WO2011069361A1 - Vehicle anti-theft system, onboard anti-theft equipment and anti-theft method - Google Patents

Abstract

A vehicle anti-theft system, an onboard anti-theft equipment and an anti-theft method belong to a crossing technical field of wireless communication and vehicle safety. The vehicle anti-theft system comprises a password verifying system for verifying whether a password for starting an authentication device is correct, an authentication system for verifying whether a user's identity is legitimate, a door lock opening and closing system for opening a door lock after the authentication system has verified that the user's identity is legitimate, and a central control system for obtaining an instruction of correct password sent by the password verifying system, controlling said authentication system to start an authentication program, and controlling said door lock opening and closing system to open the door lock after obtaining an instruction of legitimate identity sent by the authentication system. The invention has high security, simple structure and low cost, and is convenient and practical.

Description

 [Technical Field]

 The invention belongs to the technical field of wireless communication technology and automobile safety, and relates to a vehicle anti-theft system, a vehicle anti-theft device and an anti-theft method, and particularly relates to a car anti-theft system, a vehicle anti-theft device and an anti-theft method based on mobile phone bluetooth verification.

【Background technique】

 Today, cars are becoming more and more popular. Car anti-theft has become a problem that cannot be ignored in the field of car safety. The existing car anti-theft technology mainly concentrates on mechanical locks or electronic remote control locks. The principle is based on the principle of verifying the lock by key. Who knows? The key is verified by the lock, which relieves the safety control of the lock.

 The reason why the ordinary mechanical lock is not safe is that its structure is simple, and the success rate of cracking is too high. However, when the electronic remote remote control lock becomes mainstream, its security is greatly improved compared with the mechanical lock, and the difficulty of cracking is also improved. greatly increase.

 However, whether it is a traditional mechanical lock or today's electronic remote control lock, it is triggered by the key when unlocking, that is, when the key is opened, the key needs to be taken out and paired with the lock. This process is easily broken by some intentions. The illegal person of the car anti-theft security system captured the method to find a way to crack the anti-theft security system.

Although there are very few models installed with advanced electronic anti-theft systems, the higher level of anti-theft principle is still very concealed to install the lock position, or the password is very complicated to set up, even setting a dynamic password, so that each unlock The passwords are different to prevent the thief from cracking. But no matter how What kind of work is done in the lock, the method of unlocking is the same, all need to take out the key and pair it with the lock. For such unlocking method, if the anti-theft security system is not popular, the thief will not Know how to crack, but if this anti-theft security system is well known in the industry, the thief will definitely find a way to crack it. When the thief sees the owner’s unlocking method, he knows which set of anti-theft In the system, the thief will crack the anti-theft system, and its security will be greatly reduced.

 Therefore, a good car anti-theft security system must open the lock in a very concealed situation. The open unlocking method is easy to be detected by the thief, which will greatly reduce its safety.

 A set of anti-theft systems must have the following conditions:

 1. It is not necessary to take the key out to open the anti-theft system. As long as the person is close to the anti-theft system, the anti-theft system can be turned on;

 2. The key used is not special and is a common device or device in daily life. For the requirements of the first article, wireless communication technology must be adopted. At present, there are many wireless communication technologies. At present, the mainstream wireless communication technologies include infrared, Bluetooth, WIFI, mobile communication and satellite communication, etc. The advantages and disadvantages of the car anti-theft system, the inventor believes that only Bluetooth is the best communication tool between the key and the lock of the anti-theft system, because Bluetooth has high security, low cost, free communication band, and its communication distance is very suitable for car anti-theft system. .

 Mobile phones are communication devices that are needed in daily life. With the popularity of mobile phones, at least one mobile phone per person is possible. At present, most mobile phones are equipped with a Bluetooth module, so the mobile phone with Bluetooth module is used as the key to turn on the anti-theft system. It is not easy to be discovered by thieves, because it is too common in life. Even carrying a mobile phone with a Bluetooth module does not necessarily make the thief aware that the mobile phone is the key to the car.

A technique similar to the concept of the present invention is a Chinese utility model patent (application number: 03205938.8, Application date: August 08, 2003) The publicized "Car Alarm System Using Bluetooth Technology", the working principle of the car alarm disclosed in the patent is as follows: When the alarm detects the user's Bluetooth The mobile phone enters the communication range of Bluetooth, immediately confirms the identity of each other, and then starts to exchange data after confirmation. When the signal strength reaches the intensity set by the user, the anti-theft device automatically releases the anti-theft immediately; otherwise, when the vehicle is turned off, the user leaves the vehicle. And the signal strength of the hello user set the intensity immediately when the anti-theft device automatically sets the anti-theft.

 In the invention, although it is only required to use the anti-theft host and the Bluetooth phone to authenticate each other when used for the first time, when the user is near to the vehicle and ready to drive, the anti-theft device automatically cancels the anti-theft. . That is to say, there is no need to take out the operation of the mobile phone during use, as long as the person is close to the vehicle, the purpose of automatically opening the anti-theft system can be realized. For the purpose of the present invention, combined with the inventor's understanding of the Bluetooth communication technology, the inventor believes that only the Bluetooth of the anti-theft host on the car is always on, and when scanning the Bluetooth device nearby, the person is approaching. When the vehicle is in the vehicle, the Bluetooth phone carried by the person can be quickly found. If this is the case, then the Bluetooth is always at work, the power consumption will be very large, and an important problem is that when the car is on the car The anti-theft host's Bluetooth is always on and in a state of constant scanning, which provides time and opportunity for criminals to crack Bluetooth's matching passwords.

The inventors also search for other technologies similar to the present invention, such as the Chinese invention patent (application number: 200810006181 .3, application date: February 21, 2008). The public "car alarm system and the use of Bluetooth handheld devices to control the car alarm system" Method and Chinese utility model patent (application number: 200820004097.3, application date: February 03, 2008) The publicized "mobile phone-based car anti-theft device", in these two patents, in the process of removing the anti-theft system Take out the Bluetooth mobile phone, either enter the pairing password or manually operate the control command. This anti-theft system is not hidden, so the security will be greatly reduced. Instruction manual

 [Summary of the Invention]

 The purpose of the invention is to solve the deficiencies in the prior art, and propose a new car anti-theft system, a car anti-theft device and an anti-theft method based on Bluetooth verification (mainly based on mobile phone Bluetooth), the car anti-theft system and the vehicle The anti-theft device and the anti-theft method have the characteristics of good concealment, low power consumption and high security.

 The idea of the invention is this:

 To solve the above technical problem, the in-vehicle Bluetooth device in the prior art needs to be paired and connected as the slave node to the master node of the mobile phone Bluetooth device, and the car Bluetooth device is used as the master node to actively initiate a query to search for the Bluetooth near the car. The device, the mobile phone Bluetooth device acts as a slave node in response to the primary node's query and is paired with the in-vehicle Bluetooth device. On the one hand, after the car Bluetooth device as the master node masters the initiative of the query, it will make the query and pairing operation according to the timing and conditions, so the car Bluetooth device is turned on when the query operation needs to be initiated, and can be standby when not initiated. (Close the response query work) or turn off the state, which can reduce the chance that the illegal intruder cracks the password, and the security will be greatly improved. On the other hand, since the car Bluetooth device has mastered the initiative of pairing, pairing when needed, When it is needed, it is in a dormant state or in a closed state, which greatly reduces the power consumption, and its life span is also greatly improved. Moreover, since the car Bluetooth device actively initiates a query operation, the mobile phone Bluetooth device is not required to take the initiative to take out the mobile phone. The device address (BD_ADDR) of the mobile phone Bluetooth device can also be automatically sent to the in-vehicle Bluetooth device by responding to the query, and the mobile phone Bluetooth device automatically responds to the query and establishes a wireless link between the two, and automatically receives at the logical layer. Password verification, this process mobile phone Bluetooth The device is automatic (if the car Bluetooth device already stores the password information of the mobile phone Bluetooth device), the connection can be established without the need to manually operate the mobile phone Bluetooth device, so the concealment is greatly enhanced, and the security is greatly improved.

If the car Bluetooth device is the master node, actively initiate a query task, search for the hand near the car. Bluetooth device, you need a device to enable the Bluetooth device to initiate a search task, and this device is preferably a long-distance wireless communication, of course, other methods, such as car keys, a certain key, Password input and so on.

 The existing car anti-theft system has the widest application range and is the most economical car wireless remote control anti-theft system. The remote key of the system emits a weak electromagnetic wave as a transmitter, and the receiver in the car receives the electromagnetic wave signal, and the electronic controller ECU recognizes the signal code, and then the actuator of the system performs the opening/closing operation. The frequency of the transmitter is 300MHZ~450MHZ, which belongs to the high-frequency wave signal. The transmission frequency of the wave signal is fixed and can be easily captured by other devices located in its signal range. Therefore, the security system is not safe. Although the security of the anti-theft system is not high, due to its mature technology and high penetration rate, the anti-theft system is low in cost and can be used as a starting device for turning on the in-vehicle Bluetooth device. Due to the high security of Bluetooth technology, the security of the car alarm system can be greatly enhanced.

 Further, the divergence is considered to be that the verification system composed of the wireless remote control key and the in-vehicle wireless receiving device is a first identity verification system, and the verification system composed of the mobile phone Bluetooth device and the in-vehicle Bluetooth device is a second identity verification system, The first identity verification system is configured to enable the second identity verification system to perform identity verification, and the first identity verification system adopts passive identity verification, and the first identity verification system is enabled and first verified, and the second identity verification system adopts Proactive authentication, because the active authentication system is more secure than the passive authentication system, the second authentication system plays a major role in theft prevention.

 According to the above inventive concept, the present invention provides a car anti-theft system based on mobile phone Bluetooth verification, and the specific technical solutions thereof are as follows:

 A car anti-theft system, comprising:

a password verification system for verifying that the password for turning on the authentication device is correct; An authentication system for verifying that the identity of the user is legitimate;

 a door lock switch system, configured to: after the identity verification system verifies that the user identity is legal, the door lock is opened; the central control system is configured to obtain an instruction that the password verification system sends the correct password, and control the identity verification system to open the identity verification program, and obtain the After the identity verification system sends an identity legal command, the lock door switch system is controlled to open the door lock.

 The identity verification system includes:

 a Bluetooth transmitting and receiving device, configured to search for other Bluetooth devices in the Bluetooth signal range of the device and obtain a device identification code of the Bluetooth device;

 a storage device, configured to store a Bluetooth device identifier of a legitimate user;

 The analysis processing device is configured to determine whether a legitimate user exists in the range of the Bluetooth signal by comparing the obtained Bluetooth device identification code with the stored Bluetooth device identification code of the legitimate user.

 The central control system includes a processor and a counting device, wherein the counting device is configured to calculate the number of times the Bluetooth transmitting and receiving device searches, and when the number of times exceeds a certain threshold, the counting device sends and receives to the Bluetooth through the processor. The device sends an instruction to terminate the search and shut down the device.

 The identity verification system includes:

 a Bluetooth transmitting and receiving device, configured to accept a pairing request sent by another Bluetooth device in the range of the Bluetooth signal of the device, and obtain a pairing password sent by the Bluetooth device;

 a storage device, configured to store a correct password paired with the Bluetooth device;

 The analysis processing device is configured to determine whether the carrier of the Bluetooth device is a legitimate user by comparing the paired password sent by the acquired Bluetooth device with the stored correct pairing password.

The central control system includes a processor and a timing device, and the counting device is configured to calculate an instruction to obtain a correct password sent by the password verification system to obtain an instruction of the identity verification system to send an identity legal If the time is greater than a certain threshold, the timing device transmits an instruction to turn off the device to the Bluetooth transmitting and receiving device through the processor.

 The central control system includes a processor and a counting device, wherein the counting device is configured to calculate a number of times that the Bluetooth device continuously sends an incorrect pairing password to the Bluetooth transmitting and receiving device, when the number of times exceeds a certain threshold, Then, the counting device sends an instruction to turn off the device to the Bluetooth transmitting and receiving device through the processor.

 The password verification system includes:

 a password sending device, configured to send a password to the password receiving device by using a radio wave, the password sending device comprising a wireless transmitting module, a password storage module, a dynamic password generating module, and a button, wherein the password is stored in the password storage module, and the button is The triggering is sent to the dynamic password generating module for generating a dynamic password, and the dynamic password is sent to the password receiving device by the wireless transmitting module; the password receiving device is configured to receive the dynamic password sent by the password sending device;

 a password verification device, configured to verify whether the received dynamic password is correct, the password verification device includes a dynamic password decryption module, a correct password storage module, and a password comparison analysis module, where the dynamic password decryption module is configured to obtain the wireless receiving module to receive The dynamic password is processed and generated to generate a verification password. The password comparison analysis module combines the verification password and the correct password comparison analysis stored by the storage module to determine whether the received dynamic password is a correct password.

 The car anti-theft system further includes a legal identity management system for managing legal identity information, including deleting an illegal user Bluetooth device identification code, adding a legal user's Bluetooth device identification code, modifying the Bluetooth transmitting and receiving device, and the The password for pairing Bluetooth devices within the Bluetooth signal range of the device.

 The legal identity management system includes:

a display device, configured to display legal user information stored by the storage device, the legitimate user information master To include the username, the username corresponds to the device identifier of the Bluetooth device of the legitimate user. a button control device, configured to send a legal user information management instruction to the central control system, including deleting an illegal user Bluetooth identification code, adding a legal user Bluetooth identification code, modifying a Bluetooth transmitting and receiving device, and the device Bluetooth The password for the pairing of Bluetooth devices within the signal range.

 The central control system includes power control means for controlling the amount of power of the Bluetooth signal transmitted by the Bluetooth transmitting and receiving device.

 A vehicle anti-theft device, comprising:

 ARM microprocessor for data processing and instruction analysis;

 a memory coupled to the ARM microprocessor for processing data and instructions with the ARM microprocessor;

 a Bluetooth module connected to the ARM microprocessor, configured to receive a Bluetooth signal and analyze and process Bluetooth data in the Bluetooth signal, send the Bluetooth data to an ARM microprocessor for processing; and the Bluetooth module is further configured to acquire the The Bluetooth data sent by the ARM microprocessor is modulated into a Bluetooth signal transmission; the high frequency receiving module connected to the ARM microprocessor is configured to receive the password of the Bluetooth module and demodulate it, and send the demodulated password data The ARM microprocessor is analyzed as a correct password; a storage module connected to the ARM microprocessor is configured to store a Bluetooth identification code of a legitimate user and a username corresponding to the Bluetooth identification code, and also store a correct Bluetooth pairing password. ;

 a door lock switch system connected to the ARM microprocessor for acquiring a door lock switch command sent by the ARM microprocessor.

The vehicle anti-theft device further includes a brake system, a door system, an oil passage system, and a vibration sensor connected to the ARM microprocessor, and signals of the brake system, the door system, the oil passage system, and the vibration sensor are transmitted to the ARM micro The processor analyzes and processes to determine the state of the car, This controls the opening and closing of the brakes, doors and the oil system.

 The vehicle anti-theft device further includes a lamp signal system and a buzzer system connected to the ARM microprocessor, and the lamp signal system and the buzzer system are controlled by the ARM microprocessor to issue different controlled signals. To remind users.

 The in-vehicle anti-theft device further includes a liquid crystal display module connected to the ARM microprocessor, a voice prompt module connected to the ARM microprocessor, and a button touch screen control module connected to the ARM microprocessor.

 A car anti-theft method, the method comprising:

 Open the password verification system with a password;

 The password verification system starts the authentication system after password verification;

 The authentication system deactivates the security after verifying that the user's identity is legal.

 The more detailed steps of this method are:

 Obtaining the password sent by the password sending device, and verifying whether the password is correct. If it is correct, the Bluetooth transmitting and receiving device is started to search for the Bluetooth device in the Bluetooth signal of the Bluetooth transmitting and receiving device, and if not, the terminal is terminated;

 Obtain the device ID of the discovered Bluetooth device;

 Comparing the searched Bluetooth device identifier with the legal Bluetooth device identifier stored in the storage device, and determining whether there is a legitimate user in the signal range of the Bluetooth transmitting and receiving device, if there is a legitimate user to cancel the theft, if not, Then terminate and turn off the Bluetooth transmitting and receiving device.

 The method further includes:

Calculating the number of times the Bluetooth transmitting and receiving device searches for the Bluetooth device, and when the number of times exceeds a certain threshold, the legitimate Bluetooth device is not found, then the termination of the search is turned off and the identity Bluetooth transmitting and receiving device is turned off; Turning on the Bluetooth transmitting and receiving device again requires that the password verification system be re-enabled by the password. The password of the last time the password verification system is turned on is different from the password of the next time the password verification system is turned on.

 The more detailed steps of this method are:

 Obtain the password sent by the password sending device, and verify whether the password is correct. If it is correct, the Bluetooth transmitting and receiving device is turned on to receive and transmit the Bluetooth signal. If not, the terminal is terminated.

 Receiving a pairing request sent by a Bluetooth device in a Bluetooth signal range of the Bluetooth transmitting and receiving device, and acquiring a pairing password sent by the Bluetooth device;

 Comparing the obtained pairing password with the correct pairing password stored in the storage device to determine whether the pairing password is correct, and if it is correct, the anti-theft is released, and if not, the termination is terminated;

 The method further includes:

 Calculating the time when the password verification system sends the correct password command to the instruction that the identity verification system sends the identity legal command. If the time is greater than a certain threshold, the Bluetooth transmitting and receiving device is turned off to stop receiving the pairing password; And the receiving device needs to re-open the password verification system by using a password, and the password of the last time the password verification system is turned on is different from the password of the next time the password verification system is turned on.

 The method further includes:

 Calculating a number of times that the Bluetooth device continuously sends an incorrect pairing password to the Bluetooth transmitting and receiving device, when the number of times exceeds a certain threshold, turning off the Bluetooth transmitting and receiving device to stop receiving the pairing password; and turning on the Bluetooth sending and receiving again The device needs to re-enable the password verification system by using a password. The password of the last time the password verification system is turned on is different from the password of the next time the password verification system is turned on.

The legal Bluetooth device identification code stored in the storage device is deleted or added, and the Bluetooth device identification code is deleted or the added control command is remotely controlled, and the remote control link is Bluetooth. wireless signal.

 The invention has the characteristics of high safety, simple structure, low cost and convenient and practical.

[Details of the manual]

 1 is a structural block diagram of a car theft prevention system according to Embodiment 1 of the present invention;

 2 is a structural block diagram of a car theft prevention system according to Embodiment 2 of the present invention;

 3 is a structural block diagram of a car anti-theft system according to Embodiment 3 of the present invention;

 4 is a structural block diagram of a car theft prevention system according to Embodiment 4 of the present invention;

 Figure 5 is a schematic structural view of a car theft prevention device according to Embodiment 5 of the present invention;

 6 is a structural schematic diagram of a car theft prevention device according to Embodiment 6 of the present invention;

 7 is a flowchart of a car theft prevention method according to Embodiment 7 of the present invention.

 Figure 8 is a flowchart of a car theft prevention method according to Embodiment 8 of the present invention.

【detailed description】

 The present invention relates to an automobile anti-theft system. The present invention will be further illustrated and described below in conjunction with the drawings and specific embodiments.

 Example 1

 As shown in FIG. 1, a car anti-theft system includes:

 a password verification system for verifying that the password for turning on the authentication device is correct;

 An authentication system for verifying that the identity of the user is legitimate;

The identifier representing the legality of the user identity is a Bluetooth device identifier corresponding to the identity of the user, The Bluetooth device identification code is a Bluetooth device address (BD_ADDR), exists in each Bluetooth device, and the device identification code in each Bluetooth device is globally unique, so as long as the user carries the allowed Bluetooth device identification code The Bluetooth device will consider the user to be a legitimate user.

 The door lock switch system is configured to open the door lock after the identity verification system verifies that the user identity is legal, and remove the anti-theft;

 a central control system, configured to obtain a password verification system to send a correct password command, and control the identity verification system to open an identity verification program, and after the identity verification system sends an identity legal command, control the lock door switch system to open the door lock , remove theft.

 The password verification system includes:

 a password receiving device, configured to receive a password sent by the password sending device;

 A password verification device that verifies that the received password is correct.

 The password verification apparatus includes a correct password storage module and a password comparison analysis module, and the password comparison analysis module determines whether the received password is a correct password in combination with the received password and the correct password comparison analysis stored by the storage module.

 Corresponding to the password receiving device is a password transmitting device, and the password transmitting device transmits the password to the password receiving device by radio waves, the password transmitting device includes a wireless transmitting module, a password storage module and a button, and the password is stored in the password storage. In the module, it is sent to the password receiving device through the wireless transmitting module under the trigger of the button.

Since the radio wave adopts a fixed frequency, and the password receiving device is a passive receiving password, it must be in a state to be received at any time. If the password is still a fixed password, it is easy for the criminal to intercept the password information, thereby easily cracking. The password, breaking the protection of the password verification system, and starting the authentication system, so the present invention still uses dynamic cryptography, and the specific technical solutions are as follows: The password sending apparatus further includes a dynamic password generating module, configured to acquire a fixed password stored by the password storage module, and generate a dynamic password by using a certain encryption algorithm computer; correspondingly, the password verification apparatus further includes a dynamic password decryption module. And acquiring a dynamic password received by the wireless receiving module and calculating a generated verification password by using a decryption algorithm corresponding to the encryption algorithm.

 The encryption algorithm and the decryption algorithm are respectively fixed on the dynamic password generation module and the dynamic password decryption module, and can only be read, cannot be copied, and adopt anti-copy technology, that is, when an illegal user attempts to copy the encryption and decryption algorithm, Then the encryption and decryption algorithm is automatically erased. Since this technique has been disclosed, the present invention will not be described again.

 The identity verification system includes:

 a Bluetooth transmitting and receiving device, configured to search for other Bluetooth devices within the Bluetooth signal range of the Bluetooth transmitting and receiving device and obtain a device identification code of the Bluetooth device;

 The Bluetooth transmitting and receiving device includes a radio frequency, a baseband, a resource controller, a link manager, a device manager, and a Bluetooth HCI, and the Bluetooth transmitting and receiving device is equivalent to a Bluetooth host connection such as a mobile phone or a notebook computer in the mature technology. In the Bluetooth module, the Bluetooth module exchanges data with the Bluetooth host. In the present invention, the Bluetooth device identification code acquired by the Bluetooth transmitting and receiving device is transmitted to the analysis processing device through the data interface.

 a storage device, configured to store a Bluetooth device identifier of a legitimate user;

 The analysis processing device is configured to determine whether a legitimate user exists in the range of the Bluetooth signal by comparing the obtained Bluetooth device identification code with the stored Bluetooth device identification code of the legitimate user.

The analysis processing device includes a processor and a memory, and the processor may be an ARM embedded microprocessor or a single chip microcomputer, etc., the storage device is a memory chip, and the stored Bluetooth device identification code of the legitimate user is not powered off by the device. Or restart and disappear. Instruction manual

 The door lock switch system is a relatively mature system at present, and mainly comprises a door lock switch, a motor for controlling the movement of the door lock switch, and a single chip for driving the motor to rotate, the single chip receiving the control command of the central control system, driving the motor to rotate , thereby controlling the door lock to open or close.

 The central control system includes a processor, which may be an ARM embedded microprocessor or a single chip microcomputer, and is responsible for processing various data commands. The processor may of course also process the tasks processed by the analysis processing device, that is, determine the range of the Bluetooth signal. Whether it is stored in a legitimate user, at a physical level, the central control system and the analysis processing device can share one processor, but at a logical level, the central control system and the analysis processing device respectively handle different tasks, in this embodiment, The distinction between the car anti-theft system of the present invention is divided according to functional modules, which does not contradict the in-vehicle device to be described later.

 In some cases, the Bluetooth transmitting and receiving device only searches for other Bluetooth devices within its signal range, which may miss the legitimate user Bluetooth device, so it is necessary to search for several times, so the central control system further includes a counting device. For calculating the number of times the Bluetooth transmitting and receiving device searches, when the Bluetooth transmitting and receiving device has not found a legitimate user Bluetooth device at a time, the central control system controls the Bluetooth transmitting and receiving device to start the search again. Working until the number of times exceeds a certain threshold, (the ideal threshold is three times), the counting device sends an instruction to terminate the search operation to the Bluetooth transmitting and receiving device by the processor, and the Bluetooth transmitting and receiving device acquires the After the command is terminated, the search is terminated and the Bluetooth transmitting and receiving device is turned off. Turning on the authentication system again requires password verification by the password verification system, and the password verification system uses dynamic password technology. The last password is the same as the next password. , this will crack the hair for illegal users. Anti-theft system provides a high degree of difficulty.

 Example 2

In the foregoing Embodiment 1, the identity verification system determines whether there is a legitimate user by acquiring a device identification code of the Bluetooth device in the range of the Bluetooth signal, and the Bluetooth device identification code and the Bluetooth device are Correspondingly, when the Bluetooth device is not around or the Bluetooth device is insufficiently powered, even if the legitimate user cannot unlock the security, in the present embodiment, another car anti-theft system is given.

 As shown in FIG. 2, on the basis of the above embodiment 1, but different from the embodiment 1, the identity verification system includes:

 a Bluetooth transmitting and receiving device, configured to receive a pairing request sent by another Bluetooth device in the range of the Bluetooth signal of the Bluetooth transmitting and receiving device, and obtain a pairing password sent by the Bluetooth device;

 a storage device, configured to store a correct password paired with the Bluetooth device;

 The analysis processing device is configured to determine whether the carrier of the Bluetooth device is a legitimate user by comparing the paired password sent by the acquired Bluetooth device with the stored correct pairing password.

 In this embodiment, the identity verification system only detects the Bluetooth pairing password and does not detect the Bluetooth device identification code, which expands the probability of the illegal user cracking the identity verification system to a certain extent, in order to make up for the backdoor vulnerability necessary in the present embodiment. The technical solutions adopted in this embodiment are as follows:

 The central control system further includes a timing device for calculating a time for obtaining an instruction that the password verification system sends the correct password to obtain an instruction for the identity verification system to send the identity legal. If the time is greater than a certain threshold, the timing device sends the identity. An instruction for verifying a timeout of the program, the processor acquiring the instruction, and sending an instruction to the identity verification system to close the identity verification program, after the identity verification system acquires the instruction, turning off the Bluetooth transmitting and receiving device to be in a standby or off state That is, the Bluetooth and the receiving device cannot transmit the Bluetooth signal and cannot receive the Bluetooth signal. If it is necessary to pair again, the Bluetooth transmitting and receiving device needs to be turned on again through the password verification system.

The threshold of the time can be set freely, ideally 5~10 minutes, because Bluetooth uses frequency hopping technology, and if the pairing password is set to be more than 4 bytes, it takes at least 30 minutes to crack the password. Setting 5~10 minutes provides enough time for legitimate users to enter the correct password and can prevent it. Description

The illegal user cracks the Bluetooth pairing password, thereby breaking the security protection system's most secure protection against the car alarm system.

 Or the counting device is further configured to calculate a number of times that the Bluetooth device continuously sends an incorrect pairing password to the Bluetooth transmitting and receiving device, and when the number of times exceeds a certain threshold, the counting device sends a super-order instruction to the processor, After the processor acquires the instruction, it sends a shutdown command to the Bluetooth transmitting and receiving device. If it needs to be paired again, the Bluetooth transmitting and receiving device needs to be turned on again by the password verification system.

 With reference to the technical solutions of Embodiment 1 and Embodiment 2, those skilled in the art can easily think of another embodiment, that is, based on Embodiment 1, the Bluetooth transmitting and receiving apparatus is further used for receiving The Bluetooth transmitting and receiving a pairing request sent by another Bluetooth device in the Bluetooth signal range of the device and acquiring a pairing password sent by the Bluetooth device; the storage device is further configured to store a correct password paired with the Bluetooth device; the analyzing processing device further It is used to determine whether the carrier of the Bluetooth device is a legitimate user by comparing the paired password sent by the acquired Bluetooth device with the stored correct pairing password. Such technical solutions are not described herein again, but are still within the scope of the present invention.

 Example 3

In the foregoing Embodiment 1, the identifier representing the user identity is the device identifier of the Bluetooth device carried by the user, and once the Bluetooth device or the Bluetooth host carried by the user is lost, the illegal user can easily break through the identity verification system by using the Bluetooth device. The protection of the car anti-theft system of the present invention only leaves the password verification system, and the security becomes the same as that of the ordinary car wireless remote anti-theft system. Moreover, when the user's Bluetooth device or Bluetooth host representing his or her legal identity is lost, it is not necessary to purchase the same Bluetooth device as the original one, and only need to re-purchase the Bluetooth device (refer to a device with a Bluetooth module, such as a Bluetooth mobile phone, Bluetooth). Headphones, etc.), the device identification code of the Bluetooth device can be re-recorded into the storage device storing the legal user Bluetooth device identification code, thereby greatly increasing the security of the car security system, and at the same time eliminating the identity A Bluetooth device is missing and needs to be returned to the factory for repair or The trouble of reconfiguring the Bluetooth device by a professional is very convenient.

 Therefore, as shown in FIG. 3, the automobile security system of the present invention further includes a legal identity management system for managing legal identity information, including deleting an invalid user Bluetooth device identification code and increasing a Bluetooth user identification code of a legitimate user. Modify the password that the Bluetooth transmitting and receiving device pairs with other Bluetooth devices in its Bluetooth signal range.

 The legal identity management system includes:

 The display device is configured to display the legal user information stored by the storage device, where the legal user information mainly includes a user name, and the user name corresponds to the device identification code of the Bluetooth device of the legal user.

 The button control device is configured to send a legal user information management instruction to the central control system, including deleting an invalid user Bluetooth identification code, adding a legal user Bluetooth identification code, modifying a matching password, and the like.

 The display device and the button control device need not be physically connected to the processor, and need not be connected through a wired connection, and may be connected by wireless. One embodiment of the device is: the display device and the button control device are user Bluetooth hosts (with a display device on a mobile phone or a notebook computer of the Bluetooth module, the Bluetooth host of the user is connected to the processor of the central control system via a Bluetooth signal, and the Bluetooth receiving and transmitting device on the Bluetooth host and the Bluetooth transmission of the identity verification system The receiving device establishes a Bluetooth communication link.

 The manner of establishing a Bluetooth communication link is that the Bluetooth host initiates a Bluetooth pairing request to the Bluetooth transmitting and receiving device of the identity verification system, and the Bluetooth transmitting and receiving device automatically sets the correct pairing password in combination with the Bluetooth pairing password stored in the storage device. When the Bluetooth transmitting and receiving device acquires the pairing password sent by the Bluetooth host and the pairing password set by itself, the communication link is established.

After the Bluetooth host establishes a communication link with the Bluetooth transmitting and receiving device, Description

The special instructions can control the processor of the central control system to call up the legitimate user information stored by the storage device. For example, the "CKHFYHXX" can be edited by the mobile phone to the Bluetooth transmitting and receiving device. Since in the prior art, information cannot be sent through Bluetooth, it is necessary to install a set of software on the mobile phone, and the ordinary technician is in the present invention. Under the narration method, it is easy to write such a program, and currently there is software for sending a short message through Bluetooth in the prior art, so the technical solution described in the present invention can be implemented, due to the prior art, The present invention will not be described again.

 Of course, the Bluetooth host can also be a laptop with a Bluetooth module or a GPS navigator. A set of software is installed on the notebook or on the GPS navigator, and the legitimate user information stored in the storage device can be easily viewed through the notebook.

 The control principle of the software is as follows: the central control system has installed another set of controlled software as a server end as a server end, and the controlled software corresponds to the control software on the user's Bluetooth host, and establishes Bluetooth communication. After the link, the control software and the controlled software also establish a control link. Of course, in order to distinguish the Bluetooth device of the user from the pairing password of the Bluetooth transmitting and receiving device of the identity verification system, it is used to verify the identity. The legality is still used to establish a control link with the central control system, and the passwords of the two can be set differently. When the Bluetooth transmitting and receiving device of the identity verification system sends a pairing password for establishing a control link, And after the analysis processing device verifies that the password is correct, the control link is established, but the identity verification is required before the control link is established, that is, the car anti-theft system is in the anti-theft state.

Another embodiment is that the display device and the button control device are connected to the processor of the central control system via a wired data interface, that is, the display device and the button control device are located together with the processor (all are set In the vehicle, the display device is a liquid crystal display unit, and the screen size can be small. The display device is directly controlled by the processor, and the processor sends a display signal to the display device through a wired data interface. The button control device is similar to several function buttons on the MP3, Description

The same combination control deletes the illegal user Bluetooth identification code, increases the legal user Bluetooth identification code, modifies the pairing password, modifies the timing threshold of the timing device, and the like. Such an embodiment is not as good as the above embodiment. The reason is that the display device and the button control device are directly disposed in the vehicle, and it is easy for the criminal to modify the legitimate user and the illegal user information, if the information is modified, If the user does not know, the next time the anti-theft system is turned on, the Bluetooth device that is supposed to be legal will be used, and the anti-theft system cannot be turned on, and the cost of the display device and the buttons is also increased.

 Example 4

 The car anti-theft system of the present invention is superior to the conventional anti-theft system that controls the door opening only through a wireless remote control key (only a password authentication system, no Bluetooth-based authentication system):

 When the user forgets to lock the door at the time of getting off the vehicle, the traditional anti-theft system can only judge the time when the user gets off the vehicle according to the vehicle oil circuit, ignition, door and brake system integrated system. If the user forgets to lock the door, Then the system will calculate the time when the user gets off the vehicle until the door has not been locked. If the time is higher than a certain threshold, the system will automatically arm the car, and sometimes use time to judge whether the person leaves the car and Inaccurate, so it is necessary to judge whether the person actually leaves the vehicle by judging the distance between the person and the car. When the central control system determines that the user gets off the vehicle according to the oil circuit, ignition, door and brake system of the vehicle, but the door is still When it is not locked, the Bluetooth transmitting and receiving device of the authentication system is activated to detect the Bluetooth device within its Bluetooth signal range. When it finds a Bluetooth device without a legitimate user within its signal range, it automatically armes the car, and the Bluetooth signal range The general case is 10-100 meters, and Bluetooth can be adjusted according to its transmit power. The signal range, when adjusted to 10~20 meters, is just in line with the situation where the user has forgotten to lock the door and does not deliberately not lock the car for other reasons, so the safety and convenience are greatly improved.

Another reason is that when the user gets off the vehicle and is armed for the car, the blue of the authentication system The tooth sending and receiving device will do another search and query work to query the Bluetooth device within the range of 1 ~ 2 meters Bluetooth signal, in order to find out whether there is a Bluetooth host (such as mobile phone, Bluetooth headset, etc.) representing the user's identity. In the car, if the forgetting in the car not only greatly reduces the safety of the car safety system of the present invention, but also brings trouble to the user when using the Bluetooth host. The Bluetooth transmitting and receiving device controls its Bluetooth signal range by controlling Bluetooth transmit power. As shown in FIG. 4, on the basis of the foregoing embodiment 3, the central control system of the automobile anti-theft system of the present invention further includes power control means for controlling when the Bluetooth transmitting and receiving device transmits the Bluetooth signal. The power level, in the above two different cases, controls the magnitude of the different transmit powers, thereby controlling the signal range of the Bluetooth.

 In the above embodiment, the division of the automobile anti-theft system of the present invention is divided based on functional modules of a logic level, and in an actual product, an ARM microprocessor can have multiple functions, and the ARM microprocessor is physically speaking. In fact, it is a component, and from the perspective of protection, the core part of the car anti-theft system of the present invention is an in-vehicle device located above the car, and the communication connection with the in-vehicle device is mainly a wireless remote control key and the user's Bluetooth. A device with a Bluetooth module such as a mobile phone or a Bluetooth headset, and these external devices are relatively common on the one hand, and on the other hand, they can be sold independently of the in-vehicle device, so it is necessary to further elaborate the car anti-theft system of the present invention from another angle. In order to enable better protection of the in-vehicle device of the present invention.

 The structure of the car anti-theft system will be described below with a preferred embodiment:

 Example 5

 As shown in FIG. 5, a car anti-theft system includes an in-vehicle anti-theft device, and the in-vehicle anti-theft device includes:

 ARM microprocessor for data processing and instruction analysis;

a memory connected to the ARM microprocessor for processing the number together with the ARM microprocessor According to the instructions;

 a Bluetooth module connected to the ARM microprocessor, configured to receive a Bluetooth signal and analyze and process Bluetooth data in the Bluetooth signal, send the Bluetooth data to an ARM microprocessor for processing; and the Bluetooth module is further configured to acquire the The Bluetooth data sent by the ARM microprocessor is modulated into a Bluetooth signal transmission; the high frequency receiving module connected to the ARM microprocessor is configured to receive the password of the Bluetooth module and demodulate it, and send the demodulated password data The ARM microprocessor is analyzed as a correct password; a storage module connected to the ARM microprocessor is configured to store a Bluetooth identification code of a legitimate user and a username corresponding to the Bluetooth identification code, and also store a correct Bluetooth pairing password. ;

 a brake system, a door system, an oil system, a level sensor, and a vibration sensor connected to the ARM microprocessor, and signals of the brake system, the door system, the oil system, the level sensor, and the vibration sensor are transmitted to the ARM microprocessor Analytical processing to determine the state of the car, thereby controlling the opening and closing of the brakes, doors and oil system.

 The vehicle anti-theft device further includes a lamp signal system and a buzzer system connected to the ARM microprocessor, and the lamp signal system and the buzzer system are controlled by the ARM microprocessor to issue different controlled signals. To remind users.

 The in-vehicle anti-theft device further includes a liquid crystal display module connected to the ARM microprocessor, a voice prompt module connected to the ARM microprocessor, and a button control module connected to the ARM microprocessor.

 The car anti-theft system further includes a Bluetooth device for transmitting identity verification information (including a Bluetooth device identification code and a pairing password) to the in-vehicle anti-theft device, the Bluetooth device being a device having a Bluetooth module, including a Bluetooth-enabled mobile phone, a notebook, and a GPS. And headphones, etc.

A wireless remote control key for transmitting a dynamic password to a high frequency receiving module of the in-vehicle anti-theft device is also included. The wireless remote control key comprises a high frequency transmitting module, a fixed password storage module and a dynamic password generating module, and a fixed code storage module, configured to store the fixed code and send the fixed code to the dynamic password generating module under the trigger of the keyboard; dynamic password generation a module, configured to acquire the fixed password and generate a dynamic password by using a certain encryption algorithm computer; and a high frequency transmitting module, configured to modulate the dynamic password into a wireless signal and send the same.

 Example 6

 As shown in FIG. 6, when the in-vehicle anti-theft device does not set a liquid crystal display module, a voice prompt module, and a button control module, it is necessary to borrow a Bluetooth device other than the in-vehicle device to establish a Bluetooth communication and control link to delete, modify, or add storage. Data such as Bluetooth identification code, user name, and pairing password in the storage module.

 There are two types of pairing passwords, one is a pairing password for verifying the validity of the identity, and the other is a pairing password for establishing a communication and control link, and only the correct pairing password for establishing and controlling the link is input. A Bluetooth device other than the in-vehicle device can establish a communication and control link with the in-vehicle device, and data in the storage module of the in-vehicle device can be transmitted to and controlled by the Bluetooth device.

 Of course, in order to improve the security of the wireless communication and control link, the security level setting can be increased, for example, only a legitimate Bluetooth device (ie, having a valid Bluetooth device identification code) can be set up to establish communication and control links with the in-vehicle device.

The car anti-theft security system further includes a Bluetooth mobile phone or a Bluetooth notebook, and the Bluetooth mobile phone or the Bluetooth notebook is used to establish a communication and control link with the in-vehicle anti-theft device, and borrow the liquid crystal display module and voice of the Bluetooth mobile phone or the Bluetooth notebook. The prompt module and the button control module perform operations such as deleting, modifying, or adding a Bluetooth identification code, a user name, and a pairing password stored in the storage module. The above embodiment provides a detailed description and explanation of the automobile anti-theft system of the present invention. The present invention also provides an anti-theft method for a vehicle. In fact, those skilled in the art can easily summarize and summarize the description of the anti-theft system of the automobile according to the above description. In order to further enable the specification to support the claims, the car anti-theft method of the present invention will be further illustrated and described below in conjunction with the above embodiments:

 Example 7

 As shown in FIG. 7, a car anti-theft method, the method includes:

 Open the password verification system with a password;

 The password verification system starts the authentication system after password verification;

 The authentication system deactivates the security after verifying that the user's identity is legal.

 The more detailed steps of this method are:

 Obtaining the password sent by the password sending device, and verifying whether the password is correct. If it is correct, the Bluetooth transmitting and receiving device is started to search for the Bluetooth device in the Bluetooth signal of the Bluetooth transmitting and receiving device, and if not, the terminal is terminated;

 Obtain the device ID of the discovered Bluetooth device;

 Comparing the searched Bluetooth device identifier with the legal Bluetooth device identifier stored in the storage device, and determining whether there is a legitimate user in the signal range of the Bluetooth transmitting and receiving device, if there is a legitimate user to cancel the theft, if not, Then terminate and turn off the Bluetooth transmitting and receiving device.

 The method further includes:

Calculating the number of times the Bluetooth transmitting and receiving device searches for the Bluetooth device, determining whether the number of times exceeds a certain threshold, and when the number of times exceeds a certain threshold and has not found a legitimate Bluetooth device, then the termination of the search is stopped and the identity Bluetooth transmission and reception is turned off. Device. Turning on the Bluetooth transmitting and receiving device again requires that the password verification system be re-enabled by the password. The password of the last time the password verification system is turned on is different from the password of the next time the password verification system is turned on.

 The legal Bluetooth device identification code stored in the storage device can be deleted or added.

 The deletion or addition of the Bluetooth device identification code may be remotely controlled, and the remote control link is a Bluetooth wireless signal.

 Example 8

 On the basis of the above-mentioned Embodiment 7, unlike Embodiment 7, a more detailed step of the method is as shown in Fig. 8:

 Obtain the password sent by the password sending device, and verify whether the password is correct. If it is correct, the Bluetooth transmitting and receiving device is turned on to receive and transmit the Bluetooth signal. If not, the terminal is terminated.

 Receiving a pairing request sent by a Bluetooth device in a Bluetooth signal range of the Bluetooth transmitting and receiving device, and acquiring a pairing password sent by the Bluetooth device;

 Comparing the obtained pairing password with the correct pairing password stored in the storage device to determine whether the pairing password is correct, and if it is correct, the anti-theft is released, and if not, the termination is terminated;

 The method further includes:

 Calculate the time when the password verification system sends the correct password to the instruction to obtain the legal order of the identity verification system, and judge whether the time exceeds a certain threshold. If the time is greater than a certain threshold, the Bluetooth transmitting and receiving device is stopped to stop receiving. Pairing the password; Turning on the Bluetooth transmitting and receiving device again requires that the password verification system be turned on again by the password, and the password of the last time the password verification system is turned on is different from the password for the next time the password verification system is turned on.

 Alternatively, the method further comprises:

Calculating that the Bluetooth device continuously sends an incorrect pairing password to the Bluetooth transmitting and receiving device The number of times, when the number of times exceeds a certain threshold, the Bluetooth transmitting and receiving device is turned off to stop receiving the pairing password; the Bluetooth transmitting and receiving device is turned on again, and the password verification system is required to be re-enabled by the password, and the password of the last password authentication system is turned on. It is different from the password for the next password authentication system.

 The password that the Bluetooth transmitting and receiving device pairs with the Bluetooth device can be deleted, added or modified. The control command for deletion, addition or modification of the pairing password can be remotely controlled, and the remote control link is a Bluetooth wireless signal. Through the explanation and illustration of the above detailed embodiments, those skilled in the art can understand the idea of the present invention to make some simple modifications and improvements according to the above embodiments, but as long as it is deformed and improved, as long as it Modifications and improvements are within the scope of the inventive concept and should be protected by the invention.

Claims

Claim 1. A car alarm system, comprising:  a password verification system for verifying that the password for turning on the authentication device is correct;  An authentication system for verifying that the identity of the user is legitimate;  a door lock switch system, configured to: after the identity verification system verifies that the user identity is legal, the door lock is opened; the central control system is configured to obtain an instruction that the password verification system sends the correct password, and control the identity verification system to open the identity verification program, and obtain the After the identity verification system sends an identity legal command, the lock door switch system is controlled to open the door lock.  2. The automobile anti-theft system according to claim 1, wherein the identity verification system comprises:  a Bluetooth transmitting and receiving device, configured to search for other Bluetooth devices in the Bluetooth signal range of the device and obtain a device identification code of the Bluetooth device;  a storage device, configured to store a Bluetooth device identifier of a legitimate user;  The analysis processing device is configured to determine whether a legitimate user exists in the range of the Bluetooth signal by comparing the obtained Bluetooth device identification code with the stored Bluetooth device identification code of the legitimate user.  3. The automobile anti-theft system according to claim 2, wherein the central control system comprises a processor and a counting device, wherein the counting device is configured to calculate the number of times the Bluetooth transmitting and receiving device searches, when the number of times Exceeding a certain threshold, the counting device sends an instruction to the Bluetooth transmitting and receiving device to terminate the search and close the device through the processor.  4. The automobile anti-theft system according to claim 1, wherein the identity verification system comprises: a Bluetooth transmitting and receiving device, configured to accept a pairing request sent by another Bluetooth device within the Bluetooth signal range of the device, and obtain a pairing password sent by the Bluetooth device; Claim  a storage device, configured to store a correct password paired with the Bluetooth device;  The analysis processing device is configured to determine whether the carrier of the Bluetooth device is a legitimate user by comparing the paired password sent by the acquired Bluetooth device with the stored correct pairing password.  The automobile anti-theft system according to claim 4, wherein the central control system comprises a processor and a timing device, and the counting device is configured to calculate an instruction for acquiring a password by the password verification system to obtain the correct password. The time when the identity verification system sends an identity legal command, if the time is greater than a certain threshold, the timing device transmits an instruction to turn off the device to the Bluetooth transmitting and receiving device through the processor.  6. The automobile antitheft system according to claim 4, wherein the central control system comprises a processor and a counting device, wherein the counting device is configured to calculate that the Bluetooth device transmits and to the Bluetooth The number of times the receiving device continuously transmits the wrong pairing password. When the number of times exceeds a certain threshold, the counting device transmits an instruction to turn off the device to the Bluetooth transmitting and receiving device through the processor.  The car anti-theft system according to any one of claims 1 to 6, wherein the password verification system comprises:  a password sending device, configured to send a password to the password receiving device by using a radio wave, the password sending device comprising a wireless transmitting module, a password storage module, a dynamic password generating module, and a button, wherein the password is stored in the password storage module, and the button is The triggering is sent to the dynamic password generating module for generating a dynamic password, and the dynamic password is sent to the password receiving device by the wireless transmitting module; the password receiving device is configured to receive the dynamic password sent by the password sending device; a password verification device, configured to verify whether the received dynamic password is correct, the password verification device includes a dynamic password decryption module, a correct password storage module, and a password comparison analysis module, where the dynamic password decryption module is configured to obtain the wireless receiving module to receive Dynamic password and process generated verification password, Claim The password comparison analysis module combines the verification password and the correct password comparison analysis stored by the storage module to determine whether the received dynamic password is a correct password.  8. The automobile anti-theft system according to claim 7, wherein the car anti-theft system further comprises a legal identity management system for managing legal identity information, including deleting an illegal user Bluetooth device identification. Code, increase the Bluetooth user ID of the legitimate user, modify the password that the Bluetooth transmitting and receiving device pairs with the Bluetooth device in the Bluetooth signal range of the device.  9. The automobile anti-theft system according to claim 8, wherein the legal identity management system comprises:  The display device is configured to display the legal user information stored by the storage device, where the legal user information mainly includes a user name, and the user name corresponds to the device identification code of the Bluetooth device of the legal user.  a button control device, configured to send a legal user information management instruction to the central control system, including deleting an illegal user Bluetooth identification code, adding a legal user Bluetooth identification code, modifying a Bluetooth transmitting and receiving device, and the device Bluetooth The password for the pairing of Bluetooth devices within the signal range.  The central control system includes power control means for controlling the amount of power of the Bluetooth signal transmitted by the Bluetooth transmitting and receiving device.  10. An in-vehicle anti-theft device, comprising:  ARM microprocessor for data processing and instruction analysis;  a memory coupled to the ARM microprocessor for processing data and instructions with the ARM microprocessor; a Bluetooth module connected to the ARM microprocessor, configured to receive a Bluetooth signal and analyze and process Bluetooth data in the Bluetooth signal, send the Bluetooth data to an ARM microprocessor for processing; and the Bluetooth module is further configured to acquire the Bluetooth data sent by the ARM microprocessor and modulated into Bluetooth signal transmission; Claim  a high frequency receiving module connected to the ARM microprocessor, configured to receive a password for turning on the Bluetooth module and demodulate, and send the demodulated password data to the ARM microprocessor to analyze whether it is a correct password; and the ARM a storage module connected to the microprocessor, configured to store a Bluetooth identification code of the legal user and a username corresponding to the Bluetooth identification code, and also store the correct Bluetooth pairing password;  a door lock switch system connected to the ARM microprocessor for acquiring a door lock switch command sent by the ARM microprocessor.  11 . The vehicle anti-theft device according to claim 10 , wherein the vehicle anti-theft device further comprises a brake system, a door system, an oil passage system, and a vibration sensor connected to the ARM microprocessor. The signals of the brake system, the door system, the oil circuit system, and the vibration sensor are transmitted to the ARM microprocessor for analysis and processing to determine the state of the vehicle, thereby controlling the opening and closing of the brakes, the door, and the oil passage system.  12 . The vehicle anti-theft device according to claim 11 , further comprising a vehicle light signal system and a buzzer system connected to the ARM microprocessor, the vehicle light signal system And the buzzer system is controlled by the ARM microprocessor to issue different controlled signals to alert the user.  The in-vehicle anti-theft device according to any one of claims 1 to 12, wherein the in-vehicle anti-theft device further comprises a liquid crystal display module connected to the ARM microprocessor, and the ARM micro A voice prompt module connected to the processor, and a touch screen control module connected to the ARM microprocessor. 14. A method of anti-theft of a car, the method comprising: Claim  The authentication system deactivates the security after verifying that the user's identity is legal.  15. The automobile theft prevention method according to claim 14, wherein the method has a more detailed step of:  Obtaining the password sent by the password sending device, and verifying whether the password is correct. If it is correct, the Bluetooth transmitting and receiving device is started to search for the Bluetooth device in the Bluetooth signal of the Bluetooth transmitting and receiving device, and if not, the terminal is terminated;  Obtain the device ID of the discovered Bluetooth device;  Comparing the searched Bluetooth device identifier with the legal Bluetooth device identifier stored in the storage device, and determining whether there is a legitimate user in the signal range of the Bluetooth transmitting and receiving device, if there is a legitimate user to cancel the theft, if not, Then terminate and turn off the Bluetooth transmitting and receiving device.  The car anti-theft method according to claim 15, wherein the method further comprises:  Calculating the number of times the Bluetooth transmitting and receiving device searches for the Bluetooth device, and when the number of times exceeds a certain threshold, the legitimate Bluetooth device is not found, then the termination of the search is turned off and the identity Bluetooth transmitting and receiving device is turned off; The receiving device needs to re-open the password verification system by using a password, and the password of the last time the password verification system is turned on is different from the password of the next time the password verification system is turned on.  The automobile anti-theft method according to claim 14, wherein the method has a more detailed step of:  Obtain the password sent by the password sending device, and verify whether the password is correct. If it is correct, the Bluetooth transmitting and receiving device is turned on to receive and transmit the Bluetooth signal. If not, the terminal is terminated. Receiving a pairing request sent by a Bluetooth device in a Bluetooth signal range of the Bluetooth transmitting and receiving device, and acquiring a pairing password sent by the Bluetooth device; Claim  Comparing the obtained pairing password with the correct pairing password stored in the storage device to determine whether the pairing password is correct, and if it is correct, the anti-theft is released, and if not, the termination is terminated;  18. The automobile theft prevention method according to claim 17, wherein the method further comprises:  Calculating the time when the password verification system sends the correct password command to the instruction that the identity verification system sends the identity legal command. If the time is greater than a certain threshold, the Bluetooth transmitting and receiving device is turned off to stop receiving the pairing password; And the receiving device needs to re-open the password verification system by using a password, and the password of the last time the password verification system is turned on is different from the password of the next time the password verification system is turned on.  19. The automobile theft prevention method according to claim 17, wherein the method further comprises:  Calculating a number of times that the Bluetooth device continuously sends an incorrect pairing password to the Bluetooth transmitting and receiving device, when the number of times exceeds a certain threshold, turning off the Bluetooth transmitting and receiving device to stop receiving the pairing password; and turning on the Bluetooth sending and receiving again The device needs to re-enable the password verification system by using a password. The password of the last time the password verification system is turned on is different from the password of the next time the password verification system is turned on.  The car theft prevention method according to any one of claims 14 to 19, wherein the legal Bluetooth device identification code stored in the storage device is deleted or added, and the Bluetooth device identification code is deleted or added. The control command is remotely controlled, and the remote control link is a Bluetooth wireless signal.