Anti-tracking camouflage method, system and terminal for intelligent circulation box

Abstract

The invention relates to an anti-tracking camouflage method, system and terminal of an intelligent circulation box, and belongs to the technical field of intelligent circulation boxes, the anti-tracking camouflage method comprises the following steps: using a commercial cryptographic algorithm SM4 to generate a dynamic secret key K, and setting the validity period of the dynamic secret key K; splitting the dynamic key K into n segments according to the bandwidth limitation of the Beidou message, wherein the length of each segment is not greater than 40 bytes; a set protocol header is embedded in each segment of the secret key, a Wi-Fi beacon frame or a Bluetooth broadcast packet is mixed, and a Beidou message is generated and sent; acquiring the actual period of validity of the dynamic key K in real time; judging whether the actual period of validity is greater than a set period of validity; and if yes, sending a key failure erasing instruction. The intelligent circulation box has the advantages that the secret key is effectively prevented from being tracked and cracked, and the safety and reliability of the intelligent circulation box are improved.

Description

Technical Field

[0001] This application relates to the technical field of intelligent transfer boxes, and in particular, to an anti-tracking camouflage method, system and terminal for intelligent transfer boxes. Background Art

[0002] In related technologies, for the transmission method of confidential documents, usually the documents to be transmitted (such as letters) are put into a sealed letter bag, and basic transmission information such as the sender and recipient, information sensitivity level, transmission time limit, letter number, etc. are marked on the envelope, and then sealed with a sealing strip. However, this packaging method has obvious deficiencies: using a paper envelope for packaging, the security and confidentiality are poor, and the ability to resist external attacks and damage is weak; the security of the transmission process largely depends on the confidentiality awareness and self-awareness of the transmission personnel. Once there is human negligence, it is easy to cause information leakage accidents.

[0003] In order to make up for the defects of the sealed document packaging form and effectively improve the security protection level of the documents, intelligent transfer boxes are currently used for document transportation. The intelligent transfer box is a portable device that relies on a management platform and is encrypted (using commercial cryptography technology) and controlled in the cloud. Although the intelligent transfer box uses an encryption method, most of the encryption methods are static keys. Therefore, it is very easy to face the risks of being tracked and remotely cracked during transportation. Summary of the Invention

[0004] In order to effectively prevent the key from being tracked and cracked and improve the security and reliability of the intelligent transfer box, this application provides an anti-tracking camouflage method, system and terminal for the intelligent transfer box.

[0005] In the first aspect, this application provides an anti-tracking camouflage method, system and terminal for an intelligent transfer box, and adopts the following technical solutions: An anti-tracking camouflage method for an intelligent transfer box, comprising: Using the commercial cryptographic algorithm SM4 to generate a dynamic key K, and setting the validity period of the dynamic key K; the dynamic key , is a UTC timestamp, is the unique identifier of the intelligent transfer box, is a 16-bit random number; Splitting the dynamic key K into n segments according to the bandwidth limit of the Beidou message, and the length of each segment is not greater than 40 bytes; Embedding a set protocol header in each segment of the key, mixing it into a Wi-Fi beacon frame or a Bluetooth broadcast packet, and generating a Beidou message for sending; Obtaining the actual validity period of the dynamic key K in real time; Judging whether the actual validity period is greater than the set validity period; If so, send a key invalidation and erasure instruction.

[0006] By adopting the above technical solution, the commercial cryptography algorithm SM4 is used to generate a dynamic key K. The SM4 algorithm itself has high security and anti-attack capabilities. The use of the dynamic key avoids the risk that the static key is easily cracked. Even if an attacker obtains the key at a certain moment, since the key will change dynamically, the key obtained after cracking will become invalid after the validity period, greatly improving the security of the information transmission of the transfer box. The dynamic key K is split into n segments and embedded in the protocol header for encapsulation, so that the key exists in a fragmented form during the transmission process. This method increases the difficulty for the attacker to obtain the complete and valid key, because they need to obtain all segments simultaneously and identify the correct protocol header to restore the complete key, effectively preventing the key from being intercepted and cracked as a whole. The actual validity period of the dynamic key K is obtained in real time and compared with the set validity period. When the actual validity period is greater than the set validity period, a key invalidation and erasure instruction is sent, ensuring the timeliness of the key, clearing the expired key in time, and further improving the security and reliability of the intelligent transfer box.

[0007] Optionally, the steps before sending the Beidou message include: After integrating into the Beidou message, obtain the environmental noise power; Input the environmental noise power into the constructed frequency band selection formula to obtain the carrier frequency of the Beidou message; The frequency band selection formula is , is the carrier frequency, is the base frequency, is the 20MHz channel spacing, is the environmental noise power, is the -85dBm noise threshold.

[0008] By adopting the above technical solution, by obtaining the environmental noise power and dynamically selecting the carrier frequency of the Beidou message according to this power, the key information can be better hidden in the environmental noise, reducing the probability of being monitored and tracked. At the same time, different carrier frequencies can adapt to different environments, enhancing the anti-interference ability of the key transmission and ensuring the reliable transmission of the key in a complex electromagnetic environment.

[0009] Optionally, the anti-tracking and camouflage method further includes: When transporting the intelligent transfer box, detect the characteristic frequencies of the surrounding devices; Determine the device type according to the characteristic frequencies; When the characteristic frequencies corresponding to the device type reach the interference condition, emit a composite wave for interference; The interference condition is: the characteristic frequency , where M is the total number of device types, is the set of characteristic frequency bands of the c-th type of device, is the signal power spectral density, is the environmental noise floor, is the signal-to-noise ratio threshold related to the device type.

[0010] By adopting the above technical solution, for some devices that may steal information during transportation, by interfering with their characteristic frequencies, the signal characteristics obtained by the tracking device can be destroyed, making it difficult for the tracker to accurately judge the position and transportation status of the intelligent transfer box, and preventing the communication information between the transfer box and the outside from being intercepted or tampered with.

[0011] Optionally, the composite wave , is the interference amplitude of each physical field, is the total radiation power limit, is the bandwidth of each interference signal; is the carrier center frequency, , is the frequency jitter amount, is the change value of the environmental noise power; is the phase modulation function, is the frequency modulation slope; is the convolution modulation operator, n represents the index number of the pulse, is the ideal pulse with unit amplitude, is the pulse repetition interval.

[0012] Optionally, the anti-tracking camouflage method further includes: Obtain the real coordinates of the real position of the intelligent transfer box; Generate multiple virtual trajectories according to the real coordinates; Calculate the path confusion value of each virtual trajectory; Select the virtual trajectory with the smallest path confusion value as the optimal confusion trajectory; Obtain the dynamic transmission time interval, and the dynamic transmission time interval , is the average number of Beidou messages transmitted per unit time, is the base value of Beidou message transmission per unit time, ; Send the optimal confusion trajectory according to the dynamic transmission time interval.

[0013] By adopting the above technical solution, by obtaining the real coordinates of the real position of the intelligent transfer box and generating multiple virtual trajectories, the sight of trackers can be greatly confused. Screening out the optimal confusion trajectory and sending it further strengthens the protection of the real position of the transfer box. The optimal confusion trajectory can simulate the characteristics of the real trajectory to the greatest extent, making the tracker think that this is the real trajectory, so as to divert the attention from the real position of the transfer box, providing a strong guarantee for the safe transportation of the transfer box. Sending the optimal confusion trajectory according to the dynamic transmission time interval brings greater interference to the tracking work of the tracker. The dynamic time interval makes it difficult for the tracker to predict the sending time of the trajectory information and unable to establish a stable tracking model.

[0014] Optionally, the step of generating multiple virtual trajectories according to the real coordinates includes: Retrieve the perturbation radius; Generate the first virtual coordinate according to the real coordinate and the perturbation radius; Taking the first virtual coordinate as the base point, generate multiple second virtual coordinates according to the set offset radius; Generate corresponding virtual trajectories according to the first virtual coordinate and multiple second virtual coordinates; The first virtual coordinate , where M is the real coordinate, R is the perturbation radius, N is the perturbation order, represents the random direction angle of the k-th order perturbation component.

[0015] By adopting the above technical solution, determining the perturbation radius can introduce a certain range of changes on the basis of the real coordinate, so as to generate different virtual coordinates, and then obtain diversified virtual trajectories, thereby increasing the difficulty of tracking.

[0016] Optionally, the anti-tracking camouflage method further includes: Before generating the first virtual coordinate, obtain the current power of the composite wave interference; Judge whether the current power is less than the set power threshold; If not, adjust the perturbation radius according to the current power; The perturbation radius , where SPL is the composite wave interference power.

[0017] By adopting the above technical solution, by obtaining the current power of the composite wave interference and comparing it with the set power threshold, the system can dynamically adjust the perturbation radius according to the actual interference situation. When the power of the composite wave interference is high, it means that the external interference is strong, and the tracker may be more likely to break through the interference to obtain target information. At this time, adjusting the perturbation radius according to the current power can expand the interference range, enhance the interference effect, more effectively cover up the position of the real target, and thus improve the success rate of anti-tracking.

[0018] In a second aspect, the present application provides an anti-tracking camouflage system for an intelligent transfer box, adopting the following technical solution: An anti-tracking camouflage system for an intelligent transfer box, comprising: A key generation module, which generates a dynamic key K using the commercial cryptographic algorithm SM4 and sets the validity period of the dynamic key K; the dynamic key , is a UTC timestamp, is the unique identifier of the intelligent transfer box, is a 16-bit random number; A key processing and sending module, which is used to split the dynamic key K into n segments according to the bandwidth limit of the Beidou message, and the length of each segment is not more than 40 bytes; and embed a set protocol header in each segment of the key, mix it into the Wi-Fi beacon frame or the Bluetooth broadcast packet, and generate a Beidou message for sending; A duration acquisition module, which is used to acquire the actual validity period of the dynamic key K in real time; A judgment module, which is used to judge whether the actual validity period is greater than the set validity period; An instruction sending module, which is used to send a key invalidation and erasure instruction.

[0019] In a third aspect, the present application provides a terminal, adopting the following technical solution: A terminal, comprising: A memory, which stores an anti-tracking camouflage program for an intelligent transfer box; A processor, which is used to execute the program stored on the memory to implement the steps of the above anti-tracking camouflage method for an intelligent transfer box.

[0020] In summary, the present application has at least the following beneficial effects: Generate a dynamic key K using the commercial cryptographic algorithm SM4. The SM4 algorithm itself has high security and anti-attack capabilities. The use of dynamic keys avoids the risk of static keys being easily cracked. Even if an attacker obtains the key at a certain moment, since the key will change dynamically, the key obtained after cracking will become invalid after the expiration date, greatly improving the security of the information transmission of the transfer box. Split the dynamic key K into n segments and embed them in the protocol header for encapsulation, so that the key exists in a fragmented form during the transmission process. This method increases the difficulty for attackers to obtain the complete and valid key, because they need to obtain all segments simultaneously and identify the correct protocol header to restore the complete key, effectively preventing the key from being intercepted and cracked as a whole. Obtain the actual expiration date of the dynamic key K in real time and compare it with the set expiration date. When the actual expiration date is greater than the set expiration date, send a key invalidation and erasure instruction to ensure the timeliness of the key, clear the expired key in a timely manner, and further improve the security and reliability of the intelligent transfer box. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the first flowchart of the method embodiment of the present application; Figure 2 is the second flowchart of the method embodiment of the present application; Figure 3 is the third flowchart of the method embodiment of the present application; Figure 4 is the fourth flowchart of the method embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will combine the accompanying Figure 1 - accompanying Figure 4 , and clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] The first embodiment of the present application discloses an anti-tracking and camouflage method for an intelligent transfer box. Referring to Figure 1 , as an implementation of the anti-tracking and camouflage method, the anti-tracking and camouflage method may include S110-S160: S110, generate a dynamic key K using the commercial cryptographic algorithm SM4 and set the expiration date of the dynamic key K; S120, split the dynamic key K into n segments according to the bandwidth limit of the Beidou message, and the length of each segment is not greater than 40 bytes; S130. Embed the set protocol header into each segment of the secret key, mix it into the Wi-Fi beacon frame or Bluetooth broadcast packet, and integrate it into the Beidou message for transmission; S140. Obtain the actual validity period of the dynamic key K in real time; S150. Determine whether the actual validity period is greater than the set validity period; S160. If so, send a secret key invalidation and erasure instruction.

[0024] Specifically, the dynamic key , is the UTC timestamp, is the unique identifier of the intelligent transfer box, is a 16-bit random number.

[0025] The current UTC timestamp can be obtained by using the time function provided by the system. For example, the time acquisition function built into the server system can be used. Assign a unique identifier to each intelligent transfer box. The identifier can be a number, a letter, or a combination of them, and can be assigned during the production or initialization of the intelligent transfer box and recorded in the system database. Generate a 16-bit random number using a random number generator. A secure random number generation algorithm can be adopted, such as the random number generation function provided by the operating system, to ensure randomness and security. Concatenate the obtained UTC timestamp, the unique identifier of the intelligent transfer box, and the 16-bit random number in a certain order. For example, they can be concatenated in the order of "UTC timestamp - unique identifier of the intelligent transfer box - 16-bit random number" to form a string to be encrypted. Convert the concatenated string into a byte array suitable for processing by the SM4 algorithm. For example, UTF-8 encoding can be used for conversion to ensure data consistency and compatibility. Then select a fixed SM4 secret key, and the secret key length can be 128 bits (16 bytes). Use the selected SM4 secret key to encrypt the preprocessed byte array. During the encryption process, the byte array is grouped into groups of 16 bytes, and each group of data is encrypted. After the encryption is completed, the obtained encryption result is the dynamic key K.

[0026] The validity period of the dynamic key K , where D is the transportation mileage. For S120, the splitting method can be: Split the dynamic key K into n segments according to the bandwidth limit , where i is the segmentation sequence number, L is the maximum length of a single segment, and L is not greater than 40 bytes. Embed the set protocol header for each segment (such as the header identifier "33" + CRC16 checksum), and then mix it into the Wi-Fi beacon frame or Bluetooth broadcast packet, so as to integrate it into the Beidou message and send it to the intelligent transfer box control platform. Start timing at the moment when the Beidou message is sent. When the total timing duration (actual validity period) is greater than the set validity period, send a key invalidation and erasure instruction to the control platform to erase the dynamic key K. If the intelligent transfer box is still in transit and has not reached the handover location at this time, generate a new dynamic key K and execute S110 - S130 again.

[0027] Further, before sending the Beidou message, the environmental noise power can be obtained through a radio frequency receiving device, and then the environmental noise power is input into a pre-constructed frequency band selection formula to obtain the carrier frequency of the Beidou message. The frequency band selection formula is: , is the carrier frequency, is the base frequency, is the 20MHz channel interval, is the environmental noise power, is the -85dBm noise threshold.

[0028] In addition, when splitting the dynamic key K, the maximum length L of a single segment can be updated according to the environmental noise power, .

[0029] When the intelligent transfer box is in transit, the anti-tracking camouflage method may further include the following steps: Detect the characteristic frequencies of surrounding devices, and determine the device types according to the characteristic frequencies. When the characteristic frequencies corresponding to the device types reach the interference conditions, transmit a composite wave for interference.

[0030] The interference conditions are: the characteristic frequency , M is the total number of device types, is the set of characteristic frequency bands of the c-th type of device, is the signal power spectral density, is the environmental noise floor, is the signal-to-noise ratio threshold related to the device type. For example, for a recording device is 18KHz - 22KHz, for a radio frequency device is 2.4GHz - 5.8GHz, for an infrared device is 30KHz - 50KHz; for a recording device is 3dB, for a radio frequency device is 6dB, for an infrared device is 10dB.

[0031] The composite wave , is the interference amplitude of each physical field, is the total radiation power limit, is the bandwidth of each interference signal; is the carrier center frequency, , is the frequency jitter amount, is the change value of environmental noise power; is the phase modulation function, is the frequency modulation slope; is the convolution modulation operator, n represents the index number of the pulse, is the ideal pulse with unit amplitude, is the pulse repetition interval. , is the protection range of the civil frequency band.

[0032] Refer to Figure 2 , during the transportation of the intelligent transfer box, the anti-tracking camouflage method may further include S210 - S260: S210, obtain the real coordinates of the real position of the intelligent transfer box; S220, generate multiple virtual trajectories according to the real coordinates; S230, calculate the path confusion value of each virtual trajectory; S240, select the virtual trajectory with the smallest path confusion value as the optimal confusion trajectory; S250, obtain the dynamic transmission time interval; S260, send the optimal confusion trajectory according to the dynamic transmission time interval.

[0033] Specifically, the global positioning system (GPS) or the Beidou satellite module can be used to obtain the real coordinates of the intelligent transfer box.

[0034] Refer to Figure 3 , the steps of generating multiple virtual trajectories according to the real coordinates may include S310 - S340: S310, retrieve the perturbation radius; S320, generate the first virtual coordinate according to the real coordinates and the perturbation radius; S330, taking the first virtual coordinate as the base point, generate multiple second virtual coordinates according to the set offset radius; S340, generate the corresponding virtual trajectories according to the first virtual coordinate and the multiple second virtual coordinates.

[0035] Specifically, the first virtual coordinate , M is the real coordinate, R is the perturbation radius, N is the perturbation order, represents the random direction angle of the k-th order perturbation component.

[0036] Reference Figure 4 , further, before generating the first virtual coordinate, the anti-tracking camouflage method may further include S410-S440: S410, obtaining the current power of the composite wave interference; S420, determining whether the current power is less than a set power threshold; S430, if so, keeping the original disturbance radius unchanged; S440, if not, adjusting the disturbance radius according to the current power.

[0037] Specifically, a power meter can be used to measure the current power of the composite wave interference, and then compare the current power with the set power threshold to determine whether the current power is less than the set power threshold. If not, the disturbance radius can be adjusted. The disturbance radius , where SPL is the composite wave interference power.

[0038] After generating the first virtual coordinate according to the real coordinate and the disturbance radius, a polar coordinate conversion method is adopted. With the first virtual coordinate as the center, multiple points are randomly generated within the set offset radius as the second virtual coordinates; then the first virtual coordinate and the multiple second virtual coordinates are connected in a certain order to form a virtual trajectory. Of course, in other embodiments, virtual path planning can also be performed through algorithms.

[0039] After generating multiple virtual paths, calculate the path confusion value of each virtual trajectory. The path confusion value can be defined as the similarity between the virtual trajectory and the real trajectory. The lower the similarity, the higher the confusion value.

[0040] The calculation method of the path confusion value is: ; where is the economic cost item, is the transportation economic cost of virtual trajectory e, including: Fuel cost: is the trajectory length, is the fuel consumption coefficient, is the oil price.

[0041] Labor cost: , is the estimated travel time, is the hourly wage.

[0042] Extract the trajectory length and estimated travel time of each virtual trajectory from the road network topology data, and then calculate the basic cost according to the real-time oil price and the agreed labor rate (hourly wage) in the contract to obtain the economic cost item of each virtual trajectory.

[0043] Economic cost weight It can be dynamically adjusted, and the adjustment rule is , is the initial value, is the actual transportation cost, is the technical cost.

[0044] is the risk cost item, is the risk factor weight, is the quantification value of the i-th type of risk of the virtual trajectory k, including: Tracking exposure risk: is the risk sensitivity coefficient, is the length of the unobstructed section in the trajectory.

[0045] Environmental threat risk: is the number of real-time threat detections of the trajectory e, is the threat detection times threshold.

[0046] Signal interference risk: is the average signal-to-noise ratio of the trajectory, is the signal-to-noise ratio threshold of the trajectory.

[0047] The length of the unobstructed section, the number of real-time threat detections, and the average signal-to-noise ratio of each trajectory are collected in real time through the GIS system and sensors; then, normalization processing is performed according to the cost function, and is determined according to the weight distribution method .

[0048] Economic cost weight It can be dynamically adjusted, and the adjustment rule is , is the initial value, is the threat level. The greater the values of the tracking exposure risk, environmental threat risk, and signal interference risk, the greater the threat level, and a value of the threat level corresponds to a value range.

[0049] is the trajectory deviation penalty term, is the similarity penalty coefficient; is the virtual path and the real path Euclidean distance deviation.

[0050] In addition, when the perturbation radius remains unchanged, the virtual trajectory is regenerated every 200 meters; if the perturbation radius changes, the distance for regenerating the virtual trajectory is shortened, for example, shortened to 150 meters.

[0051] Dynamic transmission time interval , is the average number of Beidou message transmissions per unit time, is the base value of Beidou message transmission per unit time, , a corresponds to one U.

[0052] In addition, the relevant threshold values and base values in this application are all empirical values and are determined according to historical relevant data.

[0053] The implementation principle of this embodiment is as follows: Use the commercial cryptographic algorithm SM4 to generate a dynamic key K, set the validity period of the dynamic key K, then split the dynamic key K into n segments according to the bandwidth limit of the Beidou message, and embed the set protocol header in each segment of the key, mix it into the Wi-Fi beacon frame or Bluetooth broadcast packet, and integrate it into the Beidou message; then obtain the environmental noise power, input the environmental noise power into the frequency band selection formula to obtain the carrier frequency of the Beidou message, and then send it; When the intelligent transfer box is in transportation, detect the characteristic frequencies of surrounding devices, and determine the set type according to the characteristic frequencies. When the characteristic frequencies corresponding to the device type reach the interference condition, transmit a composite wave for interference.

[0054] Obtain the real coordinates of the real position of the intelligent transfer box, then retrieve the perturbation radius, generate the first virtual coordinate according to the real coordinates and the perturbation radius, generate multiple second virtual coordinates based on the first virtual coordinate according to the set offset radius, then generate the corresponding virtual trajectory according to the first virtual coordinate and the multiple second virtual coordinates, calculate the path confusion value of each virtual trajectory, and select the virtual trajectory with the smallest path confusion value as the optimal confusion trajectory; then send the optimal confusion trajectory according to the obtained dynamic transmission time interval.

[0055] When the intelligent transfer box is in transportation, obtain the actual validity period of the dynamic key K in real time, and judge whether the actual validity period is greater than the set validity period. If so, send a key invalidation erasure instruction.

[0056] Based on the above method embodiment, the second embodiment of this application discloses an anti-tracking camouflage system for an intelligent transfer box. The anti-tracking camouflage system for the intelligent transfer box in the embodiment of this application can implement any one of the above anti-tracking camouflage methods for the intelligent transfer box, and the specific working processes of each module in the anti-tracking camouflage system for the intelligent transfer box can refer to the corresponding processes in the above method embodiment.

[0057] For the sake of easy understanding, the following is an example: An anti-tracking camouflage system for an intelligent transfer box includes: A key generation module that uses the commercial cryptographic algorithm SM4 to generate a dynamic key K and sets the validity period of the dynamic key K; the dynamic key , is the UTC timestamp, is the unique identifier of the intelligent transfer box, which is a 16-bit random number; The key processing and sending module is used to split the dynamic key K into n segments according to the bandwidth limit of the Beidou message, and the length of each segment is not more than 40 bytes; and embed the set protocol header in each segment of the key, mix it into the Wi-Fi beacon frame or Bluetooth broadcast packet, and generate a Beidou message for sending; The duration acquisition module is used to obtain the actual validity period of the dynamic key K in real time; The judgment module is used to judge whether the actual validity period is greater than the set validity period; The instruction sending module is used to send a key invalidation and erasure instruction.

[0058] The third embodiment of the present application provides a terminal. As an implementation manner of the terminal, the terminal may include: a memory and a processor; wherein, The memory is used to store the anti-tracking camouflage program of the intelligent transfer box; The processor is used to execute the program stored on the memory to implement the steps of the anti-tracking camouflage method of the intelligent transfer box described above.

[0059] Wherein, the memory can be communicatively connected to the processor through a communication bus, and the communication bus can be an address bus, a data bus, a control bus, etc.

[0060] In addition, the memory may include a random access memory (RAM), and may also include a non-volatile memory (NVM), such as at least one disk memory.

[0061] And the processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0062] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application in sequence. Any feature disclosed in this specification (including the abstract and drawings), unless specifically stated, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically stated, each feature is only an example in a series of equivalent or similar features.

Claims

1. An anti-tracking camouflage method for an intelligent transfer box, characterized in that, Including: Generate a dynamic key K using the commercial cryptographic algorithm SM4 and set the validity period of the dynamic key K; The dynamic key , is the UTC timestamp, is the unique identifier of the intelligent transfer box, is a 16-bit random number; Split the dynamic key K into n segments according to the bandwidth limit of the Beidou message, and the length of each segment is no more than 40 bytes; Embed the set protocol header in each segment of the key, mix it into the Wi-Fi beacon frame or Bluetooth broadcast packet, and generate and send a Beidou message; Obtain the actual validity period of the dynamic key K in real time; Judge whether the actual validity period is greater than the set validity period; If so, send a key invalidation and erasure instruction.

2. The anti-tracking camouflage method of an intelligent transfer box according to claim 1, wherein The steps before sending the Beidou message include: After integrating into the Beidou message, obtain the ambient noise power; Input the ambient noise power into the constructed frequency band selection formula to obtain the carrier frequency of the Beidou message; The frequency band selection formula is , is the carrier frequency, is the fundamental frequency, is the 20 MHz channel spacing, is the ambient noise power, is the -85 dBm noise threshold.

3. The anti-tracking camouflage method of an intelligent transfer box according to claim 1, wherein, The anti-tracking and camouflage method further includes: When transporting the intelligent transfer box, detect the characteristic frequencies of surrounding devices; Determine the device type according to the characteristic frequencies; When the characteristic frequencies corresponding to the device type reach the interference condition, transmit a composite wave for interference; The interference condition is: the characteristic frequency , where M is the total number of device types, is the set of characteristic frequency bands of the c-th type of device, is the signal power spectral density, is the environmental noise floor, is the signal-to-noise ratio threshold related to the device type.

4. A method for anti-tracking camouflage of an intelligent transfer box according to claim 3, characterized in that, The composite wave , is the interference amplitude of each physical field, is the total radiation power limit, is the bandwidth of each interference signal; is the carrier center frequency, , is the frequency jitter amount, is the change value of the environmental noise power; is the phase modulation function, is the frequency modulation slope; is the convolution modulation operator, n represents the index number of the pulse, is the ideal pulse with unit amplitude, is the pulse repetition interval.

5. A method for anti-tracking camouflage of an intelligent transfer box according to claim 2, characterized in that, The anti-tracking and camouflage method further includes: Obtain the real coordinates of the real position of the intelligent transfer box; Generate multiple virtual trajectories according to the real coordinates; Calculate the path confusion value of each virtual trajectory; Select the virtual trajectory with the smallest path confusion value as the optimal confusion trajectory; Obtain a dynamic transmission time interval, where the dynamic transmission time interval , is the average number of Beidou message transmissions per unit time, is the base value of Beidou message transmissions per unit time, ; Send the optimal confusion trajectory according to the dynamic transmission time interval.

6. The anti-tracking camouflage method of an intelligent transfer box according to claim 5, characterized in that, The step of generating multiple virtual trajectories according to the real coordinates includes: Retrieve the perturbation radius; Generate the first virtual coordinates according to the real coordinates and the perturbation radius; Taking the first virtual coordinates as the base point, generate multiple second virtual coordinates according to the set offset radius; Generate corresponding virtual trajectories according to the first virtual coordinates and multiple second virtual coordinates; The first virtual coordinate is the real coordinate, R is the perturbation radius, N is the perturbation order, and represents the random direction angle of the k-th order perturbation component.

7. The anti-tracking camouflage method of an intelligent transfer box according to claim 6, characterized in that, The anti-tracking and camouflage method further includes: Before generating the first virtual coordinates, obtain the current power of the composite wave interference; Judge whether the current power is less than the set power threshold; If not, adjust the perturbation radius according to the current power; The disturbance radius , where SPL is the interference power of the composite wave.

8. An anti-tracking camouflage system for an intelligent transfer box, characterized in that, Execute the anti-tracking and camouflage method of the intelligent transfer box as described in any one of claims 1-7, including: The key generation module uses the commercial cryptographic algorithm SM4 to generate a dynamic key K and sets the validity period of the dynamic key K; the dynamic key , is a UTC timestamp, is the unique identifier of the intelligent transfer box, is a 16-bit random number; A key processing and sending module, configured to split the dynamic key K into n segments according to the bandwidth limit of the Beidou message, with the length of each segment not exceeding 40 bytes; and embed the set protocol header in each segment of the key, mix it into the Wi-Fi beacon frame or Bluetooth broadcast packet, and generate and send a Beidou message; A duration acquisition module, configured to obtain the actual validity period of the dynamic key K in real time; A judgment module, configured to judge whether the actual validity period is greater than the set validity period; An instruction sending module, configured to send a key invalidation and erasure instruction.

9. A terminal, characterized in that, Including: A memory storing the anti-tracking and camouflage program of the intelligent transfer box; A processor, configured to execute the program stored on the memory to implement the steps of the anti-tracking and camouflage method of the intelligent transfer box as described in any one of claims 1-7.

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