Working method of keyless entry system

Abstract

The invention discloses a working method of a keyless entry system, which comprises the following steps that: carrying equipment sends out an unlocking signal which comprises at least a matching section and a verification section, the matching section is fixed information and is used for matching with a vehicle, and the information is changed along with each emission and is used for unlocking the vehicle; the unlocking device receives the unlocking signal, verifies the matching section and the verification section respectively, and stores the verification section as a reference section after verification succeeds; when the carrying equipment sends out an unlocking signal every time, the verification section changes according to a first rule; the unlocking device compares the verification section of the received unlocking signal with the reference section, and if the comparison result accords with a first rule, verification succeeds; the unlocking signal is transmitted in a binary mode, and the first rule is binary value change. According to the method, the structure of the matching section and the verification section is adopted, and safe and reliable unlocking operation is achieved through comparison of the verification section and the reference section and application of the first rule.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and particularly to a working method of a keyless entry system. Background Art

[0002] Keyless Entry is a modern vehicle or building access system that allows users to enter and start a vehicle or enter a building without using a traditional physical key.

[0003] In the prior art, although the keyless entry system adopts advanced encryption technology, it still faces security risks. For example, when using solutions such as Radio Frequency Identification (RFID) and Near Field Communication (NFC), the electrical signals can be copied, resulting in security risks. Summary of the Invention

[0004] The present invention provides a working method of a keyless entry system, which has high security and overcomes the risk of being easily copied.

[0005] In the working method of the keyless entry system, a carrying device emits an unlocking signal, and the unlocking signal includes at least a matching segment and a verification segment. The matching segment is fixed information for matching with the vehicle, and the information of the verification segment changes with each emission for unlocking the vehicle; the unlocking device receives the unlocking signal, verifies the matching segment and the verification segment respectively, and after successful verification, saves the verification segment as a reference segment; when the carrying device emits an unlocking signal each time, the verification segment changes according to a first rule; the unlocking device compares the verification segment of the received unlocking signal with the reference segment, and if the comparison result conforms to the first rule, the verification is successful; the unlocking signal is transmitted in binary, and the first rule is the change of binary values.

[0006] Preferably, the first rule is provided by the unlocking device; after successful verification, the unlocking device sends an adjustment signal to the carrying device, and the adjustment signal includes the first rule.

[0007] Preferably, the verification segment is a value compiled in binary, and the first rule is that the value increases; the unlocking device compares the received verification segment with the reference segment, and if the verification segment is greater than the reference segment, the verification is successful.

[0008] Preferably, the unlocking device receives the unlocking signal, verifies the matching segment and the verification segment respectively, and after successful verification, transforms the verification segment according to the first rule and uses it as the reference segment; the unlocking device compares the verification segment of the received unlocking signal with the reference segment, and if the comparison result is consistent, the verification is successful.

[0009] Preferably, after verifying the unlocking signal generated by the carrying device, the unlocking device sends a confirmation signal to the vehicle control unit to perform an unlocking operation.

[0010] Preferably, after the carrying device sends an unlocking signal, the verification segment sent this time is changed at least once according to the first rule and then stored as a backup verification segment.

[0011] The working method of this keyless entry system adopts the structure of a matching segment and a verification segment. Through the comparison with the reference segment and the application of the first rule, a safe and reliable unlocking operation is achieved. The system also includes some additional features, such as adjustment signals, backup verification segments, etc., which improve the flexibility and robustness of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a flowchart of an embodiment of the working method of the keyless entry system.

[0013] Figure 2 It is a flowchart of another embodiment of the working method of the keyless entry system. EMBODIMENTS

[0014] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described by referring to the drawings below are exemplary and are only used to explain the present invention, and cannot be construed as a limitation of the present invention.

[0015] A keyless entry system is a modern entry system, which generally refers to the ability to enter and start a vehicle or building without using a traditional physical key. Although it is called "keyless", it actually still involves some electronic devices and technologies, rather than completely without any form of "key".

[0016] A keyless entry system usually uses electronic devices (such as smart cards, key fobs, mobile phones, etc.) to carry authentication information and completes the unlocking or starting operation by communicating with the electronic system of the vehicle or building. The working methods of such a system may include remote wireless communication, radio frequency identification, Bluetooth technology, etc., depending on the specific implementation.

[0017] Although users do not need a physical key, they still need to carry the corresponding electronic devices, and these devices contain information for identity authentication. Therefore, although keyless entry simplifies the user's operation process, it is not completely without elements related to the "key".

[0018] For the sake of convenience of understanding, taking a car as an example, the corresponding electronic device that needs to be carried is called "carrying device 1", and correspondingly on the vehicle, the one that can match the carrying device 1 is called "unlocking device 2".

[0019] For traditional keyless entry, that is, the carrying device 1 sends an unlocking signal 11, and the unlocking device 2 receives and unlocks the vehicle. SeeFigure 1 and Figure 2 In the present invention, compared with the traditional solution, when the portable device 1 emits an unlocking signal 11, it at least includes two parts - a matching segment and a verification segment. The matching segment is fixed information used to match with the vehicle, and the information in the verification segment changes with each emission and is used to unlock the vehicle.

[0020] The matching segment can be understood as verifying whether the portable device 1 matches the unlocking device 2, avoiding a situation where one portable device 1 communicates with multiple unlocking devices 2, which may pose a security risk. This is similar to a traditional key where one key corresponds to one lock. Here, the matching segment is used to verify whether the portable device 1 corresponds to the unlocking device 2.

[0021] The verification segment is for further ensuring security. Since electromagnetic signals can be obtained and replicated, the fixed information in the matching segment is easily replicated. The verification segment changes according to a first rule each time the unlocking signal 11 is emitted, thus avoiding the risk of being replicated.

[0022] Since there is a verification segment that changes according to the first rule in the unlocking signal 11, when the unlocking device 2 receives the unlocking signal 11, it verifies the matching segment and the verification segment respectively. After successful verification, it saves the verification segment as a reference segment. Next time when verifying, the unlocking device 2 compares the verification segment of the received unlocking signal 11 with the reference segment. If the comparison result conforms to the first rule, the verification is successful. The unlocking signal 11 is transmitted in binary, and the first rule is the change of binary values.

[0023] If it is the first unlocking, there may be a situation where there is no reference segment. Generally, it is defaulted that the first unlocking is successful before the device is sold. After the product is launched and used, there will be no problem.

[0024] For easy understanding, we assume that the matching segment is "AA"; the verification segment is "123", and the first rule is that the value of the verification segment increases by 1 each time. At this time, the reference segment of the unlocking device 2 is "122".

[0025] Now the portable device 1 emits an unlocking signal 11, which includes "AA123". The unlocking device 2 receives "AA123". The matching segment "AA" is successful. The verification segment "123" is 1 greater than the reference segment "122", conforming to the first rule. Therefore, the verification is successful. At the same time, "123" is stored as the new reference segment.

[0026] In one embodiment, the first rule can be an increase in value. Therefore, as long as the verification segment is greater than the reference segment, the verification can be successful. Of course, in actual applications, to avoid the first rule being recognized and imitated, generally the first rule is more complex. Moreover, the first rule itself can also have a variation rule. For example, the difference each time it changes forms an arithmetic sequence.

[0027] In some preferred embodiments, the first rule is provided by the unlocking device 2. After the unlocking device 2 successfully verifies, it sends an adjustment signal 21 to the carrying device 1, and the adjustment signal 21 includes the first rule. In this way, every time the verification is successful, the unlocking device 2 will send the new first rule to the carrying device 1, thus avoiding the possibility of the first rule being copied.

[0028] Of course, the storage of the reference segment can also change actively. For example, after successfully verifying with "AA123", instead of storing "123" as the reference segment, "123" is changed to "124" according to the first rule, and then "124" is stored as the new reference segment. Next time when verifying, it is only necessary to directly verify whether the new verification segment is consistent with the reference segment.

[0029] After the unlocking device 2 verifies the unlocking signal 11 generated by the carrying device 1, it sends a confirmation signal to the vehicle control unit to perform the unlocking operation. After the carrying device 1 sends the unlocking signal 11, the verification segment sent this time is changed at least once according to the first rule and then stored as the backup verification segment.

[0030] For example, after the carrying device 1 sends "AA123", it generates "AA124" according to the first rule and stores it as the backup verification segment. In this way, even if the carrying device 1 needs to replace the battery, the content to be sent next time can be saved.

[0031] The working method of this keyless entry system adopts the structure of the matching segment and the verification segment, and realizes a safe and reliable unlocking operation through the comparison of the verification and the reference segment, as well as the application of the first rule.

[0032] The dual verification of the matching segment and the verification segment increases the security of the system. The purpose of introducing the matching segment is to prevent a carrying device 1 from communicating with multiple unlocking devices 2, thereby preventing potential security hazards. The static nature of the matching segment ensures that each carrying device 1 can only communicate with a specific unlocking device 2.

[0033] For the verification segment, it changes according to the first rule every time it is transmitted. The system effectively avoids the risk of the electromagnetic signal being copied. The dynamic nature of the verification segment increases the randomness of the system, making it more difficult for attackers to imitate or copy, and enhancing the security of the system.

[0034] After the unlocking device 2 successfully verifies, it stores the received verification segment as the reference segment, and this reference segment is not static. By changing the reference segment, such as adjusting it according to the first rule, the system increases its resistance to attacks. Such a design increases the difficulty for attackers to crack the reference segment and improves the security of the system.

[0035] To further enhance the security of the system, the specific implementation of the first rule can be more complex. For example, different variation rules can be adopted, such as the difference value during each change being an ever-changing sequence, or generating a new first rule according to a certain algorithm. Such complication can effectively reduce the probability of attackers' guessing and imitation.

[0036] In some embodiments, the unlocking device 2 provides the first rule and sends an adjustment signal to the carrying device 1 after successful verification. This way of dynamically updating the first rule increases the real-time performance of the system, while reducing the chance for attackers to analyze and guess the first rule, thereby further enhancing the security of the system.

[0037] The unlocking device 2 adopts an adaptive method during verification, that is, it conducts verification according to the first rule. This enables the system to adapt to different usage environments and scenarios, improving the flexibility and applicability of the system.

[0038] The above has detailed the structure, features, and function effects of the present invention based on the illustrated embodiments. The above are only the preferred embodiments of the present invention, but the present invention is not limited to the scope defined by the drawings. Any changes made in accordance with the concept of the present invention, or modified into equivalent embodiments with equivalent changes, should still be within the protection scope of the present invention as long as they do not exceed the spirit covered by the description and the drawings.

Claims

1. A method for operating a keyless entry system, characterized in that, The portable device (1) emits an unlocking signal (11), and the unlocking signal (11) includes at least a matching segment and a verification segment. The matching segment is fixed information for matching with the vehicle, and the information of the verification segment changes with each emission for unlocking the vehicle; The unlocking device (2) receives the unlocking signal (11), verifies the matching segment and the verification segment respectively, and after successful verification, saves the verification segment as a reference segment; Each time the portable device (1) emits an unlocking signal (11), the verification segment changes according to a first rule; The unlocking device (2) compares the verification segment of the received unlocking signal (11) with the reference segment. If the comparison result conforms to the first rule, the verification is successful; The unlocking signal (11) is transmitted in binary mode, and the first rule is the change of binary values.

2. The method for operating a keyless entry system according to claim 1, characterized in that, The first rule is provided by the unlocking device (2); After the unlocking device (2) verifies successfully, it sends an adjustment signal (21) to the portable device (1), and the adjustment signal (21) includes the first rule.

3. The method for operating a keyless entry system according to claim 1, characterized in that, The verification segment is a value compiled in binary mode, and the first rule is that the value increases; The unlocking device (2) compares the received verification segment with the reference segment. If the verification segment is greater than the reference segment, the verification is successful.

4. The method for operating a keyless entry system according to claim 2, characterized in that, The unlocking device (2) receives the unlocking signal (11), verifies the matching segment and the verification segment respectively, and after successful verification, transforms the verification segment according to the first rule and uses it as the reference segment; The unlocking device (2) compares the verification segment of the received unlocking signal (11) with the reference segment. If the comparison result is consistent, the verification is successful.

5. The method for operating a keyless entry system according to any one of claims 1-4, After the unlocking device (2) verifies the unlocking signal (11) generated by the carrying device (1), it sends a confirmation signal to the vehicle control unit to perform an unlocking operation.

6. The method for operating a keyless entry system according to any one of claims 1-4, After the carrying device (1) sends the unlocking signal (11), it changes the verification segment sent this time at least once according to the first rule and then stores it as a standby verification segment.

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