A high-security multi-hop power transmission network based on WAPI technology

Abstract

The present application discloses a high-security multi-hop power transmission network based on WAPI technology, which relates to the field of multi-level data encrypted transmission. It includes a secret key generation module, a data acquisition module, a multi-level transmission node analysis module, and a multi-level encrypted transmission module. The present invention effectively analyzes the encrypted data received by the power control center in the previous data transmission period, intelligently analyzes and selects each level of power transmission nodes, enhances the randomness of the selection of power transmission nodes, indirectly increases the difficulty of intrusion and locking of power transmission nodes, creates continuous secret keys by using a secret key generator, and obtains highly random secret keys through random matching and data processing, indirectly reducing the probability of secret key leakage, effectively improving the security and reliability of encrypted transmission of power transmission data, and being conducive to ensuring the development and construction of the power system.

Description

Technical Field

[0001] This application relates to the field of multi-level data encryption transmission, and particularly to a high-security multi-hop power transmission network based on WAPI technology. Background Art

[0002] As a key component of the power system, the reliability and stability of power transmission lines are crucial. With the advancement of the construction of smart grids, the monitoring requirements for power transmission lines are getting higher and higher, including system availability, stability, security, robustness, and autonomy and controllability. Therefore, researching communication technologies and solutions suitable for power transmission line information transmission has important strategic significance and practical value. However, the existing technologies still have the following deficiencies:

[0003] When the existing technologies perform encrypted transmission of power transmission data, they usually use fixed data transmission paths and fixed encryption modes, indirectly increasing the probability of data being intercepted and cracked, reducing the security and reliability of encrypted data transmission, and being unfavorable for the development and construction of the power system. Summary of the Invention

[0004] The purpose of the present invention is to provide a wireless communication method using a control channel between wireless communication devices to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A high-security multi-hop power transmission network based on WAPI technology, including:

[0006] A secret key generation module: used to create a set of secret keys for each power transmission device;

[0007] A data acquisition module: used to acquire the data to be transmitted of each power transmission device to obtain a set of data to be encrypted for each power transmission device;

[0008] A multi-level transmission node analysis module: used to analyze the encrypted data received by the power control center to obtain the transmission node information corresponding to each power transmission device;

[0009] A multi-level encryption transmission module; used to analyze and control according to the transmission node information corresponding to each power transmission device to realize encrypted transmission of the set of data to be encrypted for each power transmission device, and obtain the multi-level encryption transmission results of each power transmission device.

[0010] In a preferred embodiment of this solution, the specific implementation method of the secret key generation module is as follows:

[0011] By using a secret key generator at the WAPI terminal of each power transmission device to create continuous secret keys, a set of secret keys corresponding to each power transmission device is obtained, where the set of secret keys includes each secret key corresponding to each power transmission device and the time point corresponding to each secret key.

[0012] In a preferred embodiment of this solution, the specific implementation method of the data acquisition module is as follows:

[0013] Obtain the monitoring data of each type of monitoring device in each transmission device corresponding to each time point and the data volume of the monitoring data at each time point;

[0014] Obtain the number of control instructions of each transmission device corresponding to each time point and the data volume of the control instructions at each time point;

[0015] Obtain the communication data of each transmission device corresponding to each time point and the data volume of the communication data at each time point;

[0016] Obtain the preset standard data transmission time interval of the power control center, and statistically calculate the total amount of monitoring data, the total amount of control instructions, and the total amount of communication data within the standard data transmission time period;

[0017] Based on the monitoring data, the total amount of monitoring data, the number of control instructions, the total amount of control instructions, the communication data, and the total amount of communication data of each transmission device corresponding to each time point within the standard data transmission time period, establish the encrypted data set to be encrypted for each transmission device.

[0018] In a preferred embodiment of this solution, the specific implementation method of the multi-level transmission node analysis module is as follows:

[0019] Receive the encrypted data and device numbers transmitted by each highest-level transmission node through the encrypted data receiving port of the power control center, and receive the key information of each transmission device through the corresponding key receiving port of the power control center;

[0020] Wherein the key information includes the numbers and keys of each transmission device;

[0021] Parse the encrypted data and device numbers transmitted by each highest-level transmission node through the numbers and keys of each transmission device received by the power control center to obtain the encrypted data set to be encrypted corresponding to each transmission device;

[0022] Extract information from the encrypted data set to be encrypted corresponding to each transmission device to obtain the monitoring data, the total amount of monitoring data, the number of control instructions, the total amount of control instructions, the communication data, and the total amount of communication data corresponding to each transmission device. The detection data includes the operating state parameters and network quality parameters of the transmission device. Among them, the network quality parameters include the network signal strength change curve and data transmission rate change curve within the standard data transmission time period, and the operating state parameters include the current change curve, voltage change curve, and power change curve within the standard data transmission time period. The communication data refers to the data interaction frequency;

[0023] Establish a data extraction relationship between the multi-level transmission node analysis module and the database, and extract the standard network quality parameters and standard operating status parameters corresponding to each power transmission device stored in the database;

[0024] Compare the operating status parameters and network quality parameters of each power transmission device with the standard network quality parameters and standard operating status parameters corresponding to each power transmission device to obtain the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate, and data transmission rate compliance rate corresponding to each power transmission device;

[0025] Through the calculation formula , calculate the first node selection coefficient corresponding to each power transmission device ;

[0026] Through the calculation formula:

[0027] , calculate and obtain the comprehensive power transmission node selection coefficient corresponding to each power transmission device , where represents the number corresponding to each power transmission device, , , , , respectively represent the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate, and data transmission rate compliance rate corresponding to each power transmission device, represents the total amount of monitoring data corresponding to each power transmission device, , respectively represent the number of control instructions and the total amount of data of control instructions corresponding to each power transmission device, , respectively represent the data interaction frequency and the total amount of communication data corresponding to each power transmission device, , respectively represent the preset influence weights of operating status parameters and network quality parameters, , represent the preset influence weights of control instructions and communication data.

[0028] Extract the intervals of the comprehensive power transmission node selection coefficients corresponding to each level of transmission nodes stored in the database, and screen the comprehensive power transmission node selection coefficients corresponding to each power transmission device according to the intervals of the comprehensive power transmission node selection coefficients corresponding to each level of transmission nodes to obtain the power transmission devices corresponding to each level of transmission nodes;

[0029] Extract the geographical location information corresponding to each power transmission device stored in the database, where the geographical location information includes the straight-line distances between each power transmission device and each adjacent power transmission device, and obtain the straight-line distances between each upper-level power transmission node and each lower-level power transmission node according to the power transmission devices corresponding to each level of transmission nodes;

[0030] Conduct a preliminary division according to a preset distance interval to obtain the lower-level power transmission nodes corresponding to each upper-level power transmission node. If there is a lower-level power transmission node corresponding to multiple upper-level power transmission nodes, then assign this power transmission node to the upper-level power transmission node with the largest comprehensive power transmission node selection coefficient. If there are lower-level power transmission nodes that have not been divided, then assign these lower-level power transmission nodes to the upper-level power transmission node with the closest distance. Record the transmission node levels corresponding to each power transmission device, the upper-level power transmission nodes corresponding to each power transmission device, and the lower-level power transmission nodes as the transmission node information corresponding to each power transmission device.

[0031] In a preferred solution of this scheme, the specific execution method of the multi-level encryption transmission module is as follows:

[0032] Transmit the transmission node information corresponding to each power transmission device through the data transmission port of the power control center;

[0033] Each power transmission device receives the transmission node information corresponding to each power transmission device through the data receiving port;

[0034] Generate a set of random numbers through a strong random number generator, match the time points corresponding to each secret key with any random number in the set of random numbers, and record the random number corresponding to the time point corresponding to each secret key as the number corresponding to the time point of each secret key, and screen to obtain the numbers corresponding to each secret key;

[0035] Generate a series of random numbers through a strong random number generator, calculate the mean value corresponding to the series of random numbers, and record the random number with the smallest difference from the mean value corresponding to the series of random numbers as the target random number;

[0036] Match the target random number with the numbers corresponding to each secret key, calculate the difference between the target random number and the numbers corresponding to each secret key, and screen the secret key corresponding to the number with the smallest difference, which is recorded as the secret key corresponding to the power transmission device;

[0037] Encrypt the data set to be encrypted corresponding to the power transmission device through the secret key corresponding to the power transmission device to obtain the encrypted data corresponding to the power transmission device. Transmit the secret key to the power control center through the secret key transmission port of the power transmission device, and transmit the encrypted data corresponding to the power transmission device and the device number to the upper-level power transmission node corresponding to the power transmission device through the encrypted data transmission port of the power transmission device;

[0038] The upper-level power transmission node receives the encrypted data and data numbers of each corresponding lower-level power transmission node through the encrypted data receiving port, encrypts its own set of data to be encrypted, the received encrypted data and data numbers of each lower-level power transmission node using the secret key corresponding to the upper-level power transmission node, and transmits the encrypted data and device numbers corresponding to the upper-level power transmission node to the upper-level power transmission node corresponding to the upper-level power transmission node through the encrypted data transmission port corresponding to the upper-level power transmission node, until the encrypted data receiving port of the power control center receives the encrypted data and device numbers transmitted by each top-level transmission node. The encrypted data and device numbers received by the encrypted data receiving port of the power control center from each top-level transmission node are recorded as the multi-level encrypted transmission results of each power transmission device.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] By effectively analyzing the encrypted data received by the power control center in the previous data transmission period, the present invention intelligently analyzes and selects power transmission nodes at all levels, enhancing the randomness of power transmission node selection, indirectly increasing the difficulty of intrusion and locking of power transmission nodes, and improving the effectiveness and reliability of encrypted transmission of power transmission data.

[0041] By using a secret key generator to create continuous secret keys and through random matching and data processing, the present invention obtains secret keys with high randomness, indirectly reducing the probability of secret key leakage, effectively improving the security and reliability of encrypted transmission of power transmission data, and being beneficial to ensuring the development and construction of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on the following drawings without creative efforts.

[0043] Figure 1 It is a schematic diagram of module connection of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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.

[0045] Please refer to Figure 1 , the present invention provides a highly secure multi-hop network for power transmission based on WAPI technology, including a secret key generation module, a data acquisition module, a multi-level transmission node analysis module, and a multi-level encrypted transmission module;

[0046] The key generation module is connected to the multi-level encryption transmission module, the data acquisition module is connected to the multi-level transmission node analysis module, and the multi-level transmission node analysis module is connected to the multi-level encryption transmission module.

[0047] The key generation module is used to create a set of keys for each power transmission device;

[0048] Furthermore, the specific execution method of the key generation module is as follows:

[0049] By using a key generator at the WAPI terminal of each power transmission device to create continuous keys, a set of keys corresponding to each power transmission device is obtained, where the set of keys includes each key corresponding to each power transmission device and the time point corresponding to each key.

[0050] The data acquisition module is used to acquire the data to be transmitted of each power transmission device, and obtain a set of data to be encrypted for each power transmission device;

[0051] Furthermore, the specific execution method of the data acquisition module is as follows:

[0052] Acquire the monitoring data corresponding to each type of monitoring device in each power transmission device at each time point and the data volume of the monitoring data at each time point;

[0053] Acquire the number of control instructions corresponding to each power transmission device at each time point and the data volume of the control instructions at each time point;

[0054] Acquire the communication data corresponding to each power transmission device at each time point and the data volume of the communication data at each time point;

[0055] Acquire the preset standard data transmission time interval of the power control center, and statistically calculate the total data volume of the monitoring data, the total data volume of the control instructions, and the total data volume of the communication data within the standard data transmission time period;

[0056] Establish a set of data to be encrypted for each power transmission device according to the monitoring data, the total data volume of the monitoring data, the number of control instructions, the total data volume of the control instructions, the communication data, and the total data volume of the communication data corresponding to the power transmission device at each time point within the standard data transmission time period.

[0057] The multi-level transmission node analysis module is used to analyze the encrypted data received by the power control center to obtain the transmission node information corresponding to each power transmission device;

[0058] Furthermore, the specific execution method of the multi-level transmission node analysis module is as follows:

[0059] Receive the encrypted data and device numbers transmitted by each top-level transmission node through the encrypted data receiving port of the power control center, and receive the key information of each power transmission device through the corresponding key receiving port of the power control center;

[0060] Among them, the key information includes the numbers and keys of each power transmission device;

[0061] Analyze the encrypted data and device numbers transmitted by each top-level transmission node with the numbers and keys of each power transmission device received through the power control center to obtain the encrypted data sets corresponding to each power transmission device;

[0062] Extract information from the encrypted data sets corresponding to each power transmission device to obtain the monitoring data, total amount of monitoring data, number of control instructions, total amount of control instruction data, communication data, and total amount of communication data corresponding to each power transmission device. The detection data includes the operating state parameters and network quality parameters of the power transmission device. Among them, the network quality parameters include the network signal strength change curve and data transmission rate change curve within the standard data transmission time period, and the operating state parameters include the current change curve, voltage change curve, and power change curve within the standard data transmission time period. The communication data refers to the data interaction frequency;

[0063] Establish a data extraction relationship between the multi-level transmission node analysis module and the database, and extract the standard network quality parameters and standard operating state parameters corresponding to each power transmission device stored in the database;

[0064] Compare the operating state parameters and network quality parameters of each power transmission device with the standard network quality parameters and standard operating state parameters corresponding to each power transmission device to obtain the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate, and data transmission rate compliance rate corresponding to each power transmission device;

[0065] Through the calculation formula , calculate the first node selection coefficient corresponding to each power transmission device ;

[0066] Through the calculation formula:

[0067] , calculate and obtain the comprehensive power transmission node selection coefficient corresponding to each power transmission device , where represents the number corresponding to each power transmission device, , , , , respectively represent the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate, and data transmission rate compliance rate corresponding to each power transmission device, Denoted as the total amount of monitoring data corresponding to each power transmission device, 、 Denote respectively the number of control commands and the total amount of data of control commands corresponding to each power transmission device, 、 Denote respectively the data interaction frequency and the total amount of communication data corresponding to each power transmission device, 、 Denote respectively the influence weights of preset operating state parameters and the influence weights of network quality parameters, 、 Denote the influence weights of preset control commands and the influence weights of communication data.

[0068] Extract the interval of each comprehensive power transmission node selection coefficient corresponding to each level of transmission node stored in the database, and screen the comprehensive power transmission node selection coefficient corresponding to each power transmission device according to the interval of each comprehensive power transmission node selection coefficient corresponding to the level of transmission node, so as to obtain each power transmission device corresponding to each level of transmission node;

[0069] Extract the geographical location information corresponding to each power transmission device stored in the database, where the geographical location information includes the straight-line distance between each power transmission device and each adjacent power transmission device, and obtain the straight-line distance between each upper-level power transmission node and each lower-level power transmission node according to the screening of each power transmission device corresponding to each level of transmission node;

[0070] According to the preset distance interval, conduct a preliminary division to obtain each lower-level power transmission node corresponding to each upper-level power transmission node. If there is a lower-level power transmission node corresponding to multiple upper-level power transmission nodes, then classify this power transmission node into the upper-level power transmission node corresponding to the maximum comprehensive power transmission node selection coefficient. If there are unclassified lower-level power transmission nodes, then classify this lower-level power transmission node into the upper-level power transmission node with the closest distance, and record the transmission node level corresponding to each power transmission device, the upper-level power transmission node corresponding to each power transmission device, and each lower-level power transmission node as the transmission node information corresponding to each power transmission device.

[0071] The multi-level encryption transmission module is used to analyze and control according to the transmission node information corresponding to each power transmission device, and realize the encrypted transmission of the set of data to be encrypted of each power transmission device, so as to obtain the multi-level encryption transmission result of each power transmission device.

[0072] Furthermore, the specific execution method of the multi-level encryption transmission module is as follows:

[0073] Transmit the transmission node information corresponding to each power transmission device through the data transmission port of the power control center;

[0074] Each power transmission device receives the transmission node information corresponding to each power transmission device through the data receiving port;

[0075] Generate a set of random numbers through a strong random number generator, match the time points corresponding to each secret key with any random number in the set of random numbers, and record the random number corresponding to the time point corresponding to each secret key as the number corresponding to the time point of each secret key, and screen to obtain the numbers corresponding to each secret key.

[0076] Generate a series of random numbers through a strong random number generator, calculate the mean value corresponding to the series of random numbers, and record the random number with the smallest difference from the mean value corresponding to the series of random numbers as the target random number.

[0077] Match the target random number with the numbers corresponding to each secret key, calculate the difference between the target random number and the numbers corresponding to each secret key, and screen the secret key corresponding to the number with the smallest difference, which is recorded as the secret key corresponding to the power transmission device.

[0078] Encrypt the data set to be encrypted corresponding to the power transmission device through the secret key corresponding to the power transmission device to obtain the encrypted data corresponding to the power transmission device, transmit the secret key to the power control center through the secret key transmission port of the power transmission device, and transmit the encrypted data corresponding to the power transmission device and the device number to the upper-level power transmission node corresponding to the power transmission device through the encrypted data transmission port of the power transmission device.

[0079] The upper-level power transmission node receives the encrypted data and data numbers of each corresponding lower-level power transmission node through the encrypted data receiving port, encrypts the data set to be encrypted of itself, the encrypted data and data numbers of each received lower-level power transmission node through the secret key corresponding to the upper-level power transmission node, and transmits the encrypted data corresponding to the upper-level power transmission node and the device number to the upper-level power transmission node corresponding to the upper-level power transmission node through the encrypted data transmission port corresponding to the upper-level power transmission node until the encrypted data receiving port of the power control center receives the encrypted data and device numbers transmitted by each highest-level transmission node, and records the encrypted data and device numbers received by the encrypted data receiving port of the power control center transmitted by each highest-level transmission node as the multi-level encrypted transmission results of each power transmission device.

[0080] The above are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A control system for a high-security multi-hop power transmission network based on WAPI technology, characterized in that: Including: Key generation module: used to create a set of keys for each power transmission device; The specific execution method of the key generation module is as follows: By using a key generator at the WAPI terminal of each power transmission device to create consecutive keys, a set of keys corresponding to each power transmission device is obtained, where the set of keys includes each key corresponding to each power transmission device and the time point corresponding to each key; Data acquisition module: used to acquire the data to be transmitted of each power transmission device to obtain a set of data to be encrypted for each power transmission device; Multi-level transmission node analysis module: used to analyze the encrypted data received by the power control center to obtain the transmission node information corresponding to each power transmission device; The specific execution method of the multi-level transmission node analysis module is as follows: Receive the encrypted data and device numbers transmitted by each highest-level transmission node through the encrypted data receiving port of the power control center, and receive the key information of each power transmission device through the corresponding key receiving port of the power control center; Where the key information includes the numbers and keys of each power transmission device; Parse the encrypted data and device numbers transmitted by each highest-level transmission node through the numbers and keys of each power transmission device received by the power control center to obtain a set of encrypted data corresponding to each power transmission device; Extract information from the set of encrypted data corresponding to each power transmission device to obtain the monitoring data, total amount of monitoring data, number of control instructions, total amount of control instruction data, communication data, and total amount of communication data corresponding to each power transmission device. The detection data includes the operating state parameters and network quality parameters of the power transmission device, where the network quality parameters include the network signal strength change curve and data transmission rate change curve within the standard data transmission time period, and the operating state parameters include the current change curve, voltage change curve, and power change curve within the standard data transmission time period. The communication data refers to the data interaction frequency; Establish a data extraction relationship between the multi-level transmission node analysis module and the database, and extract the standard network quality parameters and standard operating state parameters corresponding to each power transmission device stored in the database; Compare the operating state parameters and network quality parameters of each power transmission device with the standard network quality parameters and standard operating state parameters corresponding to each power transmission device to obtain the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate, and data transmission rate compliance rate corresponding to each power transmission device; Through the calculation formula , the first node selection coefficients corresponding to each transmission device are calculated ; Through the calculation formula: Calculate and obtain the comprehensive transmission node selection coefficient corresponding to each transmission device where represents the number corresponding to each transmission device, , , , , respectively represent the current compliance rate, voltage compliance rate, power compliance rate, network signal strength compliance rate, and data transmission rate compliance rate corresponding to each transmission device, represents the total amount of monitoring data corresponding to each transmission device, , respectively represent the number of control instructions and the total amount of data of control instructions corresponding to each transmission device, , respectively represent the data interaction frequency and the total amount of communication data corresponding to each transmission device, , respectively represent the influence weight of preset operating state parameters and the influence weight of network quality parameters, , represent the influence weight of preset control instructions and the influence weight of communication data, represents the number of each transmission device; Extract the intervals of comprehensive power transmission node selection coefficients corresponding to each level of transmission nodes stored in the database, and screen the comprehensive power transmission node selection coefficients corresponding to each power transmission device according to the intervals of comprehensive power transmission node selection coefficients corresponding to each level of transmission nodes to obtain each power transmission device corresponding to each level of transmission nodes; Extract the geographical location information corresponding to each power transmission device stored in the database, where the geographical location information includes the straight-line distance between each power transmission device and each adjacent power transmission device, and obtain the straight-line distance between each upper-level power transmission node and each lower-level power transmission node according to the screening of each power transmission device corresponding to each level of transmission nodes; Preliminary division is initially carried out according to a preset distance interval to obtain the subordinate transmission nodes corresponding to each superior transmission node. If there is a subordinate transmission node corresponding to multiple superior transmission nodes, then this transmission node is classified into the superior transmission node corresponding to the maximum comprehensive transmission node selection coefficient. If there are subordinate transmission nodes that have not been classified, then these subordinate transmission nodes are classified into the nearest superior transmission node. Record the transmission node levels corresponding to each transmission device, the superior transmission nodes corresponding to each transmission device, and each subordinate transmission node as the transmission node information corresponding to each transmission device; Multi-level encryption transmission module; It is used to perform analysis and control according to the transmission node information corresponding to each transmission device, and realize the encrypted transmission of the data set to be encrypted of each transmission device to obtain the multi-level encrypted transmission results of each transmission device.

2. The control system of a power transmission high-security multi-hop network based on WAPI technology according to claim 1, characterized in that: The specific execution method of the data acquisition module is as follows: Obtain the monitoring data corresponding to each type of monitoring device in each transmission device at each time point and the data volume of the monitoring data at each time point; Obtain the number of control instructions corresponding to each transmission device at each time point and the data volume of the control instructions at each time point; Obtain the communication data corresponding to each transmission device at each time point and the data volume of the communication data at each time point; Obtain the preset standard data transmission time interval of the power control center, and statistically calculate the total data volume of the monitoring data, the total data volume of the control instructions, and the total data volume of the communication data within the standard data transmission time period; Establish the data set to be encrypted of each transmission device based on the monitoring data, the total data volume of the monitoring data, the number of control instructions, the total data volume of the control instructions, the communication data, and the total data volume of the communication data corresponding to each transmission device at each time point within the standard data transmission time period.

3. The control system of a high-security multi-hop power transmission network based on WAPI technology according to claim 1, characterized in that: The specific execution method of the multi-level encryption transmission module is as follows: Perform data transmission on the transmission node information corresponding to each transmission device through the data transmission port of the power control center; Each transmission device receives the transmission node information corresponding to each transmission device through the data receiving port; Generate a set of random numbers through a strong random number generator, match the time points corresponding to each secret key with any random number in the set of random numbers, and record the random number corresponding to the time point corresponding to each secret key as the number corresponding to the time point of each secret key, and screen to obtain the numbers corresponding to each secret key; Generate a series of random numbers through a strong random number generator, calculate the mean value corresponding to the series of random numbers, and record the random number with the smallest difference from the mean value corresponding to the series of random numbers as the target random number; Match the target random number with the numbers corresponding to each secret key, calculate the difference between the target random number and the numbers corresponding to each secret key, and screen the secret key corresponding to the number with the smallest difference, which is recorded as the secret key corresponding to the transmission device; Perform data encryption on the data set to be encrypted corresponding to the transmission device through the secret key corresponding to the transmission device to obtain the encrypted data corresponding to the transmission device. Transmit the secret key to the power control center through the secret key transmission port of the transmission device, and transmit the encrypted data corresponding to the transmission device and the device number to the superior transmission node corresponding to the transmission device through the encrypted data transmission port of the transmission device; The upper-level power transmission node receives the encrypted data and data numbers corresponding to each lower-level power transmission node through the encrypted data receiving port, encrypts its own set of data to be encrypted, the encrypted data and data numbers received from each lower-level power transmission node using the secret key corresponding to the upper-level power transmission node, and transmits the encrypted data and device number corresponding to the upper-level power transmission node to the upper-level power transmission node corresponding to the upper-level power transmission node through the encrypted data transmission port corresponding to the upper-level power transmission node, until the encrypted data receiving port of the power control center receives the encrypted data and device numbers transmitted by each top-level transmission node, and records the encrypted data and device numbers received by the encrypted data receiving port of the power control center from each top-level transmission node as the multi-level encrypted transmission results of each power transmission device.

Images