Public security cooperation police service system based on quantum communication

Abstract

The utility model discloses a public security cooperation police service system based on quantum communication. The public security cooperation police service system comprises a classic police service system center, a quantum key management cloud platform and a plurality of local public security user terminals. The quantum key management cloud platform comprises a quantum key detection end and a detection result sending end; the local public security user side comprises a local police service subsystem and a quantum key sending end; the classical police service system center is respectively connected with the quantum key detection end and the local police service subsystem, the quantum key sending end is connected with the quantum key detection end, the quantum key detection end is connected with the detection result sending end, and the detection result sending end is connected with the local police service subsystem. The utility model discloses a public security cooperation police service system based on quantum communication, and the communication safety of the police service system is improved through the tight combination of the police service system and the quantum communication. And the method can be compatible with an existing optical fiber network, so that the method is easier to deploy and use in an actual scene.

Description

TECHNICAL FIELD

[0001] The utility model relates to quantum communication network and information security technical field, concretely relates to a kind of public security cooperative police system based on quantum communication. BACKGROUND

[0002] At present, the classical cryptosystem is subjected to the impact from quantum computing, and quantum computing enables computers to perform calculations in a more efficient manner than traditional computers, thereby threatening the classical cryptosystem. The quantum key distribution (QKD) protocol is based on the basic principles of quantum mechanics and has higher security than classical communication. The QKD technology can ensure the secure exchange of keys between two remote parties. Although it has been theoretically proven that the QKD technology is unconditionally secure, it is still difficult to ensure the security of the communication system when it is implemented in actual devices, because various device defects still need to be considered.

[0003] The twin-field quantum key distribution (TF-QKD) protocol can well avoid all vulnerabilities of the measurement end of the QKD system. Since the TF-QKD was proposed, many achievements have been made in theory and experiment, and it can already be used in communication scenarios with long-distance requirements. The TF-QKD protocol has a higher key generation rate and a longer secure distance, which makes it more practical and feasible in real-world scenarios. In addition, the TF-QKD is compatible with existing optical fiber networks, which makes it easier to deploy and use in actual scenarios, further improving the practicality of the quantum communication system.

[0004] The police system is an important tool for maintaining social order and ensuring people's safety. It involves various aspects of police work, including daily patrols, case handling, community policing, etc. It is of great significance to social order, people's safety and national security. It is not only an important force to combat crime and maintain social stability, but also an important guarantee for national security. In a complex social environment, the police system needs to collect and analyze a large amount of intelligence information, especially to prevent information leakage and tampering.

[0005] However, there is currently no solution to apply quantum communication technology to the police system, and only relying on the classical cryptosystem, the communication security of the police system cannot be guaranteed. UTILITY MODEL CONTENT

[0006] The utility model proposes a public security cooperative police system based on quantum communication to solve the problem that the communication security of the current police system cannot be guaranteed.

[0007] In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

[0008] A public security cooperation police system based on quantum communication, comprising a classical police system center, a quantum key management cloud platform and a plurality of local public security user terminals;

[0009] The quantum key management cloud platform comprises a quantum key detection end and a detection result sending end;

[0010] The local public security user terminal comprises a local police subsystem and a quantum key sending end;

[0011] The classical police system center is connected with the quantum key detection end and the local police subsystem respectively, the quantum key sending end is connected with the quantum key detection end, the quantum key detection end is connected with the detection result sending end, and the detection result sending end is connected with the local police subsystem.

[0012] In the above scheme, the police system and quantum communication are closely combined to improve the communication security of the police system, and the existing optical fiber network is compatible, so that it is easier to deploy and use in actual scenes.

[0013] Preferably, it further comprises a Dammam grating;

[0014] The quantum key sending end is connected with the quantum key detection end through the Dammam grating.

[0015] Preferably, the Dammam grating is a one-dimensional Dammam grating, a two-dimensional Dammam grating or a three-dimensional Dammam grating.

[0016] Preferably, the quantum key management cloud platform further comprises a quantum gateway;

[0017] The quantum gateway is connected with the classical police system center and the quantum key detection end respectively.

[0018] Preferably, the quantum key sending end comprises a laser light source, an intensity modulator, a phase modulator, a spatial light modulator and an adjustable optical attenuator connected in sequence;

[0019] The output end of the adjustable optical attenuator is connected with the quantum key detection end through the Dammam grating.

[0020] In the above scheme, by adopting the double-field quantum key distribution technology, the key generation rate is higher and the security distance is longer.

[0021] Preferably, the quantum key sending end further comprises a random number generator;

[0022] The output end of the random number generator is connected with the input end of the intensity modulator and the input end of the phase modulator respectively.

[0023] Preferably, the quantum key detection end comprises a beam splitter, a first single-photon detector and a second single-photon detector.

[0024] The output end of the adjustable optical attenuator is connected with the input end of the beam splitter through a Dammann grating, the output ends of the beam splitter are connected with the input ends of the first single-photon detector and the second single-photon detector respectively, and the output ends of the first single-photon detector and the second single-photon detector are connected with the detection result sending end respectively.

[0025] Preferably, the local police subsystem is connected with the classical police system center through a classical channel.

[0026] Preferably, the local police subsystem is connected with the quantum gateway through a classical channel.

[0027] Preferably, the quantum key management cloud platform further comprises a quantum data management module.

[0028] The quantum data management module is connected with the quantum key detection end.

[0029] The beneficial technical effects of the utility model are as follows:

[0030] The utility model discloses a public security cooperation police system based on quantum communication, closely combine police system and quantum communication, improve the communication security of police system, and can be compatible with the existing fiber network, so it is easier to deploy and use in the actual scene. DRAWINGS

[0031] Fig. 1 It is the overall structure diagram of the utility model;

[0032] Fig. 2 It is the module connection schematic view of quantum key sending end in the utility model;

[0033] Fig. 3 It is the structure schematic view of quantum key detection end in the utility model;

[0034] Among them: 100, classical police system center;200, quantum key management cloud platform;210, quantum key detection end;211, beam splitter;212, first single-photon detector;213, second single-photon detector;220, detection result sending end;230, quantum gateway;240, quantum data management module;300, local public security user end;310, local police subsystem;320, quantum key sending end;321, laser light source;322, intensity modulator;323, phase modulator;324, spatial light modulator;325, adjustable optical attenuator;326, random number generator;400, Dammann grating. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will make further detailed description to the utility model combining with examples, but the scope of protection of the utility model is not limited to the following specific examples.

[0036] Example 1

[0037] As Figs. 1-3 shown, a public security cooperative police system based on quantum communication includes a classical police system center 100, a quantum key management cloud platform 200 and a plurality of local public security user terminals 300;

[0038] The quantum key management cloud platform 200 includes a quantum key detection end 210 and a detection result sending end 220;

[0039] The local public security user terminal 300 includes a local police subsystem 310 and a quantum key sending end 320;

[0040] The classical police system center 100 is connected with the quantum key detection end 210 and the local police subsystem 310 respectively, the quantum key sending end 320 is connected with the quantum key detection end 210, the quantum key detection end 210 is connected with the detection result sending end 220, and the detection result sending end 220 is connected with the local police subsystem 310.

[0041] In the specific implementation process, the police system and quantum communication are closely combined to improve the communication security of the police system, and the existing optical fiber network is compatible, so it is easier to deploy and use in actual scenes.

[0042] More specifically, the quantum key sending end 320 includes a laser light source 321, an intensity modulator 322, a phase modulator 323, a spatial light modulator 324 and an adjustable optical attenuator 325 connected in sequence;

[0043] The output end of the adjustable optical attenuator 325 is connected with the quantum key detection end 210 through a Dammann grating 400.

[0044] More specifically, the quantum key sending end 320 further includes a random number generator 326;

[0045] The output end of the random number generator 326 is connected with the input end of the intensity modulator 322 and the input end of the phase modulator 323 respectively.

[0046] In the specific implementation process, the laser emitted by the laser source 321 is subjected to intensity modulation by the intensity modulator 322, and then subjected to phase modulation by the phase modulator 323, wherein the modulation coefficient is determined by the random number generator 326; finally, the modulated signal light is processed by the adjustable optical attenuator 325 to attenuate the signal light to the single-photon level, and enters the quantum key detection end 210 in the quantum key management cloud platform 200 through the Dammam grating 400 for detection. By adopting the double-field quantum key distribution technology, the key generation rate is higher and the security distance is longer.

[0047] More specifically, the Dammam grating 400 is further included;

[0048] The quantum key sending end 320 is connected with the quantum key detection end 210 through the Dammam grating 400.

[0049] More specifically, the Dammam grating 400 is a one-dimensional Dammam grating, a two-dimensional Dammam grating or a three-dimensional Dammam grating.

[0050] In the specific implementation process, the photon orbital angular momentum eigenstate constitutes a complete set of orthogonal basis vectors in mathematics, so that high-dimensional information coding can be realized by using the orbital angular momentum. The state containing the orbital angular momentum can be expressed as:

[0051]

[0052] wherein, represents the relative phase for coding, b A,B ∈{0,π} wherein 0 and π respectively represent 0 and 1 in coding.

[0053] The spatial light modulator 324 has different diffraction angles due to carrying different orbital angular momentum orders, so as to be emitted to the corresponding measuring device by the Dammam grating 400. The orbital angular momentum that can be detected by the Dammam grating 400 can be selected to be an array type of one-dimensional, two-dimensional or three-dimensional structure, and is increased with the expansion of the number of users.

[0054] In practice, the Dammam grating 400 demultiplexes the orbital angular momentum multiplexed signals transmitted in a line along different diffraction orders, and the diffraction angle corresponding to the order can be expanded in an array type. Currently, there are one-dimensional, two-dimensional and three-dimensional Dammam gratings 400. A one-dimensional vortex Dammam grating is formed by using the vortex phase of a traditional vortex grating as the main body and supplementing with a Dammam structure, and the complex amplitude distribution is:

[0055]

[0056] wherein, E nx represents the normalized energy of the nth diffraction order energy relative to the total energy, l x represents the topological charge interval carried by the x-direction vortex Dammam grating, For spatial phase angle, grating period T determines the size of diffraction angle, n x represents the diffraction order in the x direction.

[0057] At this time, the complex amplitude of each diffraction order carries the topological charge order completely determined by n x l x term, because this term is a term related to the diffraction order n x Therefore, different orders of OAM beams enter different diffraction orders respectively. The diffraction energy is equally divided in N orders of the Dammann grating 400, solving the problem of detecting weak signals of high orders in traditional gratings. Therefore, the dynamic range of the orbital angular momentum channel detection is improved by the Dammann grating 400. A large number of orbital angular momentum channels carried by the incident coaxial OV beam can be parallel demultiplexed by a single Dammann grating 400, without the need for additional optical splitters or complex computer-generated holograms in the detection system.

[0058] Therefore, the orbital angular momentum multiplexing and demultiplexing network system is realized by the spatial light modulator 324 and the Dammann grating 400 respectively. The number of orbital angular momentum multiplexing generated by the spatial light modulator 324 corresponds to N local public security user terminals 300, which can be increased with the increase of the number of public security bureaus.

[0059] More specifically, the quantum key management cloud platform 200 further comprises a quantum gateway 230;

[0060] The quantum gateway 230 is connected with the classical police system center 100 and the quantum key detection terminal 210 respectively.

[0061] More specifically, the local police subsystem 310 is connected with the quantum gateway 230 through a classical channel.

[0062] More specifically, the local police subsystem 310 is connected with the classical police system center 100 through a classical channel.

[0063] In the specific implementation process, the classical police system center 100 comprises a household system, a criminal investigation system and a public security system, and the local public security user terminal 300 can obtain case-related materials such as household information, criminal investigation information and local public security information from the classical police system center 100.

[0064] In the implementation process, the local police subsystem 310 mainly processes the request of communication, requests communication to the police system center, and accepts the quantum communication preparation instruction from the quantum gateway 230. The local public security user terminal 300n requests communication to the classical police system center 100 through the classical channel in its local police subsystem 310, the classical police system center 100 delivers the communication instruction to the key management cloud platform through the quantum gateway 230, and the key management cloud platform informs the local police subsystem 310 of the corresponding local public security user terminal 300n through the classical channel after receiving the request. The local public security user terminal 300n sends a single photon signal through the quantum key sending end 320 into the Damm grating 400 through the quantum channel, and the Damm grating 400 sends the single photon signal into the quantum key detection end 210 in the quantum key management cloud platform 200, and the quantum key detection end 210 transmits the detection result to the detection result sending end 220, and then the detection result sending end 220 informs the local police subsystem 310 of the communication parties.

[0065] More specifically, the quantum key management cloud platform 200 further comprises a quantum data management module 240.

[0066] The quantum data management module 240 is connected with the quantum key detection end 210.

[0067] In the implementation process, the quantum data management module 240 manages / stores quantum data.

[0068] More specifically, the quantum key detection end 210 comprises a beam splitter 211, a first single photon detector 212 and a second single photon detector 213.

[0069] The output end of the adjustable optical attenuator 325 is connected with the input end of the beam splitter 211 through the Damm grating 400, the output ends of the beam splitter 211 are respectively connected with the input ends of the first single photon detector 212 and the second single photon detector 213, and the output ends of the first single photon detector 212 and the second single photon detector 213 are respectively connected with the detection result sending end 220.

[0070] In the implementation process, after the signal light enters the beam splitter 211, detection is performed on the first single photon detector 212 and the second single photon detector 213.

[0071] Embodiment 2

[0072] This embodiment takes two users (local public security user terminal A and local public security user terminal B) as an example to illustrate the specific process of key distribution.

[0073] Each local public security user terminal 300 divides the phase interval (0, 2π) into M phase pieces by making a public appointment through a classical channel,

[0074] The local public security user end A and the local public security user end B send intensity and phase unmodulated, but the strong light modulated by the spatial light modulator 324 is sent to the key management cloud platform through the quantum channel, so that the key management cloud platform calibrates the overall phase stable channel and reduces the phase mismatch. Then, the local public security user end A and the local public security user end B attenuate the light pulse intensity to the single photon level, and modulate the phase and intensity, and the phase and intensity modulation parameters are controlled by the random number generator 326, wherein the base vector phase β a,b ∈{0,π / 2} corresponds to the base {X,Y}, the local public security user end A modulates the phase and intensity as α a and μ a , and the local public security user end B modulates the phase and intensity as α b and μ b respectively. The outgoing photons enter the key receiving detection end of the key management cloud platform through the Dammam grating 400 for detection.

[0075] The key management cloud platform publishes the detector response results of all rounds through the detection result sending end 220, and the local public security user end A and the local public security user end B set the variable K=0(π) according to which detector response, and the non-response and double-response events are discarded.

[0076] The local public security user end A publishes the intensity μ used, the base phase β a , and the phase sheet Δ k(a) through the classical channel; the local public security user end B publishes which round parameters are matched and discards the unmatched rounds; then they publish the bit values in the matched rounds except for the signal state X base.

[0077] In order to generate the bits on the signal state X base, the local public security user end B obtains the bit phase α a of the local public security user end A through the relationship K=|α b -α a ; the local public security user end A and the local public security user end B generate bit 0(1) through α a =0(π); the previously published bits are used for decoy state parameter estimation, and the measurement results are shown in Table 1.

[0078]

[0079]

[0080] The local public security user end A and the local public security user end B can obtain the original key according to the detection response, and finally perform a post-processing process, including monitoring detection, error code analysis, privacy amplification, and finally generate a secure key.

[0081] Further modifications and changes to the embodiments disclosed herein can occur to those skilled in the art with the disclosures and teachings provided in the above descriptions. As such, the specifics of the embodiments disclosed herein are not to be taken as limiting the present application, but rather are to be taken as merely representative of the generic application described. In addition, while the particular terminology used through out this specification has been chosen for the sake of clarity, no limitation of the application is intended thereby.

Claims

1. A public security cooperative police system based on quantum communication, characterized in that, The system comprises a classical police system center, a quantum key management cloud platform and a plurality of local police user terminals. The quantum key management cloud platform comprises a quantum key detection terminal and a detection result sending terminal. The local police user terminal comprises a local police subsystem and a quantum key sending terminal. The classical police system center is connected with the quantum key detection terminal and the local police subsystem, the quantum key sending terminal is connected with the quantum key detection terminal, the quantum key detection terminal is connected with the detection result sending terminal, and the detection result sending terminal is connected with the local police subsystem.

2. The public security cooperative police system based on quantum communication according to claim 1, characterized in that, The system further comprises a Dammam grating. The quantum key sending terminal is connected with the quantum key detection terminal through the Dammam grating. 3.The public security cooperative police system based on quantum communication according to claim 2, wherein, The Dammam grating is a one-dimensional Dammam grating, a two-dimensional Dammam grating or a three-dimensional Dammam grating.

4. The public security cooperative police system based on quantum communication according to claim 1, characterized in that, The quantum key management cloud platform further comprises a quantum gateway. The quantum gateway is connected with the classical police system center and the quantum key detection terminal.

5. The public security cooperative police system based on quantum communication according to claim 2, characterized in that, The quantum key sending terminal comprises a laser light source, an intensity modulator, a phase modulator, a spatial light modulator and an adjustable optical attenuator connected in sequence. The output end of the adjustable optical attenuator is connected with the quantum key detection terminal through the Dammam grating.

6. The public security cooperative police system based on quantum communication according to claim 5, characterized in that, The quantum key sending terminal further comprises a random number generator. The output end of the random number generator is connected with the input end of the intensity modulator and the input end of the phase modulator.

7. The public security cooperative police system based on quantum communication according to claim 5, characterized in that, The quantum key detection terminal comprises a beam splitter, a first single-photon detector and a second single-photon detector. The output end of the adjustable optical attenuator is connected with the input end of the beam splitter through the Dammam grating, the output end of the beam splitter is connected with the input end of the first single-photon detector and the input end of the second single-photon detector, and the output end of the first single-photon detector and the output end of the second single-photon detector are connected with the detection result sending terminal.

8. The public security cooperative police system based on quantum communication according to claim 1, characterized in that, The local police subsystem is connected with the classical police system center through a classical channel.

9. The public security cooperative police system based on quantum communication according to claim 4, characterized in that, The local police subsystem is connected with the quantum gateway through a classical channel.

10. The public security cooperative police system based on quantum communication according to claim 1, characterized in that, The quantum key management cloud platform further comprises a quantum data management module. The quantum data management module is connected with the quantum key detection terminal.

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