156 results about "Eavesdropping" patented technology

The present technology pertains to systems and methods for one-way authentication of quantum channels. A transmitter generates an entangled quantum state comprising a first state and a second state, modulates the second state according to a clock-synchronized pattern, and transmits it through a quantum channel to a receiver. The first state is retained and measured at the transmitter to extract quantum-state information. Authentication is performed based on this information, without requiring feedback from the receiver. The quantum-state information may be derived using quadrature measurements, Gaussian tomography, or other statistical analyses to detect whether the second state underwent irreversible interactions such as eavesdropping or decoherence. The system enables secure unidirectional quantum authentication, reduces protocol complexity, and supports real-time anomaly detection. It is compatible with continuous-variable quantum states, quantum key distribution (QKD), and scalable communication architectures.

The invention provides a method for assisting a movable antenna to realize secure communication by STAR-RIS, and relates to the technical field of wireless communication. According to the method, the safety and the rate of the system are maximized by jointly optimizing the beam forming of the base station, the position of the movable antenna and the STAR-RIS coefficient matrix. The method specifically comprises the following steps: constructing a downlink MIMO system and establishing a joint optimization problem; decomposing the joint optimization problem into three sub-problems by adopting an alternate optimization framework; respectively utilizing a particle swarm optimization algorithm and a weighted minimum mean square error method to be combined with a Majoritization-Minimalization algorithm to solve each sub-problem, and respectively utilizing the particle swarm optimization algorithm and the weighted minimum mean square error method to be combined with the Majoritization-Minimalization algorithm to solve each sub-problem; and alternately executing related steps until system security and rate convergence to obtain a solution of the joint optimization problem. By the adoption of the method, the safety communication performance of the system is remarkably improved, full-space coverage and precise beam regulation are achieved, the algorithm convergence is high, the solving efficiency is high, and the method is suitable for a downlink system with multiple users and multiple eavesdropping nodes.

The invention discloses an electric power production management system security situation awareness method based on a cryptographic algorithm. According to the invention, by deeply fusing SM2, SM3, SM4 and other national cryptographic algorithms and power system characteristics, a full-link autonomous and controllable security protection system is constructed. In a data acquisition stage, SM4 encryption transmission and SM3 hash evidence storage are adopted to ensure confidentiality and integrity of data from a source to processing, and eavesdropping and tampering risks in a transmission process are effectively resisted; in a core situation assessment link, point multiplication operation of SM2 elliptic curve cryptography is innovatively introduced into a node aggregation process of a graph neural network, and graph structure mapping of physical topology of a power system is combined, so that the model can accurately capture implicit association and cascade influence between equipment, and the situation assessment accuracy is improved. At the same time, the recognition capability of the hidden attack mode is enhanced by using the nonlinear transformation of SM4, and the perception depth and anti-attack toughness of the system to the complex threats in the power production scene are improved from the bottom layer of the algorithm.

The invention provides an anti-eavesdropping system and an anti-eavesdropping method for eavesdropping according to a substance vibration principle. The system comprises an anti-eavesdropping intelligent host which is arranged indoors and comprises a pickup module and a signal processing module; the pickup module is used for picking up a sound signal of an indoor target sound source; the signal processing module is connected with the pickup module and is used for processing the sound signal to generate an interference signal; and the at least one interference generator is arranged on a solid isolator for isolating the indoor space from the outdoor space, is connected with the anti-eavesdropping intelligent host, and is used for converting the interference signal into a mechanical vibration signal so as to interfere an eavesdropping device through the mechanical vibration signal. According to the environment medium vibration principle, anti-eavesdropping is effectively achieved through reverse interference of the mechanical vibration signals on the eavesdropping device, and the anti-eavesdropping device has the advantages of being independent of sites, rapid in deployment and low in cost.

The embodiment of the invention relates to the field of unmanned aerial vehicles, and provides a dynamic game-based air-ground wireless system security deployment and transmission scheme generation method and device and a storage medium, and the method comprises the steps: obtaining an initial model parameter and an event occurrence sequence, and taking a reverse sequence of the event occurrence sequence as a model construction sequence; determining that a planner takes expectation maximization of a weighted value of the transmission cost and the secrecy rate as a planning target, and determining that an eavesdropper takes eavesdropping rate maximization as an eavesdropping target; according to a model construction sequence, a planning target and an eavesdropping target are taken as model construction targets, and a three-stage dynamic game model is constructed according to the initial model parameters; and solving the three-stage dynamic game model based on a two-stage optimization algorithm, and generating a security deployment and transmission scheme of the air-ground wireless system according to target model parameters. By adopting the method, the security of unmanned aerial vehicle data transmission after deployment can be improved, the deployment efficiency is improved, and the deployment effect is improved.

The invention relates to the technical field of wireless communication, in particular to a public network interphone with a quantum chip. According to the interphone, a master control module and a quantum security chip work cooperatively, a quantum random number generator is used for dynamically deriving a session key, and offline security distribution of a group master key is realized by encrypting a two-dimensional code; in a communication process, a system adaptively switches a voice coding mode according to a network condition, end-to-end authentication encryption is carried out on voice data by using a hardware encryption engine, and low-delay transmission is guaranteed through a network priority mark; the device establishes a complete key life cycle management mechanism, supports regular update and forward security of session keys and instant update and backward security of a group master key when members change, and ensures that all key operations are completed in a quantum chip. According to the invention, various eavesdropping and tampering attacks are effectively resisted, and safe, real-time and clear high-confidentiality voice communication in a public network environment is realized.

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 belongs to the technical field of security and secrecy, and particularly relates to a vehicle secrecy technology detection method and system based on a shielding tent. Constructing a signal isolation environment in the electromagnetic shielding tent; establishing a noise baseline model through spectral analysis; wireless terminal equipment detection is carried out through an all-standard terminal analyzer; a non-linear node detector, an infrared thermal imager, a near-field signal detector, a back scattering type X-ray machine and an endoscope are used for cooperatively scanning in different regions; and by combining algorithms such as big data and machine learning, positioning an overproof signal source, and if a suspicious device is found, disposing according to rules and obtaining evidence. According to the method, the problems of low standardization degree, high equipment false alarm rate, low implementation efficiency and low detection comprehensiveness when the vehicle is subjected to confidentiality technology detection in an open environment are solved. The method is suitable for eavesdropping, stealing and positioning device detection of secret-related vehicles.

The invention discloses a dynamic beam hopping and resource allocation method for NGSO satellite security communication, and belongs to the field of sixth-generation mobile communication security communication and wireless resource allocation. According to the method, significant non-uniformity of distribution of ground flow requirements in a time domain and a space domain is considered, and a satellite-ground security communication network dynamic beam hopping and resource allocation problem model is constructed by considering ground user flow requirements and composition elements and channel characteristics of an NGSO multi-beam satellite network. Through joint optimization of satellite hopping beam scheduling, power resource allocation and auxiliary interference unmanned aerial vehicle deployment strategies, service requirements of different users and ground eavesdropping environments are dynamically adapted, and the safety throughput and queue delay fairness of the system are improved. According to the method, mixed integer linear programming modeling is adopted, and a low-complexity approximation algorithm is combined, so that the method not only has optimality guarantee, but also can be deployed and operated in an actual satellite communication system, and thus unification of secure communication and efficient resource scheduling is realized.

The invention relates to the technical field of quantum security computing communication, and discloses a cluster state-based third-party quantum summation method with a bidirectional identity authentication mechanism, which comprises the following steps of: firstly, realizing bidirectional identity authentication between a participant and a third party in a quantum channel by pre-sharing secret identity information and a hash function in combination with a decoy photon technology; and impersonation and man-in-the-middle attack are fundamentally eradicated. And after the authentication is passed, the participant randomly executes measurement or reflection operation on the particle to which the participant belongs, so that an encrypted private key can be generated under the assistance of a third party, and external eavesdropping and internal participant attack can be jointly detected according to an operation combination to form multi-level security protection. Finally, the third party can only calculate the bitwise modular binary sum of the private bit string of each party, and cannot obtain any single input value. According to the method, authentication and calculation are organically fused, unconditional security is guaranteed, and meanwhile, the quantum capability requirements of participants are remarkably reduced.

The invention discloses an implementation method of a sub-connection active STAR-RIS assisted secure communication system. A base station, a sub-connection active STAR-RIS, a legal user and an eavesdropping user are included. According to the invention, M units of STAR-RIS are grouped into L sub-arrays, and an amplifier is shared to reduce power consumption and cost; with maximization of system secrecy energy efficiency as a target, base station beam forming, STAR-RIS reflection / transmission coefficients and amplifier amplification coefficients are jointly optimized; and solving the non-convex optimization problem by adopting an efficient algorithm based on block coordinate descent. According to the invention, the hardware overhead and the system power consumption are effectively reduced through the sub-connection structure, meanwhile, the secure transmission efficiency of the system is remarkably improved through joint optimization, multiplicative fading is overcome, and an efficient and reliable solution can be provided for 6G secure communication.

The invention discloses a self-adaptive anti-monitoring communication system, and relates to the technical field of communication security. The system comprises a multi-dimensional fusion sensing module, a dynamic adaptation engine, an encryption communication subsystem and a verification feedback module. The innovation points are that the monitoring situation is accurately researched and judged through multi-source information fusion, a communication parameter and an encryption strategy are dynamically matched based on a research and judgment result, a transmission mechanism combining improved adaptive frequency hopping and dynamic network coding is adopted, and meanwhile, a key dynamic updating and identity bidirectional verification system is constructed. The problems that in the prior art, self-adaptive adjustment is poor in pertinence, encryption and transmission efficiency is unbalanced, and anti-monitoring scene adaptation is single are solved, collaborative optimization of monitoring risk perception, dynamic defense and communication quality is achieved, and the safety and reliability of communication in the complex electromagnetic environment are improved.

The invention relates to a BD-RIS-based auxiliary satellite RSMA system safety performance improvement method. The method comprises the following steps of: decomposing information to be transmitted into a public stream and a private stream by using an RSMA technology according to a cascade channel coefficient from a satellite to a legal user and an illegal node, and calculating a receiving signal-to-noise ratio of the two parties so as to obtain a public stream communication rate and a private stream communication rate of the legal user and an eavesdropping rate of an eavesdropper. And constructing a target function according to the rates, and establishing a BD-RIS reflection coefficient and satellite emission beamforming vector optimization model in combination with a preset loss function. And solving by adopting a double-circulation PDD algorithm, splitting the problem through a BCD method, processing non-convexity through SCA, firstly relaxing symmetric unitary constraint of a reflection coefficient matrix, and then projecting to obtain an optimized vector and matrix. By adopting the method to calculate the system security transmission rate, the security performance is enhanced.

The invention discloses a multi-user single-eavesdropper resource management and optimization method based on a Stackelberg game, and in a network scene with eavesdropping equipment, although each user can improve the data transmission rate by improving the respective transmitting power, the data eavesdropping rate of the eavesdropping equipment is also increased at the same time. How to carry out modeling of effective resource allocation for data sending power of users is a key problem to be solved in the invention. Based on the above problem, the invention provides a multi-user single-eavesdropper resource management and optimization method based on the Stackelberg game, the multi-user power distribution and eavesdropper eavesdropping rate limitation problem jointly form a game model, and Taylor expansion is adopted to convert the original non-convex optimization problem into a convex optimization problem for modeling.

The application discloses a kind of based on multi-scale control technology's unmanned system cooperation privacy protection method, belong to unmanned system safety cooperation control field.This method solves the ill-conditioned numerical problem in the cooperative control of unmanned system with fast-slow coupling characteristics, and the state privacy leakage problem caused by communication eavesdropping.Scheme includes: establishing system dynamic model;Design the differential privacy leader-following multi-scale cooperative controller containing attenuation noise;Obtain the standard singular perturbation form of error system through matrix transformation;Based on multi-scale control theory, solve the state control gain that guarantees mean square consistency;Determine the noise control gain and privacy parameter in combination with probability theory and matrix spectral theory.The present application avoids the ill-conditioned numerical problem, and the controller is robust, while achieving accurate cooperative control, provides verifiable differential privacy protection for the initial state of the system, significantly improves the safety and reliability of unmanned system in the hostile environment.

The application discloses an RIS-assisted zero-forcing beamforming method based on a physical layer security technology, and the method comprises the following steps: constructing an RIS-assisted downlink MISO security transmission system model, constructing a passive eavesdropping user mathematical model based on random geometry, and constructing a legal user and eavesdropping user received signal-to-noise ratio expression; constructing a legal user received signal-to-noise ratio maximization optimization problem model, including determining optimization variables, an objective function and constraint conditions, and pre-designing a transmission beamforming vector based on a zero-forcing algorithm; constructing a joint optimization transmission beamforming and reflection beamforming vector algorithm, dividing the legal user received signal-to-noise ratio maximization optimization problem into two sub-problems for solving, and optimizing the reflection beamforming vector at the RIS and the transmission beamforming vector at the base station. The application jointly optimizes the transmission beamforming vector and the reflection beamforming vector, and realizes the optimization target of legal user received signal-to-noise ratio maximization.

The application discloses a kind of unmanned aerial vehicle inspection data security transmission method and system based on 4G private deployment.The method comprises: deploying 4G non-public network containing communication perception integrated base station, and identifying illegal eavesdropping channel by active eavesdropping perception module;Task unmanned aerial vehicle and the physical layer protection system of collaborative protection unmanned aerial vehicle are constructed, and task unmanned aerial vehicle transmits integrated beam back data and locates eavesdropper, and protection unmanned aerial vehicle directional transmission interference signal;End-to-end encryption and identity authentication are executed on the basis of physical layer protection, and form double security mechanism;With the security transmission rate under unit energy consumption as optimization goal, establish joint optimization model;The model is decomposed into two coupled sub-problems and solved alternately, and after iterative convergence, according to optimal parameter, security transmission is executed.The application reduces system energy consumption while ensuring the security transmission of inspection data by double protection of physical layer and cryptographic layer, double unmanned aerial vehicle cooperation and security energy efficiency joint optimization.

The application discloses a kind of parallel machine detection method and system for pcm telephone system, it is related to communication security technical field, comprising the following steps: S1, when telephone is first opened, collect the reference pressure difference between A-B line in hands-free state and off-hook state, and the reference pressure difference is stored as health profile data, constructs health profile;S2, actual pressure difference between A-B line is continuously detected in the process of talking, sampling frequency cannot be lower than 1 time per second, and real-time dynamic monitoring is carried out to pressure difference value.The parallel machine detection method and system for pcm telephone system proposed in the application, by constructing health profile when telephone is first opened, accurate reference is provided for subsequent detection, effectively distinguishes normal communication state and illegal parallel machine eavesdropping behavior, in the process of talking, system real-time dynamic monitoring pressure difference between A-B line, in combination with line abnormality detection, can accurately identify and shield the misjudgment caused by fault, improve the reliability of detection.

The invention discloses an MASs consistency logic security control method under hybrid attacks, and relates to the technical field of multi-agent system security control, the method comprises the following steps: firstly initializing MASs system parameters, and realizing data confidentiality protection and information tampering detection by an LSPM through a two-layer key mechanism of symmetric key encryption and asymmetric key signature; designing a segmented consistency controller for a mixed scene of eavesdropping, information tampering containing content and identity source tampering and DoS attack, and deriving a linear matrix inequality LMIs through a time-varying Lyapunov function LKFs to solve controller parameters; and finally, continuously executing data security transmission and state adjustment to ensure that the MASs realizes leader-follower LF consistency. According to the method, when the MASs face mixed network attacks such as eavesdropping, tampering and denial of service, a comprehensive guarantee with confidentiality, integrity and authenticity is provided, and the reliability that the system finally realizes a consistent control target is ensured.

The application relates to an intelligent metasurface security transmission optimization method based on a supervised deep neural network. The method comprises the following steps: acquiring a signal of a transmitting integrated RIS, modeling an RIS-to-legal user channel, combining the signal and the channel, and calculating a legal user received signal-to-interference-and-noise ratio and an achievable rate; meanwhile, corresponding indexes at an eavesdropper and an achievable rate of an eavesdropping link are calculated. Then, a multicast system security capacity is designed according to a minimum value of the achievable rate of the legal user and the achievable rate of the eavesdropping link. In order to achieve the target, an optimization model is constructed by combining the achievable rate of the legal user, RIS power and a perceived signal-to-noise ratio constraint. A supervised deep neural network and a training set are constructed, an offline training, online inference and parameter updating are carried out by using an Adam optimizer according to a preset loss function, and a trained network is obtained. Finally, the optimization model is solved by using the network, and RIS phase shift and power allocation coefficients are acquired. The method can reduce the calculation complexity and improve the real-time performance.

The application discloses a key default security information exchange method, system, device and medium based on physical layer network coding and block chain in Internet of Vehicles, and the method comprises the following steps: constructing a block chain network; registering an on-board unit (OBU); initiating a data exchange request; authenticating the OBU; and exchanging data. The system, device and medium are used for realizing the key default security information exchange method based on physical layer network coding and block chain in Internet of Vehicles. The block chain technology is applied to identity authentication of Internet of Vehicles, and the data exchange between OBUs is carried out by using physical layer network coding, so that the security and confidentiality are high, and the eavesdropping attack and privacy leakage can be prevented at the same time.

The invention relates to the technical field of wireless communication and perception fusion, and provides a design method of a novel secure transceiver, which comprises the following steps: step 1, in a semantic transmitter of an ISAC base station, extracting semantic information of source data through a semantic encoder SE, and processing the semantic information through a joint source channel encoder JSCE to generate a semantic transmitting signal z; 2, judging whether an eavesdropping threat exists in the system or not, and if not, executing the step 3; if yes, executing the step 4; step 3, transmitting the semantic emission signal z to an ISAC base station and a semantic receiver of downlink user equipment UE through an SAC channel, and respectively completing a general sensing task; and step 4, installing a pluggable data encryption module behind the semantic transmitter of the ISAC base station. By constructing the security awareness semantic drive ISAC system, hardware does not need to be transformed to improve compatibility, training data and time are reduced, interruption is avoided, while the accuracy of an eavesdropper is reduced, the communication performance and signal recovery precision of a legal end are guaranteed, and the method is suitable for scenes such as the Internet of Vehicles.

The invention belongs to the technical field of communication security, and particularly relates to a multi-agent SAC beam forming optimization method and system for security communication. Comprising the steps of constructing a communication system model; considering that the malicious node has two intelligent behavior modes of sleep and eavesdropping, constructing an attack model; deriving a key generation rate and a data transmission rate, and generating a joint optimization problem of the key generation rate and the data transmission rate; a friendly node is set, channel information provided by the friendly node is utilized, and a malicious node eavesdropping channel and behavior are predicted through LSTM; a multi-agent SAC algorithm is introduced, eavesdropping channels and behaviors of malicious nodes predicted by LSTM are integrated, beam forming vectors in the joint optimization problem are cooperatively optimized, and an optimal beam forming strategy is obtained. According to the method, a unified beam forming optimization framework is constructed, dynamic evaluation and suppression of eavesdropping risks are realized under the condition of partial observable channels, and the joint security of two legal communication parties in key generation and data transmission is improved.

Methods, systems, and devices for wireless communications are described. A first wireless device may receive, from a second wireless device, an indication of one or more parameters associated with a reference signal that is to be transmitted by the first wireless device. The one or more parameters may be encoded separately from the remainder of the control message using a secret key that is known to both the second wireless device and the first wireless device. The first wireless device may then decode the one or more parameters using the secret key, and may transmit the associated reference signal to the second wireless device based on decoding the parameters using the secret key.

1. Name of the designed product: privacy shield (type I). 2. Use of the designed product: for preventing eavesdropping of mobile phone. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The invention relates to communication security, in particular to a security communication system and method based on a quantum SIM (Subscriber Identity Module) card, and a terminal layer, which are used for generating a quantum random number as a key entropy source, performing identity authentication, encrypting and decrypting data and monitoring eavesdropping behaviors; the network layer is used for realizing key relaying, carrying out protocol conversion and achieving cross-network interconnection; the platform layer is used for performing identity authentication, generating a secret key and implementing security monitoring; according to the technical scheme provided by the invention, the defects that the user identity information is easy to leak, the secret key is easy to crack and an active eavesdropping detection mechanism is lacked in the prior art can be effectively overcome.

The application relates to a direction modulation-based covert secure transmission method and a communication base station, and belongs to the technical field of wireless communication. In view of the case that channel state information is non-ideal and distortion noise exists, a robust direction modulation technology is adopted, a continuous convex approximation algorithm is used to optimize and select a transmitting end, a combination with low secrecy capacity is eliminated, the secrecy capacity is improved, the possibility of eavesdropping by a eavesdropping user is reduced to a certain extent, and physical layer secure communication is further ensured.

The invention relates to a novel quantum secret sharing method based on a Bell state. The method comprises the following steps that: firstly, a secret distributor sends a sequence of mixed Bell states and decoy particles to participants; secondly, the participants encode secret shares of the participants into corresponding Pauli operators, and the Pauli operators are applied to the received particle sequences; and finally, the participants recover the shared secret information through cooperation. And shared secret information can be obtained by executing Bell-based measurement by a secret distributor. Compared with other quantum secret sharing methods, the method has the advantages that the secret distributor does not grasp the secret share of the participant, even if the secret distributor grasp the shared secret information, the secret share of the participant cannot be deduced, and the privacy and benefits of the participant can be effectively protected. On the basis of meeting safety, a Bell state is used as a quantum carrier, and compared with an entangled state of n particles, the Bell state is easier to prepare; and meanwhile, various eavesdropping attacks can be effectively resisted. Compared with a traditional method, the method is more practical and higher in efficiency.

The invention discloses an industrial control front-end and back-end cross-language platform encryption communication method and system based on national secret, and belongs to the technical field of energy equipment industrial control network security, and the method comprises the steps: a server generates a self-defined combination containing a factory equipment type, a timestamp and an equipment serial number identifier; sending the user-defined combination to a trusted execution environment (TEE) through a TCP / IP (Transmission Control Protocol / Internet Protocol); the TEE verifies the legality of the combination, if the verification is passed, a pair of SM2 private key and public key is generated, and the SM2 public key is returned to the server; the server negotiates an SM4 key with the client through a cross-language key interoperation mechanism based on the SM2 public key; and the two parties use the SM4 key to carry out encryption communication on the industrial control instruction and data. Secure communication of a cross-language platform in a domestic industrial control system can be realized, eavesdropping and tampering are prevented, and intrinsic safety of energy equipment is realized.

The invention discloses a vehicle task unloading method for known potential eavesdropping vehicle CSI, and belongs to the technical field of communication. In order to solve the problem that sensitive information of a task vehicle may be leaked due to potential eavesdropping behaviors of surrounding vehicles in a scene in which channel state information (CSI) in a system is known, the invention provides a vehicle task unloading method for a known potential eavesdropping vehicle (CSI). According to the method, an artificial noise-assisted adaptive eavesdropping coding technology is adopted, the artificial noise power and the transmitting direction of a base station and the transmitting power of a task vehicle are dynamically adjusted according to the real-time position of a vehicle in a system, wireless channel state information (CSI) and task time delay constraint, and the signal-to-noise ratio of a potential eavesdropping vehicle channel is deteriorated, so that the real-time position of the vehicle is determined. The capacity of an eavesdropping channel is reduced, and the system energy consumption required by task unloading is minimized on the basis of ensuring safe task unloading by increasing the legal channel capacity of a task vehicle and improving the secrecy rate.