181 results about "Safety Communications" patented technology

The invention discloses an information acquisition and transmission system of track control equipment, which relates to the technical field of track traffic intelligent monitoring and comprises an intelligent sensing terminal, an edge intelligent analysis node, a safety communication module, a central control platform, a digital twin diagnosis center and a predictive maintenance engine. According to the invention, the intelligent sensing terminal integrates various sensors, adopts a permalloy shielding cavity to isolate external electromagnetic interference, is equipped with a three-stage lightning protection circuit to realize microsecond-stage lightning surge protection, can stably collect parameters of track control equipment in a severe environment, is internally provided with a lightweight LSTM model, carries out preliminary filtering analysis on original data, and is used for monitoring the parameters of the track control equipment. The device operation state can be dynamically identified, the sampling strategy can be adjusted, the basic sampling frequency is maintained in the stable state to reduce power consumption, the sampling frequency is improved by 10 times and the sensor gain is enhanced in the early warning or emergency state, all analysis decisions are completed at the local millisecond level without depending on the cloud, and the real-time performance and accuracy of data processing are effectively improved.

The invention discloses a method for estimating the safety communication rate of a near-earth satellite by using an SDFS cooperating with a GLRT. The method comprises the following steps: constructing a communication system model between the near-earth satellite and a ground terminal; analyzing the signal and channel characteristics, and obtaining the distance between the nodes, the channel gain and the received signal distribution; under the condition that the transmitting power of each monitoring party is unknown, estimating the transmitting power by adopting generalized likelihood ratio test, and independently executing the generalized likelihood ratio test based on the observation data of each monitoring party; the superior manager performs joint judgment based on a soft decision fusion scheme in combination with the generalized likelihood ratio test result of each monitoring party and a joint threshold so as to estimate the detection error probability of the monitoring party; a joint optimization strategy of the transmitting power and the number of continuous transmission time slots is constructed, and the total throughput of the system is maximized under the condition that the cooperative concealment constraint is met; according to the invention, an innovative solution is provided for reliable communication of the near-earth satellite in a complex monitoring environment.

The invention provides a secure communication method and device for an upper computer and an ECU (Electronic Control Unit), a storage medium and a program product, which are respectively applied to an upper computer end and an ECU end, and the method comprises the following steps: the upper computer obtains an encryption public key of the ECU and a decryption private key of the upper computer, generates a session key for data encryption and decryption, and sends the session key to the ECU; and the session key is subjected to double encryption by sequentially using an encryption public key of the ECU and a decryption private key of the ECU, and a communication ciphertext is generated and sent to the ECU end. And after receiving the communication ciphertext, the ECU end performs dual decryption by using the encryption public key of the upper computer and the decryption private key of the ECU end in sequence, so that the session key is recovered. And after the key negotiation is completed, the two parties encrypt and decrypt communication data through a symmetric encryption mode based on the session key. According to the invention, a hybrid encryption communication mechanism taking the public key infrastructure as the root of trust is constructed, confidentiality and integrity protection of communication data is realized, and the authentication capability of the identity of the communication entity is remarkably enhanced.

The invention relates to a hybrid ad hoc network and a safe and efficient communication method in a large-scale wireless sensor network. The method comprises the steps that a network topology construction module is used for designing a heterogeneous communication protocol with high adaptability based on the distribution condition of large-scale sensor nodes, and seamless cooperative work of multiple communication technologies is ensured; the ad-hoc network optimization module adopts a dynamic ad-hoc mechanism to realize autonomous discovery and network connection between nodes and improve the expansibility and flexibility of the network; the safety communication module is combined with an advanced encryption algorithm and an authentication mechanism to ensure the safety and the reliability in a data transmission process; and the efficient communication protocol module improves the data transmission efficiency and the overall performance of the network through the technical means of signal transmission optimization, interference management and the like. Through cooperative work of the modules, efficient, safe and reliable heterogeneous wireless communication can be realized in the large-scale wireless sensor network, and the requirements of the large-scale wireless sensor network in practical application are met.

The invention discloses a multi-unmanned-aerial-vehicle intelligent safety communication method and system based on digital twinning. The method comprises the following steps: constructing a multi-unmanned-aerial-vehicle auxiliary communication system; fitting is carried out through Gaussian process regression, and the optimal value of a kernel function hyper-parameter of the prediction model is determined; based on the optimal value of the kernel function hyper-parameter of the prediction model, performing optimization training through digital twinning driving in combination with a deep reinforcement learning algorithm, and constructing a trained digital twinning environment; the unmanned aerial vehicles are guided to generate differentiated flight paths and data acquisition actions in a physical environment through a fusion-elimination updating method, and intelligent safety communication of the multiple unmanned aerial vehicles is achieved. According to the method, the dynamic change rule of the position of the eavesdropper is modeled, and the multi-unmanned aerial vehicle system is guided to adopt a differentiation strategy according to the dynamic change rule, so that active avoidance and secure data transmission under the threat of mobile eavesdropping are effectively realized. The multi-unmanned aerial vehicle intelligent security communication method and system based on digital twinning can be widely applied to the technical field of unmanned aerial vehicle communication.

The invention discloses an insulin pump safety reminding system based on remote communication, and the system comprises an insulin pump terminal which is used for collecting equipment operation parameters, and receiving and executing a verified operation instruction; the patient monitoring terminal is bridged with a data transfer interface, a local data encryption cache interface, a graded early warning display interface and a remote man-machine interaction interface of the insulin pump terminal and the hospital comprehensive management platform; the graded authorization user terminal receives early warning information related to the insulin pump terminal, checks the state of a patient and initiates a remote operation request; the hospital comprehensive management platform is in communication connection with each terminal, manages each terminal, performs data aggregation and intelligent analysis, generates early warning information based on a multi-dimensional rule, and performs authority management and auditing and multi-source data fusion application; and the safety communication and control module is used for guaranteeing data transmission safety, operation instruction compliance and system emergency fault-tolerant operation. According to the invention, cross-time-space safety protection and active early warning can be realized, the treatment safety and management efficiency are improved, and the method is suitable for medical and pension institutions at all levels.

The invention discloses a remote monitoring and maintenance method and system for a distribution network hot-line work robot, and the method comprises the following steps: carrying out the data collection network deployment of the distribution network hot-line work robot, and carrying out the robot data collection based on the deployed network; carrying out edge calculation on the collected distribution network hot-line work robot data to obtain robot operation key data; establishing a two-way safety communication channel, and transmitting the robot operation key data to a cloud platform through the two-way safety communication channel; the cloud platform performs fault diagnosis on the received data based on a fault diagnosis model of multi-source data fusion, and generates a fault maintenance scheme based on a maintenance strategy model of historical maintenance data; and verifying the feasibility of the fault maintenance scheme to obtain an optimal processing scheme, and sending an instruction of the optimal processing scheme to the distribution network hot-line work robot through the bidirectional safety communication channel for fault maintenance. The fault detection accuracy of the robot can be improved, the maintenance efficiency is improved, and the maintenance cost is reduced.

The invention discloses a multi-unmanned aerial vehicle cooperation-oriented low-altitude Internet of Things secure communication method and system, and belongs to the technical field of low-altitude Internet of Things. The method comprises the following steps: constructing a multi-unmanned aerial vehicle collaborative optimization model integrating a no-fly zone, a ground obstacle zone, communication security and energy consumption constraint; aiming at a high-dimensional non-convex characteristic of the model, a solution algorithm based on a multi-agent depth deterministic strategy gradient framework is adopted, and a local observation space containing a self state, environment information and a channel state and an action space containing speed adjustment and power adjustment are designed for each unmanned aerial vehicle agent through a centralized training decentralized execution mechanism; and a multi-target reward function is defined, so that the intelligent agent autonomously learns a cooperative strategy in a complex environment through training, and an optimized unmanned aerial vehicle track and transmitting power control instruction is jointly output. According to the invention, on the premise of strictly ensuring flight safety and physical layer safety, the sum of long-term safety communication rates of the low-altitude Internet of Things is effectively improved, and the method has good dynamic adaptability and expandability.

The invention discloses a quantum security aggregation signature method suitable for an embedded system, and the method comprises the steps: initializing system parameters through a trusted key generation center, and generating a pair of public and private keys for each signature user; the signature user signs the message by adopting a signature algorithm and a private key of the signature user, and sends a generated signature result, the message and a digital certificate of the message to the aggregation server; the aggregation server executes an aggregation algorithm according to the received information, multiple signatures are combined into an aggregation signature, and the aggregation signature and related information are sent to a verification server; and the verification server verifies the aggregation signature by using system parameters provided by the trusted key generation center and a public key of the aggregation server so as to ensure the integrity and correctness of the signature, thereby verifying the source of the message and the availability of the message. The method is suitable for various embedded systems with numerous edge nodes and limited computing resources, such as application scenes of unmanned aerial vehicle cluster safety communication, medical wireless sensor safety communication, intelligent network connection automobile and even satellite safety communication and the like.

The invention relates to the technical field of wireless communication, in particular to a secure communication perception integrated system optimization method based on rate segmentation multiple access and a reconfigurable holographic surface, which comprises the following steps: constructing a secure communication perception integrated system model; constructing a multi-objective joint optimization problem; a multi-objective joint optimization problem is decomposed into three sub-problems, and solving algorithms are designed respectively; and sequentially updating the solutions of the three sub-problems in an alternate iteration mode until a convergence condition is met, outputting an optimal parameter, and carrying out multi-dimensional verification on the system performance. According to the invention, through a rate segmentation multiple access public stream-private stream layered coding mechanism, the system can intelligently convert part of signal energy into man-made interference to potential eavesdroppers, and at the same time, a high-dimensional beam forming degree of freedom provided by a reconfigurable holographic surface is utilized; accurate orientation of legal user signals and accurate control of null depth of an eavesdropping direction are realized.

The invention relates to the technical field of network security and communication, in particular to a security communication platform and method constructed based on security control and trusted network connection. The security communication platform comprises a security management and control center platform, a trusted password service platform, a trusted network connection optimization architecture, a distributed network architecture, a security shared memory mechanism, an application cluster system and a trusted VPN function module, the security management and control center platform is deployed in a core network, and a trusted platform module is arranged in the security management and control center platform as a global trusted root. By constructing an integrated platform of the trusted security management and control system and the secure and trusted intelligent VPN, triple security assurance of trusted access terminal, trusted network connection and trusted data transmission can be realized, and the requirements of a key information system on high security, high reliability and high adaptation of network communication are met; the defects of the traditional VPN in the aspects of attack surface control, encryption capability, identity authentication, systematic defense and the like are overcome.

The invention provides a programmable electronic detonator safety communication system and a safety communication method, and relates to the technical field of electronic communication safety. The programmable electronic detonator safety communication system comprises a detonation controller and at least one electronic detonator, wherein the electronic detonator is internally provided with a secure communication module, and the secure communication module is configured to generate a unique physical identity label of the electronic detonator based on a physical unclonable function response value generated by the SRAM PUF unit; receiving an encryption instruction frame from the detonation controller for decryption and authentication; sending an encrypted response frame to a detonation controller; the detonation controller is configured to perform bidirectional identity authentication with each electronic detonator and negotiate or derive a session key; constructing a communication frame containing anti-replay parameters and instruction data, encrypting the communication frame by using the session key and generating a message authentication code; and verifying the integrity and freshness of the response frame of the electronic detonator. According to the method, the safety intensity can be ensured, and hardware guarantee is provided for maintaining millisecond-level instruction response.

The invention provides an intelligent terminal secure communication method, system and device based on edge computing, and relates to the technical field of secure communication. The method comprises the following steps: an edge computing node is in communication connection with intelligent terminal equipment through a secure communication module; after communication connection is established between the edge computing node and the intelligent terminal equipment, data encryption transmission is carried out between the edge computing node and the intelligent terminal equipment through an encryption channel; and in a data encryption transmission process between the edge computing node and the intelligent terminal equipment, monitoring an operation state of the edge computing node in real time, and when the operation state of the edge computing node is abnormal, sending a node abnormity early warning prompt to an operation and maintenance personnel terminal. The communication efficiency and safety of the intelligent terminal can be improved, and the requirements of the intelligent terminal for high-speed and high-reliability communication are met.

The invention discloses an Android SoftPOS (Point Of Sale) trusted application method and an Android SoftPOS trusted application system. The method comprises the following steps: an application end initiates an authentication request to an application proof server, and obtains verification data and a plurality of random numbers; carrying out equipment and application integrity verification, generating an integrity proof and a hardware authentication certificate, and submitting the integrity proof and the hardware authentication certificate to a server; after the server passes the verification, signing and issuing a specific safety communication certificate of the equipment to the application end; and the application end establishes a secure communication channel with the server according to the certificate. Through multi-stage verification and a random number mechanism, it is ensured that only trusted equipment and applications can complete authentication, end-to-end secure communication is achieved by combining dynamic certificate signing and issuing, the confidentiality and integrity of payment data are remarkably improved, and the security risk is reduced.

The invention discloses a visible light communication anti-eavesdropping method based on deep reinforcement learning and an optical intelligent reflecting surface, and relates to visible light communication security. Constructing a multi-user safe visible light communication indoor model, and designing a reverse pre-reflection model based on geometrical optical modeling to drive a deep reinforcement learning agent to learn; and accumulating experience by interacting with the environment, sampling and updating the weight of the deep reinforcement learning network by a sampling experience playback pool, and guiding intelligent control on LED beam forming and an optical intelligent reflecting surface. The guide error of the optical intelligent reflecting surface in the environment is perceived by the model at each moment, the secrecy rate of a receiving user is received, the deep reinforcement learning network is combined with the strategy at the previous moment and the environment state to output the strategy at the next moment, and the experience playback pool is circularly updated. And deep reinforcement learning is driven by a reverse pre-reflection model to jointly optimize LED beam forming and optical intelligent reflecting surface guiding, and the optical intelligent reflecting surface is used for accurately controlling a reflection path in a complex dynamic environment, so that the safety communication capability and the resource allocation efficiency are improved.

To provide a method for optimizing STAR-RIS assisted in-vehicle wireless secure communication beamforming.SOLUTION: First, constructing a STAR-RIS assisted multi-in-vehicle user MISO downlink communication system model is considered in a scenario where eavesdropping users exist. Next, for an energy splitting mode of the STAR-RIS, an optimization problem for minimizing the power of a multi-antenna base station in the system is established by simultaneously optimizing the base station's transmission beamforming and STAR-RIS's transmission and reflection coefficient matrices. Finally, the original problem is solved by separating it into two sub-problems using an alternating optimization method. The present invention utilizes STAR-RIS to support physical layer security, improves the communication quality of in-vehicle wireless systems, and can achieve spatial coverage of the entire area and at the same time effectively reduce the total transmission power of the base station.SELECTED DRAWING: Figure 1

The invention discloses an automatic deployment management method, system and device for an autonomous controllable operating system and a medium, and the method comprises the steps: collecting multi-source data, carrying out the preprocessing of the multi-source data, and constructing a safety communication channel based on the preprocessed multi-source data; extracting comprehensive state features of the preprocessed multi-source data, and constructing a joint feature matrix in combination with dynamic key parameters generated by a secure communication channel; calculating the comprehensive weight of each node based on the joint feature matrix, and generating a dynamic weight network topological graph according to the logic connection state of each node; based on the dynamic weight network topological graph, generating a global optimal deployment sequence and calculating dynamic batch parameters, and generating a scheduling strategy in combination with management nodes; and generating an automatic deployment strategy based on the global optimal deployment sequence and the scheduling strategy. According to the invention, the security and adaptability of the deployment process can be improved, collaborative optimization of resource allocation and the network state is realized, and resource competition and communication delay in the deployment process are reduced.

The invention discloses a waveform and unmanned aerial vehicle trajectory design method combining communication and inductance integration with an EKF (Extended Kalman Filter) for realizing secure communication, which is used for carrying out optimization design on the waveform and the unmanned aerial vehicle trajectory of the communication and inductance integration by taking maximization of the achievable rate of uplink communication as a target. According to the method, an optimization problem conforming to a scene is firstly constructed, then an original optimization problem of each time slot is decoupled into sub-problems about a same-inductance integrated waveform and a UAV flight path based on a BCD method, convex approximate fitting is carried out on each non-convex sub-problem, and finally, an iterative algorithm is adopted for solving, so that the algorithm is optimized. And finding a global suboptimal solution of the optimization problem, an optimal sensing integrated waveform and a UAV flight trajectory. The method mainly aims at mobile user and mobile eavesdropper scenes, communication perception integration is combined with extended Kalman filtering, waveform and unmanned aerial vehicle trajectory for design, the quality of wireless communication is ensured while communication safety is achieved, and the method has high innovativeness and uniqueness.

The invention provides a power and environment equipment monitoring system and method for a public network environment, and electronic equipment. The system comprises a data acquisition unit used for acquiring original operation data of at least one power and environment equipment; the protocol conversion unit is used for receiving the original operation data and converting the original operation data into a data packet in a unified standard format based on a preset protocol conversion rule; the secure communication unit is used for receiving the data packet, encrypting and packaging the data packet to obtain an encrypted data packet, and sending the encrypted data packet to the remote monitoring platform through an encryption tunnel; the encryption tunnel is a transmission channel between the safety communication unit and the remote monitoring platform, wherein the transmission channel is constructed through a public network. According to the method, the security communication unit is arranged to encrypt and package the data packet, and the data packet is transmitted on the public network through the encryption tunnel, so that the confidentiality, integrity and availability of the monitoring data in the transmission process are ensured, and the security risk existing in the traditional public network transmission scheme is effectively avoided.

The invention belongs to the technical field of network equipment operation and maintenance, and relates to an operation and maintenance method and system for remote management and data acquisition and analysis based on hybrid networking, and the method comprises the steps: obtaining customer information, and carrying out the preprocessing; deploying and configuring an intelligent gateway to access a client network; configuring an intelligent gateway to enable a client network to establish secure communication connection with the monitoring center through the intelligent gateway; the monitoring center inputs customer asset information in a grading manner based on the preprocessed customer information; the intelligent gateway collects state information of customer assets in a customer network according to a preset collection period and transmits the state information to the monitoring center, and the monitoring center updates the states of the customer assets based on the received state information and performs operation and maintenance based on the current states of the customer assets. The security communication between the monitoring center and the user network is realized by deploying the intelligent gateway; state information of client network equipment is collected based on an intelligent gateway to serve as an information safety buffer area of a client network and a monitoring center, and safety communication in different scenes is achieved.

The application discloses a kind of multi-user downlink MISO system energy-saving safety communication method, belong to wireless communication and signal processing technical field, system includes: base station (access point, AP), with M Antenna is configured to generate and send beamforming signal;While transmitting and reflecting reconfigurable intelligent surface, contain N Adjustable electromagnetic unit, each unit simultaneously supports reflection and transmission mode, and the amplitude coefficient of reflection and transmission satisfies the energy conservation constraint, and the phase coefficient can be independently controlled;Legal user terminal is distributed in the reflection area and transmission area of STAR-RIS;Eavesdropper terminal is distributed in the reflection and transmission area of STAR-RIS;The application limits the QoS of eavesdropper terminal while guaranteeing the communication quality (Quality of Service, QoS) of legal user terminal, and saves the transmission power required by base station AP as far as possible.

The invention relates to a mining personnel positioning and emergency broadcasting method, and belongs to the field of underground coal mine positioning communication. In order to solve the problems of high cost and slow response caused by discrete deployment of a traditional positioning and broadcasting system, the invention provides a technical scheme of fusing dual systems: an industrial Ethernet is connected with an upper computer, a card reader and an identification card, and the upper computer is integrated with a positioning and broadcasting control module; the card reader is internally provided with a dormant state frequency modulation transmitter, receives an instruction to activate and converts voice data into a frequency modulation signal in an emergency; and a power-off frequency modulation receiver is arranged in the identification card and is started and broadcasted after receiving the instruction. According to the invention, the device reuse rate is 70%, the deployment cost is reduced by 50%, the positioning precision reaches 0.3 m, the broadcast end-to-end delay is less than 200 milliseconds, and the underground safety communication efficiency is effectively improved.

The application discloses an integrated control system, which comprises a conventional control system and a safety protection system arranged on a local rack and N remote IO racks. The conventional control system is connected with an upper computer and comprises a conventional logic control unit, a first conventional communication interface module connected with the conventional logic control unit, N second conventional communication interface modules connected with the first conventional communication interface module, and N conventional IO modules connected with the second conventional communication interface modules; the safety protection system comprises a safety logic control unit connected with the conventional logic control unit, a first safety communication interface module connected with the safety logic control unit, N second safety communication interface modules connected with the first safety communication interface module, and N safety IO modules connected with the second safety communication interface modules. The scheme provides an integrated design scheme of the conventional control system and the safety protection system, so that the overall design cost of the integrated control system is reduced.

The invention provides an automobile external equipment access authentication method and system, equipment and a medium, and belongs to the technical field of automobile safety communication, and the method comprises the steps: obtaining a second identity authentication message sent by a T-BOX; if the T-BOX self-increasing serial number is greater than or equal to the gateway self-increasing serial number, the first-level authentication succeeds, otherwise, the first-level authentication fails; when the first-level authentication is successful, judging whether the T-BOX unique identity identifier and the identity information of the remote vehicle control instruction APP terminal in the first identity authentication message are consistent with the T-BOX unique identity identifier and the identity information of the remote vehicle control instruction APP terminal stored in the gateway, if so, determining that the second-level authentication is successful, and otherwise, determining that the second-level authentication fails; and when the second-level authentication succeeds, calculating the first identity authentication message and the T-BOX self-increasing serial number in the received second identity authentication message through a preset message authentication code algorithm to generate a second message authentication code, comparing the second message authentication code with the first message authentication code in the second identity authentication message, if the second message authentication code is consistent with the first message authentication code in the second identity authentication message, determining that the third-level authentication succeeds, otherwise, determining that the third-level authentication fails.

Provided are a safety IO terminal capable of performing safety control based on data from a plurality of safety controllers, and a safety system including the safety IO terminal. The safety IO terminal comprises: a safety output circuit that outputs a safety output signal; a safety communication unit capable of establishing a safety connection with one or more safety controllers; a received data storage unit that includes a plurality of individual areas for storing, for each safety connection, data received by the safety communication unit; and a safety logic executing unit that uses arbitrary data stored in the plurality of individual areas to determine a value for the safety output signal. Each of the plurality of individual areas is configured to associate identification information for identifying a safety controller that establishes a safety connection with the safety IO terminal.

The invention discloses a robot safety communication method and device and a storage medium. The method comprises the following steps: acquiring an equipment identity credential from a hardware security environment of a robot, and establishing a security channel with a cloud service based on the equipment identity credential; obtaining an access token with a validity period from the cloud service through the secure channel; under the condition that the secure channel receives the control instruction from the cloud service, the control instruction is set in a temporary storage state; an execution authorization request for the control instruction is initiated to the cloud service, and the execution authorization request carries the access token; receiving a response to the execution authorization request from the cloud service; and under the condition that the response is authorization, the control instruction in the temporary storage state is sent to an execution mechanism of the robot to be executed.

The invention discloses a distributed secure communication protocol data synchronization method and system, and relates to the technical field of data processing, and the method comprises the steps: obtaining the header information of an initial data packet; according to the header information, classifying the initial data packet to obtain a target data packet; resource isolation processing is carried out on the data processing environment, a high-priority processing environment and a low-priority processing environment are obtained, and the high-priority processing environment and the low-priority processing environment both have independent computing resources; and performing data synchronization processing on the target data packet according to the high-priority processing environment and the low-priority processing environment. According to the method and the device, the high-priority processing environment and the low-priority processing environment can be combined to respectively process the data packets with different priorities so as to realize data synchronous processing, and the efficiency and the data security are improved.

The application discloses a power satellite-ground fusion optimal power safety communication method, device and system, and relates to the technical field of power system communication safety. The method comprises the following steps: collecting required data; in the satellite beam coverage range of power satellite-ground communication, quantifying the threat degree of eavesdroppers based on the collected data to obtain a threat value; performing power splitting operation based on the threat value and the collected data to obtain a power allocation result, and then selecting a corresponding safety algorithm scheme in combination with the threshold range where the threat value is located, power business time delay and computing power demand power; constructing and solving a power satellite-ground fusion optimal power allocation model to obtain a power satellite-ground fusion optimal power allocation result applicable under all safety algorithm schemes. The application can realize accurate balanced control of power business safety and transmission performance under the condition of limited satellite power through multi-eavesdropper threat quantification, safety algorithm dynamic adaptation and satellite-ground power optimization.

The invention provides an intelligent auxiliary security communication method, system and device, and relates to the technical field of communication. The method is applied to a wireless communication system, and a hybrid reconfigurable intelligent surface is deployed in the wireless communication system. Based on structure information and a communication scene of the hybrid reconfigurable intelligent surface, a joint optimization problem of the wireless communication system is constructed by taking maximization of a system secrecy rate of the wireless communication system as a target, a base station beam forming vector and a hybrid reconfigurable intelligent surface coefficient matrix are coupled, and a target function and a unit mode length constraint are non-convex. The communication scene comprises a user, an eavesdropping object and an interference source. An alternative optimization framework is adopted, a joint optimization problem is decoupled into two sub-problems for iterative solution, and a hybrid reconfigurable intelligent surface coefficient capable of dynamically adjusting a signal propagation path and a base station beam forming vector corresponding to a wireless communication system are obtained; the two sub-problems include a base station beam forming sub-problem and a hybrid reconfigurable intelligent surface coefficient sub-problem. According to the invention, the communication security can be ensured.

The invention discloses a SecOC vehicle-mounted safety communication method based on dynamic key management enhancement, which realizes on-demand distribution, dynamic updating and full life cycle management of SecOC keys by introducing a key distribution center. The ECU negotiates a unique preset key through the KDC client and the KDC server; the KDC client requests a service bill from the KDC server based on the service identifier of the application; the SecOC key is dynamically distributed by the KDC, and automatic rotation based on a time strategy and emergency update based on a security event are supported. The SecOC message adopts a gPTP timestamp as a freshness value, and after the data unit and the freshness value are spliced, a message authentication code is calculated. According to the invention, the secret key is not statically preset any more, but is dynamically distributed by the KDC and supports online updating, and through combination of bidirectional certificate authentication and timestamp double-factor authentication, full-life-cycle safety management of the vehicle service secret key is realized, and the risk of secret key leakage is effectively coped with.