus easily end effector is disturbed the monitoring of hiding this system.The Based Intelligent Control locking device generally is to build on wireless communication networks, the control convenience of being located on the automobile by vehicular telephone control reaches the purpose whether the remote operation automobile locks, the car owner can open or lock by the blocking device of the real-time control automobile of vehicular telephone, and when being forced to open, automobile can in time notify the car owner by vehicular telephone, so have higher-security, but owing to having used public communication network, make the unprincipled fellow pretend to be the car owner that automobile is stolen by some other methods.
Summary of the invention
In order to overcome deficiency of the prior art, the object of the present invention is to provide a kind of anti-joyride device, utilize the ID heading code closely to verify the vehicle of controlling electronic control injection mechanism with fixed code checking double insurance, to guarantee the safety of vehicle.
For realizing that the technical scheme that its technical purpose adopts is: a kind of automotive theft proof system, comprise anti-theft controller, be installed in the passive chip on the automobile key, the antitheft execution unit that connects with automobile electrically-controlled oil injection mechanism, described anti-theft controller comprises arithmetic processor and memory device, and arithmetic processor connects with described memory device, described antitheft execution unit, described passive chip respectively; Described passive chip comprises the memory cell that stores the ID code and the radio frequency read write drive of communicating by letter with described arithmetic processor, at described arithmetic processor upper joint one induction coil corresponding with the radio frequency read write drive of passive chip, comprise the memory cell of storing fixed code in the described antitheft execution unit, described memory stores has described ID code and described fixed code.
Described automotive theft proof system, wherein: it is 90 fixed code that described memory device stores identical fixed code with control in the actr.
Described automotive theft proof system, wherein: it is 32 ID identification codes that described memory device stores identical heading code with passive chip.
Described automotive theft proof system, wherein: the output signal of described control actr is locking and release, connects the control input end of the electronic-controlled injection system of described automobile, makes respectively electronic-controlled injection system locking or the release of described automobile.
Described automotive theft proof system, wherein: described passive chip is that the model that PHILIP company produces is PCF7935AS.
Automotive theft proof system provided by the invention, utilize the ID heading code closely to verify the vehicle of controlling electronic control injection mechanism with fixed code checking double insurance, electronic-controlled injection system by the control automobile prevents that undelegated startup from reaching antitheft purpose, here passive chip represents the information of key, can be understood as correct passive chip, to represent the car owner be correct, it is car owner's identity, there is not correct automobile key can not start automobile, other anti-theft controller, be the core component of system matches and checking computations, utilize its generation stochastic signal and ID code fixed code to carry out computing and comparison calculation result.Like this, each cryptographic check just has an indefinite parameter to carry out computing, and such benefit is, can't decode by the mode of reading data flow the password of vehicle, has strengthened the property safety of automobile.
Another object of the present invention provides a kind of a kind of theft preventing method that utilizes above-mentioned anti-theft system.
For solving the problems of the technologies described above, solution of the present invention is: a kind of automobile anti-theft method, use ID code, the fixed code on the antitheft execution unit and the ID code on the anti-theft controller in the passive chip that is stored in advance on the automobile key to cooperate with the fixed code three, the electronic control injection mechanism in the vehicle that is equipped with electronic-controlled injection system is controlled; When being started, automobile may further comprise the steps:
Steps A, will insert the closed automobile power supply switch of automobile lockhole with the key of passive chip, charge to passive chip;
Step B, anti-theft controller generate the first random number and send it in the passive chip, in anti-theft controller and passive chip, utilize the first random number and ID code to carry out computing, after the passive chip computing is complete the result is sent to anti-theft controller, in anti-theft controller, the operation result of passive chip and the operation result of anti-theft controller are compared, if difference then goes to step C1 as a result, then go to step C2 if come to the same thing;
Step C1, end, automotive engine does not start;
Step C2, anti-theft controller generate the second random number, and send to antitheft execution unit, in anti-theft controller and antitheft execution unit, utilize respectively the second random number and the fixed code that is stored in wherein jointly to carry out computing, each obtains a result, antitheft execution unit is sent operation result back to anti-theft controller, in anti-theft controller, the operation result of antitheft execution unit and the operation result of anti-theft controller are compared, if difference then goes to step D1 as a result, then go to step D2 if come to the same thing;
Step D1, the locking of antitheft execution unit control electronic control injection mechanism can not start automotive engine;
Step D2, antitheft execution unit control electronic control injection mechanism start automotive engine.
Verification to password in this method mainly is that ID and fixed code are carried out verification, although ID and fixed code are all fixed, but when carrying out cryptographic check, to add respectively a random number, like this, each cryptographic check just has an indefinite parameter to carry out computing, and such benefit is, can't decode by the mode of reading data flow the password of vehicle, because each data flow has an irregular random number, each data flow is all different, increases the difficulty of code breaking.In said method, the time of utilizing automobile key normally to start automotive engine is no more than 200ms.
Below with reference to accompanying drawing, each preferred embodiment of the present invention is described in detail.
Description of drawings
Fig. 1 structured flowchart of the present invention;
The workflow diagram of Fig. 2 automotive theft proof system of the present invention;
The specific embodiment
As shown in Figure 1: the embodiment that the present invention is to provide a kind of automotive theft proof system, this system has comprised arithmetic processor 1 integrated and the anti-theft controller of memory device 6, be installed near the instrument beam in the driving compartment instrument carrier panel, anti-theft controller claims again IMMO, and the present embodiment adopts the IMMO product of DELPHI.This system also comprises the passive chip 3 that is installed on the automobile key, the antitheft execution unit 2 that connects with automobile electrically-controlled oil injection mechanism, here centered by anti-theft controller, arithmetic processor 1 in the anti-theft controller and memory device 6, antitheft execution unit 2, passive chip 3 connect; Wherein: described passive chip 3 comprises the memory cell that stores the ID code and the radio frequency read write drive of communicating by letter with described arithmetic processor, this passive chip 3 is PCF7935AS for the model that PHILIP company produces, it includes 768 EEPROM, 128 keys, 32 IDs, carry cryptographic algorithm arithmetic and logic unit and radio frequency read write drive, the data conserving time limit is 20 years.In order to communicate with passive chip, at described arithmetic processor 1 upper joint one induction coil 4 corresponding with the radio frequency read write drive of passive chip 3, comprise the memory cell of storing fixed code in the antitheft execution unit 2, described memory device 6 stores described ID code and described fixed code.Antitheft execution unit 2 is controlled electronic control injection mechanisms 5, here by control oil spout circuit start driving engine, if antitheft execution unit 2 sends a lock command for controlled oil spraying mechanism 5, electrical equipment can not start the engine in then can only opening vehicle, because the electronic control injection circuit is inoperative, so just can play anti-theft function.Because electronic fuel injection engine must be moved in computer control oil spout, therefore can't start computer just guarantees that also vehicle can't drive away, and anti-theft effect is very good, as long as guarantee that key safely can be antitheft.In the present embodiment, all store identical fixed code (SECRET KEY) in memory device 6 in the anti-theft controller and the antitheft execution unit 2, be 90 long fixed code, all store identical heading code (ID code) in memory device 6 in the anti-theft controller and the passive chip 3, have 32 long.90 SECRET KEY and 32 ID codes all are before the vehicle production line rolls off the production line, and by fixing equipment memory device 6, antitheft execution unit 2 and passive chip 3 canned datas are mated, thereby form an anti-theft system before making the three.When in the automobile starting key inserts start-up lock, rotating here, be passive chip 3 chargings at arithmetic processor 1 by induction coil 4, then produce first group of random number.And the radio frequency read write drive of first group of random number by passive chip 3 sent to passive chip 3, in passive chip 3, carry out computing with the ID code and draw a number of results, then passive chip 3 utilizes its radio frequency read write drive that this number of results is beamed back arithmetic processor, in arithmetic processor, use simultaneously the first random number and ID code to carry out computing and obtain a number of results, two number of results are compared in arithmetic processor 1, when two number of results are not identical, the expression automobile key is not this car, and automobile can not start.When two number of results are identical, arithmetic processor 1 produces the second random number, and send it to antitheft execution unit 2, in antitheft execution unit 2 inside, utilize 90 SECRET KEY and the second random number to carry out computing and produce a number of results, send to arithmetic processor 1, in arithmetic processor 1, the second random number and 90 SECRET KEY carry out computing and obtain a number of results, these two number of results are compared, if two numbers are equal, antitheft execution unit 2 sends a release signal to electronic-controlled injection system, makes 5 normal operations of electronic control injection mechanism and starts automobile.If two numbers normally do not wait, implementation controller 2 sends a locking signal to electronic fuel injection mechanism 5, makes the electronic-controlled injection system locking, can not start automobile.
As shown in Figure 2: the anti-theft system of the present embodiment utilizes the algorithm of automobile key startup automobile as follows:
Steps A, will insert the closed automobile power supply switch of automobile lockhole with the key of passive chip, charge to passive chip.
This moment, automobile key was only closed with automobile power supply switch, powered up to car electrics, powered up certainly also just for the anti-theft system of automobile, and passive chip is to be its charging by the arithmetic processor in the anti-theft controller by induction coil.
Step B, anti-theft controller generate the first random number and send it in the passive chip, utilize the first random number and ID code to carry out computing in anti-theft controller and passive chip, after the passive chip computing is complete the result are sent to anti-theft controller; In anti-theft controller, the operation result of passive chip and the operation result of anti-theft controller are compared, if difference then goes to step C1 as a result, then go to step C2 if come to the same thing.
Here anti-theft controller first random number that will generate is by the induction coil on the arithmetic processor wherein, communicate and finish with radio frequency read write drive on the passive chip random number is sent to passive chip, after in passive chip, carrying out computing, by it operation result is beamed back arithmetic processor again.Here the computing that participates in of random number can be some simple mathematical operations as utilizing the first random number and ID code to carry out AND operation or inclusive-OR operation, wait simple calculations.Also can carry out the mathematical operation of some more complicated.The ID code that is stored in the passive chip is 32 ID codes in PCF7935AS.Above process is a process of the ID code in the passive chip being carried out verification, if show that by verification the identity that starts the automobile people is right.
Step C1, end.
Here automotive engine does not start; Show the key operated automobile power source that is not with correct, can not start automotive engine this moment, but upper can use the interior electrical equipment of automobile.If also have other guard against theft and alarm system on the automobile, just can activate other guard against theft and alarm system, this car is protected.
Step C2, anti-theft controller generate the second random number, and send to antitheft execution unit, in anti-theft controller and antitheft execution unit, utilize respectively the second random number and the fixed code that is stored in wherein jointly to carry out computing, each obtains a result, antitheft execution unit is sent operation result back to anti-theft controller, in anti-theft controller, the operation result of antitheft execution unit and the operation result of anti-theft controller are compared, if difference then goes to step D1 as a result, then go to step D2 if come to the same thing.
Here it is indoor that antitheft execution unit and anti-theft controller all are installed in vehicle drive, after the source switch closure, can communicate each other, and fixed code is 90 fixed code.
Step D1, the locking of antitheft execution unit control electronic control injection mechanism can not start automotive engine.
Here because electronic control injection mechanism must send control command by automotive interior control center could work, so automotive engine can not start, but the interior electrical equipment of automobile can be worked at this moment.
Step D2, antitheft execution unit control electronic control injection mechanism start automotive engine.
The used time sum of these several processes is less than 100ms, so chaufeur only need to operate according to normal driving habit, need not take this system into account.
Claims (1)
1. the theft preventing method of an automotive theft proof system, described automotive theft proof system, comprise anti-theft controller, be installed in the passive chip on the automobile key, the antitheft execution unit that connects with automobile electrically-controlled oil injection mechanism, described anti-theft controller comprises arithmetic processor and memory device, and arithmetic processor connects with described memory device, described antitheft execution unit, described passive chip respectively; Described passive chip comprises the memory cell that stores the ID code and the radio frequency read write drive of communicating by letter with described arithmetic processor, the cryptographic algorithm arithmetic and logic unit, at described arithmetic processor upper joint one induction coil corresponding with the radio frequency read write drive of passive chip, comprise the memory cell of storing fixed code in the described antitheft execution unit, described memory stores has described ID code and described fixed code, described ID code when automobile dispatches from the factory, just be stored in the described passive chip and described memory device in, described fixed code just is stored in the antitheft execution unit of described memory device when automobile dispatches from the factory inner;
It is characterized in that: use ID code, the fixed code on the antitheft execution unit and the ID code on the anti-theft controller and fixed code three in the passive chip that is stored in advance on the automobile key to mate, the electronic control injection mechanism in the vehicle that is equipped with electronic-controlled injection system is controlled; When being started, automobile may further comprise the steps:
Steps A, will insert the closed automobile power supply switch of automobile lockhole with the key of passive chip, charge to passive chip;
Step B, anti-theft controller generate the first random number and send it in the passive chip, in anti-theft controller and passive chip, utilize the first random number and ID code to carry out computing, after the passive chip computing is complete the result is sent to anti-theft controller, in anti-theft controller, the operation result of passive chip and the operation result of anti-theft controller are compared, if difference then goes to step C1 as a result, then go to step C2 if come to the same thing;
Step C1, end, automotive engine does not start;
Step C2, anti-theft controller generate the second random number, and send to antitheft execution unit, in anti-theft controller and antitheft execution unit, utilize respectively the second random number and the fixed code that is stored in wherein jointly to carry out computing, each obtains a result, antitheft execution unit is sent operation result back to anti-theft controller, in anti-theft controller, the operation result of antitheft execution unit and the operation result of anti-theft controller are compared, if difference then goes to step D1 as a result, then go to step D2 if come to the same thing;
Step D1, the locking of antitheft execution unit control electronic control injection mechanism can not start automotive engine;
Step D2, antitheft execution unit control electronic control injection mechanism start automotive engine.
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| CN200810142709XA CN101327778B (en) | 2008-07-29 | 2008-07-29 | Automobile anti-theft system and anti-theft method |
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| CN200810142709XA CN101327778B (en) | 2008-07-29 | 2008-07-29 | Automobile anti-theft system and anti-theft method |
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| CN101327778B true CN101327778B (en) | 2013-02-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602358A (en) * | 2009-06-18 | 2009-12-16 | 奇瑞汽车股份有限公司 | A kind of engine anti-theft authentication method based on the AES128 cryptographic algorithm |
| CN103010158B (en) * | 2013-01-04 | 2015-07-22 | 北京汽车股份有限公司 | Safety certification system for automobile theft prevention |
| CN104166830B (en) * | 2014-08-22 | 2017-02-15 | 深圳市兴通物联科技有限公司 | Encryption method for chip communication and laser bar code scanning platform |
| CN104354669B (en) * | 2014-10-22 | 2017-05-31 | 重庆长安汽车股份有限公司 | A kind of method that Vehicle telematics controller carries out secure match with vehicle |
| CN105015490B (en) * | 2015-07-24 | 2017-04-12 | 安徽江淮汽车集团股份有限公司 | Authentication method for antitheft unit of engine |
| CN106427889B (en) * | 2015-08-07 | 2020-11-13 | 广州汽车集团股份有限公司 | Automobile anti-theft method and system |
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| CN1933394A (en) * | 2005-09-13 | 2007-03-21 | 阿瓦雅技术公司 | Method for undetectably impeding key strength of encryption usage for products exported to other countries |
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