TWI753360B - Electric vehicle and anti-theft method thereof - Google Patents

Abstract

The present disclosure provides an anti-theft method of an electric vehicle, which includes steps as follows. A private key of a vehicle key is read. The private key is used to decrypt the ciphertext, so as to serve a basis of starting the motor.

Description

Electric vehicle and anti-theft method

The present invention relates to an apparatus and method, and particularly to an electric vehicle and its anti-theft method.

Electric vehicles generally refer to vehicles that are driven on the road by electric motors or traction motors. Electric vehicles include electric vehicles, electric trains, electric scooters, electric bicycles, etc.

However, common anti-theft measures, such as disc brake locks, large locks, faucet locks and magnet locks, still cannot effectively solve the problem of theft.

The present invention provides an electric vehicle and an anti-theft method thereof, which improves the problems of the prior art.

In an embodiment of the present invention, the electric vehicle provided by the present invention includes a motor, a communication device, and a controller, and the controller is electrically connected to the communication device and the motor. The communication device reads the private key of the vehicle key, and the controller uses the private key to decrypt the ciphertext, which is used as the basis for starting the motor.

In an embodiment of the present invention, the controller is a motor control The firmware of the motor controller is preloaded with a preset plaintext. The controller includes a motor control circuit, a first storage and a decryption device. The motor control circuit is electrically connected to the motor, and the decryption device is electrically connected to the motor control circuit. The first storage stores the preset ciphertext, and the decryption device uses the private key to decrypt the preset ciphertext in the first storage to obtain the first plaintext, and then judges whether the first plaintext matches the preset plaintext.

In an embodiment of the present invention, the electric vehicle further includes an identification device. The identification device receives the identification information, and then determines whether the identification information is consistent with a preset verification data.

In an embodiment of the present invention, the electric vehicle further includes a battery, and the battery is electrically connected to the decryption device. The battery has a second storage, the second storage stores the preset ciphertext of the second storage, the decryption device uses the private key to decrypt the preset ciphertext to obtain a second plaintext, and then judges whether the second plaintext is the same as the preset ciphertext. The plaintext matches.

In an embodiment of the present invention, when the first plaintext matches the default plaintext, when the identification information matches the default verification data, and when the second plaintext matches the default plaintext, the motor control circuit starts the motor.

In an embodiment of the present invention, the anti-theft method for an electric vehicle provided by the present invention includes the following steps. Read the private key of the vehicle key; use the private key to decrypt the ciphertext and use it as the basis for starting the motor.

In an embodiment of the present invention, the anti-theft method further includes: preloading a default plaintext through the firmware of the controller; storing the default ciphertext in advance through the controller; decrypting the default ciphertext of the controller by using the private key to obtain A first plaintext is generated, and then it is judged whether the first plaintext is consistent with the preset plaintext.

In an embodiment of the present invention, the anti-theft method further comprises: connecting The identification information is received, and then it is judged whether the identification information is consistent with a preset verification data.

In an embodiment of the present invention, the anti-theft method further comprises: storing a preset ciphertext in advance through a battery, decrypting the preset ciphertext of the battery with a private key to obtain a second plaintext, and then judging whether the second plaintext is the same as the preset ciphertext The plaintext matches.

In an embodiment of the present invention, the anti-theft method further includes: when the first plaintext matches the default plaintext, when the identification information matches the default verification data, and when the second plaintext matches the default plaintext, the controller start the motor.

To sum up, the technical solution of the present invention has obvious advantages and beneficial effects compared with the prior art. The technical scheme of the present invention can not only reduce the theft rate of the whole vehicle, but also prevent thieves from stealing the vehicle only for its parts, so that the thieves are not interested in it, thus achieving the goal of low theft rate of electric vehicles.

The above description will be described in detail in the following embodiments, and further explanations will be provided for the technical solutions of the present invention.

In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the descriptions of the appended symbols are as follows:

100: Electric Vehicle

110: Motor

120: Communication device

130: Controller

131: Motor control circuit

132: First Storage

133: Decryption Device

140: Identification device

150: battery

152: Second Storage

170: Vehicle Key

200: Anti-theft method

S201, S202: steps

In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the accompanying drawings are described as follows:

FIG. 1 is a block diagram of an electric vehicle according to an embodiment of the present invention; and

FIG. 2 is a flowchart of an anti-theft method for an electric vehicle according to an embodiment of the present invention.

For a more detailed and complete description of the present invention, reference may be made to the accompanying drawings and the various embodiments described below, wherein the same numbers in the drawings represent the same or similar elements. On the other hand, well-known elements and procedures have not been described in the embodiments in order not to unnecessarily limit the present invention.

In the embodiments and the scope of the patent application, the description related to "connection" can generally refer to that an element is indirectly coupled to another element through other elements, or that an element is directly connected to another element without passing through other elements.

In the embodiments and the scope of the patent application, the description related to "connection" can generally refer to an element that indirectly communicates with another element by wire and/or wireless through other elements, or that an element does not need to pass through other elements to physically communicate with each other. connected to another element.

In the embodiments and the scope of the patent application, unless there is a special limitation on the article in the context, "a" and "the" may refer to a single or plural.

As used herein, "about", "approximately" or "approximately" is used to modify any quantity that may vary slightly, but which does not alter its essence. If there is no special description in the embodiment, it means that the error range of the numerical value modified by "about", "approximately" or "approximately" is generally allowed within 20%, preferably within 10%. within, and more preferably within five percent.

FIG. 1 is a block diagram of an electric vehicle 100 according to an embodiment of the present invention. As shown in FIG. 1 , the electric vehicle 100 may include a motor 110 , a communication device 120 , a controller 130 and a battery 150 . For example, the communication device 120 can be a near field communication device, and the vehicle key 170 has a near field communication mark sign. Structurally, the controller 130 is electrically connected to the communication device 120 , the motor 110 and the battery 150 .

In practice, when the vehicle manufacturer produces the electric vehicle 100, a string of a specific length is used as the plaintext (no need to be kept secret, it is only used as a parameter to be encrypted). Generate a set of unique public key and private key through the key software tool, and then use the public key to encrypt the plaintext into ciphertext, and write them into the storage devices of the micro-control unit of the electronic components such as the battery 150 and the controller 130, respectively. With anti-tamper (anti-tamper) function, can protect data from being copied. In practice, the electric vehicle 100 can be a vehicle, and the public key/private key of each vehicle is different and unique, so the public key/private key of other vehicles or parts cannot be decrypted in this vehicle.

Write the private key to the vehicle key 170. The public key is written to the cloud server. The public key here is different from traditional usage and is not expected to be made public. When purchasing an electric vehicle, the user needs to connect to the cloud server for registration, and link the public key stored in the cloud server with the account via the private key in the vehicle key 170 . In practice, the public key is placed in the cloud server, mainly in the event of a failure, aging or loss of parts in the future, the ciphertext can be generated by the public key and stored in the new parts in the depot.

When the user wants to start the electric vehicle 100, when the user starts the electric vehicle 100, the user moves the vehicle key 170 close to the communication device 120 of the electric vehicle 100, and the communication device 120 reads the private key of the vehicle key 170 and stores the private key 170 of the vehicle. The key is transmitted to the controller 130 , and the controller 130 uses the private key to decrypt the ciphertext, which is used as the basis for starting the motor 110 .

In FIG. 1, the controller 130 includes a motor control circuit 131 , a first storage 132 and a decryption device 133 . Structurally, the motor control circuit 131 is electrically connected to the motor 110 , and the decryption device 133 is electrically connected to the motor control circuit 131 . For example, the decryption device 133 can be firmware and/or a circuit, and the battery 150 is electrically connected to the decryption device 133 .

The controller 130 is a motor controller, the firmware of the motor controller is preloaded with a preset plaintext, the first storage 132 stores the preset ciphertext, and the decryption device 133 uses the private key to decrypt the preset ciphertext in the first storage 132 to The first plaintext is obtained, and then it is judged whether the first plaintext is consistent with the preset plaintext. If the vehicle key 170 is correct, the above-mentioned character string with a specific length (ie, plain text) can be solved. The purpose of this process is to prevent the main body of the electric vehicle 100 from being stolen.

In FIG. 1, the battery 150 has a second storage 152, the second storage 152 stores the preset ciphertext, and the decryption device 133 uses the private key to decrypt the preset ciphertext in the second storage 152 to obtain the second plaintext, Then, it is judged whether the second plaintext matches the preset plaintext. This process is mainly to prevent the use of stolen parts (eg, battery 150 ).

In practice, the battery 150 and the controller 130 in the original design of this case store the same preset ciphertext, so the vehicle key 170 only needs to store a private key.

In an embodiment of the present invention, when the first plaintext matches the predetermined plaintext, and when the second plaintext matches the predetermined plaintext, the motor control circuit 131 starts the motor 110 .

In FIG. 1 , the electric vehicle 100 may optionally include an identification device 140 . For example, the identification device 140 may be a biometric identification device (eg, a fingerprint identification device, a retinal identification device, etc.) and/or an electronic password. Code lock device. The identification device 140 receives the identification information, and then determines whether the identification information is consistent with the preset verification data.

In an embodiment of the present invention, the motor control circuit 131 starts the motor 110 when the first plaintext matches the default plaintext, when the identification information matches the default verification data, and when the second plaintext matches the default plaintext.

In order to further describe the anti-theft method of the electric vehicle 100, please refer to FIGS. 1-2 at the same time. FIG. 2 is a flowchart of an anti-theft method 200 of the electric vehicle 100 according to an embodiment of the present invention. As shown in FIG. 2, the machine management method 200 includes steps S201 and S202 (it should be understood that the steps mentioned in this embodiment can be adjusted according to actual needs, unless the sequence is specifically stated. sequence, even concurrently or partially).

In step S201, the private key of the vehicle key is read. In step S202, the ciphertext is decrypted using the private key, which is used as the basis for starting the motor.

In the anti-theft method 200, a preset plaintext is preloaded through the firmware of the controller 130; the preset ciphertext is prestored through the controller 130; the preset ciphertext of the controller 130 is decrypted by using the private key to obtain a first plaintext , and then determine whether the first plaintext matches the preset plaintext. If the vehicle key 170 is correct, the above-mentioned character string with a specific length (ie, plain text) can be solved. The purpose of this process is to prevent the main body of the electric vehicle 100 from being stolen.

In the anti-theft method 200 , the predetermined ciphertext is pre-stored by the battery 150 , the predetermined ciphertext of the battery 150 is decrypted using the private key to obtain a second plaintext, and then it is determined whether the second plaintext matches the second predetermined plaintext. This process is mainly to prevent the use of stolen parts (eg, battery 150 ).

In the anti-theft method 200, identification information (eg, password, biometric feature, etc.) is received, and then it is determined whether the identification information is consistent with the preset verification data. When the first plaintext matches the default plaintext, when the identification information matches the default verification data, and when the second plaintext matches the default plaintext, the controller 130 starts the motor 110 .

To sum up, the technical solution of the present invention has obvious advantages and beneficial effects compared with the prior art. The technical scheme of the present invention can not only reduce the theft rate of the whole vehicle, but also prevent thieves from stealing the vehicle only for its parts, so that the thieves are not interested in it, thus achieving the goal of low theft rate of electric vehicles.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the appended patent application.

200: Anti-theft method

S201, S202: steps

Claims (10)

An electric vehicle includes: a controller; a motor electrically connected to the controller; a battery electrically connected to the controller; and a communication device electrically connected to the controller and the motor, the communication device reading Take a private key of a carrier key, wherein the private key and a corresponding public key are generated by a string through a key software tool, the public key encrypts a preset plaintext into a preset ciphertext, the preset The plaintext and the preset ciphertext are pre-stored in the battery and the controller, the public key is pre-stored in a cloud server, the private key is pre-stored in the vehicle key, and the controller uses the transmission from the vehicle key. The obtained private key decrypts the preset ciphertext to obtain a plaintext, and when the plaintext decrypted by the private key matches the preset plaintext, the controller starts the motor. The electric vehicle of claim 1, wherein the controller is a motor controller, the firmware of the motor controller is preloaded with the preset plaintext, and the controller comprises: a motor control circuit electrically connected to the motor ; a first storage for storing the preset ciphertext; and a decryption device electrically connected to the motor control circuit, the decryption device decrypts the preset ciphertext of the first storage by using the private key to obtain a The first plaintext, and then determine whether the first plaintext is consistent with the default plaintext, wherein The plaintext includes the first plaintext. The electric vehicle according to claim 2, further comprising: an identification device that receives identification information, and then determines whether the identification information is consistent with a preset verification data. The electric vehicle of claim 3, wherein the battery is electrically connected to the decryption device, the battery has a second storage, the second storage stores a preset ciphertext, and the decryption device decrypts using the private key The predetermined ciphertext of the second storage is to obtain a second plaintext, and then it is judged whether the second plaintext is consistent with the predetermined plaintext, wherein the plaintext further includes the second plaintext. The electric vehicle of claim 4, wherein when the first plaintext matches the default plaintext, when the identification information matches the default verification data, and when the second plaintext matches the default plaintext , the motor control circuit starts the motor. An anti-theft method for an electric vehicle, the anti-theft method comprises: reading a private key of a vehicle key, wherein the private key and a corresponding public key are generated by a string through a key software tool, the public key Encrypt a preset plaintext into a preset ciphertext, the preset plaintext and the preset ciphertext are pre-stored in a battery and a controller of the electric vehicle, the public key is pre-stored in a cloud server, the private the key is pre-stored in the vehicle key; and Decrypt the default ciphertext by using the private key transmitted from the vehicle key through the controller to obtain a plaintext, and when the plaintext decrypted by the private key matches the default plaintext, use the controller to decrypt the default ciphertext The controller activates a motor of the electric vehicle. The anti-theft method according to claim 6, further comprising: pre-loading the default plaintext through the firmware of the controller; pre-storing the default ciphertext through the controller; and decrypting the controller by using the private key The ciphertext is preset to obtain a first plaintext, and then it is determined whether the first plaintext is consistent with the preset plaintext, wherein the plaintext includes the first plaintext. The anti-theft method of claim 7 further comprises: receiving identification information, and then determining whether the identification information is consistent with a preset verification data. The anti-theft method according to claim 8, further comprising: storing the preset ciphertext in advance through the battery, decrypting the preset ciphertext of the battery with the private key to obtain a second plaintext, and then judging the second plaintext Whether the plaintext matches the default plaintext, wherein the plaintext further includes the second plaintext. The anti-theft method according to claim 9, further comprising: when the first plaintext matches the default plaintext, when the identification information matches the default verification data, and when the second plaintext matches the default plaintext , start the motor through the controller.

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