Satellite relay encryption transmission method and system for quantum lidar data transmission

Abstract

The application discloses a satellite relay encryption transmission method and system for quantum laser radar data transmission, wherein the method comprises the following steps: a quantum satellite distributes quantum keys to a first ground station located at a first position and a second ground station located at a second position; a quantum laser radar deployed at the first position measures corresponding quantum laser radar data; the quantum laser radar data is encrypted by the quantum keys to generate ciphertext, and the ciphertext is sent to a data center deployed at the second position through a ground optical fiber network, or the first ground station and the quantum satellite perform quantum communication, the ciphertext is forwarded to the second ground station through the quantum satellite, and the data is uploaded to the data center after decryption. The application combines quantum laser radar technology and satellite quantum communication technology, realizes a satellite relay encryption transmission scheme for real-time and offline transmission of quantum laser radar data, guarantees the safety of data, and solves the defect that satellite quantum communication cannot transmit data in real time.

Description

Technical Field

[0001] This invention relates to the field of quantum communication, and in particular to a satellite relay encrypted transmission method and system suitable for quantum lidar data transmission. Background Technology

[0002] Meteorological data has a significant impact on human society, economic development, and even national security. Important meteorological data is typically transmitted after being encrypted using traditional encryption methods. Quantum lidar, as a new type of radar, has advantages such as long detection range and high detection accuracy; satellite quantum communication, as a novel key distribution method, has advantages such as high security and long key distribution distance. Therefore, how to leverage the advantages of quantum lidar and satellite quantum technology to integrate quantum lidar technology with satellite quantum communication technology has become an urgent research topic. Summary of the Invention

[0003] The main objective of this invention is to provide a satellite relay encrypted transmission method and system for quantum lidar data transmission that integrates quantum lidar technology with satellite quantum communication technology, thereby achieving secure transmission of quantum lidar data.

[0004] The technical solution adopted in this invention is:

[0005] A satellite relay encrypted transmission method for quantum lidar data transmission is provided, comprising the following steps:

[0006] The quantum satellite will distribute quantum keys to a first ground station located at a first location and a second ground station located at a second location;

[0007] The quantum lidar deployed at the first location measures the corresponding quantum lidar data;

[0008] Quantum lidar data is encrypted using quantum keys to generate ciphertext, which is then sent to a data center deployed at a second location via a terrestrial fiber optic network. Alternatively, the first ground station can communicate with a quantum satellite, which then forwards the ciphertext to the second ground station. After decryption, the ciphertext is uploaded to the data center at the second location.

[0009] Following the above technical solution, the quantum key distributed by the quantum satellite to the first ground station is the first quantum key, and the quantum key distributed to the second ground station includes the second quantum key and the relay key. The relay key is the key calculated by the first quantum key and the second quantum key through a preset calculation method. The second ground station solves for the first quantum key based on the second quantum key and the relay key.

[0010] Following the above technical solution, the corresponding quantum lidar data measured by the quantum lidar is the meteorological data at the first location.

[0011] Following the above technical solution, the quantum lidar first generates a data compressed package from the measured quantum lidar data, then slices the data compressed package into fixed-size segments, encrypts it with a quantum key, and then sends it out.

[0012] Following the above technical solution, quantum lidar data is measured and generated at regular intervals.

[0013] Following the above technical solution, the AES-128 encryption algorithm is specifically used to encrypt the quantum lidar data.

[0014] The present invention also provides a satellite relay encrypted transmission system for quantum lidar data transmission, comprising:

[0015] The first ground station, deployed in the first location;

[0016] The second ground station will be deployed at the second location.

[0017] A quantum satellite is used to distribute quantum keys to a first ground station and a second ground station.

[0018] A quantum lidar, deployed at the first location, is used to measure the corresponding quantum lidar data and encrypt it with a quantum key. The encrypted ciphertext is sent to the quantum satellite through the first ground station and then forwarded to the second ground station through the quantum satellite.

[0019] The data center, deployed at the second location, is used to acquire the parsed quantum lidar data via the second ground station.

[0020] Following the above technical solution, the quantum key obtained by the first ground station is the first quantum key, and the quantum key obtained by the second ground station includes the second quantum key and the relay key. The relay key is the key calculated by the first quantum key and the second quantum key through a specific calculation method. The second ground station obtains the first quantum key after parsing the second quantum key and the relay key.

[0021] The present invention also provides a satellite relay encrypted transmission system for quantum lidar data transmission, comprising:

[0022] The first ground station, deployed in the first location;

[0023] The second ground station will be deployed at the second location.

[0024] A quantum satellite is used to distribute quantum keys to a first ground station and a second ground station.

[0025] A quantum lidar, deployed at the first location, is used to measure corresponding quantum lidar data and send it to the first encrypted router;

[0026] The first key management unit, deployed at the first location, is used to store the quantum keys forwarded by the first ground station;

[0027] The second key management unit, deployed at the second location, is used to store the quantum keys forwarded by the second ground station;

[0028] The first encryption router, deployed at the first location, is used to obtain the quantum key from the first key management machine, encrypt the quantum lidar data, and then transmit it to the second encryption router via optical fiber.

[0029] The second encryption router, deployed at the second location, is used to obtain the quantum key through the second key management machine and to decrypt the encrypted quantum lidar data;

[0030] The data center, deployed in a second location, is used to obtain decrypted quantum lidar data via a second encrypted router.

[0031] According to the above technical solution, the quantum key obtained by the first ground station is the first quantum key, and the quantum key obtained by the second ground station includes the second quantum key and the relay key. The relay key is the key calculated by the first quantum key and the second quantum key through a preset calculation method. The second ground station obtains the first quantum key after parsing the second quantum key and the relay key.

[0032] Furthermore, the first ground station is also used to calculate the hash value of the first quantum key and forward it to the first encryption router through the first key management machine. After the first encryption router completes the encryption of the quantum lidar data, it generates ciphertext and sets the hash value of the first quantum key in the header of the ciphertext. The second ground station parses the first quantum key and calculates its hash value, and forwards it to the second encryption router through the second key management machine. The second encryption router uses this to determine whether the header of the ciphertext is correct.

[0033] The beneficial effects of this invention are as follows: This invention utilizes the advantages of quantum lidar and satellite quantum technology, and integrates quantum lidar technology with satellite quantum communication technology to realize a satellite relay encrypted transmission scheme for real-time and offline transmission of quantum lidar data. This not only ensures data security, but also solves the current shortcomings of satellite quantum communication in that it cannot transmit data in real time.

[0034] Furthermore, this invention uses hash values ​​to determine whether the ciphertext header is correct, that is, to determine whether the quantum keys generated in the two locations are consistent. Thus, without transmitting the plaintext key, both parties can simply compare the key hash values.

[0035] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the satellite relay encrypted transmission system for quantum lidar data transmission according to the first embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the satellite relay encrypted transmission system for quantum lidar data transmission according to the second embodiment of the present invention;

[0039] Figure 3 This is a flowchart of the satellite relay encrypted transmission method for quantum lidar data transmission according to the first embodiment of the present invention;

[0040] Figure 4 This is a flowchart of the satellite relay encrypted transmission method for quantum lidar data transmission according to the second embodiment of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] It should be noted that the illustrations provided in the embodiments of the present invention are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0043] In this invention, it should also be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used only for descriptive and distinguishing purposes and should not be construed as indicating or implying relative importance.

[0044] Furthermore, it should be noted that the features of the various embodiments of the present invention can be combined or integrated in whole or in part, and as those skilled in the art will understand, they can interact and operate in different ways. Each embodiment can be implemented independently of each other or in association with one another.

[0045] Satellite quantum communication, as a novel key distribution method, offers advantages such as high security. Quantum satellite communication can generate quantum keys and also encrypt and transmit encrypted data using these keys. By deploying ground stations at two locations, the quantum satellite can act as a relay, communicating indirectly with both ground stations.

[0046] like Figure 1 As shown, the satellite relay encrypted transmission system for quantum lidar data transmission according to the first embodiment of the present invention can realize real-time secure transmission of quantum lidar data. The system mainly includes:

[0047] The first ground station, deployed in the first location;

[0048] The second ground station will be deployed at the second location.

[0049] A quantum satellite is used to distribute quantum keys to a first ground station and a second ground station.

[0050] A quantum lidar, deployed at the first location, is used to measure the corresponding quantum lidar data;

[0051] An encrypted router, deployed at the first location, is used to encrypt quantum lidar data using a quantum key to generate ciphertext. The ciphertext is then transmitted via quantum communication between the first ground station and the quantum satellite to the second ground station, where it is decrypted before being uploaded to the data center.

[0052] The data center is deployed in the second location.

[0053] Since satellite quantum communication relies on quantum light between the ground station and the satellite as a key carrier, it is limited by weather conditions and satellite orbit. Quantum communication can only be carried out when the weather is good and the satellite is passing overhead. In order to overcome this drawback, the present invention proposes an improved second embodiment.

[0054] like Figure 2The diagram illustrates a satellite relay encrypted transmission system for quantum lidar data transmission according to a second embodiment of the present invention. The main difference between this system and the first embodiment is that the second embodiment primarily transmits the encrypted quantum lidar data to the data center via a terrestrial fiber optic network. Specifically, when weather conditions are unfavorable, data transmission is performed via terrestrial communication. The system further includes a first key management unit deployed at a first location and a second key management unit deployed at a second location. The first key management unit stores the quantum keys received by the first ground station, and the second key management unit stores the quantum keys received by the second ground station. Additionally, it includes a first encryption router deployed at the first location and a second encryption router deployed at the second location. The micro-nano quantum satellite and miniaturized ground station possess key distribution and relay capabilities, with a single-station key volume on the order of 100kb. Therefore, a two-day, two-track experiment can achieve 100kb key sharing between locations A and B. After key generation, direct encryption between the ground station and the radar is not yet possible. The key data is transmitted to the key management unit in the terrestrial fiber optic quantum communication system using a network cable connection. Quantum lidar data is generated approximately every 8 minutes, with the original data size around 1MB, compressed to approximately 120kB, resulting in about 180 data sets generated per day. By employing AES-128 encryption, each data set consumes 2048 bits, reducing the daily key consumption to less than 50KB, thus matching the satellite quantum key generation rate. Quantum lidar data from both locations can be generated directly on local computers. The generated compressed data packets are sent to the encryption router of the ground-based fiber optic quantum communication system. The encryption router slices each compressed packet into fixed-size segments and automatically encrypts each packet using a 2048-bit key. The key extraction time between the key management machine and the router is set to equal the quantum lidar data generation time. The encrypted compressed packets are then transmitted from location A to location B via the fiber optic network in the quantum communication system.

[0055] In the above embodiment, the quantum satellite distributes a first quantum key to the first ground station, and the quantum key distributed to the second ground station includes a second quantum key and a relay key. The relay key is a key calculated by the first quantum key and the second quantum key using a specific preset calculation method. The second ground station solves for the first quantum key based on the second quantum key and the relay key.

[0056] The corresponding quantum lidar data measured by quantum lidar is first generated into a data compressed package, then the data compressed package is sliced ​​into fixed sizes, encrypted with a quantum key, and then sent out.

[0057] Quantum lidar data is generated periodically. After receiving the quantum key, the first and second ground stations can store it in the key management machine.

[0058] Furthermore, taking the meteorological data at the first location as an example, the corresponding quantum lidar data measured by quantum lidar is used. For example... Figure 1 As shown, this first embodiment includes a location A section, a location B section, and a quantum satellite section. The location A section includes a ground station A (i.e., the first ground station) and a quantum lidar deployed at location A; the location B section includes a ground station B (i.e., the second ground station) and a data center. Figure 3 As shown, the satellite relay encrypted transmission method for quantum lidar data transmission includes the following steps:

[0059] S31. Meteorological data of location A were obtained by measuring the quantum lidar deployed at location A;

[0060] S32. The quantum lidar encrypts the meteorological data at location A and transmits the ciphertext to the ground station at location A.

[0061] S33. Ground station A and the quantum satellite conduct quantum communication at a specific time, and the quantum satellite distributes quantum keys to ground station A. Ground station A utilizes quantum key distribution. Encrypting radar data and transmitting it to a quantum satellite, such as using quantum keys... The hash value is set in the first 32 bytes and then concatenated with the ciphertext portion.

[0062] S34. At another suitable time (e.g., when ground stations A and B cannot simultaneously generate keys with the quantum satellite), the quantum satellite communicates with ground station B to distribute the quantum key. Relay key (Through a specific calculation method) and (The relay key and encrypted data are obtained through calculation);

[0063] S35 and B ground stations utilize quantum key distribution. and relay key To obtain the quantum key used for decryption The hash value is calculated and compared with the hash value in the first 32 bytes of the ciphertext. If the two hash values ​​are the same, the first 32 bytes of the ciphertext are removed, and the quantum key distribution is used. Decryption is performed to obtain the plaintext.

[0064] S36. Transmit the obtained plaintext data (i.e., meteorological data of location A) to the data center.

[0065] Traditional radar has disadvantages such as short detection range and low accuracy compared to quantum lidar. This invention is the first to combine quantum radar technology with satellite quantum communication technology for data transmission, which solves the problem that satellite communication cannot transmit data in real time, and has a longer transmission distance than fiber optic quantum communication.

[0066] like Figure 2 As shown, the system in the second embodiment mainly includes a location A section, a location B section, a satellite section, and a terrestrial fiber optic network for data transmission. The location A section includes a ground station A (i.e., the first ground station) and a quantum lidar, a first key management machine, and a first encryption router deployed at location A; the location B section includes a ground station B (i.e., the second ground station), a second key management machine, a second encryption router, and a data center. In this embodiment, as... Figure 4 As shown, the satellite relay encrypted transmission method for quantum lidar data transmission includes the following steps:

[0067] S41. Both ground stations complete key distribution via satellite to obtain the same quantum key. The method for generating the same key is as follows: Ground station A first performs key distribution with the quantum satellite to generate the key. Through the quantum satellite relay function, the quantum satellite then distributes keys with ground station B, and ground station B receives the key from station B. and relay key By understanding the relationship between the two keys, ground station B calculates... At this point, ground station B also possesses the same decryption key as ground station A. (Alternatively, ground station B can first perform key distribution with the quantum satellite to generate a key.) Through the quantum satellite relay function, the quantum satellite then distributes keys with ground station A, and ground station A obtains the key from station A. and relay key Based on the relationship between the two, ground station A calculated... At this point, ground station A also possesses the same decryption key as ground station B. );

[0068] S42. The ground station transmits the quantum key and its hash value to the key management machine for management. The key management machine then transmits the key and hash value to the encryption router.

[0069] S43. A quantum lidar deployed at location A measures meteorological data at location A in real time.

[0070] S44. The quantum lidar imports the meteorological data from location A into the first encryption router to complete data encryption and transfers the quantum key. The hash value is set in the first 32 bytes and then concatenated with the ciphertext portion.

[0071] S45. The ciphertext is transmitted to the second encryption router in location B through the optical fiber network between location A and location B at fixed intervals (i.e., the time it takes for the quantum lidar to measure once).

[0072] S46, the second encrypted router at location B obtains the quantum key from the local ground station. And the quantum key book with the corresponding hash value, through the corresponding quantum key The hash value is compared with the hash value in the ciphertext to determine if they are the same. If they are the same, the quantum key is selected, the first 32 bytes of the ciphertext are removed, the plaintext data is obtained, and it is sent to the data center in location B.

[0073] The data center at location S47, location B, obtains plaintext meteorological data related to location A.

[0074] This invention is the first to combine quantum radar technology with satellite quantum communication technology. It encrypts meteorological data detected by quantum lidar using quantum keys and transmits the encrypted radar data via satellite relay or terrestrial fiber optic networks. Furthermore, the second embodiment of this invention overcomes the limitation that ground-to-ground communication cannot achieve real-time encryption and transmission of data via satellite quantum key distribution, enabling real-time encryption and transmission of data between satellites and the ground in quantum satellite communication.

[0075] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0076] The order of the steps in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0077] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A satellite relay encrypted transmission method for quantum lidar data transmission, characterized in that, Includes the following steps: The quantum satellite will distribute quantum keys to a first ground station located at a first location and a second ground station located at a second location; The quantum lidar deployed at the first location measures the corresponding quantum lidar data; Quantum lidar data is encrypted using quantum keys to generate ciphertext. The first ground station communicates with the quantum satellite via quantum communication, and the ciphertext is forwarded to the second ground station via the quantum satellite. After decryption, it is uploaded to the data center located at the second location.

2. The satellite relay encrypted transmission method for quantum lidar data transmission according to claim 1, characterized in that, The quantum key distributed by the quantum satellite to the first ground station is the first quantum key. The quantum key distributed to the second ground station includes the second quantum key and the relay key. The relay key is the key calculated by the first quantum key and the second quantum key using a preset calculation method. The second ground station solves for the first quantum key based on the second quantum key and the relay key.

3. The satellite relay encrypted transmission method for quantum lidar data transmission according to claim 1, characterized in that, The corresponding quantum lidar data measured by the quantum lidar is the meteorological data at the first location.

4. The satellite relay encrypted transmission method for quantum lidar data transmission according to claim 1, characterized in that, The quantum lidar first generates a compressed data package from the measured quantum lidar data, then slices the compressed data package into fixed-size segments, encrypts it with a quantum key, and then sends it out.

5. The satellite relay encrypted transmission method for quantum lidar data transmission according to claim 1, characterized in that, Quantum lidar data is generated through measurements at regular intervals.

6. The satellite relay encrypted transmission method for quantum lidar data transmission according to claim 1, characterized in that, The AES-128 encryption algorithm is specifically used to encrypt the quantum lidar data.

7. A satellite relay encrypted transmission system for quantum lidar data transmission, characterized in that, include: The first ground station, deployed in the first location; The second ground station will be deployed at the second location. A quantum satellite is used to distribute quantum keys to a first ground station and a second ground station. A quantum lidar, deployed at the first location, is used to measure the corresponding quantum lidar data and encrypt it with a quantum key. The encrypted ciphertext is sent to the quantum satellite through the first ground station and then forwarded to the second ground station through the quantum satellite. The data center, deployed at the second location, is used to acquire the parsed quantum lidar data via the second ground station.

8. The satellite relay encrypted transmission system for quantum lidar data transmission according to claim 7, characterized in that, The quantum key obtained by the first ground station is the first quantum key. The quantum key obtained by the second ground station includes the second quantum key and the relay key. The relay key is the key calculated by the first quantum key and the second quantum key through a specific calculation method. The second ground station obtains the first quantum key by parsing the second quantum key and the relay key.

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