200 results about "Quantum network" patented technology

The invention discloses a digital signature method, a digital signature system and a quantum key card. The digital signature system comprises quantum network service stations, signature client sides, authentication client sides and quantum key cards, wherein the quantum network service stations are configured on the network side, and the signature client sides and the authentication client sides are configured on the user side. The digital signature method includes that a true random number is generated on the network side and then stored in the corresponding quantum key card and on the network side respectively to form a corresponding user-side key; the quantum key card matching with the signature client side uses the stored user-side key to generate a signature file, the signature file is sent to the authentication client side via the signature client side, and the authentication client side sends the received signature file to the current quantum network service station, acquires the corresponding user-side key from the network side to perform signature authentication on the signature file and sends signature authentication results to the corresponding authentication client side. The digital signature method, the digital signature system and the quantum key card have the advantage that key seeds are stored in the quantum key cards and the quantum network service stations, so that the problems of access use and safety of quantum network terminals are solved.

An electric power security communication network based on quantum key distribution technology comprises a power longitudinal encryption authentication device, a key generation control server, a classic switch, and a QKD system. The key generation control server is connected to the QKD system through the classic switch. Each power longitudinal encryption authentication device is provided with a QKD system which is connected to the power longitudinal encryption authentication device. The quantum key distribution is achieved through quantum channels among QKD systems. Communication among power longitudinal encryption authentication devices is achieved through classical channels. The power longitudinal encryption authentication device includes a quantum key transmission unit, a quantum key processing unit and an electric power communication data encryption unit, which are connected in sequence. Under a multi-user application situation, the interconnection among all the QKD systems will be achieved through all-pass typed light quantum switches. The invention further discloses an embodiment of integration of the electric power communication network and the quantum network. The electric power security communication network based on quantum key distribution technology has the advantage that the security in electric power communication network data transmission can be greatly improved by applying quantum communication technology into the traditional electric power communication network.

The invention discloses a communication system for realizing information encryption/decryption transmission based on a quantum network and a communication method. The communication system comprises quantum network service stations configured at a network side and clients configured at a user side. The system is also equipped with a quantum key card. True random numbers are generated at the network side. The true random numbers are respectively stored in the quantum key cards and the network side to form corresponding user side keys. The user side keys of the quantum key card and the network side are respectively used for encrypting and decrypting information when the clients communicate with the corresponding quantum network service stations. According to the system and the method, a quantum key seed is operated through utilization of the quantum key card, a large number of keys are generated in a short time, and the keys directly participate in the encryption and decryption processes of the information. The utilization efficiency of the keys is improved, the working process of the communication system is optimized, and the system and the method are beneficial for establishment and production of the quantum communication system and the application promotion of the quantum communication system in life.

The invention discloses a message authentication method and a message authentication system, wherein the message authentication system comprises a quantum network service station and a client side; the quantum network service station is configured at a network side; the client side is configured at a user side; Interaction of message authentication information carrying message authentication codes is carried out between the client side and the network side; comparative authentication is carried out by comparison of the respectively generated message authentication codes; a quantum key card is also arranged; the network side generates true random numbers to respectively store in the quantum key card and the network side, so that corresponding user side keys are formed; and the user side keys of the quantum key card and the network side are respectively used for generating the message authentication codes to perform comparative authentication. According to the message authentication method and system disclosed by the invention, advantages of the existing classical communication network are utilized; in combination with keys generated by a true random number generator and quantum key distribution, information data can be transmitted to a receiver only after stage-by-stage mutual message authentication is carried out; therefore, the correctness of the information data is ensured better; and furthermore, the security also cannot be reduced.

The invention provides a speaker recognition method combining a Gaussian mixture model and a quantum neural network. The method provided by the invention comprises the following steps: at the training stage, framing input training voice signals, extracting characteristic parameters and generating characteristic parameter vectors; then using a K mean value method and an EM (expectation-maximization) algorithm to obtain the Gaussian mixture model parameters of the characteristic parameter vectors, and finally utilizing the Gaussian mixture model parameters of all the training voice signals to train the quantum neural network; and at the recognition stage, obtaining the Gaussian mixture model parameters of a recognized speaker, then inputting the model parameters into the trained neural network, and obtaining a recognition result. The speaker recognition method is applicable to recognition of the speaker under the condition of less sample data and unbalanced sample data, and simultaneously the capability of the quantum neural network which can carries out effective judgment on voice data with cross data and fuzzy boundary of the speaker is utilized, so that the correct recognition rate of a system can be improved.

The invention discloses a quantum key relay service method which mainly solves the problems of safety and efficiency of a quantum key trusted relay process in a quantum communication network. The method provided by the invention comprises the following steps of: the quantum network management server selects a relay node according to the relay routing table and the current state index of the relaynode; the relay node sends an XOR value of the shared quantum key between the relay node and the two adjacent nodes to the quantum key relay server; the quantum key relay server performs XOR operationon the received corresponding XOR value to obtain the XOR value of the quantum key of the source node and the target node, and the source node and the target node can realize the sharing of the quantum key by disclosing the XOR value. According to the invention, the safety is higher, the efficiency is higher, and the relay delay is smaller; the method can be widely applied to quantum communication networks of various topological structures, and has very important practical application value.

The invention provides a component mounting and dispatching optimization method for a chip mounter on basis of a quantum neural network. The component mounting and dispatching optimization method comprises the steps of establishing a mathematical model of the sum of paths required by the operation of mounting all components on a printed circuit board (PCB) according to an operating principle of mounting the components by a suction nozzle of the chip mounter, wherein the distances between all the mounted components and different feed tanks are taken as input vectors of the quantum neural network, and all weighting values are set as small random numbers, and given input vectors and target output vectors of a training set are provided; and calculating overall optimal solution of the established mathematical modeling by adopting a three-layer quantum neural network algorithm, thus obtaining an optimized component mounting and dispatching scheme corresponding with the sum of the shortest mounting patches of all the components, the optimal mounting order of all the components, and the arrangement positions of feeders of the components in the feed tanks. The component mounting and dispatching optimization method constructs the component mounting and dispatching mathematical model which takes both the component mounting order and the feeder arrangement positions into consideration, obtains the optimal control on the mounting and dispatching of the components in the PCB, shortens the mounting time of single-end arch components, and enhances the mounting and production efficiency of the components of the chip mounter.

The invention discloses a multi-user orbital angular momentum multiplexing network system, comprising an Alice control terminal, an S-D type orbital angular momentum multiplexing unit and a Bob user terminal, wherein the Alice control terminal comprises a laser source, a polarization controller, an attenuator, a first non-equal arm M-Z interferometer and an orbital angular momentum multiplexing unit; the orbital angular momentum demultiplexing unit comprises a Dammam grating, a second collimator and a single-mode fiber; the Bob user terminal comprises N Bob users; the laser source generates a light signal, the light signal is transmitted to the first non-equal arm M-Z interferometer after entering the polarization controller and the attenuator and is sequentially transmitted to the orbital angular momentum multiplexing unit and the orbital angular momentum demultiplexing unit; and finally, the light signal enters the Bob users for detection. The multi-user orbital angular momentum multiplexing network system disclosed by the invention is used for achieving one-to-many communication of quantum network communication of a free space, individual users are relatively independent, and the user number can be expanded with the increase of the orbital angular momentum multiplexing, so that the expandability is good.

The invention discloses an identity authentication method during a quantum secret key application process. The identity authentication method includes the steps: a quantum network deployment phase, a preparation initial phase, a secret key preparation phase, an identity authentication phase and a secret key application phase. During an abstract extraction process, as the identity authentication method uses a quantum secret key and the quantum secret key is provided with true randomness, the difficulty for performing reverse operation on the abstract can be further reduced and the safety for information transmission can be improved; and at the same time, after accomplishment of one time of session identity authentication, only a device for identity authentication is allowed to apply for a secret key, so that the safety is further improved through verification of the device information, and during the process, a session ID is in continuous changing state and depends on a plurality of factors, so that a large amount of impersonation attack can be timely eliminated through verification of the session ID. For the identity authentication method during a quantum secret key application process, the secret key is applied to the quantum secret key application process to verify the legal identity between two parties for communication, so that verification of the legal identity of the opposite side between the two parties for communication can be realized and the required data for verification has absolute safety during the transmission process in the network.

The invention discloses a cloud storage method and system. At least one quantum key is generated through a quantum network by a QKD system at a terminal side and at least one QKD system at a cloud server side; and a cloud storage client side processes the at least one quantum key through a pre-set encryption algorithm so as to generate a combined key. By means of the method, a quantum key distribution technology and a cloud storage technology are combined; because natural advantages that a lot of random keys can be easily generated through distributed characteristics of cloud storage and quantum key distribution and the keys are difficultly eavesdropped are utilized, a malicious attacker cannot obtain the quantum keys, and cannot crack the combined key; and thus, the data security of cloud storage is greatly ensured.

The invention discloses a message authentication method based on a quantum key card, and a message authentication method. The message authentication system comprises a quantum network service stationconfigured at a network side and two clients configured at a user side to participate the message authentication, each client is configured with a quantum key card, two clients directly or indirectlyacquire a common key seed through the quantum network service station at the network side when performing the message authentication; two clients respectively generate message authentication codes byusing the owned common key seed in the corresponding quantum key card, and correspondingly implements message authentication at the user side. When two clients perform the message authentication, thecommon key seed is acquired through the quantum network service station at the network side, the generation and the comparison authentication of the message authentication code are performed at the user side, the security of the data transmission is guaranteed, and the consumption on the data processing resource at the network side is lowered.

The invention discloses a quantum key relay method which mainly solves the safety and efficiency problems of a quantum key trusted relay process in a quantum communication network. The method comprises the steps that quantum keys are cached in advance or negotiated in real time between adjacent quantum nodes, and the quantum nodes respond to a relay service request of a quantum network managementserver in real time; the quantum network management server selects a one-way concurrency relay method or a two-way concurrency relay method according to the relay routing table and the current state index of the related quantum node, and safely relays a key from the source node to the target node. According to the invention, the credibility requirement on the relay node can be reduced, the key relay efficiency is improved through concurrent response and a preferable relay mode, and the relay delay is reduced; the method and the system can be widely applied to quantum communication networks ofvarious topological structures, and have a good application prospect.

A networking method based on the large scale monatomic cavity quantum network. The flow includes: (1) building a quantum secret key distributing layer based on a monatomic cavity to form a quantum network; (2) building a model where a classical communication network and a quantum secret distributing layer are combined; (3) mapping quantum nodes and quantum link performance in the quantum secret key distributing layer on the corresponding classical network nodes and the classical link in the classical communication network through an uplink; (4) enabling the classical communication network to execute highest distributing efficiency routing algorithm; (5) transmitting acquired classical routing information to the quantum secret key distributing layer and assisting corresponding quantum nodes; (6) building the proper quantum route according to acquired classical information on the quantum secret key distributing layer according to obtained classical information; and (7) conducting following quantum secret key distributing operation after the quantum route is established. The networking method has the advantages of being simple in principle, convenient to operate, easy to achieve, wide in suitable range, capable of strengthening practicability and expandability of the quantum network and the like.

The invention discloses an application system based on quantum keys. The system comprises institution key management centers arranged at all institutions and used for providing unified quantum key services for application security and communication security, and a national key management center communicating with the institution key management centers of the institutions and responsible for distributing and sending the quantum keys or quantum key IDs for the institutions; and the two institution key management centers need to simultaneously initiate requests of obtaining the same quantum key to the national key management center. A barrier between an entity quantum network and a virtual application network is broken through, so that the high-security characteristics of the quantum keys arefurther extended to the service field, and further development of information security work is promoted; and by utilizing high security of the quantum network, the difficult problem of key distribution synchronization in the service field is solved, and the problems of the authority, credibility and security of key sources are solved, so that the confidentiality and the tamper-proofing performance of service information transmitted in an untrusted network are further guaranteed.

The invention provides a novel quantum broadcasting communication scheme. Only one difference from the transmitting party in the traditional quantum broadcasting protocol is as follows: the scheme realizes that two transmitting parties simultaneously transmit the united confidential information of the two parties to multiple legal receiving parties. In the scheme, the transmitting parties respectively share the multiparticle GHZ state with all the receiving parties, and then the transmitting parties carry out the single particle measurement and publish the check bit; after carrying out inaccurate Bell measurement, each receiving party simultaneously acquires the united confidential information of the transmitting parties according to the result and the check bit; the quantum characteristic ensures the unconditional safety of the protocol; and the application of the induced quantum photon leads the protocol to have detectability on bugging. The communication model can be applied to the fields of the safe democratic decision in a quantum network, the united signal control and the like. In the implementing process of the scheme, the transmitting party only needs to carry out single particle measurement, the receiving party carries out Bell measurement, but only partial Bell state measuring result needs to be distinguished, all the measuring results needs to be inaccurately distinguished, thus the scheme is easy to implement in the quantum network.

The invention relates to a time synchronization method in a quantum network. According to the method, a user emits signal photons to a server through the quantum network and records emitting time T1; the server receives the signal photons and records receiving time T2; the server emits the signal photons to the user and records emitting time T3; the user receives the signal photons emitted by the server and records receiving time T4; time delay of a relay station is recorded, so that time relay indeterminacy of the signal photons passing through the relay station can be eliminated, and therefore, time consumed by the emission of the signal photons from the user to the server through the relay station and by means of the quantum network and time consumed by the emission of the signal photons from the server to the user through the relay station can be identical, and the accuracy of time synchronization can be improved.

The invention discloses an identity authentication system based on a quantum network. The system comprises a user side A, a user side B, and a quantum network service station; the user side A appliesTGT and corresponding Ticket to the quantum network service station, and acquired Ticket is used for accessing the user side B; each user side is respectively configured with a quantum key card, a corresponding quantum key is stored between a quantum key card and the quantum network service station; and the configured quantum key card is used for performing identity authentication when the user side A is communicated with the quantum network service station and two user sides are communicated. The time stamp of the prior art is replaced by a quantum real random number, and the possibility of the replay attack is solved. The user side key is stored by using the quantum key card but not the user-side storage unit; the quantum key card is independent hardware equipment, and the possibility ofstealing the key by malicious software or malicious operation is greatly reduced. The key can be frequently changed, and the security is greatly improved.

The invention relates to the technical field of the quantum communication, and especially a method for encrypting and decrypting information based on a quantum network. The invention aims at providinga method for encrypting and decrypting the information based on the quantum network, and the method is simple in step and high in safety guarantee; a sender performs encryption through a quantum keyK and edited information M to form information M'K, and then encrypts the quantum key K by using an encryption public key Ka to form a ciphertext key K'Ka, and finally combines the ciphertext key K'Kawith the information M'K to form the information E to send out; a receiver firstly acquires a decryption private key Kb by using a U key, and then performs the identity authentication, and decrypts the encrypted information through the decryption private key Kb when the identity authentication is qualified, thereby guaranteeing that only the personnel successfully passing the identity authentication can decrypt the encrypted information and read the content in the information, and the information security is improved.

The invention provides a quantum key distribution method and device, and belongs to the technical field of safety communication. The quantum key distribution method is applied to sending end equipment, and comprises the following steps: preprocessing original session key information, and splitting the original session key information into n pieces of sub-session key information; sending the n pieces of sub-session key information through m paths which are not intersected; wherein n and m are integers greater than 1. The quantum key distribution method is applied to receiving end equipment, andcomprises the following steps: respectively receiving n pieces of sub-session key information through m paths which are not intersected; and obtaining original session key information according to the n pieces of sub-session key information. By means of the technical scheme, the problem that traditional quantum secret communication excessively depends on credible relay safety can be solved, and the fault tolerance and usability of a quantum network are effectively improved.

The present invention discloses a quantum network system based on plug-and-play MDI-QKD. The quantum network system comprises a server and a user terminal connected with the server. The server comprises a quantum switch, a Bell state measuring device and a switch module. The switch module and the Bell state measuring device are connected with the quantum switch through the polarization beam splitter. The client includes a plurality of Alice nodes; the quantum switch comprises a control layer and a transport layer. The transport layer comprises a quantum transmission link and an optical cross-connection network bidirectionally connected with the quantum transmission link. The control layer is located in the upper layer, the transport layer is located in the lower layer, and the control layer is bidirectionally connected with the transport layer module through the optical cross-connect network. The invention has the characteristics of simple configuration of the user node in the network,improves the security of the star topology network and increases the MDI-QKDlegal communication user.