CN111907473B - Wireless signal source identification method and system and vehicle-mounted keyless authentication method and system - Google Patents
Wireless signal source identification method and system and vehicle-mounted keyless authentication method and system Download PDFInfo
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- CN111907473B CN111907473B CN201910386146.7A CN201910386146A CN111907473B CN 111907473 B CN111907473 B CN 111907473B CN 201910386146 A CN201910386146 A CN 201910386146A CN 111907473 B CN111907473 B CN 111907473B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
Abstract
The invention provides a method and a system for identifying a wireless signal source and a method and a system for vehicle-mounted keyless authentication, wherein the extracted signal characteristics of a wireless signal are compared with all signal characteristics prestored in a characteristic library, and if the signal characteristics of the wireless signal are matched with any one of the signal characteristics in the characteristic library, the wireless signal is determined to be transmitted by a legal transmitting terminal; and if the signal characteristics of the wireless signals are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals are transmitted by an illegal transmitting terminal. Therefore, the wireless signals transmitted by the legal transmitting terminal and the relay station are screened. Therefore, the problem that the existing keyless authentication system is easily attacked by a relay station to cause low safety can be solved through the identification method of the wireless signal source provided by the invention.
Description
Technical Field
The invention relates to the technical field of automobile control, in particular to a method and a system for identifying a wireless signal source and a method and a system for vehicle-mounted keyless authentication.
Background
An existing intelligent Key system PEPS (Passive Entry & Passive Start), also called a keyless system and a Passive keyless Entry starting system, mainly comprises a vehicle-mounted communication and control system and a user-carried intelligent Key RFID (Radio Frequency Identification) for legal identity Identification, also called Radio Frequency Identification, smart Key or Fob. When a user carries the intelligent key to enter the detection range of the vehicle, the user only needs to directly pull the external opening handle on the vehicle door or press the unlocking button on the door handle, the vehicle actively identifies and authenticates the legality of the intelligent key, and if the intelligent key passes the authentication, the vehicle releases the anti-theft function and unlocks the vehicle door; when a user enters the vehicle, the vehicle actively identifies and authenticates the intelligent key in the vehicle only by pressing the start button, if the authentication is passed, the vehicle releases the anti-theft of the engine and other anti-theft devices such as an electronic steering shaft lock, and the user can directly start or power on the vehicle. The vehicle is equipped with intelligent key system's benefit has removed the loaded down with trivial details operation of looking for the key, operating the key when the user uses the vehicle from, improves the convenience that the vehicle used. At present, an intelligent key system becomes the standard configuration of middle-high grade cars, and has a tendency of popularizing middle-low grade cars. The smart key system has been developed for 10 years, and the technology has matured and been widely used. The smart key has been in diversified forms as an RFID device of the smart key system, such as a card-type smart key, a pendant smart key, a watch smart key, a remote smart key, and a bluetooth-based mobile phone car key.
The conventional keyless starting system mainly uses wireless signal interaction between a smart key and an automobile to control the automobile, wherein the wireless signal interaction includes, for example, an LF-RF (low frequency-radio frequency) signal, a BLE (bluetooth) signal, or a Zigbee (Zigbee) signal. However, such wireless communication signals are vulnerable to the relay station, which results in a problem of low security.
Disclosure of Invention
The invention aims to provide a method and a system for identifying a wireless signal source and a vehicle-mounted keyless authentication method and system, which aim to solve the problem that the existing keyless authentication system is easy to be attacked by a relay station to cause low security.
In order to solve the above technical problem, the present invention provides a method for identifying a wireless signal source, which is used for a keyless authentication system, and comprises:
receiving a wireless signal;
extracting signal features of the wireless signal; and
comparing the signal characteristics of the wireless signal with all signal characteristics prestored in a characteristic library, and if the signal characteristics of the wireless signal are matched with any signal characteristic in the characteristic library, determining that the wireless signal is transmitted by a legal transmitting terminal; and if the signal characteristics of the wireless signals are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals are transmitted by an illegal transmitting terminal.
Optionally, in the method for identifying a wireless signal source, the method for extracting the signal feature of the wireless signal includes: and extracting a key data area of the wireless signal, and preprocessing data in the key data area.
Optionally, in the method for identifying a wireless signal source, after preprocessing the data in the key data area, the method for extracting the signal feature of the wireless signal further includes: and extracting the signal characteristics of the wireless signal by using a tolerance matching algorithm.
Optionally, in the method for identifying a wireless signal source, the signal characteristics of the wireless signal include: a combination of one or more of time domain features, frequency domain features, statistical features, and mathematical features.
In order to solve the above technical problem, the present invention further provides a vehicle-mounted keyless authentication method, which includes:
transmitting a wireless signal by using a transmitting terminal;
receiving a wireless signal by a receiving end;
extracting the signal characteristics of the wireless signals received by the receiving end; and
comparing the signal characteristics of the wireless signals received by the receiving terminal with all signal characteristics prestored in a characteristic library, and if the signal characteristics of the wireless signals received by the receiving terminal are matched with any signal characteristics in the characteristic library, determining that the wireless signals received by the receiving terminal are transmitted by the transmitting terminal; and if the signal characteristics of the wireless signals received by the receiving end are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals received by the receiving end are not transmitted by the transmitting end.
In order to solve the above technical problem, the present invention further provides an identification system for a wireless signal source, which is used for a keyless authentication system, and comprises:
a receiving end for receiving a wireless signal;
the characteristic library is prestored with a plurality of signal characteristics; and
the signal processing module is used for extracting the signal characteristics of the wireless signal received by the receiving end, comparing the signal characteristics of the wireless signal with all the signal characteristics prestored in the characteristic library, and if the signal characteristics of the wireless signal are matched with any one of the signal characteristics in the characteristic library, determining that the wireless signal is transmitted by a legal transmitting end; and if the signal characteristics of the wireless signals are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals are transmitted by an illegal transmitting terminal.
In order to solve the above technical problem, the present invention further provides a vehicle-mounted keyless authentication system, including:
a transmitting end for transmitting a wireless signal;
a receiving end for receiving a wireless signal;
the characteristic library is in communication connection with the receiving end, and a plurality of signal characteristics are prestored in the characteristic library; and
the signal processing module is respectively in communication connection with the receiving end and the feature library; the signal processing module is used for extracting the signal characteristics of the wireless signals received by the receiving terminal, comparing the signal characteristics of the wireless signals received by the receiving terminal with all the signal characteristics prestored in the characteristic library, and if the signal characteristics of the wireless signals received by the receiving terminal are matched with any one of the signal characteristics in the characteristic library, determining that the wireless signals received by the receiving terminal are transmitted by the transmitting terminal; and if the signal characteristics of the wireless signals received by the receiving end are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals received by the receiving end are not transmitted by the transmitting end.
Optionally, in the vehicle-mounted keyless authentication system, when the transmitting end is bound to the receiving end, a plurality of signal features matched with the transmitting end are pre-stored in the feature library.
Optionally, in the vehicle-mounted keyless authentication system, when the signal processing module determines that the wireless signal received by the receiving end is transmitted by the transmitting end, the vehicle-mounted keyless authentication system passes authentication of the transmitting end; when the signal processing module determines that the wireless signal received by the receiving end is not transmitted by the transmitting end, the vehicle-mounted keyless authentication system fails to authenticate the transmitting end.
Optionally, in the vehicle-mounted keyless authentication system, the transmitting end includes: a smart phone, a wearable device, a car key, a radio frequency card or a car end controller; when the transmitting end is a smart phone, wearable equipment, a car key or a radio frequency card, the receiving end comprises a car end controller; when the transmitting end is a vehicle end controller, the receiving end comprises a smart phone, wearable equipment, a vehicle key or a radio frequency card.
In summary, in the method and system for identifying a wireless signal source and the vehicle-mounted keyless authentication method and system provided by the present invention, the extracted signal characteristics of the wireless signal are compared with all signal characteristics pre-stored in a characteristic library, and if the signal characteristics of the wireless signal are matched with any one of the signal characteristics in the characteristic library, it is determined that the wireless signal is transmitted by a legal transmitting terminal; and if the signal characteristics of the wireless signals are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals are transmitted by an illegal transmitting terminal. With such a configuration, if the wireless signal is transmitted through the relay station, the relay station may change some attributes of the wireless signal transmitted by the legitimate transmitting terminal, so that the signal characteristics of the received wireless signal cannot be matched with any signal characteristics in the characteristic library, and the wireless signal is determined to be transmitted by the illegitimate transmitting terminal, so that the wireless signals transmitted by the legitimate transmitting terminal and the relay station are discriminated. Therefore, the method for identifying the wireless signal source provided by the invention can solve the problem that the existing keyless authentication system is easy to be attacked by the relay station to cause low security.
Drawings
It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation to the scope of the invention. Wherein:
FIG. 1 is a schematic view of a keyless system according to an embodiment of the present invention in a normal condition;
fig. 2 is a schematic diagram of a keyless system under a relay station attack according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for identifying a wireless signal source according to an embodiment of the present invention.
In the drawings:
01-a key; 02-vehicle; 03. 04-Relay station.
Detailed Description
To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are intended to be part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
The following description refers to the accompanying drawings.
Referring to fig. 1 to fig. 3, in which fig. 1 is a schematic view of a keyless system according to an embodiment of the present invention under a normal condition, fig. 2 is a schematic view of a keyless system according to an embodiment of the present invention under a relay station attack, and fig. 3 is a flowchart of a method for identifying a wireless signal source according to an embodiment of the present invention.
As shown in fig. 1, under normal conditions, the key 01 can interact with the vehicle 02 through wireless control signals to realize vehicle control functions. Generally, the communication distance in this case is usually within 10m, depending on the definition of the application scenario and the limitations of the signal transmission power of the key 01 and the receiving power of the vehicle 02.
The inventors found that the wireless signal interaction between the key 01 and the vehicle 02 is vulnerable to the attack of the relay station, resulting in a problem of low security. As shown in fig. 2, an attacker implements a remote attack by erecting a relay 03 and a relay 04. Specifically, the wireless control signal of the key 01 may be transmitted to the vehicle 02 after passing through the routes of the relay 03 and the relay 04, thereby realizing a control function for the vehicle 02. The communication distance in this case can usually reach hundreds of meters or even longer. Due to the characteristic of the keyless authentication system, the key 01 continuously transmits a wireless signal to the outside, so that an attacker can realize the control of the vehicle 02 under the condition that a driver is completely unaware of the attack through the relay station, and the system has huge threat and low safety.
To this end, an embodiment of the present invention provides a method for identifying a wireless signal source, which is used in a keyless authentication system, and referring to fig. 3, the method for identifying a wireless signal source provided in this embodiment mainly includes the following steps:
step 901: receiving a wireless signal, it should be understood that the wireless signal may be a frame, two frames, or multiple frames, where a frame of the wireless signal refers to a wireless signal containing a piece of information.
Step 902: extracting signal features of the wireless signal; if two or more frames of wireless signals are received in step 901, the signal characteristics of all frames of wireless signals are extracted.
Step 903: judging whether the signal characteristics of the wireless signals are matched with the signal characteristics in the characteristic library or not; if yes, go to step 904; if not, go to step 905; specifically, the signal characteristics of the wireless signal are compared with all signal characteristics pre-stored in a characteristic library, and if the signal characteristics of the wireless signal are matched with any one of the signal characteristics in the characteristic library, it can be considered that the signal characteristics of the wireless signal are matched with the signal characteristics in the characteristic library, and step 904 is executed; if the signal characteristics of the wireless signal are not matched with all the signal characteristics in the characteristic library, the signal characteristics of the wireless signal can be considered to be not matched with the signal characteristics in the characteristic library, and step 905 is executed; similarly, in this step, if two or more frames of wireless signals are received in step 901, the signal characteristics of all the frames of wireless signals are compared.
Step 904: determining that the wireless signal is transmitted by a legitimate transmitting end; here, the legal transmitting end refers to the transmitting end which is matched and authenticated.
Step 905: determining that the wireless signal is transmitted by an illegal transmitting end.
The embodiment of the invention also provides an identification system of a wireless signal source, which is used for a keyless authentication system and comprises the following components: the device comprises a receiving end, a feature library and a signal processing module. The receiving end is used for receiving a wireless signal; the feature library is prestored with a plurality of signal features; the signal processing module is used for extracting the signal characteristics of the wireless signal received by the receiving terminal, comparing the signal characteristics of the wireless signal with all the signal characteristics prestored in the characteristic library, and if the signal characteristics of the wireless signal are matched with any one of the signal characteristics in the characteristic library, determining that the wireless signal is transmitted by a legal transmitting terminal; and if the signal characteristics of the wireless signals are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals are transmitted by an illegal transmitting terminal.
The inventor finds that, during the relay process of the wireless signal, the relay 03 and the relay 04 perform operations such as signal modulation/demodulation and amplification, and the characteristics of the relay may change some properties of the wireless signal sent by the key 02 (i.e. the legitimate transmitting end), for example, signal noise may be increased, signal amplitude of a certain frequency band may be changed, or some spurious signals may be added. I.e. the wireless signal emitted by the relay station 04 and the wireless signal emitted by the key 02 differ in some signal characteristics. Based on the above findings, in the method and system for identifying a wireless signal source provided in this embodiment, if a wireless signal is transmitted through a relay station, since the relay station may change some attributes of the wireless signal transmitted by a legal transmitting end, the signal characteristics of the received wireless signal cannot be matched with any signal characteristics in the characteristic library, and the wireless signal is determined to be transmitted by an illegal transmitting end, so that the wireless signals transmitted by the legal transmitting end and the relay station are discriminated. Therefore, the method for identifying the wireless signal source provided by the invention can solve the problem that the existing keyless authentication system is easy to be attacked by the relay station to cause low security.
Further, the method of extracting the signal feature of the wireless signal includes: and extracting a key data area of the wireless signal, and preprocessing data in the key data area. The receiving end can be provided with a sampling circuit for collecting the wireless signals and storing the wireless signals in a data buffer area so as to carry out subsequent processing. Furthermore, a key data area (Region of Interest) of the wireless signal received by the receiving end is extracted, and the data in the key data area is preprocessed, for example, data standardization or mathematical transformation is performed, so that the data is convenient for subsequent utilization and operation.
Preferably, the signal characteristics of the wireless signal include: a combination of one or more of time domain features, frequency domain features, statistical features, and mathematical features. Time domain features such as signal rise time, signal peak or signal fall time, frequency domain features such as frequency distribution of the signal, statistical features such as signal variance, signal skewness or signal kurtosis, mathematical features such as signal moment, signal entropy or signal envelope features, etc. After being relayed by the relay station, the signal characteristics of the wireless signal may change. It should be noted that the above-mentioned signal characteristics are merely exemplary, the signal characteristics of the wireless signal are not limited to include the above-mentioned characteristics, and those skilled in the art can use other similar characteristics to discriminate the wireless signal, and the invention is not limited to this.
Further, after preprocessing the data in the key data area, the method for comparing the signal characteristics of the wireless signal with all the signal characteristics pre-stored in a characteristic library further comprises: and (5) comparing by using a tolerance matching algorithm. For example, the tolerance matching algorithm may set a threshold range of a certain signal feature in the feature library (it should be understood that the certain signal feature is the same as and comparable to the signal feature of the extracted wireless signal), and if the signal feature of the extracted wireless signal is within the threshold range, it may be determined that the signal feature of the wireless signal matches the certain signal feature in the feature library. Otherwise, the signal characteristic of the wireless signal is judged not to be matched with the signal characteristic in the characteristic library.
It should be noted that the identification method and the identification system for the wireless signal source provided in this embodiment can be applied to various keyless authentication systems, such as a vehicle-mounted keyless authentication system, an entrance guard keyless authentication system, and the like.
The embodiment of the invention also provides a vehicle-mounted keyless authentication method, which comprises the following steps: transmitting a wireless signal by using a transmitting terminal; receiving a wireless signal by a receiving end; extracting the signal characteristics of the wireless signals received by the receiving end; comparing the signal characteristics of the wireless signals received by the receiving terminal with all signal characteristics prestored in a characteristic library, and if the signal characteristics of the wireless signals received by the receiving terminal are matched with any signal characteristics in the characteristic library, determining that the wireless signals received by the receiving terminal are transmitted by the transmitting terminal; and if the signal characteristics of the wireless signals received by the receiving end are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals received by the receiving end are not transmitted by the transmitting end.
The embodiment of the invention also provides a vehicle-mounted keyless authentication system, which comprises: the transmitting terminal is used for transmitting a wireless signal; a receiving end for receiving a wireless signal; the characteristic library is in communication connection with the receiving end, and a plurality of signal characteristics are prestored in the characteristic library; the signal processing module is respectively in communication connection with the receiving end and the feature library; the signal processing module is used for extracting the signal characteristics of the wireless signals received by the receiving terminal, comparing the signal characteristics of the wireless signals received by the receiving terminal with all signal characteristics prestored in the characteristic library, and if the signal characteristics of the wireless signals received by the receiving terminal are matched with any one of the signal characteristics in the characteristic library, determining that the wireless signals received by the receiving terminal are transmitted by the transmitting terminal; and if the signal characteristics of the wireless signals received by the receiving end are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals received by the receiving end are not transmitted by the transmitting end.
In the vehicle-mounted keyless authentication method and system provided by this embodiment, the transmitting end continuously transmits a wireless signal to the outside, and the wireless signal received by the receiving end may or may not be transmitted by the legitimate transmitting end (e.g., transmitted by the relay station), and if the signal characteristic of the wireless signal received by the receiving end can be matched with any signal characteristic in the characteristic library, it is determined that the wireless signal received by the receiving end is transmitted by the transmitting end (i.e., the legitimate transmitting end). On the contrary, if the signal characteristics of the wireless signal received by the receiving end cannot be matched with all the signal characteristics in the characteristic library, it is determined that the wireless signal received by the receiving end is not transmitted by the transmitting end, but is transmitted by an illegal transmitting end (such as a relay station) so as to discriminate the wireless signal transmitted by the legal transmitting end from the wireless signal transmitted by the relay station.
Preferably, when the transmitting end is bound with the receiving end, a plurality of signal characteristics matched with the transmitting end are pre-stored in the characteristic library. Generally, in a vehicle-mounted keyless authentication system, a transmitting end and a receiving end need to be initially bound, and when the transmitting end and the receiving end are initially bound, a transmitting end is close to the receiving end (within 10m, for example) in a safe environment (in an environment where interference sources such as a relay station do not exist, which is determined by a certain measure), and a wireless signal which can be received by the receiving end can be considered to be from the transmitting end uniquely, so that signal characteristics of a plurality of frames of wireless signals received by the receiving end are extracted and stored in the characteristic library. The signal features in the feature library thus obtained can be considered to be matched with the transmitting terminal.
Preferably, when the signal processing module determines that the wireless signal received by the receiving end is transmitted by the transmitting end, the vehicle-mounted keyless authentication system passes the authentication of the transmitting end, and further allows the vehicle to start; when the signal processing module determines that the wireless signal received by the receiving end is not transmitted by the transmitting end, the vehicle-mounted keyless authentication system fails to authenticate the transmitting end, and further prohibits the vehicle from starting. The vehicle-mounted keyless authentication system discriminates the source of the received wireless signal, and if the wireless signal is determined to be from a legal transmitting terminal, the authentication of the transmitting terminal is passed; on the contrary, if the wireless signal is determined to be from an illegal transmitting terminal (such as a relay station), the authentication of the transmitting terminal cannot be passed, and the security of the keyless authentication system is greatly improved.
Optionally, the transmitting end includes but is not limited to: smart phones, wearable devices, car keys, radio frequency cards, or car-end controllers. In practice, when the transmitting end is a smart phone, a wearable device, a car key or a radio frequency card, the receiving end can be a car end controller; if the transmitting end is a vehicle end controller, the receiving end can be a smart phone, wearable equipment, a vehicle key or a radio frequency card, and the wireless signal source can be identified. Therefore, the transmitting end and the receiving end can be selected and configured according to the requirement, the transmitting end and the receiving end can transmit Bluetooth or other wireless signals, and the invention does not limit the selection of the transmitting end and the receiving end.
The above description is only for the purpose of describing the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are intended to fall within the scope of the appended claims.
Claims (9)
1. A method for identifying a wireless signal source, which is used for a keyless authentication system, is characterized by comprising the following steps:
receiving a wireless signal;
extracting signal features of the wireless signal; and
comparing the signal characteristics of the wireless signal with all signal characteristics prestored in a characteristic library, and if the signal characteristics of the wireless signal are matched with any signal characteristic in the characteristic library, determining that the wireless signal is transmitted by a legal transmitting terminal; if the signal characteristics of the wireless signals are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals are transmitted by an illegal transmitting terminal;
wherein the signal characteristics of the wireless signal comprise: a combination of one or more of time domain features, frequency domain features, statistical features, and mathematical features.
2. The method for identifying a wireless signal source according to claim 1, wherein the method for extracting the signal feature of the wireless signal comprises: and extracting a key data area of the wireless signal, and preprocessing data in the key data area.
3. The method according to claim 2, wherein the method for comparing the signal characteristics of the wireless signal with all signal characteristics pre-stored in a characteristic library further comprises: and (5) comparing by using a tolerance matching algorithm.
4. An on-vehicle keyless authentication method, characterized by comprising:
transmitting a wireless signal by using a transmitting terminal;
receiving a wireless signal by a receiving end;
extracting the signal characteristics of the wireless signals received by the receiving end; and
comparing the signal characteristics of the wireless signals received by the receiving terminal with all signal characteristics prestored in a characteristic library, and if the signal characteristics of the wireless signals received by the receiving terminal are matched with any signal characteristics in the characteristic library, determining that the wireless signals received by the receiving terminal are transmitted by the transmitting terminal; if the signal characteristics of the wireless signals received by the receiving end are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals received by the receiving end are not transmitted by the transmitting end;
wherein the signal characteristics of the wireless signal comprise: a combination of one or more of time domain features, frequency domain features, statistical features, and mathematical features.
5. An identification system of a wireless signal source for a keyless authentication system, comprising:
a receiving end for receiving a wireless signal;
the characteristic library is prestored with a plurality of signal characteristics; and
the signal processing module is used for extracting the signal characteristics of the wireless signals received by the receiving end, comparing the signal characteristics of the wireless signals with all the signal characteristics prestored in the characteristic library, and determining that the wireless signals are transmitted by a legal transmitting end if the signal characteristics of the wireless signals are matched with any one of the signal characteristics in the characteristic library; if the signal characteristics of the wireless signal are not matched with all the signal characteristics in the characteristic library, determining that the wireless signal is transmitted by an illegal transmitting terminal;
wherein the signal characteristics of the wireless signal comprise: a combination of one or more of time domain features, frequency domain features, statistical features, and mathematical features.
6. An on-vehicle keyless authentication system, characterized by comprising:
the transmitting terminal is used for transmitting a wireless signal;
a receiving end for receiving a wireless signal;
the characteristic library is in communication connection with the receiving end, and a plurality of signal characteristics are prestored in the characteristic library; and
the signal processing module is respectively in communication connection with the receiving end and the feature library; the signal processing module is used for extracting the signal characteristics of the wireless signals received by the receiving terminal, comparing the signal characteristics of the wireless signals received by the receiving terminal with all the signal characteristics prestored in the characteristic library, and if the signal characteristics of the wireless signals received by the receiving terminal are matched with any one of the signal characteristics in the characteristic library, determining that the wireless signals received by the receiving terminal are transmitted by the transmitting terminal; if the signal characteristics of the wireless signals received by the receiving end are not matched with all the signal characteristics in the characteristic library, determining that the wireless signals received by the receiving end are not transmitted by the transmitting end;
wherein the signal characteristics of the wireless signal comprise: a combination of one or more of time domain features, frequency domain features, statistical features, and mathematical features.
7. The vehicle-mounted keyless authentication system according to claim 6, wherein when the transmitting terminal is bound to the receiving terminal, a plurality of signal characteristics matched with the transmitting terminal are pre-stored in the characteristic library.
8. The vehicle-mounted keyless authentication system according to claim 6, wherein when the signal processing module determines that the wireless signal received by the receiving terminal is transmitted by the transmitting terminal, the vehicle-mounted keyless authentication system authenticates the transmitting terminal; when the signal processing module determines that the wireless signal received by the receiving end is not transmitted by the transmitting end, the vehicle-mounted keyless authentication system fails to authenticate the transmitting end.
9. The vehicle-mounted keyless authentication system according to claim 6, wherein the transmitting end comprises: a smart phone, a wearable device, a car key, a radio frequency card or a car end controller; when the transmitting end is a smart phone, wearable equipment, a car key or a radio frequency card, the receiving end comprises a car end controller; when the transmitting end is a vehicle end controller, the receiving end comprises a smart phone, wearable equipment, a vehicle key or a radio frequency card.
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| KR101783151B1 (en) * | 2016-11-04 | 2017-09-28 | 현대오토에버 주식회사 | Method and apparatus for controlling remote vehicle entry based on movement |
| CN108202695A (en) * | 2016-12-16 | 2018-06-26 | 比亚迪股份有限公司 | Anti-stealing method for vehicles, device and vehicle |
| CN108632745A (en) * | 2017-03-15 | 2018-10-09 | 恩智浦有限公司 | Safety equipment |
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