56results about How to "Increase unpredictability" patented technology

The invention discloses an SM4 encryption method based on an FPGA, and relates to the technical field of data encryption, and the method comprises the steps: obtaining to-be-encrypted plaintext data; a plurality of SM4 encryption cores are configured on the FPGA chip to perform parallel encryption operation on plaintext data to be encrypted; wherein each SM4 encryption core adopts a pipeline architecture, and the pipeline architecture comprises an access device, a round function arithmetic unit and a key adder; an extraction circuit based on physical noise and integrated on the FPGA chip is utilized to generate N-bit random numbers as encryption keys of each SM4 encryption core; handshake signals are collected to calculate the operation efficiency of each SM4 encryption core; adjusting FPGA resource allocation among the SM4 encryption cores by adopting a priority scheduling algorithm according to the operation efficiency; in the encryption operation process, power consumption equalization is carried out by adopting polynomial and logical operation hybrid calculation, and time sequence randomization is carried out by adopting a random waiting period. Aiming at the problem of weak anti-difference sensitivity in the prior art, the side channel attack resistance is improved.

The invention discloses a key generation and distribution system based on quantum random numbers, and relates to the technical field of quantum key distribution. The system comprises a quantum random number generation module, a light source control module, a quantum key distribution module, a detector module, a data processing module, a communication control module, a network anomaly monitoring module and an identity authentication module. According to the secret key generation and distribution system based on the quantum random number, the quantum random number generator generates a real unpredictable random number sequence by using the randomness principle in quantum mechanics, and the random number sequence is taken as the basis of the secret key, so that the unpredictability and the safety of the secret key are fundamentally improved; compared with a traditional secret key generation method based on a pseudo-random number, the quantum random number has higher randomness and lower predictable risk, various cryptographic analysis attacks can be effectively resisted, the uncrackability of the secret key is ensured, and an unbreakable safety guarantee is provided for information communication.

The invention discloses an unmanned aerial vehicle path planning method based on global search and meta-heuristic optimization, and the method comprises the steps: firstly building an unmanned aerial vehicle path planning model under complex constraints, determining a fitness function and a constraint condition thereof, setting algorithm initialization parameters, carrying out the chaotic mapping of an initialization population position, and carrying out the optimization of the algorithm; and performing loop iteration solution by using a meta-heuristic optimization algorithm, outputting a global optimal path, finally realizing the global optimal path on the unmanned aerial vehicle, and calculating a flight distance corresponding to the optimal path to complete unmanned aerial vehicle path planning. According to the method, a meta-heuristic algorithm, namely a crown porcupine algorithm, is combined with tabu search, the global search capability is enhanced, and meanwhile, population initialization is optimized in combination with chaotic mapping, so that the randomness and unpredictability are increased, the algorithm can converge more quickly, and the robustness of the algorithm is improved. The method has obvious advantages in solving the problem of path planning with complex environment and complex constraint, and solves the problem of path planning of the unmanned aerial vehicle in the three-dimensional complex mountain environment.

The invention relates to an intelligent verification code generation and anti-refreshing method and system and computer equipment. The method comprises the following steps: performing multi-modal generation processing on verification code content to obtain original verification code data; performing multi-dimensional feature extraction on the user interaction behavior to obtain user behavior feature data; inputting the original verification code data and the user behavior feature data into a double attention network for fusion processing to obtain fused feature data; performing dynamic difficulty assessment calculation based on the fused feature data to obtain verification code difficulty adjustment parameters; performing difficulty adjustment on the original verification code data according to the verification code difficulty adjustment parameter to obtain target verification code data; and based on the fused feature data and the target verification code data, performing multi-dimensional anti-refreshing rule analysis, and generating a self-adaptive anti-refreshing rule set. According to the method, the multi-modal data can be comprehensively utilized, the difficulty is dynamically adjusted, and the intelligent verification code of the anti-refreshing rule is adaptively generated.

The invention relates to the technical field of electric power data acquisition with an encryption function, and discloses an electric power data acquisition terminal with an encryption function and a method. By combining the environment data and the equipment state, the encryption process enhances the security and adaptability of data encryption. Environment and equipment data input ensures that encryption results are different, and potential safety hazards caused by static data sources are avoided. The data are reasonably combined through a seed generation formula, it is ensured that the seeds have enough randomness, and the brute force cracking risk is reduced. The key generation strategy generates a unique key through a seed, so that the attack resistance of the system is improved. The key matrix and random number generation strategy improves the unpredictability of the encryption algorithm. And dynamically updating the encryption matrix to prevent the encryption matrix from being cracked in long-term use. In the whole process, comprehensive protection of the data in acquisition, encryption and transmission is ensured, and the data is effectively prevented from being tampered or stolen.

The invention discloses a decentralized Roollup sequencer construction method, and relates to the field of Roollup sequencer construction, and the method comprises the steps: deploying a plurality of intelligent contracts at an L1 layer of a decentralized Roollup sequencer; in the L2 layer, an improved WRR algorithm is adopted, the credible random number generated by the L1 layer is combined, a linear mapping technology is adopted, multiple putters are screened, transactions of the L2 layer are packaged and sorted, transaction blocks are determined, and the final putters are screened out through a competition process; submitting the transaction block generated by the final putter to the remaining putters for voting and auditing, and monitoring the operation conditions of all putters by a plurality of candidates; and when it is found that the transaction block submitted to the L2 layer by the final proposal is illegal, identifying the illegal transaction block by using a suspicious label mechanism, rolling back the transaction with the suspicious label to the L1 layer for examination, and enabling the candidate to initiate challenge to the final proposal through a challenge mechanism so as to improve the decentration degree of the whole system.

The invention discloses an inter-satellite link secure transmission method based on a hybrid covert strategy, and belongs to the field of electronic communication. According to the invention, more randomness and friendly interference are introduced from three layers of a network layer, an MAC layer and a physical layer, and potential eavesdroppers are confused; in a network layer, a random routing unit is adopted, a plurality of routing paths meeting communication requirements are dynamically selected to replace a single optimal path, and a selection probability is distributed to each routing path according to routing metrics. In the MAC layer, the spectrum sharing technology is utilized to distribute less power for the information needing to be hidden, so that the signal detection probability is reduced, and the communication security is improved. In a physical layer, a rate division multiple access unit and a superposition coding technology are adopted, so that a plurality of users can efficiently share the same time-frequency resource at the same time. According to the invention, the communication efficiency can be improved, and the transmission randomness and complexity can be further improved, so that the communication security is enhanced.

The invention relates to a network attack defense method and system for a distributed new energy grid-connected system, and the method comprises the steps: generating a dynamic defense strategy based on an IP address for the network abnormal flow and an attack sensing result when a new energy terminal is accessed; generating a random routing scheme based on a preset depth deterministic policy gradient; and performing dynamic defense in combination with the dynamic defense strategy and the random routing scheme. The method has the advantages that the comprehensiveness and comprehensiveness of network attack defense of the new energy grid-connected system are improved, and the network and data security of the new energy grid-connected system is guaranteed.

The invention discloses an unmanned aerial vehicle task allocation method based on a Levy flight parrot optimization algorithm, and the method comprises the following steps: S1, carrying out the modeling of an unmanned aerial vehicle task allocation scene based on a graph theory method, and building a task allocation mathematical model; s2, setting initialization parameters of a parrot optimization algorithm; s3, performing loop iteration on the optimization process: setting solving parameters and iteration ending conditions, recording a globally optimal solution of each iteration in the solution space, and performing parameter and position updating after one-time loop ending until the iteration ending conditions are met; and S4, outputting the distribution sequence, and calculating the minimum voyage cost of the whole process. On the premise of considering the voyage constraint of the unmanned aerial vehicle, the method is more suitable for the actual task condition, the chaotic mapping is used for optimizing the initialized population, the Levy flight strategy is adopted in the optimization process, the global search ability is higher, and the method is more suitable for solving the practical problem; the problem of unmanned aerial vehicle task allocation can be solved to a certain extent.

The invention discloses an encryption method based on an RSA algorithm, and relates to the technical field of data encryption, and the method comprises the steps: collecting to-be-encrypted data; generating a session key of the to-be-encrypted data by adopting a symmetric block encryption algorithm RC5; encrypting the generated session key by adopting an RSA public key; encrypting the to-be-encrypted data by adopting a symmetric block encryption algorithm RC5 and the encrypted session key to generate encrypted data, dividing the to-be-encrypted data into N1 groups, and encrypting the grouped to-be-encrypted data by calling the RC5 algorithm in parallel through multiple threads; and performing confusion processing of sequentially and circularly exchanging adjacent data positions on the encrypted data to obtain the encrypted data. Aiming at the low encryption security based on an RSA algorithm in the prior art, the method comprises the following steps: collecting to-be-encrypted data, and generating a session key based on data content by using an RC5 algorithm; encrypting the session key by adopting an RSA algorithm; an RC5 algorithm is called in parallel for encryption; and block position confusion processing is carried out on the encrypted data, so that the encryption security of the RSA algorithm is improved.

The invention discloses a computer network security protection method, which relates to the field of computer security technology and comprises the following steps: strengthening login control, formulating security strategies, key generation, generating a key K1 and a key K2 in a data transmission process through a key management service, extracting a user code D, a timestamp T and a hash value H in the key K1 through system operation, combining the key K1 and generating a key K3 according to the timestamp T and the user code D, data encryption, updating and maintaining the key encryption system, daily monitoring and recording, and having multiple means such as using a multi-key encryption method, introducing a timestamp, using a random salt value, adding a random initialization vector, combining an encryption block and a data block, and combining multi-layer encryption and verification information, thereby effectively improving the security and unpredictability of data transmission, thereby enhancing the effect of the quality of computer network security protection.

The invention belongs to the field of wireless communication, and discloses a power wireless local area network information security transmission method and a related device, and the method comprises the steps: obtaining a current physical layer leader sequence and a physical layer header, and carrying out the processing of to-be-transmitted data on the basis of the current physical layer leader sequence and the physical layer header, thereby achieving the dynamic operation of the physical layer leader sequence and the physical layer header. Meanwhile, when data to be transmitted are modulated by adopting an orthogonal frequency division multiplexing technology, a positive value random quantity is introduced to modify a cyclic prefix selection area and length and modify subcarrier parameters, so that the randomness and unpredictability of signal transmission are further improved, and the hiding of physical layer waveform parameters is realized. By dynamically switching the waveform factors of the physical layer, an attacker is difficult to capture and identify the characteristic information of the wireless signal due to the dynamic change, so that the anti-reconnaissance and anti-interception capabilities of the system are greatly improved. A parameter dynamic change rule can be self-formulated for the power wireless local area network, so that the powerful supervision capability of the power industry on the wireless local area network technology can be realized.

The invention relates to the technical field of payment method management, in particular to a payment method based on an NFC electronic tag. The method comprises the following steps: collecting NFC electronic tag payment signals and mobile terminal data, carrying out signal synchronization correction, fusing payment features, generating fused payment feature data, carrying out random salt value mixing processing on the data, generating mixed semi-random data, generating a one-time secret key through one-time encryption coding, and carrying out one-time encryption coding on the mixed semi-random data. The method comprises the following steps: extracting feature data of a mobile terminal, establishing an encrypted communication channel by using a one-time key, processing the one-time key through random position replacement, performing multi-path distribution by using the encrypted channel, collecting operation data of a payer terminal, performing payment authorization verification according to the collected data, ensuring the legality of payment operation, and improving the payment efficiency. And finally executing a payment action to complete intelligent payment of the NFC electronic tag. The payment method based on the NFC electronic tag is safer and more efficient.

The invention discloses an encryption communication method and system based on biological genetic coding chaos driving, and the method comprises the steps: receiving an original bit stream and an initial secret key, and generating a chaos sequence group according to the initial secret key through two hyperchaos models; performing DNA coding encryption on the original bit stream by using the chaos sequence to obtain a gene transmission sequence, and performing DNA decoding on the gene transmission sequence to obtain a transmission bit stream; performing constellation mapping on the transmission bit stream to obtain a constellation diagram, and performing subcarrier scrambling, symbol scrambling and constellation rotation on the constellation diagram according to the chaos sequence; performing OCDM modulation on the constellation diagram through an inverse discrete Fresnel transformation matrix to obtain a transmission signal; hiding the initial key in a frame header of a transmission signal, and sending the transmission signal to a receiver through a transmitter; according to the invention, multi-layer encryption of the OCDM signal and dynamic secret key follow-up transmission are realized.

The invention relates to a random NAT (Network Address Translation) mechanism implementation method based on IPv6 (Internet Protocol Version 6) addresses, terminal equipment and a storage medium. The method comprises the following steps: S1, presetting an IPv6 secondary throwing pool with multiple groups of IPv6 addresses; s2, when an extranet access request sent by an enterprise internal client is obtained, an NAT source address is randomly selected from the IPv6 secondary throwing pool, and the extranet access request comprises a real IPv6 address of the enterprise internal client; s3, replacing the real IPv6 address of the enterprise internal client with the NAT source address randomly selected in the step S2 to generate a new extranet access request to communicate with the extranet; and S4, when a network data packet returned by the extranet is obtained, forwarding the network data packet to the corresponding enterprise internal client according to the internal mapping relationship, and by the method, when the enterprise internal client initiates extranet access, the concealment and security when the intranet terminal accesses the extranet can be improved.

The invention discloses an encryption communication method and system based on probability shaping and double single side band modulation, and the method comprises the steps: receiving an original bit stream and an initial secret key, and generating a chaotic sequence according to the initial secret key through employing a hyperchaotic model; calculating according to the chaos sequence to obtain a mask factor; performing constellation mapping processing on the original bit stream to obtain a constellation diagram; performing rotation encryption on the constellation diagram according to the mask factor to obtain an encrypted signal; performing QPSK modulation on the encrypted signal to obtain a left sideband carrier signal; performing constellation mapping after performing repeated superposition on the initial key to obtain a key signal; probabilistic shaping and QPSK modulation are carried out on the key signal to obtain a right sideband carrier signal; superposing the left sideband carrier signal and the right sideband carrier signal to obtain a mixed signal, and sending the mixed signal to a receiver through a transmitter; and the security and reliability of key transmission are improved while the signal transmission efficiency is ensured.

The present invention discloses a key generation and distribution system based on quantum random numbers, and the present invention relates to the field of quantum key distribution technology. The system includes a quantum random number generation module, a light source control module, a quantum key distribution module, a detector module, a data processing module, a communication control module, a network anomaly monitoring module, and an identity authentication module. The key generation and distribution system based on quantum random numbers uses the randomness principle in quantum mechanics through a quantum random number generator to generate a truly unpredictable random number sequence, and uses the random number sequence as the basis of the key, which fundamentally improves the unpredictability and security of the key. Compared with the traditional key generation method based on pseudo-random numbers, the quantum random number has higher randomness and lower predictability risk, can effectively resist various cryptanalysis attacks, ensure the unbreakability of the key, and provide an indestructible security guarantee for information communication.

The invention relates to the technical field of wireless communication, and provides a communication method and system based on radio frequency spectrum intensity, a computer readable medium and electronic equipment. According to the communication method based on the radio spectrum intensity, test data are initialized to detect spectrum intensity data of a wireless network in real time, then the spectrum intensity data are preprocessed to extract a first characteristic parameter of the current spectrum intensity, and an encryption key and a dynamic key sequence are generated according to the first characteristic parameter. This process not only ensures the security of data transmission, but also enhances the complexity and unpredictability of encryption by using dynamic changes in spectral characteristics. Meanwhile, the optimal transmission path can be intelligently selected according to the second characteristic parameter determined according to the spectrum intensity data, and the data transmission efficiency is optimized. And finally, the encrypted data is safely transmitted to the receiver through the selected transmission path, and the whole process not only ensures the security of communication, but also improves the transmission efficiency and flexibility.

The invention discloses a data processing method and a related device, and the method comprises the steps that first equipment obtains a data calling password, and generates a first random number after verification succeeds; encrypting the data calling password and the first random number through a first encryption algorithm, generating a first message, and sending the first message to the second device; the second device decrypts the first message, generates a second random number, generates a secret key through a remainder operation, encrypts the secret key by using a second encryption algorithm and sends the encrypted secret key to the first device; and after decrypting the key, the first device encrypts the secret-related data according to the key and a second encryption algorithm. Therefore, the first device processes the secret-related data according to the secret key and the second encryption algorithm, so that the secret-related data with a large data size can be processed through the second encryption algorithm with higher efficiency, and the encryption and decryption speed is improved.

The present invention discloses a cross-modal collaborative adversarial attack method and device, which relates to the field of artificial intelligence security. It is used to solve the current problems of difficulty in modeling cross-modal collaborative attacks and difficulty in building optimization mechanisms in the field of large language model adversarial attacks. The cross-modal collaborative attack provided by this method can circumvent these security alignment mechanisms based on single-modal content feedback, thereby breaking through existing protection measures and increasing the complexity and unpredictability of attacks; furthermore, by optimizing adversarial perturbations in key cross-modal semantic subspaces and combining historical and future gradient information, the efficiency, convergence speed and stability of perturbation optimization can be improved, avoiding falling into local optimal solutions, thereby improving the practicality and operability of attacks.

The present invention discloses a data encryption method based on a data warehouse, which belongs to the field of data processing technology and includes the following steps: S1, generating parsing clues for a data warehouse; S2, generating parsing clue values ​​using the parsing clues according to the data type of the data to be encrypted; S3, obtaining a star model of the data to be encrypted and generating an identifier; S4, generating an encryption key using the parsing clue values ​​and the identifier of the data to be encrypted; S5, encrypting the data to be encrypted using the encryption key. The present invention proposes a data encryption method based on a data warehouse, which dynamically generates an encryption key according to the parsing clue values ​​and the identifier of the data to be encrypted. This method of dynamically generating a key increases the complexity and unpredictability of the key, thereby improving the security of the data.

The utility model discloses a hotel information integrated acquisition device, which belongs to the technical field of information integrated acquisition and comprises a data acquisition module, a central processing unit, a wireless communication module, a security encryption module, a face identity authentication module, a data storage module and an interactive interface. By integrating the environment sensor, the human body infrared sensor, the sound sensor, the face recognition camera and the RFID reader-writer, the device can collect hotel environment data, guest behavior information and identity recognition data in all directions, and provides detailed basic data for hotel management. By combining efficient image processing and face recognition technologies, quick and accurate customer identity authentication can be realized, service experience and security level can be improved, the central processing unit is equipped with a microprocessor, an ROM, a clock circuit and an RTOS, high efficiency of data processing and stability of system operation are ensured, and a multi-mode wireless communication module is matched, so that the service quality of the system is improved. And flexible transmission, network adaptability and acquisition efficiency of data are realized.

The invention discloses a multi-level encryption method and system under a 5G network, and relates to the technical field of digital information transmission security. Comprising the following steps: manually setting a replacement code based on the code volume of transmission data, transferring and compressing data items matched with the content of the replacement code in the transmission data by the replacement code, generating a mark suffix, generating a first-level data arrangement set by the transmission data according to the replacement code and the mark suffix, and obtaining a mark stamp at the position of the transmission data based on the replacement code, the mark stamps act on the first-level data arrangement set and generate a second-level data arrangement set, and the second-level data arrangement set generates a final-level data arrangement set according to encryption logic. According to the method, the replacement code is set by analyzing the volume of the transmission data, so that the replacement code compresses the volume of the transmission data at the initial end of the uplink direction of the 5G network transmission channel, and the situation that the transmission efficiency in the 5G network channel is reduced due to the fact that the volume of the transmission data is too large in the encryption process is relieved to a certain extent.

The invention discloses a data encryption method based on a data warehouse, and belongs to the technical field of data processing, and the method comprises the following steps: S1, generating an analysis clue for the data warehouse; s2, according to the data type of the to-be-encrypted data, utilizing the analysis clue to generate an analysis clue value; s3, acquiring a star model of to-be-encrypted data, and generating an identifier; s4, generating an encryption key by using the analysis clue value and the identifier of the to-be-encrypted data; and S5, encrypting the to-be-encrypted data through the encryption key. According to the data encryption method based on the data warehouse, the encryption key is dynamically generated according to the analysis clue value and the identifier of the to-be-encrypted data, the complexity and the unpredictability of the key are increased through the mode of dynamically generating the key, and therefore the safety of the data is improved.

The invention discloses an AI data processing encryption method and device based on deep learning, and relates to the technical field of multi-modal graph embedding, and the method comprises the steps: collecting multi-modal data, and carrying out the preprocessing of the multi-modal data; features of the multi-modal data are extracted, the features of the multi-modal data are fused through a cross attention mechanism, and a multi-modal comprehensive feature vector is generated; constructing an application graph convolutional network GCN relation graph to generate a node embedding vector, and obtaining an enhanced node in combination with the multi-modal comprehensive feature vector; after data encryption is completed, data are protected through secure transmission and distributed storage, and an optimal encryption strategy is selected by using a reinforcement learning model; through a multi-modal graph embedding technology, diversified collection and efficient preprocessing of data are realized, a data relation graph is constructed, node embedding vectors are updated by applying a graph convolutional network GCN, enhanced node embedding vectors are generated in combination with multi-modal comprehensive feature vectors, complex relations among the data are effectively captured, and expressive force of the node embedding vectors is improved.

The present application discloses a data security processing method based on artificial intelligence, including: collecting sensitive data sequences, splitting the collected sensitive data sequences into several feasible character strings; generating characteristic character strings according to the obtained feasible character strings, obtaining the suffix characters of each characteristic character string, and obtaining the long character string of each characteristic character string according to the possibility of occurrence; selecting a character set and a coding length, and defining the coding structure; generating a compensation code according to the character set; generating an equal-length code according to the coding rules based on the obtained long character string, and if there are redundant positions in the generated equal-length code, selecting a compensation code from the compensation code library for filling; inserting characters at random positions of the equal-length code. The equal-length code and the compensation code make the statistical characteristics of the original character string hidden, increase the difficulty of cracking, and make the distribution of the compensation code difficult to predict by generating random positions.

The invention discloses an equipment handle management method and device, equipment and a storage medium. Through an abstraction layer of an operating system, when an access request of a program to a kernel object is received, the kernel object is searched according to the access request, a handle generation request is sent to a quantum random number generator, and a handle associated with the kernel object is obtained; acquiring a public key generated by the program through an asymmetric encryption algorithm, encrypting the handle through the public key, so that the program decrypts and acquires the encrypted handle through a private key generated by the asymmetric encryption algorithm; and when a handle use-up signal returned by the program is received, releasing the association between the handle and the kernel object, and adding the handle to a recovery list. According to the method and the device, the device handle can be prevented from being hostile attacked in the generation, transmission and recovery processes of the abstraction layer, so that the safety of the device handle is improved.

The invention relates to the technical field of dynamic simulation, and discloses an electric fireplace three-dimensional dynamic flame simulation generation method and system, and the method comprises the steps: obtaining a flame base region, carrying out temperature gradient solution and heat source intensity mapping, obtaining temperature gradient distribution and heat source intensity distribution, and carrying out heat flow direction vector screening, and obtaining an initial thermal driving vector; according to the initial thermal driving vector, acceleration weighting calculation is carried out to obtain a final acceleration, and spatial displacement calculation is carried out to obtain an actual track sequence; according to the actual track sequence, displacement correction is carried out, a coherent path sequence is generated, abnormity recognition is carried out, and an abnormal path is obtained; calculating the variance of the initial speed sequence according to the coherent path sequence to obtain an inter-frame continuity result, and performing trajectory smoothing according to the abnormal path to obtain an optimized trajectory sequence; and performing three-dimensional texture generation according to the optimized track sequence to obtain flame texture output. The method can realize dynamic high-precision simulation of flame.

The invention discloses a terminal fingerprint generation method and device, equipment, a medium and a product, and the method comprises the steps: obtaining a first equipment feature vector and a feature weight vector, the first equipment feature vector is used for indicating the information of multiple terminal equipment, and the feature weight vector is determined according to a target training model; the target training model is obtained by training the training model through a training data set and a back propagation algorithm until a preset convergence condition is reached, and the training data set comprises feature vector samples and corresponding category labels. Performing normalization processing on each subitem in the first equipment feature vector to obtain a second equipment feature vector; and weighting the second equipment feature vector through the feature weight vector to obtain a fusion vector, and generating the terminal fingerprint of the terminal equipment according to the nonlinear activation function, the hash function and the fusion vector. Therefore, the security of accessing the digital twin application can be effectively improved by generating the unique terminal fingerprint.

The invention relates to the field of network configuration, and discloses a Mixnet network configuration method and device, and the method achieves the configuration of a Mixnet network based on a decentralized node selection mechanism of a VRF, improves the safety and anonymity of the network while avoiding the centralization problem, and improves the reliability of the network. The method comprises the following steps: dividing a Mixnet network configuration process into a plurality of configuration periods including a release stage, a setting stage and a selection stage; in the release stage of any configuration period, the weight information is released on the bulletin board; in the setting stage of any configuration period, generating a pseudo-random output value by executing VRF based on the public random seed, and outputting the pseudo-random output value to the bulletin board; and in a selection stage of any configuration period, determining a selected node set according to a pseudo-random output value and weight information, and distributing nodes in the selected node set to different levels of the Mixnet network to form a network topology structure.