A quantum secure communication method for unmanned platforms

Abstract

The present invention relates to the field of quantum secure communication, and discloses a quantum secure communication method for unmanned platforms. The problem of encrypted transmission of sensitive data between unmanned platforms and between unmanned platforms and master control stations is solved. The system includes: a classical communication system for information exchange between the two communicating parties; a quantum key distribution system for quantum key distribution between the two communicating parties; an identity authentication module for identity authentication and identification; a quantum signal antenna servo module for aligning the quantum signal antenna through the position, orientation and other information of both parties; a quantum signal detection mode prejudgment module for switching the receiving detection mode of the quantum signal based on the distance between the two communicating parties; a quantum key storage module for storing quantum keys; a multidimensional information processing module for processing multidimensional information; a business module for reconnaissance detection, data distribution, etc.; and an encryption and decryption module for encrypting and decrypting information using quantum keys. The present invention greatly improves the security of the master control station's control of the unmanned platform and data interaction.

Description

Technical Field

[0001] The present invention relates to the field of quantum secure communication, and in particular to a quantum secure communication method for unmanned platforms based on quantum key distribution, which can greatly improve the security of measurement and control communications of unmanned platforms. Background Art

[0002] Based on the quantum non-cloning principle and Heisenberg's uncertainty principle, quantum communication has been proven to have unconditionally secure theoretical characteristics. With the advancement of modern science and technology, the degree of autonomy of unmanned platforms continues to increase, and unmanned vehicles, drones, unmanned submarines, etc. are beginning to play an increasingly important role in human society. However, the threats faced by unmanned platform information transmission should not be underestimated.

[0003] At present, the methods for improving the security of unmanned platform measurement and control communications mainly include unmanned platform security, information transmission security, application control security, security and confidentiality operation and maintenance, and security and confidentiality support. Among them, the present invention belongs to the transmission encryption method in information transmission security. The information encryption method used by the unmanned platform is based on the complexity of mathematical calculations. With the introduction of quantum computing, the data link transmission of the unmanned platform faces the risks of theft, attack, and tampering. Therefore, the information security performance of the unmanned platform data link based on the classical encryption method needs to be improved urgently. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of low security of data encryption transmission of unmanned platforms in the above-mentioned background technology, and to propose a quantum secure communication method for unmanned platforms in combination with quantum key distribution technology. This method is based on the existing unmanned platform communication system, combines the characteristics of the unmanned platform and the transmission characteristics of the quantum channel, and is based on the unconditional theoretical security of quantum secure communication, which greatly improves the security of unmanned platform measurement and control communication data transmission.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A quantum secure communication method for an unmanned platform, wherein both the master control station and the unmanned platform include a classical communication system, an identity authentication module, a quantum key distribution system, a quantum information signal antenna servo module, a quantum signal detection mode prediction module, a multi-dimensional information processing module, a business module, an encryption and decryption module, and a quantum key storage module; specifically, the following steps are included:

[0007] (1) Before executing a task, the master control station and the unmanned platform, as well as the unmanned platform and the unmanned platform, confirm whether the quantum key storage module stores a set amount of quantum keys; if not, the quantum key distribution system is used to distribute the quantum keys and store the quantum keys in their respective quantum key storage modules;

[0008] (2) Before the first confidential communication between the two parties, the two parties use the classic communication system to send and receive messages, and use the identity authentication module to authenticate the identity of the sent and received messages. After both parties pass the authentication, the classic communication link is established;

[0009] (3) The multidimensional information processing module of the sender sends its multidimensional information to the business module, which is encrypted and then transmitted to the receiver through the classical communication system; the receiver's classical communication system receives the sender's multidimensional information and sends it to the multidimensional information processing module through the business module. The multidimensional information processing module extracts the multidimensional information and sends it to the quantum signal antenna servo module and the quantum signal detection mode prediction module;

[0010] (4) The quantum signal antenna servo modules of both parties adjust the pitch angle and rotation angle of the antenna according to the real-time movement speed, distance and direction in the multi-dimensional information of both parties for alignment;

[0011] (5) The quantum signal detection mode prediction module of both parties judges the communication distance range of both parties according to the real-time communication distance in the multi-dimensional information. When the communication distance is greater than the threshold L, the receiving detection optical path is switched to the homodyne detection mode. When the communication distance is less than or equal to the threshold L, the receiving detection optical path is switched to the heterodyne detection mode. At this time, the quantum channel is established;

[0012] (6) The quantum key distribution systems of the communicating parties perform quantum key distribution based on the established quantum channel and store the obtained key in the quantum key storage module;

[0013] (7) The sender's business module sends the plaintext information to the encryption and decryption module, which encrypts the plaintext information and then returns the encrypted information to the business module;

[0014] (8) The sender's business module sends and receives the encrypted information through the classic communication system;

[0015] (9) After the receiver's classic communication system receives the ciphertext information, it transmits it to the business module. The business module uses the encryption and decryption module to decrypt the received information. The communicating parties complete the transmission of the measurement and control encrypted information.

[0016] In step (2), both parties use identity identification codes to perform identity authentication. When the identity identification codes correspond, the identity authentication is successful.

[0017] In step (3), the business modules of both parties use quantum keys to encrypt and transmit their respective multi-dimensional information through encryption and decryption modules. The multi-dimensional information includes the current position, speed, distance and direction of the sender, and during the quantum key distribution, the respective multi-dimensional information is transmitted in real time.

[0018] In step (6), if the quantum channel is not found to be attacked by a third party, the obtained quantum key is stored in the quantum key storage module; if the quantum channel is found to be eavesdropped or attacked by a third party, the quantum key distribution is immediately stopped or the communication link is changed, and a warning is sent. When the problem is eliminated, start again from step (2).

[0019] Compared with the existing technology, the beneficial effects of the present invention are:

[0020] 1. Aiming at the flexible and maneuverable characteristics of unmanned platforms, the present invention adds a quantum signal antenna servo control module to the quantum key distribution device. The module performs real-time optical antenna alignment through multi-dimensional information of both parties, which can greatly improve the efficiency of quantum signal reception. This method will not change the existing working mode and action trajectory of the unmanned platform, and does not conflict with the quantum signal antenna module of the existing quantum key distribution device, thus improving the compatibility and practicality of quantum secure communication on unmanned platforms.

[0021] 2. Aiming at the flexible and maneuverable characteristics of unmanned platforms, and based on the relationship between quantum key rate and distance change, the present invention adds a dynamic switching function to the quantum signal detection method, which can greatly improve the quantum key rate and the confidential communication rate of unmanned platforms. This method is compatible with the detection method of existing quantum key distribution equipment and improves the environmental adaptability of quantum key distribution equipment.

[0022] In summary, the present invention achieves a perfect integration of the unmanned platform measurement and control communication system and the quantum secure communication system by adding a servo control system to the quantum signal antenna in the quantum key distribution device and utilizing the characteristics of the quantum key distribution system that balanced heterodyne detection is suitable for short-distance quantum key distribution and balanced homodyne detection is suitable for long-distance quantum key distribution, thereby greatly ensuring the security of the unmanned platform system's measurement and control communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a principle block diagram of the method of the present invention.

[0024] Figure 2 It is a flow chart of a specific embodiment of the present invention.

[0025] Figure 3 It is the key rate curve of balanced homodyne detection and balanced heterodyne detection with the increase of distance under different atmospheric turbulence intensities. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0027] The principle block diagram of a quantum secure communication method for unmanned platforms proposed in the present invention is as follows: Figure 1 As shown, it mainly involves the following modules:

[0028] The main control station and the unmanned platform both include a classical communication system, an identity authentication module, a quantum key distribution module, a quantum information antenna servo module, a quantum signal detection method prediction module, a multi-dimensional information processing module, a business module, an encryption and decryption module, and a quantum key storage module.

[0029] (1) Before executing a task, the master control station and the unmanned platform, as well as the unmanned platform and the unmanned platform, confirm whether the quantum key storage module stores a set amount of quantum keys; if not, the quantum key distribution system is used to distribute the quantum keys and store the quantum keys in their respective quantum key storage modules;

[0030] (2) Before the first confidential communication, the two communicating parties use the classic communication system to send and receive messages, and use the identity authentication module to authenticate the sent and received messages. After both parties pass the authentication, a classic communication link is established; wherein, both parties use identity identification codes to authenticate their identities. When the identity identification codes correspond, the identity authentication is successful.

[0031] (3) The multidimensional information processing module of the sender sends its own multidimensional information to the business module, which uses the quantum key to encrypt the respective multidimensional information through the encryption and decryption module and transmits it to the receiver through the classical communication system; the receiver's classical communication system receives the sender's multidimensional information and sends it to the business module, which is decrypted by the encryption and decryption module and sent to the multidimensional information processing module. The multidimensional information processing module extracts the multidimensional information and sends it to the quantum signal antenna servo module and the quantum signal detection mode prediction module;

[0032] (4) The quantum signal antenna servo modules of both parties adjust the pitch angle and rotation angle of the antenna according to the real-time movement speed, distance and direction in the multi-dimensional information of both parties for alignment;

[0033] (5) The quantum signal detection mode prediction module of both parties judges the communication distance range of both parties according to the real-time communication distance in the multi-dimensional information. When the communication distance is greater than the threshold L, the receiving detection optical path is switched to the homodyne detection mode. When the communication distance is less than or equal to the threshold L, the receiving detection optical path is switched to the heterodyne detection mode. At this time, the quantum channel is established;

[0034] (6) The quantum key distribution systems of the communicating parties perform quantum key distribution based on the established quantum channel. If the quantum channel is not found to be attacked by a third party, the obtained quantum key is stored in the quantum key storage module. If the quantum channel is found to be eavesdropped or attacked by a third party, the quantum key distribution is immediately stopped or the communication link is changed, and a warning is sent. After the problem is eliminated, the process starts again from step (2).

[0035] (7) The sender's business module sends the plaintext information to the encryption and decryption module, which encrypts the plaintext information and then returns the encrypted information to the business module;

[0036] (8) The sender's business module sends and receives the encrypted information through the classic communication system;

[0037] (9) After the receiver's classic communication system receives the ciphertext information, it transmits it to the business module. The business module uses the encryption and decryption module to decrypt the received information. The communicating parties complete the transmission of the measurement and control encrypted information.

[0038] The following takes the quantum secure communication process for unmanned platforms as an example to illustrate the detailed implementation process of the present invention.

[0039] like Figure 2 As shown in the figure, unmanned platform A is the communication initiator and unmanned platform B is the communication receiver. Unmanned platform A needs to send its highly sensitive measurement and control information within three hours to unmanned platform B, and the distance between the two parties is L AB >L, where L is the distance criterion.

[0040] Unmanned platform A, as the communication initiator, sends a communication link establishment request to unmanned platform B through the classical communication system. After identity recognition and authentication, both parties begin to share their respective multi-dimensional information (including position, speed, etc.). At this time, quantum keys are required to encrypt the multi-dimensional information.

[0041] Unmanned platform A and unmanned platform B share multi-dimensional information. First, the quantum signal antenna servo modules of both parties begin to align according to the multi-dimensional information of both parties, so as to ensure the efficient reception of quantum signals. At the same time, the quantum signal detection mode prediction module adjusts the quantum signal reception detection mode according to the communication distance between the two parties at this time. L AB >L, then balanced homodyne detection is used to receive and detect quantum signals. Figure 3 The figure shows the influence of homodyne detection and heterodyne detection on the quantum key rate under different turbulent atmospheric intensities and different distances. The horizontal axis is the transmission distance (Distance), the unit is km, and the vertical axis is the quantum key rate (Secret Key rate), the unit is bit / pulse. Homodyne represents the balanced homodyne detection result, and Heterodyne represents the balanced heterodyne detection. Figure 3It can be seen that the key rate of heterodyne detection is higher at close distances, and the key rate of homodyne detection is higher at long distances. After the antennas are aligned, the two parties begin quantum key distribution. During the key distribution period, the two parties need to continuously share multi-dimensional information to ensure the dynamic adjustment of antenna alignment and quantum signal reception and detection methods, so as to ensure that the quantum key rate is at a high level.

[0042] While quantum key distribution is being carried out, unmanned platform A begins to use quantum key encryption to transmit the information that needs to be encrypted, and unmanned platform B begins to receive the encrypted information and decrypt it using the quantum key, ultimately obtaining the measurement and control information of unmanned platform A.

[0043] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto. The present invention is applicable to a variety of unmanned platform communication scenarios. Within the technical scope disclosed by the present invention, any transformation or replacement that can be easily thought of by a person skilled in the art should be included in the protection scope of the present invention.

Claims

1. A quantum secure communication method for unmanned platforms, characterized in that: The master control station and the unmanned platform both include a classical communication system, an identity authentication module, a quantum key distribution system, a quantum information antenna servo module, a quantum signal detection mode prediction module, a multi-dimensional information processing module, a business module, an encryption and decryption module, and a quantum key storage module; specifically, the following steps are included: (1) Before executing a task, the master control station and the unmanned platform, as well as the unmanned platform and the unmanned platform, confirm whether the quantum key storage module stores a set amount of quantum keys; if not, the quantum key distribution system is used to distribute the quantum keys and store the quantum keys in their respective quantum key storage modules; (2) Before the first confidential communication between the two parties, the two parties use the classic communication system to send and receive messages, and use the identity authentication module to authenticate the identity of the sent and received messages. After both parties pass the authentication, the classic communication link is established; (3) The multidimensional information processing module of the sender sends its multidimensional information to the business module, which is encrypted and then transmitted to the receiver through the classical communication system; the receiver's classical communication system receives the sender's multidimensional information and sends it to the multidimensional information processing module through the business module. The multidimensional information processing module extracts the multidimensional information and sends it to the quantum signal antenna servo module and the quantum signal detection mode prediction module; (4) The quantum signal antenna servo modules of both parties adjust the pitch angle and rotation angle of the antenna according to the real-time movement speed, distance and direction in the multi-dimensional information of both parties for alignment; (5) The quantum signal detection mode prediction module of both parties judges the communication distance range of both parties according to the real-time communication distance in the multi-dimensional information. When the communication distance is greater than the threshold L, the receiving detection optical path is switched to the homodyne detection mode. When the communication distance is less than or equal to the threshold L, the receiving detection optical path is switched to the heterodyne detection mode. At this time, the quantum channel is established; (6) The quantum key distribution systems of the communicating parties perform quantum key distribution based on the established quantum channel and store the obtained key in the quantum key storage module; (7) The sender's business module sends the plaintext information to the encryption and decryption module, which encrypts the plaintext information and then returns the encrypted information to the business module; (8) The sender's business module sends and receives the encrypted information through the classic communication system; (9) After the receiver's classic communication system receives the ciphertext information, it transmits it to the business module. The business module uses the encryption and decryption module to decrypt the received information. The communicating parties complete the transmission of the measurement and control encrypted information.

2. According to claim 1, a quantum secure communication method for unmanned platforms is characterized in that: In step (2), both parties use the identity identification code to perform identity authentication, and when the identity identification codes correspond, the identity authentication is successful.

3. According to claim 1, a quantum secure communication method for unmanned platforms is characterized in that: In step (3), the business modules of both parties use quantum keys to encrypt and transmit their respective multidimensional information through the encryption and decryption modules. The multidimensional information includes the current position, speed, distance and direction of the sender, and during the quantum key distribution, the respective multidimensional information is transmitted in real time.

4. According to claim 1, a quantum secure communication method for unmanned platforms is characterized in that: In step (6), if the quantum channel is not found to be attacked by a third party, the obtained quantum key is stored in the quantum key storage module; If it is found that the quantum channel is being eavesdropped or attacked by a third party, the quantum key distribution is immediately stopped or the communication link is changed, and a warning is sent. When the problem is eliminated, start again from step (2).

Images