106 results about "Secure communication system" patented technology

The invention discloses a secret communication system of an unmanned aerial vehicle, which relates to the technical field of secret communication of the unmanned aerial vehicle and comprises a secret key generation and distributed storage unit, a dynamic secret key updating unit, a secret key destruction and tracing unit, a multi-band sensing and interference identification unit and a combined regulation and control unit. A dynamic key is generated through a chaos algorithm, and the security of the key is ensured in combination with block chain fragmentation storage and GPS binding encryption; updating the key according to the risk level, and transmitting the fragments by using an anti-quantum channel; after the communication is finished, the secret key fragments are invalidated, and anomaly detection and traceability are realized; scanning a multi-band frequency spectrum in real time, identifying an interference type and optimizing the model; and according to the interference intensity and the energy efficiency demand, dynamically switching the frequency bands, adjusting the power and enhancing the anti-interception capability. The problems that an existing unmanned aerial vehicle communication system is insufficient in safety, weak in anti-interference capacity, incomplete in key management mechanism and the like are effectively solved, and the safety, the anti-interference performance and the energy efficiency performance of unmanned aerial vehicle communication are remarkably improved.

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

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

A communications system for providing secure access to a digital resource of a group of digital resources accessible via the internet, the system comprising: a data processing hub accessible via an IP (internet protocol) address; and a plurality of user equipment (UEs) useable to communicate via the internet, each configured to have a cyber secure isolated environment (CISE) isolated from ambient software in the UE, and comprising a secure web browser (SWB); wherein the hub and CISE are configured so that digital resources in motion and at rest in CISE are visible to the hub.

A secure communication system enabling secure transport of information is disclosed. The system comprises a secure network with one or more packet processing units connected by links through an internal communication system. The secure network transports packets of information between credentialed and authenticated agents. Each packet is associated with a visa issued by a visa service. The visa specifies the procedures governing the processing of the packet by the packet processing units as it is transported along a compliant flow, between agents thorough the network, according to a set of policies specified in a network configuration. Packet processing units include docks and forwarders. Adaptors serving the agents communicate with the network through tie-ins to docks. The system also includes and admin service, accessible to one more admins, that facilitates configuration and management of the network.

The invention relates to a self-adaptive information negotiation method applicable to a continuous variable quantum key distribution system, which comprises the following steps of: estimating an optimal code rate that an LDPC (Low Density Parity Check) code should reach under a current quantum channel, converting an initial code rate into the optimal code rate by a receiver, and obtaining a low-reliability bit number l which needs to be disclosed in conversion calculation, the method comprises the following steps of: decoding an LLR (Local Library Ratio) by using Bob, sending the LLR to Alice through a classic channel in combination with an encryption technology, sorting absolute values of the LLR by Alice in a decoding iteration process, selecting l bit positions with low reliability, sending the bit positions to Bob, determining a bit value by Bob according to the bit positions with low reliability sent by Alice, and feeding back and sending the bit value to Alice, and correcting the LLR value by Alice according to bit information sent by Bob. According to the method disclosed by the invention, the code rate of the LDPC code can be flexibly adjusted along with the change of the state of the time-varying channel, and the negotiation efficiency is improved, so that the key rate of the system is improved. The method is excellent in performance in a time-varying channel environment, negotiation efficiency under a low signal-to-noise ratio condition can be remarkably improved, and an efficient and reliable information negotiation scheme is provided for practical application of a quantum secret communication system.

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.

A secure communication system is disclosed. Embodiments include automatically convert, using at least one processor and in response to the first feedback loop, the evaluation scores to updated evaluation scores. Embodiments include receive, using at least one processor coupled to memory, a second feedback loop from a third user in response to providing the updated evaluation scores to the third user. Embodiments include automatically convert, in response to the second feedback loop, the updated evaluation scores to transformed evaluation scores. Embodiments include provide one or more actions to at least one of the first user, the second user, and the third user based on the transformed evaluation scores and the clusters of similar variables, execution by at least one of the first user, the second user, and the third user of at least one of the one or more actions increasing at least one of the transformed evaluation scores.

The invention discloses an Internet of Vehicles secure communication system based on a quantum key. The system comprises a vehicle-mounted end, a roadside end and a cloud end. The vehicle-mounted end and the cloud end are matched and preset with multiple pairs of quantum keys and corresponding quantum key indexes; the invention further discloses an Internet of Vehicles secure communication method based on the quantum key, and the Internet of Vehicles secure communication method is realized based on the Internet of Vehicles secure communication system based on the quantum key. The invention discloses an Internet of Vehicles secure communication system and method based on quantum keys, a plurality of pairs of quantum keys and corresponding quantum key indexes are matched and preset at a vehicle-mounted end and a cloud end, and only the quantum key indexes instead of complete keys are transmitted through a lightweight index query protocol, so that the network load of the vehicle-mounted end can be reduced, and the security of the vehicle-mounted end is improved. The real-time performance of data transmission is greatly improved, and the vehicle is supported to maintain a stable safe communication rate during high-speed movement.

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 present invention is applicable to the field of device communication technology and provides an IoT group gateway secure communication system, comprising a server and device side. The server side includes a server-side PLC modulation module, a server-side PLC demodulation module, and a PLC-VLC conversion module. The device side includes a VLC photoelectric receiving module, a device-side PLC modulation module, and a device control module. The device-side PLC modulation module transmits a feedback signal to a PLC transmission line, and the server-side PLC demodulation module converts the feedback signal in the PLC transmission line into a data signal. The server-side PLC modulation module transmits the data signal to the PLC transmission line, and the PLC-VLC conversion module converts the high-frequency AC signal into a VLC spectrum signal. The VLC photoelectric receiving module receives the VLC spectrum signal and converts it into an electrical signal. The device side receives data using visible light VLC, and feedback data using PLC, which is more secure.

The invention belongs to the technical field of heterogeneous communication network security, and discloses a heterogeneous communication network physical layer security resource joint allocation method, system, equipment and medium based on multi-hop attention hypergraph convolution, and the method comprises the following steps: updating a node feature matrix to define a propagation operator of hypergraph convolution, and then according to the hyperedge type and the propagation operator, determining the hyperedge type according to the hyperedge type and the propagation operator; updating the multi-hop node feature matrix to carry out attention aggregation to obtain final node embedding, embedding the final node of any legal user node into an input multi-head task, distributing a base station access decision by multiple heads, and calculating the transmitting power and beam forming vector of a base station selected by the base station access decision to any legal user, and finally, based on a secrecy rate optimization problem, taking a negative value of the total secrecy rate as a loss function to guide physical layer security resource joint allocation. The system, the equipment and the medium are used for implementing the method. According to the invention, the physical layer security performance of the secret communication system is effectively improved.

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 invention relates to a secure communication system and method, which realizes data secure transmission through a direct and / or indirect communication mode between an intelligent device and a background server, and can realize device activation by utilizing the data secure transmission so as to realize background management and monitoring of the device and effectively prevent the device from being counterfeited, stolen and the like. And meanwhile, statistics of the number of customers is facilitated, the state of the intelligent equipment is determined, the user is reminded to carry out maintenance / abnormity reminding on the equipment, and the use experience of the user is improved.

A secure communication system enabling secure transport of information is disclosed. The system comprises a secure network with one or more packet processing units connected by links through an internal communication system. The secure network transports packets of information between credentialed and authenticated agents. Each packet is associated with a visa issued by a visa service. The visa specifies the procedures governing the processing of the packet by the packet processing units as it is transported along a compliant flow, between agents thorough the network, according to a set of policies specified in a network configuration. Packet processing units include docks and forwarders. Adaptors serving the agents communicate with the network through tie-ins to docks. The system also includes and admin service, accessible to one more admins, that facilitates configuration and management of the network.

[Problem] To provide an optical secure communication system with higher safety by carrying a QNSC signal using a coherent Hermite-Gaussian pulse, multiplexing the QNSC signal using coherent Hermite-Gaussian pulses of different orders, and adding a masking effect in a time domain. [Solution] An optical secure communication system for a quantum noise stream cipher (QNSC) signal for masking the phase and / or the amplitude level of an optical signal using quantum noise, wherein carrier light in a transmission unit and locally oscillated light in a reception unit of the QNSC signal comprise a coherent Hermite-Gaussian pulse with an amplitude given by an Hermite-Gaussian function.

The invention relates to a laser chaotic secret communication system based on coherent pumping phase conjugation, which belongs to the technical field of laser communication and comprises a signal transmitting module, an optical fiber link module, a conjugate transpose module and a signal receiving module. The signal transmitting module generates and modulates a chaotic carrier optical signal, and data encryption is realized through phase modulation; the optical fiber link module is used for long-distance signal transmission; the conjugate transpose module adopts an optical comb to generate coherent pump light, and generates phase conjugate waves through four-wave mixing to realize compensation of dispersion and nonlinear distortion in an optical fiber link; and the signal receiving module recovers original data through chaotic synchronization, coherent detection and digital signal processing. The phase locking characteristic of coherent pumping is utilized, the phase noise influence in a traditional pumping system is reduced, the stability of the system is improved, the anti-interference performance of chaotic secret communication and the transmission quality of the system are improved, and a feasible scheme is provided for achieving high-fidelity and high-safety long-distance optical communication.

A secure communication system according to the present disclosure includes a digital license plate installed on a vehicle and a server wirelessly connected to the digital license plate. The server includes one or more server processors and a non-transitory computer-readable server storage medium storing with one or more programmed instructions which, when executed by one or more server processors, cause the server processors to perform: receiving an image and a request to display the image at the digital license plate, verifying whether the image is digitally signed by an authorized party, refusing the request if the image is not digitally signed by the authorized party, and requiring the digital license plate to be unable to display the image.

The invention discloses a method for realizing joint covert communication and secret communication, which belongs to the technical field of wireless communication and comprises the following steps of: constructing a joint covert communication and secret communication system in a D2D (Device-to-Device) and cellular network scene; in the system, the detection performance of a base station (BS) and the secure transmission performance of confidential information of the base station in a cellular communication mode and a D2D communication mode are analyzed, and the secure transmission performance of the base station in the cellular communication mode and the D2D communication mode is optimized. The method comprises the following steps: firstly, in a D2D communication mode, maximizing the confidential transmission rate at a BS (Base Station) in each mode, and secondly, carrying out covert communication capability analysis on user equipment in a D2D communication mode and a forwarding party of the base station, namely obtaining the covert transmission rate of the user equipment and optimizing the transmission rate, and finally obtaining the optimal signal transmitting power of the user equipment of the forwarding party.

This invention provides a time-phase-based quantum lidar, which utilizes CMOS-compatible silicon-based optoelectronic integration technology to fabricate the transmitting and receiving chips. The advantages of chip-based integration include small size, light weight, and low power consumption, making it more practical for applications. The core chip for both quantum lidar and quantum secure communication systems, fabricated using integration technology, offers advantages such as small size, high precision, high speed, and low power consumption. This chip can be used for both quantum lidar and quantum secure communication.

A multi-station collaborative skywave massive MIMO secure communication system and method includes a description module, a setup module, a precoding module, a base station selection module, and a data acquisition module. The description module describes the roles and relationships of the various elements in the multi-station collaborative skywave secure communication method. The setup module establishes a mathematical model for user location-based precoding schemes, base station selection, and achievable rate distribution. The precoding module solves the precoding problem for each base station. The base station selection module selects the appropriate base station based on the user's location. This method effectively improves the poor security issues inherent in traditional shortwave communications, which suffer from low user rates and wide coverage.

The invention discloses an aluminum oxide zinc-based solar blind photoelectric detector and a preparation method and application thereof, and belongs to the technical field of photoelectric detectors. Comprising a substrate layer, an N-type semiconductor layer, a P-type semiconductor layer and a top electrode layer, the N-type semiconductor layer is arranged on the substrate layer, the P-type semiconductor layer is arranged on the N-type semiconductor layer, and the top electrode layer is arranged on the P-type semiconductor layer. The preparation method of the aluminum oxide zinc-based solar blind photoelectric detector comprises the following steps: cleaning indium tin oxide to obtain a bottom electrode; a metal aluminum target and a metal zinc target are co-sputtered on the bottom electrode through pulse magnetron in an argon oxygen environment to obtain an aluminum zinc oxide film; a metal copper target is sputtered on the aluminum zinc oxide film through pulse magnetron sputtering in an argon oxygen environment to obtain a copper oxide film; and the silver target is subjected to direct-current magnetron sputtering to obtain a silver top electrode. The preparation method is simple, the film stability is high, and later integration and application of the photoelectric detector are facilitated. The photoelectric detector is fast in response speed and high in responsivity, and shows huge potential as a secure communication system optical receiver using international Morse codes.

The invention provides a vehicle-mounted lightweight security communication system and method based on a cloud quantum key pool, and relates to the field of Internet of Vehicles information security. The method comprises the following steps: presetting the same root key in a hardware security module of a cloud terminal and a hardware security module of a vehicle-mounted terminal, obtaining a key application request of a quantum session of the vehicle-mounted terminal, and distributing a quantum session key of the communication from a cloud quantum key pool; based on the root key, encrypting a quantum session key of the communication to obtain a quantum key data packet and transmitting the quantum key data packet to the vehicle-mounted terminal; and analyzing a session key based on the quantum key data packet in the hardware security module, and encrypting the sensitive data by using the session key through a hardware accelerated symmetric encryption algorithm to obtain encrypted vehicle-mounted sensitive data, and decrypting and storing the encrypted vehicle-mounted sensitive data. The method is used in the communication process of the vehicle-mounted terminal and the cloud terminal, and solves the technical problem that the QKD is limited by a special optical fiber or precise sight distance free space optical communication in the mobile vehicle scene application.

This invention discloses a RIS-assisted secure satellite-to-ground communication method under interference, belonging to the field of secure satellite-to-ground communication. The invention is used in a RIS-assisted secure satellite-to-ground communication system, including a satellite transmitter, a RIS, a UAV, a receiver, and multiple EVEs. The UAV is used to transmit harmful interference signals. With maximizing the secure rate as the objective, and constrained by satellite transmit power constraint CR1 and RIS constant modulus constraint CR2, a secure communication system optimization problem is constructed. By using maximizing the secure rate as the optimization objective, secure communication is ensured even with the worst-case receiver. The satellite transmit power constraint CR1 ensures effective transmission by the signal transmitter, and the RIS constant modulus constraint CR2 ensures signal reflection. The RIS constant modulus constraint CR2 and the objective function are deconvexized, and the deconvexized secure communication system optimization problem is jointly optimized to obtain the maximized secure rate, ensuring reliable and secure communication of the multi-user secure communication system even under noise uncertainty.

The invention discloses a real-time confidential optical fiber transmission system and method. The system is provided with a chaotic AI model, a real-time chaotic encryption and decryption module, a synchronous control module and other key function modules. The method comprises the following steps: firstly, training an LSTM model, optimizing and deploying a chaos AI model, and encrypting transmission information at a transmitting end; performing up-sampling and pulse forming on the encrypted signal, compressing the signal frequency band width, performing normalization and quantization, and converting the signal into an analog signal through a DAC (Digital-to-Analog Converter); then, injecting into an electro-optical modulator, converting into an optical signal, and transmitting in an optical fiber transmission link; a photoelectric detection module is used at a receiving end to convert an optical signal into an electric signal, and after the electric signal is collected by an ADC, the electric signal is subtracted from the output of a local chaotic AI model of the receiving end to complete decryption; and finally, carrying out LMS equalization on a decryption result, and restoring an original signal. According to the invention, the problem of difficulty in chaos synchronization of the transmitting and receiving ends of the traditional chaos secure communication system is solved, and high-speed long-distance real-time chaos secure communication can be realized.

The application provides a kind of identity authentication method and system based on blockchain, comprising constructing the distributed two-way authentication and secure communication system of fusion PKI center node and blockchain consensus node;Identity information is configured according to user role;All identity information is stored in a decentralized manner using blockchain technology, and the key summary of identity information is stored on chain instead of original data;Client, server start two-way authentication process according to the trusted information stored on chain, and complete the negotiation and generation of session key;Client, server use the generated session key to perform symmetric encryption and decryption processing on the transmission content.The application effectively prevents the risk of personnel rule violation, data tampering and other risks through strict identity verification and operation traceability, and users can independently manage identity authorization range and use scenarios, thereby completely changing the situation that users passively accept information management and control under the traditional system.

The present invention relates to a physical layer security robust transmission scheme for an IRS-assisted wireless power supply communication system, belonging to the field of wireless communication technologies. It includes the following steps: Step 1: Establishment of a robust optimization system architecture for IRS-assisted WPCN secure communication; Step 2: Optimization of the energy and information transmission between the HAP and the user, including the following steps: Energy and information transmission between the HAP and the user; Optimization method. The WPCN secure communication system provided by the present invention utilizes an IRS-assisted communication system and conducts robust design, thereby improving the secrecy rate of the system; in the information transmission mode of the present invention, the beamforming technology in physical layer security is utilized to increase the information transmission rate gap between legitimate users and eavesdropping users, further ensuring the security of the information transmitted by users.

The invention relates to a perception auxiliary safety communication method of a movable antenna auxiliary safety communication system, and belongs to the field of wireless communication. The method comprises the following steps: in an eavesdropper sensing stage, a base station adjusts the positions of a transmitting movable antenna and a receiving movable antenna, transmits L sensing beams and collects all echo signals to obtain an estimated value of a space arrival angle of an eavesdropper; in the secure communication stage, the range of the eavesdropper is obtained based on the sensing stage, a robust beam forming vector transmitted by a base station is designed, and the transmission security rate of a legal user and the eavesdropping rate of the eavesdropper are determined; establishing a two-stage joint optimization problem to maximize the transmission security rate of the legal user under the worst condition and meet the joint optimization problem of perception constraint; and solving the established joint optimization problem to realize safe communication of the legal users. According to the invention, the joint optimization of the position of the movable antenna and the safe beamforming is realized, and the safety and robustness of the perception auxiliary communication system are improved.

The present application relates to the field of traffic communication, specifically to a secure communication system in traffic control network, including three modules of identity authentication, trust evaluation and communication encryption. In the communication node access of traffic control network, the asymmetric encryption and symmetric encryption double channels are used for parallel verification, and the initial channel is established to transmit non-critical data after being legal. The trust evaluation module fuses non-critical data, link delay and retransmission times, combines historical variance confidence index, and outputs communication trust score through model calculation to determine the node as encryption state or constraint state. In the encryption state, the encryption channel is established to transmit critical data in the signal switching window by using one-time session key; in the constraint state, the state snapshot is transmitted in time, and if it is continuously untrusted, the channel is closed, and the historical characteristics are called to accelerate the verification when accessing again. The system realizes the safe transmission of critical data and the efficient exchange of non-critical data, and improves the security and real-time performance of traffic control network.

A method, including generating a full trust group of entities, each entity of the full trust group performs at least one function of issuing a certificate, revoking the certificate, and verifying the certificate based on a digital license plate, generating a limited trust group of entities, each entity of the limited trust group performs at least one function of issuing a provisioning ticket, issuing a manufacturing receipt, verifying a provisioning ticket, provisioning a receipt, and operating the digital license plate, and provisioning the digital license plate based on at least one function from the full trust group and at least one function from the limited trust group.