330 results about "Eavesdropping" patented technology

The invention relates to the technical field of network security, in particular to a cloud data secure transmission system and method based on a quantum encryption technology. Comprising a quantum key generation and management unit used for generating a physical layer security key, realizing key true random generation through a quantum state unclonable principle, and optimizing key negotiation efficiency by adopting an improved adaptive basis vector matching algorithm; a data transmission encryption unit; a physical layer safety monitoring unit; and a channel fusion switching unit. According to the method, the physical layer security key is generated based on the quantum state unclonable principle, the dependency limitation of a traditional encryption algorithm on mathematics is broken through, and the cracking risk of quantum computing on bottom layer encryption logic can be reduced; according to the invention, photon polarization state parameters are collected in real time through the physical layer security monitoring unit, the eavesdropping behavior is detected based on the preset error rate threshold, real-time perception of the eavesdropping behavior in a transmission link is realized, and the defect that the security state of the physical layer cannot be perceived in real time in a traditional scheme is overcome.

Systems and methods for performing ZTNA secure traffic forwarding are provided. In one example, as part of setting up a TFAP tunnel, between a target service and an endpoint security agent of an endpoint device through which an application running on the endpoint device can interact with the target service, a secure connection is established between the endpoint security agent and a ZTNA AP. Based on an encryption status of traffic transmitted from the application to the target service: (i) protection against eavesdropping by an MITM attacker is provided by using the secure connection to encrypt one or more critical messages of the traffic between the endpoint security agent and the ZTNA AP; and (ii) the endpoint security agent abstains from switching to bypassing mode through the TFAP tunnel until after the one or more critical messages of the traffic have been exchanged.

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 relates to the field of hardware encryption, and discloses a geological disaster monitoring scene-based low-power-consumption hardware encryption system, which comprises a layered architecture module for constructing a terminal sensing layer and a cloud platform layer, generating a three-dimensional risk thermodynamic diagram, and carrying out short-term early warning model and emergency deduction; the encryption and decryption module is used for carrying out multi-dimensional identity verification based on protocol layering and national secret algorithm fusion, carrying out dynamic management and eavesdropping monitoring on a secret key, optimizing a data processing flow, and establishing a secure channel to dynamically negotiate whether encryption or decryption is needed; the key management module is used for implementing a triple binding mechanism, carrying out processing and risk assessment on the monitoring data, and carrying out key backup and recovery by adopting a dynamic key period according to a generated risk level; and the safety protection module is used for performing intelligent management on the power consumption of the system based on the active state of the system, selecting a compression strategy according to the data type by adopting a dynamic compression algorithm, performing safety monitoring on hardware and firmware, performing intrusion monitoring on the system and performing automatic repair.

The invention discloses an interference-assisted resource optimization method for an asynchronous federated learning system, and the method comprises the steps: constructing a dynamic model, about time delay and energy consumption, of the asynchronous federated learning system in a first arrival first arrival mode; a two-step algorithm which is deployed on a base station carrying an edge server and combines a depth deterministic strategy gradient and a Transformer network is utilized to make a resource allocation decision comprising an uplink and downlink terminal equipment scheduling strategy and CPU frequency, sending power and interference power of terminal equipment aiming at state information collected in a current environment during each global model aggregation; and the eavesdropping attack is resisted by enabling the downlink data transmission rate to be greater than a given secrecy rate by using an interference-assisted technology. Aiming at a first arrival first arrival mode, namely an asynchronous federated learning process that a local model of a first arrival server is selected to participate in aggregation, dynamic modeling about time delay and energy consumption in an actual wireless communication scene is analyzed, and a two-step resource allocation strategy and an interference assistance technology based on DDPG are adopted; and the time delay and the energy consumption required by asynchronous federated learning are minimized on the basis of ensuring the security of a physical layer.

A method, computer system, and computer program product are provided for performing automated eavesdropping detection and remediation. A distance between a first and second wireless client device is determined with reference to a wireless access point based on wireless signals transmitted by the devices. A first and second signal loss are determined with reference to the first and second wireless client devices and the wireless access point. Material properties for any physical structures between the first and second wireless client devices are derived based on the signal losses. A sound attenuation is determined between the first and second wireless client devices based on the material properties. It is determined whether a first user of the first wireless client device can hear audio of a second user of the second wireless client device based on the sound attenuation determined between the first wireless client device and the second wireless client device.

The invention discloses a radio frequency fingerprint identification method and system based on a double-path cross attention fusion network, and is suitable for an application scene under a low signal-to-noise ratio condition. In an Internet of Things system, prevention of security threats such as illegal monitoring, data tampering and equipment pretending is a basis for guaranteeing user communication security. The radio frequency fingerprint identification technology based on physical layer feature authentication is generated at the right time, has the characteristics of passive authentication, no need of a secret key and the like, and is widely used for enhancing the identity authentication capability of a wireless network. However, in the prior art, the recognition performance is limited in a low signal-to-noise ratio environment, so that how to improve the recognition accuracy in the scene becomes a key problem to be broken through urgently. According to the radio frequency fingerprint identification method based on feature fusion provided by the invention, the one-dimensional radio frequency signal and the two-dimensional time-frequency graph are subjected to multi-modal fusion through the double-path cross attention fusion network, and useful complementary features are further extracted from noise, so that the influence of the noise is reduced, and the identification accuracy of unknown equipment is improved.

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.

Methods and systems for performing secure quantum key distribution (QKD) while detecting photon interception and eavesdropping. A first computing device generates a challenge set using a secret seed, applies the challenges to its CRP, and receives an ordered set n responses. Those responses are sent under a QKD protocol. The second computing device generates the same challenges and recovers the same responses with a mirror CRP mechanism. The second device identifies generated responses that match received responses. Bit errors in these matching response pairs provide a measured of BER on the channel. BER that is significantly above a nominal BER indicates eavesdropping.

The invention relates to the technical field of industrial internet-of-things safety communication, in particular to an industrial internet-of-things edge computing safety communication method based on federated learning, which comprises the following steps of: constructing a unified collaboration framework of an industrial internet-of-things system; an interference signal is sent to the eavesdropping device through the edge computing server at the interference power, so that the secure transmission rate of the communication channel is a positive value in the presence of eavesdropping; calculating the total energy consumption of the edge computing server under different task unloading strategies, wherein the total energy consumption of the edge computing server does not exceed the maximum value of energy consumption which can be borne by the industrial Internet of Things system; and constructing an unloading decision model based on federated learning, and outputting an optimal unloading decision based on the unloading decision model by taking the minimum average calculation task time delay as a target. According to the method, the unified collaboration framework of the industrial Internet of Things system is constructed, federated learning and edge computing technologies are combined, data privacy protection and communication security can be remarkably improved, and the time for averaging computing tasks is minimized under the energy consumption constraint.

The utility model relates to the technical field of eavesdropping prevention, in particular to a terminal anti-eavesdropping device and a terminal anti-eavesdropping system. The device comprises a first connection module, an audio management module, a storage module and an access management module, and the first connection module is used for establishing communication connection with an external terminal to obtain the audio control authority of the external terminal and obtain to-be-stored data; the audio management module is connected with the access management module, and a preset audio signal is built in the audio management module and is transmitted to the access management module; the access management module is connected with the first connection module, the storage module and the audio management module, and the access management module is used for performing data transmission with the storage module, performing data transmission with an external terminal through the first connection module and transmitting a preset audio signal to the external terminal through the first connection module. On the basis of anti-eavesdropping, the system also has data storage and reading functions, and has richer functions.

As automotive security concerns are rising, the Controller Area Network (CAN)—the de facto standard of in-vehicle communication protocol—has come under scrutiny due to its lack of encryption and authentication. Several vulnerabilities, such as eavesdropping, spoofing, and replay attacks, have shown that the current implementation needs to be extended. Both academic and commercial solutions for a secure CAN have been proposed, but OEMs have not yet integrated them into their products. The main reasons for this lack of adoption are their heavy use of limited computational resources in the vehicle, increased latency that can lead to missed deadlines for safety-critical messages, as well as insufficient space available in a CAN frame to include a Message Authentication Code (MAC). By making a trade-off between security and performance, this disclosure overcomes the aforementioned problems of a secure CAN.

The invention belongs to the technical field of quantum communication, and particularly relates to a discrete variable quantum key distribution data coordination method and system based on a code rate adaptive multi-system LDPC code. Aiming at the defect of performance bottleneck of an existing discrete variable quantum key distribution system adopting a binary low-density parity check code in a long-distance and high-noise environment, the invention provides a discrete variable quantum key distribution data coordination method. The method comprises the following steps: preparing and transmitting a quantum state; screening data; error rate estimation and eavesdropping detection; data coordination based on symbol-level code rate adaptation and / or bit-level code rate adaptation; and confidentiality enhancement. According to the method disclosed by the invention, the construction and storage pressure of the system on error correction codes with different code rates is obviously reduced, the robustness of the system under a complex channel condition is enhanced, and efficient and unconditionally safe key distribution is ensured; the eavesdropping attack can be effectively resisted, and the communication security is ensured.

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 discloses a spectrum resource allocation method, which comprises the following steps of: deploying a plurality of pairs of information transceivers, a passive backscatter label group and an eavesdropping user in a backscatter communication system, each passive backscattering label is equipped with an energy collection and conversion module and an information reflection module; constructing a resource allocation model meeting a reflection signal and rate maximization of secure communication; constructing a directed hypergraph based on a backscattering system and coloring the directed hypergraph; in order to solve the non-convexity problem of a resource optimization model, an auxiliary variable is introduced to remodel a resource allocation model, and eavesdropping threats are reduced from the physical level. The method provided by the invention can maximize the sum rate of the reflected signals in the system on the premise of ensuring the secure communication of each sub-channel, effectively reduces the interference among the reflected signals by dividing spectrum resources and introducing artificial noise, restrains the influence of eavesdropping users on the security of the system, and meets the requirements of the users on the quality of service.

The present invention relates to the technical field of communications. Disclosed is a two-party quantum secret magnitude comparison method based on a two-level bell state. The present invention comprises the following steps: step I: protocol participants Alice and Bob respectively possessing their own secret values SA and SB, and Alice and Bob sharing a secure n-bit key KAB=KAB1KAB2KKABn by means of QKD; and step II: Alice and Bob sharing a collision-resistant hash function Hash(.) that is resistant to quantum algorithms, and with the assistance of a semi-trusted third party (TP), Alice and Bob completing the comparison between the magnitudes of the secret values of the two. By means of the present invention, an equality relationship and magnitude relationship between the secret values of the two participants, i.e. Alice and Bob, can be effectively determined; a quantum state prepared by the TP is a two-particle maximally entangled Bell state; and by means of the first eavesdropping detection, the absence of eavesdroppers and the honesty of the TP are verified.

The embodiment of the invention provides a rail transit quantum communication system data transmission method, device and system and a medium, and relates to the technical field of data transmission. The method comprises the following steps: performing quantum key distribution through a first channel; and transmitting the train data encrypted by the quantum key through a second channel. A quantum communication dual-channel isolation architecture is adopted, namely, a first channel is specially used for quantum key distribution, a second channel is specially used for transmitting encrypted data, a key distribution characteristic of information theory security is realized by utilizing a quantum key distribution technology based on a quantum mechanics principle, key distribution and a data transmission channel are physically isolated, and the security of the key distribution is improved. The risk of secret key and data mixed leakage is avoided, so that traditional eavesdropping and quantum computing attacks are effectively resisted, the safety and integrity of train data in the transmission process are guaranteed, quantum-level safety guarantee is provided for train-ground communication, safety accidents and economic losses caused by information leakage are avoided, and the safety and reliability of train-ground communication are improved. And meanwhile, low time delay and high efficiency of the communication system are ensured.

The invention relates to a dynamic wireless key frequency hopping communication anti-interference system and a method thereof. The system comprises a transmitting end and a receiving end, the transmitting end comprises an information source scrambling module, a Turbo coding module, a spread spectrum module, a framing module, a frequency hopping pattern generation module and a forming filtering module; and the receiving end comprises a digital front-end processing module, a frequency hopping synchronization module, a signal synchronization module and a demodulation module. The frequency hopping pattern based on the chaotic system has high randomness and predictability, and tracking interference and eavesdropping are effectively resisted.

Techniques and methods are described to generate a shared secret key using channel characteristics between a transmitting device and a receiving device. A public key is transmitted to a communication device over a first wireless channel and a second wireless channel that is different from the first wireless channel. From the communication device, a first signal and a second signal both carrying the public key are received over the first wireless channel and the second wireless channel, respectively. Based on the first signal and the public key, a first channel response is calculated and, based on the second signal and the public key, a second channel response is calculated. The secret key is determined based on the first and second channel response. In this way, the generation of a channel-based shared secret key becomes more secure and robust against eavesdropping of illegitimate users, allowing for secure communication.

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 invention discloses a natural language processing system encryption method, electronic equipment and a computer readable medium. The method comprises the following steps: acquiring a character mapping relationship between an original character and an encrypted character determined based on a character encryption algorithm; according to a Token ID transformation algorithm, a Token ID mapping relation between the original Token ID and the transformed Token ID is determined; and according to the character mapping relationship and the Token ID mapping relationship, encrypting a pre-trained natural language processing system, so that the encrypted natural language processing system can output a ciphertext response based on an input ciphertext prompt word. Side channel attacks and middle eavesdropping can be resisted, the exposure risk of original data is remarkably reduced, the data security is improved, mathematical reconstruction of computational logic of the system is avoided, so that the computational overhead is remarkably reduced, the reasoning delay is reduced, the computational efficiency and the response real-time performance are improved, a natural language processing system does not need to be retrained, and the method is easy to implement. The calculation overhead is further reduced, and the encryption efficiency is improved.

The invention discloses an unmanned aerial vehicle track and multi-domain resource joint planning method based on situation awareness, and belongs to the field of satellite communication. Aiming at unmanned aerial vehicle assisted satellite communication in an unreliable complex channel environment, a framework based on perception, transmission, calculation and navigation integration is constructed, and available resources are jointly optimized. And comprehensively designing the movement track of the unmanned aerial vehicle and the power and strategy of the general inductance calculation, and completing the data transmission task within the shortest time when the safety requirement is met. In order to reduce complexity, an original optimization problem is divided into two sub-processes of situation awareness and anti-interception transmission. Based on unmanned aerial vehicle trajectory and multi-domain resource joint planning, unmanned aerial vehicle adaptive trajectory planning is realized, an unknown eavesdropping environment is perceived, and an eavesdropping environment situation map is constructed step by step while data calculation and uploading are considered. Based on a trajectory and resource joint optimization algorithm of A * and a greedy algorithm, according to planned unmanned aerial vehicle trajectory calculation frequency, uploading power and a calculation strategy, a shortest path of a transmission task is obtained, and meanwhile, corresponding calculation and transmission power is matched.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a network entity using a first security key of a first security configuration which encrypts a first message sent to or received from the network entity. The UE may then receive a control message that indicates that a wireless device has been detected attempting to intercept or eavesdrop the first message communicated between the UE and the network entity. The control message may identify the eavesdropping wireless device, and may include a second security key associated with a greater security strength than the first security key. The control message may also instruct the UE to switch from the first security configuration to the second security configuration based on the presence of the eavesdropper. The UE may then communicate a second message with the network entity that is encrypted using the second security configuration.

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 application provides a new physical layer encryption and authentication cooperation security method, solves the problem that the ability of encryption technology to resist differential attack depends on the rapid update of a key; at a sending end, a hash function is used to generate an encryption sequence by using the key and the digital features of information, and the information is subjected to the action of the encryption sequence; the encryption sequence will greatly change when the key is unchanged and the information changes, and the digital features of the information before and after encryption remain unchanged; at a receiving end, the received information can be used to regenerate a decryption sequence by using the digital features of the information and the key before decryption, and the decryption sequence is used for decryption; the requirement of key update is greatly reduced, and the rate requirement and the cost of key generation and distribution are reduced. The generation of the digital label required by the authentication does not depend on the ciphertext itself or the plaintext itself, but uses the same signal digital features, the key and the hash function as when the encryption sequence is generated, and better cooperation is achieved, that is, the cooperation realizes the physical layer security, prevents eavesdropping and attack.

The invention provides a multi-dimensional optimization-based unmanned aerial vehicle data security acquisition method and system, and the method comprises the steps: constructing an unmanned aerial vehicle-assisted Internet of Things data acquisition system which comprises an unmanned aerial vehicle, a plurality of sensors, a plurality of auxiliary devices and a potential eavesdropper, discretizing a task acquisition period into a plurality of time slots; introducing a sensor scheduling variable to perform dormancy wakeup management on the ground sensor, and introducing an interferer selection variable to select an auxiliary device as a friendly interferer based on a channel condition; establishing a path loss model of a ground-air channel and a ground-ground channel to obtain a channel gain, defining a transmission rate and an eavesdropping rate, considering the uncertainty of the position of an eavesdropper to construct a worst-case secrecy rate model of the unmanned aerial vehicle, and setting constraint conditions; a data acquisition problem is formalized into a secrecy rate maximization problem and decomposed into three sub-problems, the sub-problems are solved, and an optimized unmanned aerial vehicle trajectory, sensor scheduling and jammer selection strategy is output.

The invention relates to the technical field of charging facility network security, in particular to a charging pile and a charging pile control method. According to the charging pile, digital certificate dual verification and encryption communication are carried out between the cloud server and the gateway board, the risk of user information leakage caused by man-in-the-middle attack, data eavesdropping and the like is reduced, and the user experience is improved by carrying out second encryption verification on the gateway board and the control board. The risk that the data of the charging pile are tampered due to counterfeiting of the digital certificate is reduced, and compared with identity verification achieved only based on a cloud server in the prior art, the technical effect of improving the network security of the charging pile is achieved.

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 discloses a secure communication system based on quantum key distribution, and relates to the field of encrypted communication, and the system comprises a key generation module which is used for generating a quantum key and synchronously forwarding the currently generated quantum key to a distribution module; the distribution module is used for receiving the quantum key generated in the key generation module, distributing the quantum key to users of both communication parties, synchronously detecting the transmission quality of the quantum signal and monitoring whether an eavesdropping behavior exists or not; the encryption module is used for receiving plaintext data from a sender, performing encryption processing on the plaintext data by using a quantum key and a one-time password book encryption algorithm, and converting a plaintext into a ciphertext; according to the method, the highly random and safe secret key is generated by utilizing quantum mechanical characteristics, the confidentiality of communication is fundamentally guaranteed, and the secret key generation mode is based on the unique property of the quantum state, so that the secret key is difficult to crack or steal.