128 results about "Quantum channel" patented technology

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

The invention 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 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 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.

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 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.

A semantically secure identification and communication method based on classical quantum channels comprises the following steps: constructing a classical quantum channel, selecting the input signal distribution and dividing the codeword, constructing an encoder, joint decoding, verification and identification, reliability analysis, and information leakage analysis. This invention divides the communication codeword into a main block and an auxiliary block. The main block uses an output statistical approximation of the transmission codebook, making it impossible for eavesdroppers to distinguish the communication signal from background noise. The auxiliary block uses a hash function for random mapping, preventing eavesdroppers from extracting valid information, thus achieving semantic security. Mapping the identification message to a combination of seed and hash value reduces the probability of confusion between different identification messages, improves identification accuracy, and provides a coding basis for analyzing false alarms, missed alarms, and information leakage. This invention has advantages such as strong confidentiality, strong concealment, high identification accuracy, and the ability to achieve identification communication while satisfying semantically secure requirements. It can be used for classical quantum secure communication.

This invention belongs to the field of quantum dialogue and discloses a one-step quantum dialogue method. In this method, communicator A prepares a large number of identical polarization-spatial hyperentangled states and sends one photon from each hyperentangled state to communicator B through a quantum channel, establishing a hyperentangled quantum channel between the two parties. After confirming the security of the photon transmission process, both parties encode the photon pairs according to the information to be transmitted. Then, by running nonlocal Bell state measurements and publishing the detector responses, both parties can read the information transmitted by the other, thus achieving bidirectional quantum communication, i.e., quantum dialogue. Compared with existing quantum dialogue protocols, this invention reduces the number of photon transmissions in the channel from two to one, simplifying experimental operations and effectively reducing the photon loss rate, which can effectively promote the practical application of quantum dialogue.

A quantum key distributed (QKD) apparatus for use with at least two endpoint devices, the apparatus including QKD links each having a communication medium with a quantum channel and a classical channel, wherein each endpoint has a QKD link connected to the QKD apparatus; transmitters to transmit quantum transmissions over a quantum channel of one of the QKD links; a classical transceiver component to transmit / receive classical data over a classical channel of one of the QKD links; and a controller to route data for quantum transmission to an endpoint via a transmitter assigned to the endpoint over a quantum channel of the QKD link of the endpoint, route classical data to an endpoint via a classical transceiver assigned to the endpoint over a classical channel of the QKD link of the endpoint, and route classical data over the classical channel of the QKD link of an endpoint.

A modular quantum data processing system includes at least: a first quantum data module, a second quantum data module, a quantum gate module, a quantum circuit router, a quantum channel module, a classical channel module, and a classical processing module. The quantum channel module includes a plurality of quantum channels, and the classical channel module includes a plurality of quantum channels.

The invention discloses a quantum key distribution network dynamic optimization method and system, a terminal and a storage medium. The method comprises the following steps: obtaining quantum channel state information in a quantum network; constructing a graph neural network dynamic model, and inputting the quantum channel state information into the graph neural network dynamic model to obtain link selection probabilities corresponding to a plurality of links; determining a key injection instruction according to the plurality of link selection probabilities; and generating an execution result according to the key injection instruction. According to the method, real-time optimization under channel jitter can be realized, and the key distribution efficiency is improved, so that the key rate can be improved, and the system efficiency is improved.

The application discloses a reconfigurable quantum communication route synchronization system for urban trunk network, relates to the technical field of quantum communication, and comprises a quantum channel state perception 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; the system perceives the decoherence time, entanglement fidelity and synchronization offset risk of a quantum link in real time, generates a quantum link feasibility score map in combination with a graph neural network, and outputs an optimal entanglement forwarding path accordingly; meanwhile, the transmission window width and rhythm are dynamically adjusted based on the task priority and network load, high-precision synchronization and resource coordination across nodes are realized, the communication performance evaluation model and feedback learning mechanism are introduced, and the route and synchronization strategy can be continuously optimized; and the application significantly improves the stability of the quantum communication system in a complex urban network environment.

The application relates to a quantum perception intelligent key distribution method for an intelligent quantum communication network, which comprises the following steps: inputting quantum channel original observation data into a computer system and extracting a quantum feature vector at each step; stacking the quantum feature vector into a two-dimensional matrix and performing space-time representation through a convolutional neural network; combining a bidirectional long short-term memory network and an attention mechanism to obtain time sequence cleaning features; extracting associated quantum channel features and noise statistics, performing abnormality detection and error correction prediction; inputting both into a proximal policy optimization algorithm to adjust transmission distance and protocol parameters; combining the adjusted parameters to construct a saturated noise channel model, correcting errors, amplifying privacy, and generating a final secure key. The application aims to fully combine quantum feature perception, deep sequence modeling and reinforcement learning optimization mechanism, construct high-dimensional quantum feature mapping, and perform standardization, filtering and abnormal value processing, so that robust feature extraction of quantum channel original observation is realized.

This technical solution relates to the field of digital data processing, in particular to the methods of managing backups of computer devices. The technical result is an increase in the security of backups due to using symmetric cryptographic keys transmitted over a quantum channel, each of which corresponds to a specific backup. The technical result is achieved due to a computer-implemented method of secure management of backup copies of RCM, with the function of RAM encryption on the CPU, using quantum key distribution (QKD), under which: a connection is formed between the RCM, at least one user device and a QKD device, while the QKD device creates a quantum channel, which connects the RCM with user devices, and the RCM and the user devices are connected via a data network; QKD device creates symmetric cryptographic keys, one of one of which is transmitted to the user device for storing registry keys, and the second is transferred to RCM, after receiving the key to the RCM, a backup copy (BC) is created with the help of the central processor, state of the processor memory in a given time is encrypted and transferred to a persistent data storage; and the RCM backup is performed through the following stages: a command from user device to restore the BC is sent, and said command contains a cryptographic key, which was used to form the required BC, encrypted using a new symmetric key derived from the QKD device; in response to a received command, the transmission of the BC to the RAM of RCM is performed; the QKD device is used to transmit said new symmetric key to the CPU and decrypt the primary key; the central processor with the relevant cryptographic key for the BC is used to restore the RCM, and said RCM is stored in RAM and contains the relevant state of the encrypted RAM of the RCM.