157 results about "Quantum channel" patented technology

The invention provides a multi-source heterogeneous distributed computing power fusion scheduling method and system, and the method comprises the steps: carrying out the multi-dimensional collection and preprocessing of heterogeneous scheduling source data, generating a scheduling joint data set, carrying out the key demand prediction processing of a task set based on a preset quantum channel topology, generating a key pre-distribution matrix, and carrying out the key pre-distribution matrix, and generating a real-time task queue according to a task set of the scheduling joint data set, and performing multi-target matching degree calculation processing on the key pre-distribution matrix and the real-time task queue based on a dynamic priority quantification model to generate a distribution decision matrix. Then adaptive key supplement and migration path optimization processing are performed on the allocation decision matrix to obtain a migration task set, and finally hidden node resource prediction and preset quantum channel topology updating are performed on the migration task set, so that the rationality of key allocation is improved, the problem of compatible conflicts of resource scheduling is solved, and the resource scheduling efficiency is improved. Therefore, the task migration success rate is improved.

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 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 discloses a switch secure communication encryption method based on quantum key distribution. The method comprises the following steps: a service party submits a'security-delay-bandwidth 'intention to a zero-trust brain through a quantum policy intention description language; evaluating the real-time quality, key margin and topology accessibility of an optical fiber quantum channel, a classical ultra-high-speed channel and a radio frequency space channel according to intention requirements; triggering a QKD transmitting end and a receiving end to perform quantum state transmission of polarization and OAM coding along the optimal quantum path, completing basis vector comparison, error code verification and privacy amplification, generating a root quantum key, and injecting the root quantum key into an on-chip quantum memory; when a data packet arrives at a switch port, the assembly line takes out Kroot from the first-level key pool, and derives a one-time session key through the HMAC-SHA3; continuously monitoring a quantum channel bit error rate, a key pool margin and an AI abnormal score; and the transmitting and receiving parties synchronously confirm and destroy the session key, write all key life cycle events into a quantum invariant account book, and realize second-level auditing evidence obtaining through block chain hash anchoring.

A method for secure quantum communication includes generating a photon. The method includes modulating at least two quantum state dimensions selected from the group consisting of orbital angular momentum (OAM), polarization, and phase of the photon to form a composite quantum state. The method includes directing the photon to an emission point on a helical structure having a defined spatial coordinate corresponding to classical data. The method includes emitting the photon from the emission point into a quantum channel. The composite quantum state and spatial coordinate together encode secure information.

The invention discloses a continuous variable quantum key distribution method, device and system, and belongs to the field of wireless communication. Firstly, a sending end generates continuous light pulses for discrete coding, a one-dimensional discrete modulation signal is generated, quantum signal light is generated through an attenuator, and the quantum signal light is coupled to a quantum channel for transmission. Then, a receiving end adopts a homodyne detector to measure the regular component of the quantum signal in a self-calibration manner; and after a local measurement base direction and a phase drift angle introduced by a dynamic compensation quantum channel are adjusted in real time, a covariance matrix is calculated and input into a post-processing module, the code rate of the system is further calculated, and a security key is generated by using a protocol between a receiving end and a transmitting end. According to the device, the intensity modulator is connected between the laser and the attenuator, so that one-dimensional discrete modulation is realized, and dependence on a phase reference signal is avoided. According to the system, a traditional phase locking module is removed, an asymmetric phase space coding mechanism is adopted, dependence on a phase reference signal is eliminated, and the safety and stability of the system are improved.

The classical channel employs a transmit laser and classical modulator. The quantum channel employs a nonlinear medium and spontaneous parametric down conversion producing quantum entangled signal and idler photon pairs which are encoded. The classical and quantum channels are combined to define a propagated hybrid signal. The receiver splits the hybrid signal on basis of wavelength into classical and quantum channels. The quantum receiver employs optical parametric amplification, supplied with energy from a second harmonic generation device synchronized to the classical carrier wavelength. A photodetector and extracts a quantum message from the quantum signal.

The invention discloses an urban trunk network-oriented reconfigurable quantum communication route synchronization system, which relates to the technical field of quantum communication and comprises a quantum channel state sensing module, a clock offset prediction and registration module, a reconfigurable route planning engine, an entangled state registration and regulation module, a synchronization instruction scheduling module and an optimization module. According to the system, de-coherence time, entanglement fidelity and synchronous offset risk of a quantum link are sensed in real time, a quantum link feasibility scoring graph is generated in combination with a graph neural network, and an optimal entanglement forwarding path is output according to the quantum link feasibility scoring graph; meanwhile, the width and rhythm of a transmission window are dynamically adjusted based on task priorities and network loads, and cross-node high-precision synchronization and resource coordination are achieved; a routing and synchronization strategy can be continuously optimized by introducing a communication performance evaluation model and a feedback learning mechanism; according to the invention, the stability of the quantum communication system in a complex urban network environment is significantly improved.

The invention relates to a quantum sensing intelligent key distribution method for an intelligent quantum communication network, and the method comprises the steps: inputting original observation data of a quantum channel to a computer system, and extracting a quantum feature vector of each step; stacking into a two-dimensional matrix, and obtaining space-time representation through a convolutional neural network; obtaining time sequence cleaning features in combination with a bidirectional long-short-term memory network and an attention mechanism; extracting associated quantum channel characteristics and noise statistics, and executing anomaly detection and error correction prediction; a near-end strategy optimization algorithm is used for inputting the two to adjust the transmission distance and protocol parameters; and constructing a saturated noise channel model in combination with the adjustment parameters, and carrying out error correction and privacy amplification to generate a final security key. The method aims to fully combine quantum feature perception, depth sequence modeling and reinforcement learning optimization mechanisms, and realizes robust feature extraction of original observation of a quantum channel by constructing high-dimensional quantum feature mapping and performing standardization, filtering and abnormal value processing.

The invention discloses an intelligent cloud service system construction method based on quantum security, and relates to the technical field of information security, and the method comprises the following steps: in a multi-tenant cloud environment, distributing an independent quantum key generation module for each tenant, ensuring that the key generation processes of the tenants are mutually isolated, and preventing the cross use of keys. According to the invention, the independent quantum key generation module is distributed for each tenant, so that the problems of cross use and leakage of keys in a multi-tenant cloud environment are solved. And a quantum key updating mechanism and accurate synchronous control are introduced, so that the keys are periodically updated and kept consistent, and the security risk caused by key aging is prevented. By combining the physical principles of quantum inseparable and superimposed state characteristics and the like and quantum channel optimization, the system realizes safe and efficient key transmission, and timely responds to potential security problems through real-time monitoring and anomaly detection, so that the resistance and overall security of the system to quantum computing attacks are improved.

The invention provides an entanglement coding quantum direct communication method and system. The method comprises the following steps: an entanglement source sends a first photon in an entanglement photon pair to a first measurement terminal machine and sends a second photon in the entanglement photon pair to a second measurement terminal machine; the first measurement terminal machine encodes the first information to obtain a first information encoding bit sequence, and selects a corresponding demodulation quantum state according to the first information encoding bit sequence to demodulate and detect the received first photon; the second measurement terminal machine carries out demodulation detection on the received second photon; the first measurement terminal machine and the second measurement terminal machine carry out basis screening and quantum channel security analysis based on a demodulation detection result, and when a quantum channel security analysis result is that a security requirement is met, post-processing is carried out according to a basis screening result to obtain a first information decoding bit sequence, and the first information decoding bit sequence is sent to the second measurement terminal machine; the second measurement terminal machine decodes the first information decoding bit sequence to obtain first information; quantum direct communication based on entanglement coding can be realized.

The embodiment of the invention relates to the technical field of quantum communication, and discloses a quantum communication network simulation test platform and method, and the test platform comprises a scene simulation test frame, a pressure test module and a quantum channel attenuation simulator. The scene simulation test framework is used for simulating quantum communication network scenes in different running states, and the running states at least comprise running states of a quantum communication network in different distances, different noise environments and / or different attack scenes; the pressure test module is used for performing a pressure test in the quantum communication network scene simulated by the scene simulation test framework; and the quantum channel attenuation simulator is used for simulating quantum channel attenuation aiming at a quantum communication network scene in the testing process of the pressure testing module. By simulating quantum communication network scenes in running states under different distances, different noise environments and different attack scenes, the quantum secret communication network test scenes are more comprehensive, and the accuracy of test results is improved.

The invention discloses a quantum entanglement distribution downlink loss estimation method based on a neural network, and the method comprises the steps: determining flight parameters, constructing a loss model, calculating the transmissivity of a quantum channel, and calculating the loss of the quantum channel. Constructing a channel loss estimation model, training and optimizing the channel loss estimation model by using a neural network, and estimating the loss of a downlink in quantum entanglement distribution of the mobile unmanned aerial vehicle by using the trained channel loss estimation model; the invention relates to a system, equipment and a medium for realizing a quantum entanglement distribution downlink loss estimation method based on a neural network. According to the invention, the vacancy of less research on a near-ground airborne ground-air downlink scene based on a mobile air platform is filled up; errors caused by random jitter of the unmanned aerial vehicle can be reduced by using the model optimized by the neural network, and relatively accurate channel transmissivity estimation of the ground-air quantum communication downlink is realized.

The invention discloses a data security transmission method and system based on homomorphic encryption and quantum key distribution, and relates to the technical field of data security transmission, the method comprises the following steps: carrying out homomorphic encryption processing on plaintext data at a sending end according to a predetermined encryption strategy to obtain ciphertext data; activating the quantum channel, extracting a key distribution strategy embedded in the quantum channel, distributing the quantum key according to the key distribution strategy, and transmitting the quantum key to a receiving end; and acquiring the ciphertext data sent by the sending end through a classic channel at a receiving end, and decrypting the ciphertext data by using a quantum key to obtain decrypted data. The technical problems that in the prior art, secret key transmission is low in safety, data encryption calculation is limited, transmission is prone to being attacked and eavesdropped by a man-in-the-middle, and data integrity and authenticity are difficult to guarantee are solved, and safe encryption transmission, reliable secret key distribution and accurate decryption of data in the transmission process are achieved. And the technical effects of data security and transmission integrity are ensured.

The invention discloses a quantum key distribution system based on an OTN network, and the system comprises a plurality of nodes, and each node is in communication connection with at least one node through an optical fiber; the sending node encrypts to-be-transmitted service data through the quantum key, and the encrypted service data is transmitted to the target node through the corresponding optical fiber; and after receiving the encrypted service data, the target node reads the symmetric quantum keys from the key pool to decrypt the encrypted service data. The QKD technology is applied to the OTN network, the QKD technology is based on quantum physical characteristics such as the measurement collapse theory, the uncertainty principle and the unclonable principle, service data are encrypted through a quantum key, and the advantage of information theory safety is achieved; and meanwhile, through dynamic adaptation of the optical switch and the service channel, hardware resource waste caused by additionally deploying a plurality of quantum channels is avoided, and the security and the transmission performance are both considered. The technology is suitable for OTN multi-node networking and multi-service concurrent quantum security networking scenes, such as finance, government affairs and medical treatment.

The invention belongs to the technical field of security encryption, and provides a security encryption communication method based on quantum key management, which comprises the following steps of: preprocessing and dividing acquired data, establishing a simulation model of corresponding equipment, acquiring and calculating channel data, and dividing channel state grades; the method comprises the following steps: establishing a quantum channel by two communication parties, obtaining a quantum key after calibrating the quantum channel, determining management responsibility and link requirements, dynamically generating the quantum key according to a channel condition, distinguishing the quantum key according to purposes, and separately storing the quantum key; the method comprises the following steps: grading communication requirements of a channel in advance, dynamically determining a key updating frequency in combination with data transmission quantity and requirement change, dynamically allocating key resources according to real-time requirements, inputting key updating and allocation strategies and actual conditions into a reinforcement learning model, and performing updating iteration on strategy parameters according to feedback.

The invention relates to quantum key distribution, in particular to a quantum key distribution system and method based on end-to-end loss control and enhanced Alice, and is characterized in that on the basis of traditional Alice, an OTDR (Optical Time Domain Reflectometer) transmitting unit and a transmission measurement transmitting unit are integrated; according to the enhanced Bob, on the basis of a traditional Bob, an OTDR receiving unit and a transmission measurement receiving unit are integrated; the data processing and control unit is used for generating an OTDR reflectogram and a loss tomogram, calculating a total effective leakage value, optimizing signal strength and privacy amplification parameters according to the latest effective leakage value, performing information coordination and privacy amplification, continuously performing channel fingerprint authentication and safely terminating when abnormity occurs under the cooperation of the enhanced Alice and the enhanced Bob; the inherent physical structure of the optical fiber quantum channel serves as a physical unclonable function; according to the invention, the defect of sharp contradiction among the key rate, the transmission distance and the actual security can be overcome.

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 embodiment of the invention relates to the technical field of quantum keys, and discloses an OpenVPN network system based on quantum key negotiation and a communication method. According to the OpenVPN network system based on quantum key negotiation, an OpenVPN client is installed on user equipment and used for initiating a VPN connection request; the OpenVPN server is deployed in a network center and is used for receiving the connection request and establishing a quantum channel; the quantum key distribution device comprises a quantum key management terminal and a quantum key generation device. The quantum key management terminal is used for responding to a quantum key service request of the OpenVPN client and returning the quantum key obtained from the quantum key generation device to the OpenVPN client; and the quantum key generation equipment is used for negotiating and generating a quantum key through a random number generator by using a quantum key distribution technology, and transmitting the quantum key to the quantum key management terminal through a quantum channel. The security of the quantum key is ensured, the transmission flexibility of the quantum key is improved, and the cost of hardware equipment is reduced.

A method for performing a quantum key distribution protocol among a first device, a second device, and an intermediary device (ID), the method including the ID transmitting a first secret symbol string to the first device via a quantum channel and a second secret symbol string to the second device via another quantum channel; the first and second devices demodulate their respective symbol strings and transmit reported symbol numbers to the ID; the ID shares basis state sets with both devices and generates a third symbol string by combining subsets of the first and second secret symbol strings corresponding to the reported symbol numbers; the ID transmits this third symbol string to the second device; and the first and second devices perform quantum key exchange by sifting validly received symbols in common positions.

The invention discloses a communication method, device and system, communication equipment, a readable storage medium and a program product, and the method comprises the steps: receiving a first signaling message sent by a first core network element through a first shunting module, and when the first signaling message is recognized as a sensitive message, sending the sensitive message to a first core network element; the first signaling message is sent to the first quantum communication module; the first signaling message is coded and modulated through the first quantum communication module, and the coded and modulated first signaling message is sent to a second quantum communication module at the network element side of a second core network through a quantum channel; therefore, the data security on the physical communication line between the distributed network elements is realized, and the overall security and transmission efficiency of the cross-domain distributed deployment network architecture are improved.

1. The name of the design product: the graphical user interface of the programmable quantum channel switching system of electronic equipment. 2. The use of the design product: an electronic device. 3. The design points of the design product: the graphical user interface. 4. The picture or photo that best indicates the design points: design 1 front view. 5. Design 1 is designated as the basic design. 6. The use of the graphical user interface: for the software running and data state display and setting of the programmable quantum channel switching system. 7. The human-computer interaction mode of the graphical user interface: design 1 front view is the software main interface, and in design 1 front view, "channel information definition" is clicked to enter design 1 interface change state diagram; design 2 front view is the software main interface, and in design 2 front view, "channel switching configuration" is clicked to enter design 2 interface change state diagram.

The present invention discloses a method for predicting quantum channel noise in a multi-core optical fiber based on data set dimensionality reduction processing. This method evaluates the time delay introduced by quantum channel noise when a new service arrives when quantum signals and classical signals are transmitted in the same multi-core optical fiber, and establishes an effective noise prediction model based on machine learning. It is applicable to multi-core optical fiber quantum light transmission systems with any number of cores and any number of wavelengths. In response to the problem of too many features in the noise data set, the present invention uses a method to reduce the number of features in the data set based on the noise characteristics. Link noise is evaluated by using a noise prediction model established by two machine learning algorithms, XGBoost and LightGBM, in order to reduce the noise evaluation time. Compared with noise prediction models based on other machine learning algorithms, this method has the advantages of high prediction accuracy and fast prediction speed, and has made contributions to the practical application of quantum key distribution and classical signal fusion networking.

One object of the invention is a method for distributing a secret key via a quantum channel using a satellite (and an associated architecture) in which the distribution planning is performed in real time by the satellite itself and by the ground quantum communication stations, without the intervention of a mission control center external to the stations. The satellite is autonomous and manages its own resources. In this architecture, the satellite autonomously and independently acquires the information necessary for mission planning from the ground mission control center. [Fig. 3B]

Method for distributing pairs of secure secret keys intended to secure communications between a first communication station (S1) and a second communication station (S2), said method comprising the following steps: exchanging, via a quantum channel (CQ1) linking a satellite (Sat) to said first communication station (S1), a first secret key; exchanging, via a quantum channel (CQ2) linking said satellite (Sat) to said second communication station (S2), a second secret key; receiving, in said satellite, a communication request between the first and second communication stations issued by said first or second communication station, referred to as the transmitting station; encrypting, in said satellite, the first secret key (by a symmetric encryption method which uses the second secret key (,in order to generate a first encrypted message ( ) and transmit said first encrypted message to said second communication station (S2) via an authenticated channel ( , called first authenticated channel. [Fig. 3A],

This invention discloses an integrated quantum key distribution device and method, which serves as both a transmitter and a receiver. As a transmitter, an optical injection locking device generates a group of optical pulses, which, after passing through an optical attenuator, are input to an unequal-arm Mach-Zehnder interferometer to obtain the quantum states of the corresponding basis vectors, and then input to a quantum channel. As a receiver, quantum states are received from the quantum channel. For Z-based quantum states, the output is sent to a third single-photon detector for decoding after passing through an optical beamsplitter; for X-based or Y-based quantum states, the output is sent to the unequal-arm Mach-Zehnder interferometer after passing through an optical beamsplitter, and then to a first and second single-photon detector for decoding. This invention eliminates the need for external modulation, enabling quantum state preparation and measurement within a single device using only one interferometer. This reduces the complexity of the quantum key distribution system, improves its compactness, and facilitates practical application.

The invention relates to an ultrahigh-dimensional continuous variable quantum key distribution (CV-QKD) information negotiation method based on matrix cross rotation, which is characterized in that after quantum state transmission, basis screening and parameter estimation are completed, an associated Gaussian sequence with the length of N is generated, and due to the existence of quantum channel noise, the quality of an extracted key is possibly obviously reduced. To this end, multi-dimensional information negotiation becomes a critical step for correcting codeword errors in order to establish a shared key between two communicating parties and to leak key information as little as possible. According to the invention, the dimensionality of CV-QKD information negotiation is significantly improved based on matrix cross rotation, and efficient transmission of quantum keys is realized in combination with low-density parity check codes.

The invention relates to the technical field of information security and block chains, in particular to a quantum encryption and block chain-based cross-border agricultural product digital lading system, which comprises a quantum state sensing and key generation module for calculating a key life cycle according to a quantum channel bit error rate and a network transmission rate which are acquired in real time, a bit stream is extracted from a local quantum random number pool in the secret key life cycle to generate a one-time session secret key and a corresponding secret key identifier; and the dynamic encryption processing module is used for receiving the one-time session key and performing symmetric encryption operation on the agricultural product lading bill data by using the one-time session key so as to generate a lading bill ciphertext. According to the invention, through quantum state dynamic key making and ciphertext anchoring separation verification, a secure closed loop from a physical layer to an application layer is realized, so that the problem that a traditional system mostly adopts static encryption and cannot resist quantum computing power attack, so that long-term confidential faces backtracking cracking is solved.

A method for performing a key exchange using a quantum key distribution protocol between a first device (D1), a second device (D2), and an intermediary device (ID), wherein: ID receives first symbol set (SS1) over first quantum channel (QC1) transmitted from D1 and sends first receiving basis information (RBI1) to D1 which withholds from ID first transmitting basis information (TBI1); ID transmits second symbol set (SS2) over second quantum channel (QC2) and second transmitting basis information (TBI2) to D2 which withholds from ID second receiving basis information (RBI2); ID generates first (IS1) and second intermediate symbol (IS2) sets based on valid SS1 and SS2; wherein ID generates third intermediate symbol (IS3) set by combining IS1 and IS2 and sends IS3 set to D1 and / or D2; wherein D1 and D2 exchange TBI1 and RBI2 and / or RBI1 and TBI2 to determine a final shared key based on SS1, SS2, and IS3 sets.

The invention provides a duplex quantum direct communication method and system, and the method comprises the steps that a transmitter encodes first information to obtain a first information bit sequence, generates a corresponding modulation quantum state according to the first information bit sequence, and transmits the modulation quantum state to a receiver; the receiver encodes the second information to obtain a second information bit sequence, selects a corresponding demodulation quantum state according to the second information bit sequence, and adopts the demodulation quantum state to perform demodulation detection on the received modulation quantum state; the transmitter and the receiver carry out basis screening and quantum channel security analysis based on a demodulation detection result, and when a quantum channel security analysis result is that a security requirement is met, post-processing is carried out according to a basis screening result to obtain a decoding bit sequence; the transmitter decodes the decoding bit sequence to obtain second information; the receiver decodes the decoded bit sequence to obtain the first information. Therefore, mutual information transmission between the transmitter and the receiver is realized, and equipment deployment is simplified.