1752 results about "Communications security" patented technology

The invention provides an encryption transmission method and system of a wireless information transmission communication base station, relates to the technical field, discloses the encryption transmission method of the wireless information transmission communication base station, and belongs to the technical field of wireless communication. The method comprises the following steps: receiving a communication signal and extracting identity authentication information and a signal characteristic parameter; performing identity authentication scoring based on a deep neural network, performing signal feature scoring through spectral analysis, and constructing a communication security assessment model; a key pair is generated by adopting an elliptic curve cryptographic algorithm, and data is encrypted after being subjected to confusion transformation and diffusion transformation; transmitting a key by using a quantum key distribution technology; and selecting an optimal transmission channel based on the operation state data of the communication base station, and performing data transmission by adopting interleaving coding and adaptive power control technologies. According to the invention, the security and transmission reliability of wireless communication are improved, and the anti-interference capability is enhanced.

The invention discloses a data communication method and system based on information security, and belongs to the technical field of data communication, and the data communication method comprises the stages of preparation, transmission, intrusion detection and defense, receiving verification and cleaning ending. The two parties authenticate and exchange keys during preparation; encrypting data by using a symmetric key and an AES algorithm; automatic defense is performed after intrusion detection; the receiver verifies the data; and cleaning the resources at the end, and performing log optimization on the system. According to the invention, through innovatively improving the intrusion detection and defense method, based on real-time network flow monitoring, intrusion analysis based on machine learning and an automatic defense mechanism, the detection accuracy and efficiency are greatly improved, and false alarms and missing alarms are reduced; defense capability and flexibility are enhanced, attacks are intelligently blocked and isolated, and cooperative emergency response is rapid; data communication security technology progress and expansion are promoted, and network security is powerfully guaranteed.

The invention discloses a bidirectional authentication secure mobile communication method and system based on a public key digital fingerprint, and belongs to the technical field of communication security. The method specifically comprises the following steps: S1, digital certificate application and issuing: a mobile terminal and a service server respectively use an encryption algorithm to generate an asymmetric key pair which comprises a public key and a private key, an entity submits a CSR file which comprises a public key, entity identity information and an extension field to a CA, and the CA strictly audits the entity identity and issues a digital certificate; and performing digital signature on the public key and the entity information by using a CA private key after the auditing is passed. Two-way identity authentication is achieved, communication safety is improved, a traditional scheme only supports one-way authentication of a client to a server and is prone to phishing attack and identity false use, digital certificates are exchanged before communication between a mobile terminal and a service server, the legality of the certificates is verified through a public key of a CA root certificate, and the authenticity of the identities of the two parties is ensured. A bidirectional authentication mechanism effectively prevents man-in-the-middle attack and identity counterfeiting problems, and the security risk is greatly reduced.

The invention discloses a dual-electric brake boosting system for a heavy-duty vehicle and a coordinated control method of the dual-electric brake boosting system, and relates to the technical field of vehicle brake control. The invention discloses a dual-electric brake power-assisted system for a heavy-duty vehicle and a coordinated control method thereof. The coordinated control method comprises the following steps that S1, a multi-source sensor synchronously collects and preprocesses wheel speed, current, suspension and pedal signals; s2, estimating the load in real time through Kalman filtering, and outputting a dynamic load coefficient to guide distribution; s3, triggering interruption when the pedal force change rate exceeds the threshold value, and directly outputting the maximum braking force; s4, dynamically distributing the braking force, predicting the temperature rise, and adjusting the output weights of the double boosters; s5, outputting a digital twinborn verification theory, and starting a compensation algorithm after deviation overrun; s6, encrypting an instruction by a TSN protocol, and ensuring low-delay transmission and communication security; s7, a closed-loop optimization link is formed based on the actual braking data calibration model; the method has the beneficial effect that the real-time performance, safety and reliability of the braking system are comprehensively improved.

The invention discloses a block chain multi-node secure communication method for an industrial internet, and the method comprises the steps: constructing a multi-chain cooperation mechanism, and obtaining an inter-chain interaction path table; determining a task partition optimization scheme and inter-chain interaction path update data based on the inter-chain interaction path table; matching an adaptive node resource for each task according to a task partition optimization scheme; determining an encryption mechanism between a cross-chain protocol and a block chain according to the security requirement of the task; constructing a multi-level block chain node hierarchical architecture and an intra-chain and inter-chain communication architecture, and formulating a parallel communication scheduling scheme; formulating a dynamic load balancing strategy based on the node resource use condition and the task execution state; and obtaining the task execution progress and the resource use condition of each block chain node, and adjusting the task scheduling and cross-chain communication path. Through the multi-dimensional collaborative design, the execution efficiency, the resource utilization rate and the communication security of the industrial internet are remarkably improved, and the stability and the reliability in a complex multi-chain collaborative scene are ensured.

The invention relates to a numerical control equipment cooperative scheduling method and system based on a heterogeneous computing architecture, and aims to solve the core problems of multi-brand numerical control equipment protocol isomerism, weak digital twin generalization ability, low multi-objective optimization efficiency, quantum era communication security and the like in the industrial internet. Real-time analysis and unified format conversion of 18 industrial protocols are realized through a PDSA-Chip hardware-level protocol conversion module; in combination with a transfer learning digital twinning technology, cross-brand equipment parameter self-calibration is completed within 72 hours; a quantum annealing and NSGA-III collaborative optimization algorithm is adopted, the machining parameter optimization period is shortened to 1 / 3 of that of a traditional method, energy consumption, precision and the service life of a tool are dynamically balanced, and the service life of the tool is prolonged by 37% in a high-load scene; an NTRU lattice encryption and chaos confusion fused anti-quantum security communication system is constructed, the G code confusion degree is larger than 98%, and SL3-level quantum attacks are defended.

The invention relates to the technical field of quantum communication security, and discloses a quantum key distribution secure communication system based on a quantum mechanics principle. The system comprises a quantum state preparation unit which controls a quantum emission device to output a quantum state sequence containing a preset polarization angle and a phase modulation photon group; a quantum channel feature extraction unit captures channel environment interference parameters and constructs a photon polarization distribution matrix; a quantum communication security evaluation unit receives the matrix, and calculates a channel security coefficient threshold through a quantum bit error rate analyzer; the quantum key dynamic optimization unit generates an optimized key segmentation strategy in combination with a security coefficient threshold and a historical key negotiation record; the quantum key rotation control unit switches quantum state modulation parameters according to a segmentation strategy and a time window; and the quantum node synchronization management unit monitors node clock offset and injects a calibration signal to realize key distribution time slot alignment. The system can dynamically cope with environmental interference, and improves the security and adaptability of quantum key distribution.

The invention discloses a method and system for quickly constructing a national secret encryption channel, and the method comprises the steps: a client and a server respectively generate a client private key and a server private key based on a sensitive data transmission scene, and apply for an SM2 algorithm certificate; based on the private key and the digital certificate, the client and the server perform a handshake process, and the handshake process comprises that the client and the server perform identity verification and negotiation by exchanging certificates, temporary public keys and signature information; based on temporary public key information exchanged between the client and the server, performing key negotiation through an SM2 elliptic curve algorithm to obtain negotiation data; and based on the session key in the negotiation data, encrypting and decrypting the communication data by using a GCM mode of the SM4 algorithm. According to the method, various negotiation parameters are optimized and simplified based on a domestic encryption algorithm, rapid establishment of the secure channel is realized, only one round-trip delay is needed in the whole process, and time and bandwidth are saved on the premise of ensuring communication security.

The invention discloses an SSL VPN security gateway communication method fused with a post quantum cryptography technology. Comprising the following steps: S1, a client and a server respectively configure a serial hybrid signature digital certificate containing an SM2 algorithm and a serial hybrid encryption digital certificate containing a PQC algorithm, and a corresponding PQC encryption key pair private key, a PQC signature key pair private key, an SM2 encryption key pair private key and an SM2 signature key pair private key; s2, newly adding a hybrid algorithm password suite using an SM2 algorithm and a PQC algorithm in a password suite list of the client, and forcibly jacking the priority of the hybrid algorithm password suite; and S3, a message structure in a handshake protocol is transformed to use a series hybrid encrypted digital certificate to realize that PQC algorithm processing is added on the basis of an original national cryptographic algorithm to realize quantum key negotiation resistance. According to the method, the PQC algorithm is added on the basis of the original national secret algorithm, and the handshake protocol is transformed, so that anti-quantum-attack key agreement and identity authentication can be realized, the communication security is remarkably improved, and meanwhile, the interoperability with the standard SSL VPN is kept.

The invention discloses a security encryption transmission system for game data, and relates to the technical field of game data encryption. Comprising a network environment data collection module, a network risk feature extraction module, a feature analysis and machine learning evaluation module, a network environment classification module, a low-risk network Hash algorithm module and a high-risk network Hash algorithm adjustment module, and various parameter information of the current network environment is comprehensively collected. According to the method, the network environment is intelligently evaluated through machine learning, the system recognizes a high-risk situation in real time, the Hash algorithm is dynamically adjusted, stronger encryption is adopted when the risk is high, the communication safety is improved, and viruses and ransomware are prevented. And when the risk is low, a fixed Hash algorithm is used, and high performance is kept. According to the mechanism, data security is effectively guaranteed, resource use is optimized, and security and system performance are balanced.

The invention discloses a quantum secret communication application security test method, system and device and a medium, and belongs to the technical field of communication security. According to the quantum secret communication application security test method, an attack detection model, a receiving and transmitting end detection model, a security performance index test model and a security result analysis model are constructed, and a security test process and a test process index are provided for the security problem of a classical communication process in quantum secret key distribution practical application; according to the method, the anti-attack capability and the security performance of a tested system are evaluated, so that the security of the quantum key distribution network is evaluated, and a corresponding test result is generated, so that the integrity and the confidentiality of a key in a transmission process are ensured, and a security evaluation reference can be provided for a power wireless public network; a communication security test verification scheme is provided for the quantum key distribution network, and the security operation of the key infrastructure is ensured.

The invention discloses a multi-node secure communication method and system based on quantum key distribution, and the method comprises the steps: evaluating multi-dimensional parameters of a quantum channel, dynamically updating a node reputation value, constructing a four-dimensional topological graph database, and generating candidate routing paths based on a Monte Carlo tree search algorithm; a state-action space is constructed by further combining reinforcement learning, and path selection is optimized by using a dual Q network and a priority experience playback mechanism; through multi-dimensional channel assessment and node reputation value dynamic updating, the defects of a traditional quantum network static routing strategy are overcome, the communication safety and efficiency are improved, and low-delay and high-reliability key distribution of a complex quantum network is supported.

The embodiment of the invention provides an IPSec hybrid anti-quantum computing security method and electronic equipment, and relates to the technical field of communication security, the method comprises the following steps: when a key negotiation request sent by an initiator is received, sending a first key negotiation message to the initiator; receiving a second key negotiation message sent by the initiator; decrypting the received first encrypted information by using a private key corresponding to the encryption certificate of the responder, and decrypting the received second encrypted information to obtain a first anti-quantum encryption public key; packaging the second random key by using the first anti-quantum encryption public key, and encrypting by using the third random key to obtain third encrypted information; encrypting the third random key by using a public key in an encryption certificate of the initiator to obtain fourth encrypted information; and sending a third key negotiation message containing the third encrypted information and the fourth encrypted information to the initiator. According to the scheme, cracking of the key by quantum computing can be resisted.

The invention discloses an anti-quantum security data transmission authentication method based on an SLH-DSA, and aims to cope with communication security challenges in a quantum computing environment. The device generates a key pair locally in a registration phase and applies for an anti-quantum identity certificate from a certificate agent. In the authentication stage, a user exchanges an identity certificate and a key parameter to realize identity authentication and negotiate a shared key. In the data transmission stage, a session key is dynamically derived by using a shared key, data is encrypted in combination with a national secret symmetric encryption algorithm SM4, and integrity verification is performed by using an anti-quantum signature algorithm. The method gives consideration to security, lightweight and performance, has quantum attack resistance and forward security, is suitable for application scenarios with high data security requirements, such as industrial Internet of Things and smart power grids, and has good application prospects and popularization values.

The invention discloses a door lock communication group decomposition method and system, and the method comprises the steps: encrypting and issuing a sub-feature vector to a local storage of a corresponding member door lock through a secure channel according to the sub-feature vector generated by a main control door lock and a binding relation between the sub-feature vector and the member door lock; generating a multicast message containing a target subgroup feature vector and a digital signature according to a splitting request sent by a main control door lock; according to the result of querying the local ARP table and the subgroup registry by the multicast router, determining the subgroup to which the door lock connected with each interface belongs, and registering the corresponding sub-feature vector for the corresponding interface in the multicast forwarding table; and according to a detection message sent by each sub-group master control door lock and a confirmation message of a member door lock, the multicast router identifies and removes sub-feature vector registration of an interface which is not associated with an effective door lock, and communication group decomposition is completed. By utilizing the embodiment of the invention, safe, reliable and interface-level refined door lock group decomposition can be realized, and the splitting efficiency and the communication safety are improved.

The invention relates to the technical field of network communication security, and discloses a real-time encrypted transmission network communication security guarantee system, which comprises a dynamic fragmentation quantum resistance encryption module, a flow perception-based adaptive encryption engine, a zero-handshake continuous identity authentication module and a hardware acceleration fragmentation processing architecture, and the dynamic fragmentation quantum resistance encryption module is configured to segment a data stream into a plurality of fragments according to a time window, and independently generate an unassociated key for each fragment based on a quantum security NTRU algorithm. According to the network communication security guarantee system for real-time encryption transmission, the traditional network communication security guarantee technology is comprehensively innovated, and the problems of static key management, encryption algorithm adaptation, data fragmentation encryption, identity authentication and encryption cooperation, quantum computing threat response and the like are successfully solved; and the performance of the system in key performance dimensions such as security, real-time performance, adaptability, reliability and anti-attack capability is obviously improved.

The invention provides a distributed power supply communication gateway resource scheduling method and system based on dual-mode communication, and relates to the technical field of carrier wireless dual-mode communication, and the system comprises a time division module, a node evaluation module, a channel real-time monitoring module, a channel strategy making module, an efficiency monitoring module and a security analysis module. According to the invention, the output of the distributed power supply is monitored in real time and the access parameters are automatically adjusted to match the power grid demand, so that the efficiency and reliability of energy management are remarkably improved, the data loss is reduced, the communication security is enhanced, the nodes of carrier wireless dual-mode communication are identified, and the time distribution of the nodes in communication is verified; according to the method, the communication network can flexibly cope with load changes, load management of the network is optimized, resource waste or congestion caused by fixed time allocation is reduced, encryption keys are dynamically updated, abnormal data modes are identified, and data safety and tamper-proof capacity are greatly improved.

The embodiment of the invention provides a quantum-fused protocol communication method and device, equipment and a storage medium, and the method comprises the steps: calling a communication interface, and transmitting a verification message to a quantum key service platform, so as to carry out the identity safety verification and apply for a session key; receiving and decrypting a first encrypted session key sent by the quantum key service platform to obtain a session key; sending the encrypted session identifier to a server, so that the server applies for a session key from a quantum key service platform; and performing encrypted communication with the server according to the session key. According to the embodiment of the invention, the whole quantum key communication process is packaged in the communication interface, so that software developed based on a traditional network interface can be simply and safely migrated to quantum. Moreover, identity security verification is carried out through the verification message, man-in-the-middle attack is prevented, and the communication security is enhanced. In addition, the client and the server encrypt and decrypt the communication data by using the same session key, thereby realizing secure encrypted communication.

The invention relates to the technical field of communication security, in particular to a communication encryption method and device, equipment, a storage medium and a computer program product. The method comprises the following steps: dynamically generating a main session key between two communication parties based on a preset key negotiation protocol; dynamically generating sub-keys according to a preset time interval based on the main session key and the key sequence; performing encryption processing on each data block in the communication data stream based on the sub-key and the encryption strategy; generating a message authentication code for each encrypted data block; adding timestamp information based on the message authentication code, and introducing a random offset into the timestamp information; and the encrypted data blocks, the message authentication code and the timestamp information are packaged into the target data message, so that the transmission security of the communication data is improved.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for physical layer security for passive Internet of Things (IoT) devices. In some aspects, a source device and a reader device may communicate via a passive wireless device, such as an IoT tag, which may reflect or backscatter signaling from the source device to the reader device. The source device, the reader device, and the passive wireless device may secure communication in a physical layer (PHY) in accordance with one or more PHY security keys. As such, the source device may transmit a first message to the passive wireless device in accordance with a first PHY security key and the passive wireless device may transmit a second message to the reader device in accordance with a second PHY security key to secure communication to and from the passive wireless device.

The invention discloses a communication data leakage detection and protection method combined with deep learning, and belongs to the technical field of communication security, and the method specifically comprises the following steps: collecting chat records, extracting keywords and emotional tendencies by using a natural language processing technology, inputting a deep learning model, and training based on annotation data, dividing work and private chat records; after a private communication encryption instruction is obtained, a private chat record is segmented into data blocks, hash values are generated and stored in block chain nodes, a symmetric encryption algorithm is used for encryption, and a secret key is customized by an employee; calculating the proportion of the two types of chat records, and starting network flow simulation if the proportion exceeds a threshold value; monitoring an access interface in real time, judging abnormal access according to identity permission, request frequency and the like, extracting a hash value when the access is abnormal, and generating a bait record according to the identity and returning the bait record; and finally, the access risk is assessed through the block chain smart contract, and if continuous abnormality occurs, a data self-destruction program is triggered to encrypt the associated data block and terminate the connection, so that the communication data security is ensured.

The invention discloses an intelligent power conversion cabinet control system and a power conversion cabinet, and relates to the technical field of power conversion cabinet control, and the system comprises a user interaction module, a touch screen and voice recognition convenient operation, and multilingual interaction; the battery management module is used for accurately monitoring parameters, quickly early warning abnormity and intelligently regulating and controlling charging and discharging; the battery replacement control module is high in identity verification speed and stable, accurate and fast in battery replacement operation; the data storage and analysis module is used for mass data storage and deep mining; the communication module is used for realizing dual-mode stable transmission and encrypted cache; the cabinet body comprises a plurality of battery cabins, the protection is comprehensive, the heat dissipation is intelligent, the modular design is beneficial to expansion, and the high-speed bus is strongly connected. The system is convenient in interaction and efficient in battery replacement. The battery management is accurate, the service life is prolonged, the data-driven operation is optimized, the communication is safe and stable, the remote monitoring is convenient, the cabinet body design is reasonable, the protection and heat dissipation are good, the modularization is flexible, the battery replacement service experience and operation benefits are powerfully improved, and the development of the intelligent battery replacement field is promoted.

The invention provides a data security risk early warning method and system based on big data analysis, and the method comprises the steps: firstly constructing a data security risk feature map, collecting a heterogeneous data set in a mobile communication network in real time through a multi-source data access interface, generating a multi-source heterogeneous data fusion stream through distributed cleaning and standardization processing, and carrying out the data security risk early warning. Then inputting the data security risk feature into a preset distributed risk feature learning network, performing feature mapping and association enhancement processing based on a data security risk feature map to obtain a real-time risk feature vector, performing big data association analysis on the real-time risk feature vector, mining a risk feature conduction dependency relationship, generating a risk propagation path weight set, and performing big data association analysis on the real-time risk feature vector; and finally, determining a risk diffusion level and a key influence node, generating a security risk early warning instruction containing a risk diffusion path identifier, and pushing the security risk early warning instruction to a mobile communication security management platform, thereby realizing accurate early warning and quick response of the data security risk, and ensuring safe and stable operation of a mobile communication network.

The invention discloses a method for applying an anti-quantum certificate to a TLS1.2 handshake process, which realizes the application of an MLDSA anti-quantum signature algorithm and an MLKEM anti-quantum key encapsulation mechanism in the handshake process by expanding a cipher suite and a signature algorithm field of a TLS1.2 protocol. The method specifically comprises the following steps: defining a cipher suite supporting MLKEM and an MLDSA signature algorithm enumeration value; the client declares algorithm support in ClientHello, and the server responds and returns a certificate chain containing the double-antibody quantum certificate; after the client verifies the certificate, the pre-master key is encapsulated by using MLKEM, and the server de-encapsulates the derived session key; and the two parties send Finished messages to each other to complete handshake. According to the scheme, on the premise that a TLS1.2 basic framework is not changed, the communication security is enhanced through double-resistance quantum algorithm integration, international and national cryptographic algorithms are supported, quantum computing attacks can be resisted, meanwhile, adaptation of the international and national cryptographic algorithms is supported, compatibility with an existing system is ensured, the security risk of a traditional cryptographic algorithm in a quantum environment is solved, and the security risk of the traditional cryptographic algorithm in the quantum environment is reduced. And a standardized solution is provided for anti-quantum upgrade of the TLS1.2 protocol.

The invention relates to the technical field of communication security, in particular to an anti-quantum identity authentication method and device.On the basis of a traditional authentication scheme, a root of trust is introduced and used for signing a public key and identity information in a storage device, signing and issuing of the storage device are completed, and the security of the storage device is improved. The identity authentication end can confirm that the public key and the identity information in the storage equipment are effective by verifying the signature of the root of trust, so that the risk of identity counterfeiting is reduced; in addition, an anti-quantum cryptographic algorithm is introduced to the root of trust and the identity authentication end, signature and verification are carried out in a mode of mixing the anti-quantum cryptographic algorithm and a national cryptographic algorithm, and higher-level security is provided.

The invention discloses an unmanned aerial vehicle assisted Internet of Vehicles cross-domain authentication method based on a block chain and federated learning, and the method comprises the steps: initializing an Internet of Vehicles system, and generating system initialization common parameters; the vehicle and the unmanned aerial vehicle complete identity registration with the control center, and the vehicle performs login verification; and respectively carrying out initial authentication and cross-domain authentication on the vehicles which are successfully logged in and verified, guaranteeing the communication security through key negotiation, and completing the cross-domain authentication of the unmanned aerial vehicle assisted Internet of Vehicles. According to the method, the reliability and the security of data in the cross-domain authentication process are realized, the privacy of the data is improved, relatively low calculation and transmission overhead in the cross-domain authentication process is realized, and the authentication efficiency is improved.

A system and method for inferring an operating system version for a device based on communications security data. A method includes identifying a plurality of sequences in communications security data sent by the device; determining an operating system type of an operating system used by the device based on the identified plurality of sequences; applying a version-identifying model to the identified plurality of sequences, wherein the version-identifying model is a machine learning model trained to output a version identifier, wherein the applied version-identifying model is associated with the determined operating system type; and determining the operating system version of the device based on the output of the version-identifying model.

The invention provides a trajectory design method and system in an unmanned aerial vehicle hidden and sensing integrated network, and the method comprises the steps: firstly deducing a multi-listener cooperative receiving signal expression and a probability density function in the sensing integrated network with multiple cooperative listeners; then deriving a minimum detection error rate expression of multi-listener collaborative detection and an optimal power division ratio expression meeting covert communication constraints based on a maximum likelihood principle; and establishing an unmanned aerial vehicle track and scheduling optimization problem of anti-cooperative detection in the unmanned aerial vehicle hidden and inductive integrated network according to the deduced formula. And finally, iteratively solving the problem based on convex approximation and an ellipsoid method to obtain an optimal unmanned aerial vehicle trajectory and scheduling. According to the method provided by the invention, the covert communication requirement in the unmanned aerial vehicle communication perception integrated network can be well met, and the communication safety in the future unmanned aerial vehicle Internet of Things is improved.

The embodiment of the invention relates to the field of information encryption communication, in particular to an information encryption communication method for Internet of Things security and computer equipment. A specific embodiment of the method comprises the following steps: a target mobile terminal generates transmission key request information, and sends information operation request information and the transmission key request information to a target server; the target server generates to-be-stored information and sends the to-be-stored information to the data access control terminal; the data access control terminal responds to the received to-be-stored information, encrypts and stores the to-be-stored information to obtain encrypted storage result information, and sends the encrypted storage result information to the target server; the target server responds to the received encrypted storage result information and sends the encrypted storage result information to the target mobile terminal; and the target mobile terminal sends the encrypted storage result information to the target user terminal. According to the embodiment, the communication security of the Internet of Things is improved.

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.