CN-122027131-A - Ad hoc network communication system

CN122027131ACN 122027131 ACN122027131 ACN 122027131ACN-122027131-A

Abstract

The invention discloses an ad hoc network communication system based on space quantum key distribution, and relates to the technical field of quantum communication. According to the invention, the information is encrypted by using the quantum key distribution technology, so that the theoretical unconditional security can be realized, any eavesdropping behavior can disturb the quantum state, so that both communication parties can immediately perceive the information, and the risk of information leakage is fundamentally avoided. The quantum key distribution of the free space based on the microwave state is realized through the modulation of the heterodyne detector, the homodyne detector and the traveling wave parametric amplifier in the two-party quantum key distribution system for communication and the coordination of the two-party detection, compared with the propagation of the optical quantum state in the air, the absorption, heat dissipation, turbulence and thermal noise resistance of the microwave state to the air are stronger, the efficiency and the propagation distance of the quantum key distribution are enhanced, and the key management effect of the ad hoc network communication system is improved.

Inventors

CHEN CAISEN
DU JIAXING
JI BOGONG
LI WEI
ZHANG XIN
WANG LIHUI
LUO XIAOLING
SHEN XIAOWEI
PENG CHEN

Assignees

中国人民解放军陆军兵种大学

Dates

Publication Date: 20260512
Application Date: 20260211

Claims (5)

1. An ad hoc network communication system is characterized by comprising a plurality of quantum communication nodes, a plurality of data transmission nodes and a plurality of data receiving nodes, wherein the quantum communication nodes for transmitting data in the plurality of quantum communication nodes are taken as transmitting nodes, and the quantum communication nodes for receiving data are taken as receiving nodes; each quantum communication node comprises a quantum key distribution system and a classical communication system; The quantum key distribution system comprises a heterodyne detector, a homodyne detector, a traveling wave parametric amplifier and a microwave antenna; When a transmitting node transmits information to a receiving node, the transmitting node generates a microwave dual-mode compression state through a traveling wave parametric amplifier, carries out coherent state modulation on a first mode of the microwave dual-mode compression state, and transmits the first mode after coherent state modulation to the receiving node as a transmitted microwave quantum state through a microwave antenna of the microwave dual-mode compression state; the receiving node performs homodyne detection on the received microwave quantum state based on a random measurement base through a homodyne detector thereof, and publishes the selected measurement base to the sending node through a classical communication system thereof, so that the sending node performs heterodyne detection on a second mode of the microwave bimodal compression state through an outer differential detector thereof based on the same measurement base; The sending node and the receiving node carry out binary discretization on the detection result to obtain binary sequences, channel parameter estimation is carried out through respective classical communication systems according to part of the binary sequences, and when the channel is safe, a secret key for encrypting/decrypting transmission data of the sending node and the receiving node is formed based on the binary sequences.
2. The ad hoc network communication system of claim 1, wherein said quantum key distribution system further comprises a correction module; When the transmitting node transmits information to the receiving node, the transmitting node and the receiving node are also used for correcting transmission errors through a correction protocol according to the channel parameter estimation result through a correction module.
3. The ad hoc network communication system of claim 1, wherein said quantum key distribution system further comprises a compression module; when the transmitting node transmits information to the receiving node, the transmitting node and the receiving node are further configured to compress the formed key according to the hash function through the compression module.
4. The ad hoc network communication system of claim 1, wherein each of said quantum communication nodes further comprises a data processing system, an encryption and decryption system, a data storage system, and a data receiving and transmitting system, wherein said data storage system is adapted to store keys; when a transmitting node transmits information to a receiving node, a data processing system of the transmitting node transmits a command for transmitting data to the receiving node and generates a message data stream, so that an encryption and decryption system requests a key to a data storage system of the data processing system to encrypt and transmit the message data stream to the data processing system, and the data processing system transmits the encrypted message data stream to the receiving node through a data receiving and transmitting system of the data processing system; The receiving node receives the encrypted message data stream through the data receiving and transmitting system, and forwards the encrypted message data stream to the encryption and decryption system through the data processing system, so that the encryption and decryption system requests the key to decrypt the message data stream from the data storage system, and the message data stream is obtained.
5. The ad hoc network communication system of claim 4, wherein a request for generating a key is transmitted between a plurality of the quantum communication nodes through the classical communication system every preset period, and the generated key is stored in the respective data storage system through the quantum key distribution system, and the quantum communication node corresponding to the key is marked.

Description

Ad hoc network communication system Technical Field The invention relates to the technical field of quantum communication, in particular to an ad hoc network communication system. Background At present, as a multi-hop wireless communication network which does not need to rely on a fixed infrastructure and can be autonomously and dynamically networked, the self-networking communication system has the core characteristics of realizing network interconnection through distributed node cooperation. In an ad hoc network communication system, each node has the dual functions of a host and a router, and can not only run user application programs, but also forward data and maintain a route. As a network system with flexible application scene, the ad hoc network has the characteristics of dynamic topological structure, self-organization and destruction resistance, low deployment cost, simple maintenance and the like. However, since the dynamic topology of an ad hoc network is vulnerable, it requires enhanced key management. Traditional cryptography generates a secret key through a mathematical principle, the security is complex calculation based on mathematical problems, and a cracking algorithm often needs ultra-high calculation resources and time. However, with advances in science and technology, ultra-high computational power quantum computers and their cracking algorithms may give traditional cryptographic algorithms the possibility of being cracked. Quantum key distribution (Quantum Key Distribution, QKD) conveys information by encoding information on the quantum states of the particles, which ensures that quantum key distribution has unconditional security, since quantum states of quantum key distribution encoded particles follow the principle of quantum mechanics of mismeasurement and unclonable, even with infinite computational power, cannot be stolen without being discovered by an eavesdropper. Quantum key distribution is of both continuous variable quantum key distribution (Continues Variable Quantum Key Distribution, CVQKD) and discrete variable quantum key distribution (Discrete Variable Quantum Key Distribution, DVQKD). Where CVQKD encodes key bits by using continuous variables of the quantum particles, such as amplitude, phase, etc., DVQKD encodes key bits by using discrete properties of the quantum particles. In contrast to DVQKD, CVQKD allows multiple bits to be transmitted in a period of time by using the characteristics of a continuous variable, the key transmission rate being much higher than DVQKD. CVQKD can be implemented over both free space and fibre channel communication media. Free space, i.e., propagating light quantum signals through the atmosphere or vacuum. Fibre channel, i.e. the transmission of optical quantum information as a quantum communication channel over optical fibers. Compared to fibre channel CVQKD, free-space CVQKD has the advantages of bypassing fibre loss for longer distance communications, easier deployment, etc. However, free-space CVQKD also faces challenges such as absorption in the atmosphere, heat dissipation, turbulence and thermal noise that severely affect quantum signals and weather conditions on communication channels, and is difficult to directly apply to an ad hoc communication system, and current ad hoc communication systems have poor key management. Disclosure of Invention In view of the foregoing, it is desirable to provide an ad hoc network communication system. The invention adopts the following technical scheme: The invention provides an ad hoc network communication system, comprising: the system comprises a plurality of quantum communication nodes, a plurality of receiving nodes, a data transmission node and a data transmission node, wherein the quantum communication nodes for transmitting data in the plurality of quantum communication nodes are taken as transmitting nodes, and the quantum communication nodes for receiving data are taken as receiving nodes; each quantum communication node comprises a quantum key distribution system and a classical communication system; The quantum key distribution system comprises a heterodyne detector, a homodyne detector, a traveling wave parametric amplifier and a microwave antenna; When a transmitting node transmits information to a receiving node, the transmitting node generates a microwave dual-mode compression state through a traveling wave parametric amplifier, carries out coherent state modulation on a first mode of the microwave dual-mode compression state, and transmits the first mode after coherent state modulation to the receiving node as a transmitted microwave quantum state through a microwave antenna of the microwave dual-mode compression state; the receiving node performs homodyne detection on the received microwave quantum state based on a random measurement base through a homodyne detector thereof, and publishes the selected measurement base to the sending node through a classical communication system