CN115333641A - Monitoring system and method for on-site monitoring by using same - Google Patents
Monitoring system and method for on-site monitoring by using same Download PDFInfo
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- CN115333641A CN115333641A CN202210778792.XA CN202210778792A CN115333641A CN 115333641 A CN115333641 A CN 115333641A CN 202210778792 A CN202210778792 A CN 202210778792A CN 115333641 A CN115333641 A CN 115333641A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/70—Photonic quantum communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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- H04B10/516—Details of coding or modulation
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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Abstract
The invention provides a monitoring system, comprising: the image acquisition assembly is configured to acquire images of an application site in real time, screen the images acquired in real time and output image data to be transmitted; the sending component is connected with the image acquisition component and is configured to encode the image data to be transmitted on a quantum state, generate quantum light pulse and transmit the quantum light pulse; a receiving component configured to receive the quantum light pulse, decode information carried by the quantum light pulse, and convert the information into image data; a quantum channel connecting the sending component and the receiving component, configured to transmit the quantum light pulse through the quantum channel. The monitoring system further encodes the encoded frame data to a quantum state, and transmits the encoded frame data by sending quantum light pulses. The safety of the quantum channel can be realized by sharing measurement basis vector and position information by two parties transmitting information, and the higher-level index requirements of the video monitoring system are met.
Description
Technical Field
The invention relates to the technical field of quantum secure direct communication, in particular to a monitoring system and a method for carrying out field monitoring by using the monitoring system.
Background
Quantum direct communication was proposed in 2000, and its development has gone through the following four stages: (1) In 2000-2004, a basic concept and theory are established, and typical quantum direct communication protocols such as an entanglement-based high-efficiency protocol, an entanglement-based two-step protocol, a single-photon-based DL04 protocol and the like are provided at this stage; (2) In 2005-2015, a large number of theoretical protocols were proposed in the development protocol and application exploration stage, and the possible application of quantum direct communication was widely explored; (3) In 2016-2019, a principle experiment verification and prototype development stage, wherein a quantum direct communication scheme based on an entangled quantum direct communication protocol and a single photon is verified experimentally; (4) until 2020, product development and practicability are promoted. The typical performance of the communication prototype at this stage is 10km @4kbps, the real-time safe transmission of texts, pictures and voice files can be realized, the quantum direct communication of 100km can be realized by utilizing the low-loss optical fiber, the development of the quantum secure direct communication prototype lays a foundation for a quantum secure direct communication network, and the development of the scheme of the component parts of the quantum secure direct communication network is promoted.
Disclosure of Invention
In view of at least one of the deficiencies of the prior art, the present invention provides a monitoring system comprising:
the image acquisition component is configured to acquire images of an application site in real time, screen the images acquired in real time and output image data to be transmitted;
the sending component is connected with the image acquisition component and is configured to encode the image data to be transmitted on a quantum state, generate quantum light pulse and transmit the quantum light pulse;
a receiving component configured to receive the quantum light pulse, decode information carried by the quantum light pulse, and convert the information into image data;
a quantum channel connecting the sending component and the receiving component, configured to transmit the quantum light pulse through the quantum channel.
According to an aspect of the invention, wherein the image acquisition assembly further comprises:
the image acquisition device is configured to acquire images of an application field in real time;
the image identification module is connected with the image acquisition equipment, and is configured to identify and output image frame data including a preset sample in an image acquired in real time;
and the feature extraction module is connected with the image identification module and is configured to perform feature extraction on the image frame data comprising the preset sample, screen multi-frame image data with a change of the feature value smaller than a preset value and output the image data to be transmitted.
According to an aspect of the invention, the monitoring system further comprises:
and the cloud monitoring component is connected with the receiving component and is configured to store the image data.
According to an aspect of the invention, wherein the sending component further comprises:
the storage module is connected with the image acquisition assembly and is configured to receive the image data to be transmitted and sequentially store and forward the image data according to a receiving sequence;
the error correction coding module is connected with the storage module and is configured to add check bits into the image data to be transmitted to form first error correction data;
the encryption coding module is connected with the error correction coding module and is configured to encrypt the first error correction data according to a preset secret key to form first encrypted data;
a quantum state encoding module, connected to the encryption encoding module, configured to encode the first encrypted data on a quantum state;
a transmitting module connected with the quantum state encoding module and configured to transmit quantum light pulses carrying the first encrypted data;
a first communication module configured to send a measurement basis vector and position information at the same time or after the transmission module transmits the quantum light pulse.
According to an aspect of the invention, wherein the receiving component further comprises:
a receiving module configured to receive a quantum light pulse and measure a quantum state encoding of the quantum light pulse;
the quantum state decoding module is connected with the receiving module and configured to decode according to the quantum state codes of the quantum light pulses to obtain second encrypted data;
the encryption and decoding module is connected with the quantum state decoding module and configured to decrypt the second encrypted data according to the preset secret key to obtain second error correction data;
the error correction decoding module is connected with the encryption decoding module and is configured to restore the second error correction data into image data through forward error correction;
and the second communication module is configured to receive the measurement basis vectors and the position information sent by the first communication module and perform security monitoring on the quantum channel.
According to an aspect of the invention, wherein the transmitting module further comprises:
a laser configured to emit a quantum light pulse;
and the modulation device is arranged on the downstream of the optical path of the laser, is connected with the quantum state encoding module, and is configured to modulate the phase of the quantum optical pulse according to the quantum state encoding output by the quantum state encoding module.
According to an aspect of the invention, wherein the receiving module further comprises:
an interferometer configured to receive the quantum light pulses and to perform phase matching;
and the single-photon detector is arranged on the optical path downstream of the interferometer and is configured to receive the optical signal output by the interferometer and convert the optical signal into an electric signal so as to output the quantum state code.
According to an aspect of the invention, wherein each of the quantum light pulses comprises a single photon or one weak coherent light pulse, each of the quantum light pulses carrying 2 bits of information, the transmitting module is further configured to:
the quantum light pulses of each emission carry a frame of the first encrypted data.
According to one aspect of the invention, wherein the measurement basis vectors and position information are transmitted over a classical channel.
The present invention also provides a method of on-site monitoring using a monitoring system as described above, comprising:
acquiring images of an application site in real time through the image acquisition assembly, screening the images acquired in real time, and outputting image data to be transmitted;
encoding the image data to be transmitted on a quantum state through the sending component, generating a quantum light pulse and transmitting the quantum light pulse;
and receiving the quantum light pulse through the receiving component, decoding the information carried by the quantum light pulse, and converting the information into image data.
The monitoring system and the method for on-site monitoring by using the same provided by the invention are used for receiving, identifying, screening, storing and forwarding the transmitted image data frames, carrying out error correction coding and encryption coding on each frame of data, further coding the coded frame of data to a quantum state, and transmitting by sending quantum light pulses. The safety of the quantum channel can be realized by sharing the measurement basis vector and the position information by two parties of information transmission, the safety and the reliability of the transmission channel are guaranteed, and the higher-level index requirements of a video monitoring system are met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without exceeding the protection scope of the present application.
FIG. 1 illustrates a monitoring system provided by one embodiment of the present invention;
FIG. 2 illustrates an image acquisition assembly of a monitoring system provided by one embodiment of the present invention;
FIG. 3 illustrates a monitoring system provided by one embodiment of the present invention;
FIG. 4 illustrates a sending component of a monitoring system provided by one embodiment of the invention;
FIG. 5 illustrates a receiving component of a monitoring system provided by an embodiment of the invention;
FIG. 6 illustrates a transmit module in a transmit component of a monitoring system provided by one embodiment of the present invention;
FIG. 7 illustrates a receiving module in a receiving component of a monitoring system provided by an embodiment of the invention;
fig. 8 illustrates a method for performing on-site monitoring using a monitoring system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the description of the embodiments is only intended to facilitate the understanding of the methods and their core concepts of the present application. Meanwhile, a person skilled in the art should, according to the idea of the present application, change or modify the embodiments and applications of the present application based on the scope of the present application. In view of the above, the description should not be taken as limiting the application.
The existing video monitoring system based on the Ethernet has the following technical defects: 1. the image information data collected by the monitoring system has potential safety hazards in the transmission process of the Ethernet network line, and information leakage is easily caused; 2. the ethernet network line does not have the eavesdropping sensing function, which may cause the image information data to be intercepted, eavesdropped or tampered. The invention provides a scheme for integrating a quantum direct communication technology into a video monitoring system.
The method comprises the steps of receiving, identifying, screening, storing and forwarding image information data frames required by a video monitoring system, carrying out error correction coding and encryption coding on each frame of data, further coding the coded frame of data to a quantum state, and transmitting by sending quantum light pulses. The safety of the quantum channel can be realized by sharing measurement basis vector and position information by a receiving end and a sending end of transmission information, the safety and the reliability of the transmission channel are guaranteed, and a video monitoring scene with higher requirement on safety performance is met.
According to one embodiment of the present invention, as shown in FIG. 1, the present invention provides a monitoring system 100 comprising an image acquisition component 110, a transmission component 120, a reception component 130, and a quantum channel 140. Wherein:
the image acquisition component 110 is configured to acquire images of an application site in real time, and screen out image data to be transmitted from the images acquired in real time and output the image data.
Optionally, as shown in fig. 2, the image acquisition component 110 includes an image acquisition device 111, an image recognition module 112, a feature extraction module 113, and a timing module 114. Wherein:
the image capture device 111 includes one or more of a camera, a radar, a structured light sensor. The image capturing device 111 is configured to capture images of a monitored site in real time, for example: under the control of the timing module 114, the camera takes pictures of the monitored site at preset time intervals (for example, at intervals of 1 second) and outputs the pictures. For another example, a camera captures a video image of an application site, and image data of a current frame is output at preset time intervals (e.g., at 1 second intervals). For another example, the radar or other sensor performs one scan at preset time intervals (e.g., at intervals of 1 second) and outputs the scan result.
The image recognition module 112 is connected to the image capturing device 111, and is configured to perform intra-frame recognition on image data received at preset time intervals, detect whether a preset sample, such as a mortgage, cash, a check, a financial deposit card, or the like, is included in the current frame image data, and retain image frame data including the preset sample.
The feature extraction module 113 is connected to the image recognition module 112, and is configured to sort the retained image frames including the preset samples according to an image acquisition order, perform feature extraction on each image frame, compare changes of feature values between adjacent frames, and retain only one image frame (such as a start frame or an intermediate frame) for a plurality of image frames of which the change of feature values is smaller than a preset value. The image frame data processed by the feature extraction module 113 is output as image data to be transmitted.
As shown in fig. 1, the sending component 120 is connected to the image capturing component 110, and is configured to encode image data to be transmitted on quantum states, generate quantum light pulses, and transmit the quantum light pulses. Optionally, the sending component 120 performs error correction and encryption processing on each frame of image data after receiving the image data to be transmitted, encodes the processed frame data in a quantum state, and converts the encoded frame data into a quantum light pulse for transmission, where the quantum state of the quantum light pulse carries the processed frame data information.
Receiving component 130 is configured to receive the quantum light pulses and decode and convert information carried by the quantum light pulses into image data. Optionally, the receiving component 130 receives the quantum light pulse and measures the quantum state of the quantum light pulse, and obtains the data information carried by the quantum light pulse according to the quantum state of the quantum light pulse. The receiving component 130 decodes the data information, including decryption processing, forward error correction processing, and restores the data information to one or more frames of image data.
A quantum channel 140 connects the transmitting component 120 and the receiving component 130, and is configured to transmit the quantum light pulse through the quantum channel 140. The quantum channel 140 comprises an optical fiber, the quantum channel 140 may share the optical fiber with the classical channel, but the mechanism for transmitting information in the quantum channel 140 is different from that in the classical channel.
According to an embodiment of the present invention, as shown in fig. 3, the monitoring system 100 provided by the present invention further includes: cloud monitoring component 150. Wherein:
the cloud monitoring component 150 is connected to the receiving component 130 and configured to store one or more frames of image data transmitted through the quantum channel 140.
Optionally, the cloud monitoring component 150 includes one or more of a monitoring computer, a data storage center, and a cloud encryption storage device. One or more frames of image data transmitted through the quantum channel 140 fall to the ground and are backed up in the monitoring computer, and then the monitoring computer encrypts and packages the one or more frames of image data and sends the one or more frames of image data to the data storage center or the cloud encryption storage device.
According to an embodiment of the present invention, the image capturing component 110 is disposed at an application site that needs to be monitored, the sending component 120 is disposed in a machine room in or near the application site, and the receiving component 130 and the monitoring computer are disposed in a monitoring machine room, where the monitoring machine room is used for performing video monitoring on one or more application sites, that is, receiving and storing monitoring image frame data captured at one or more application sites.
According to an embodiment of the present invention, as shown in fig. 4, wherein the sending component 120 further comprises: the device comprises a storage module 121, an error correction coding module 122, an encryption coding module 123, a quantum state coding module 124, a transmitting module 125 and a first communication module 126. Wherein:
the storage module 121 is connected to the image acquisition component 110, and is configured to receive the image data to be transmitted, and store and forward the image data frame by frame according to a receiving sequence. Because the quantum state encoding module 124 and the transmitting module 125 require a certain initialization time, the image data to be transmitted output by the image acquisition component 110 is first received and stored by the storage module 121, and is forwarded according to a first-in first-out (FIFO) sequence after the initialization of the quantum state encoding module 124 and the transmitting module 125 is completed.
The error correction coding module 122 is connected to the storage module 121, and configured to receive the image data and add a check bit to each frame of image data to form first error correction data. The error correction coding module 122 performs data padding on each frame of image data, for example: a cyclic redundancy code is added to each frame of image data to form a complete frame of encoded data (i.e., first error correction data).
The encryption and coding module 123 is connected to the error correction and coding module 122, and is configured to encrypt the first error correction data according to a preset key to form first encrypted data. Optionally, the machine room located at the application site and the monitoring machine room located at the remote end share a preset secret key in advance, the first error correction data is encrypted through the preset secret key to form first encrypted data, and information safety is further guaranteed in transmission.
The quantum state encoding module 124 is connected to the encryption encoding module 123 and configured to encode the first encrypted data on a quantum state to carry the first encrypted data by a phase of a quantum light pulse. The quantum state encoding module 124 encodes the first encrypted data on a quantum state according to a phase encoding protocol of quantum direct communication, so that a quantum optical pulse carries the first encrypted data. Wherein each quantum light pulse comprises a single photon or a weakly coherent light pulse, each quantum light pulse having four quantum states, each quantum light pulse carrying 2 bits of information.
The transmitting module 125 is connected to the quantum state encoding module 124 and configured to transmit quantum light pulses carrying the first encrypted data. Optionally, the emission module 125 includes a laser and a modulation device, wherein the laser is configured to emit laser pulses and may attenuate the emitted pulses to a single photon level by an attenuator; the modulation device is disposed on the optical path downstream of the laser, and is connected to the quantum state encoding module 124, and performs phase modulation on the laser pulse according to the quantum state encoding output by the quantum state encoding module 124, so that the laser pulse becomes a quantum optical pulse carrying the first encrypted data.
The first communication module 126 is configured to: the measurement basis vector and position information are sent at the same time or after the transmission module 125 transmits the quantum light pulse. The quantum light pulse carries the first encrypted data through a quantum state, and if the first encrypted data is intercepted or measured by an eavesdropper midway, the quantum state of the quantum light pulse collapses. The first communication module 126 sends the measurement basis vector and the position information, optionally sends the measurement basis vector and the position information corresponding to one frame of encoded data through the first communication module 126, and detects the measured error rate through the measurement basis vector and the position information, so that whether the quantum optical pulse is measured in the transmission process can be determined, and the security of the quantum channel 140 can be further confirmed.
Optionally, the storage module 121, the error correction coding module 122, the encryption coding module 123, the quantum state coding module 124, the transmitting module 125, and the first communication module 126 are integrated in a quantum direct communication device (QSDC) of an application site room.
According to an embodiment of the present invention, as shown in fig. 5, wherein the receiving component 130 further comprises: a receiving module 131, a quantum state decoding module 132, an encryption decoding module 133, an error correction decoding module 134, and a second communication module 135. Wherein:
the receiving module 131 is configured to receive quantum light pulses and measure the quantum states of the quantum light pulses. Optionally, the receiving module 131 includes an interferometer and a single-photon detector, and after a quantum light pulse transmitted through the quantum channel 140 reaches the receiving module 131, phase matching is performed through the interferometer first, then optical signal detection is performed through the single-photon detector, and phase information of the optical signal is converted into an electrical signal to be output, so as to obtain quantum state encoding information of the quantum light pulse.
The quantum state decoding module 132 is connected to the receiving module 131, and configured to decode according to the quantum state encoding information of the quantum light pulse, and obtain second encrypted data. The quantum state of the quantum optical pulse carries the first encrypted data, but during the transmission of the quantum optical pulse, the loss of the quantum optical pulse may be caused by the loss of the quantum channel 140, and the second encrypted data is obtained by decoding the quantum state encoded information of the received quantum optical pulse, and the second encrypted data may be different from the first encrypted data.
The encryption and decoding module 133 is connected to the quantum state decoding module 132, and is configured to decrypt the second encrypted data according to the preset key to obtain second error correction data. Optionally, the sending component 120 of the application site machine room and the receiving component 130 of the monitoring machine room share the preset key in advance, and after receiving the information carried by the quantum optical pulse and performing quantum state decoding, decryption is performed through the preset key (that is, the inverse operation of the encryption and coding module 123 is performed).
The error correction decoding module 134 is connected to the encryption decoding module 133, and restores the second error correction data to the image frame data through forward error correction. The second error correction data is frame data with a certain error rate, and the error correction decoding module 134 includes a forward error correction decoder, through which the original image frame data can be restored after error correction.
The second communication module 135 is configured to receive the measurement basis vectors and the position information sent by the first communication module 126, and perform channel security monitoring. Optionally, the second communication module 135 establishes a connection with the first communication module 126 through a classical channel, and the second communication module 135 receives the measurement basis vector and the position information sent by the first communication module 126 through the classical channel, and completes a basis according to the measurement basis vector and the position information to detect the transmission security of the quantum channel 140. If the measured error rate obtained according to the measured basis vector and the position information is higher than 50%, the quantum channel 140 is judged to be intercepted, and the transmitted quantum optical pulse is discarded or the quantum channel is switched in the next information transmission.
Optionally, the receiving module 131, the quantum state decoding module 132, the encryption decoding module 133, the error correction decoding module 134, and the second communication module 135 are integrated in a quantum direct communication device (QSDC) of the monitoring room.
According to an embodiment of the present invention, in the monitoring system 100, the first error correction data generated by encoding by the transmitting component 120 is the same as or different from the second error correction data generated by decoding by the receiving component 130, and the first encrypted data generated by encoding by the transmitting component 120 is the same as or different from the second encrypted data generated by decoding by the receiving component 130. Due to the possible loss and interference of the quantum channel 140, the optical pulse may be lost during the transmission of the quantum optical pulse in the quantum channel 140, so that the second encrypted data received by the receiving module 131 and decoded by the quantum state decoding module 132 is different from the first encrypted data generated after the encryption by the encryption and encoding module 123, further, the second error correction data obtained after the decryption of the second encrypted data by the encryption and decoding module 133 is also different from the first error correction data generated after the error correction encoding by the error correction encoding module 122, but the second error correction data includes check bit information, and therefore, the error correction decoding module 134 (including a forward error correction decoder) performs forward error correction restoration, and the original image frame data can be obtained.
According to an embodiment of the present invention, wherein the error correction coding module 122 in the sending component 120 is further configured to: a cyclic redundancy code is added to the original image frame data. Accordingly, the error correction decoding module 134 in the receiving component 130 restores the original image frame data through forward error correction.
According to an embodiment of the present invention, as shown in fig. 6, the transmitting module 125 in the transmitting component 120 further includes:
a laser 1251 configured to emit a laser pulse;
and a modulation device 1252 disposed downstream of the laser 1251 in the optical path, connected to the quantum state encoding module 124, and configured to perform phase modulation on the laser pulses according to the quantum state encoding output by the quantum state encoding module 124, so that the laser pulses form quantum light pulses carrying the first encrypted data.
According to an embodiment of the present invention, as shown in fig. 7, the receiving module 131 in the receiving component 130 further includes:
an interferometer 1311 configured to receive the quantum light pulses and phase match the quantum light pulses;
a single photon detector 1312, disposed downstream in the optical path of the interferometer 1311, is configured to receive the phase-matched quantum light pulse and convert the optical signal into an electrical signal to output quantum state encoded information of the quantum light pulse. Optionally, the quantum state encoded information is output to quantum state decoding module 132.
According to an embodiment of the present invention, wherein each of the quantum light pulses comprises a single photon or a weak coherent light pulse, the quantum light pulses carrying 2-bit information, the transmitting module 125 in the transmitting component 120 is further configured to:
the quantum light pulse of each emission carries a frame of the encrypted data. I.e. each time the transmitted quantum light pulse carries a frame of encoded data.
According to an embodiment of the present invention, as shown in fig. 8, the present invention further provides a method 10 for on-site monitoring using the monitoring system as described above, including steps S101 to S103. Wherein:
in step S101, images of a monitoring site are acquired in real time by the image acquisition component, and image data to be transmitted is screened out from the images acquired in real time and output;
in step S102, encoding the image data to be transmitted on a quantum state by the sending component, generating a quantum light pulse, and transmitting the quantum light pulse;
in step S103, the quantum light pulse is received by the receiving component, and information carried by the quantum light pulse is decoded and converted into image data.
The monitoring system and the method for on-site monitoring by using the monitoring system provided by the invention receive, identify, screen, store and forward the transmission image data frames, carry out error correction coding and encryption coding on each frame of data, further code the coded frame of data to a quantum state, and transmit by sending quantum light pulse. The security of the quantum channel is ensured by the quantum physics principle, and compared with a video monitoring system and a monitoring method in a classical mode, the video monitoring system and the monitoring method have the eavesdropping sensing capability, avoid the leakage risk of image data, and greatly improve the security of the video monitoring system.
Claims (10)
1. A monitoring system, comprising:
the image acquisition component is configured to acquire images of an application site in real time, screen the images acquired in real time and output image data to be transmitted;
the sending component is connected with the image acquisition component and is configured to encode the image data to be transmitted on a quantum state, generate quantum light pulse and transmit the quantum light pulse;
a receiving component configured to receive the quantum light pulse, decode information carried by the quantum light pulse, and convert the information into image data;
a quantum channel connecting the sending component and the receiving component, configured to transmit the quantum light pulse through the quantum channel.
2. A monitoring system in accordance with claim 1 wherein said image acquisition assembly further comprises:
the image acquisition device is configured to acquire images of an application field in real time;
the image identification module is connected with the image acquisition equipment, and is configured to identify and output image frame data including a preset sample in an image acquired in real time;
and the feature extraction module is connected with the image identification module and is configured to perform feature extraction on the image frame data comprising the preset sample, screen multi-frame image data with a change of the feature value smaller than a preset value and output the image data to be transmitted.
3. The monitoring system of claim 1 or 2, further comprising:
and the cloud monitoring component is connected with the receiving component and is configured to store the image data.
4. The monitoring system of claim 1 or 2, wherein the sending component further comprises:
the storage module is connected with the image acquisition assembly and is configured to receive the image data to be transmitted and sequentially store and forward the image data according to a receiving sequence;
the error correction coding module is connected with the storage module and is configured to add check bits into the image data to be transmitted to form first error correction data;
the encryption coding module is connected with the error correction coding module and is configured to encrypt the first error correction data according to a preset secret key to form first encrypted data;
a quantum state encoding module, coupled to the encryption encoding module, configured to encode the first encrypted data on quantum states;
a transmitting module connected with the quantum state encoding module and configured to transmit quantum light pulses carrying the first encrypted data;
a first communication module configured to send measurement basis vectors and position information at the same time or after the transmission module transmits the quantum light pulse.
5. The monitoring system of claim 4, wherein the receiving component further comprises:
a receiving module configured to receive a quantum light pulse and measure a quantum state encoding of the quantum light pulse;
the quantum state decoding module is connected with the receiving module and configured to decode according to the quantum state codes of the quantum light pulses to obtain second encrypted data;
the encryption and decoding module is connected with the quantum state decoding module and configured to decrypt the second encrypted data according to the preset secret key to obtain second error correction data;
the error correction decoding module is connected with the encryption decoding module and is configured to restore the second error correction data into image data through forward error correction;
and the second communication module is configured to receive the measurement basis vectors and the position information sent by the first communication module and perform security monitoring on the quantum channel.
6. The monitoring system of claim 4, wherein the transmitting module further comprises:
a laser configured to emit a quantum light pulse;
and the modulation device is arranged on the optical path downstream of the laser, is connected with the quantum state encoding module, and is configured to modulate the phase of the quantum optical pulse according to the quantum state encoding output by the quantum state encoding module.
7. The monitoring system of claim 5, wherein the receiving module further comprises:
an interferometer configured to receive the quantum light pulses and to perform phase matching;
and the single photon detector is arranged on the downstream of the optical path of the interferometer and is configured to receive the optical signal output by the interferometer and convert the optical signal into an electric signal so as to output the quantum state code.
8. The monitoring system of claim 4, wherein each of the quantum light pulses comprises a single photon or one weakly coherent light pulse, each of the quantum light pulses carrying 2-bit information, the transmitting module further configured to:
the quantum light pulse of each emission carries a frame of the first encrypted data.
9. A monitoring system in accordance with claim 4 wherein the measurement basis vectors and position information are transmitted over a classical channel.
10. A method of on-site monitoring using the monitoring system of any one of claims 1-9, comprising:
acquiring images of an application site in real time through the image acquisition assembly, screening the images acquired in real time, and outputting image data to be transmitted;
encoding the image data to be transmitted on a quantum state through the sending component, generating a quantum light pulse and transmitting the quantum light pulse;
and receiving the quantum light pulse through the receiving component, decoding information carried by the quantum light pulse, and converting the information into image data.
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| CN114244507A (en) * | 2021-12-15 | 2022-03-25 | 北京量子信息科学研究院 | Quantum direct communication method, device, equipment and system based on single-path transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111898416A (en) * | 2020-06-17 | 2020-11-06 | 绍兴埃瓦科技有限公司 | Video stream processing method and device, computer equipment and storage medium |
| CN114244507A (en) * | 2021-12-15 | 2022-03-25 | 北京量子信息科学研究院 | Quantum direct communication method, device, equipment and system based on single-path transmission |
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Inventor after: Chen Xiuwei Inventor after: Long Guilu Inventor after: Wang Min Inventor after: Guo Jianxing Inventor after: Niu Penghao Inventor after: Zhang Chunsheng Inventor after: Zhang Wei Inventor after: Pan Dong Inventor after: Song Xiaotian Inventor before: Long Guilu Inventor before: Chen Xiuwei Inventor before: Wang Min Inventor before: Guo Jianxing Inventor before: Niu Penghao Inventor before: Zhang Chunsheng Inventor before: Zhang Wei Inventor before: Pan Dong Inventor before: Song Xiaotian |