Network architecture of quantum secret communication network and secret key storage method

Abstract

The invention discloses a network architecture of a quantum secret communication network and a secret key storage method, the network architecture comprises a plurality of KMSs and N relay nodes, and the N relay nodes are a first relay node, a second relay node,..., and an Nth relay node; each relay node comprises a KM and a plurality of QKDs, every two QKDs are respectively connected with the KM, and every two adjacent relay nodes are in classical network connection through the KM of each relay node and are in quantum network connection through the matched QKDs; and the QKD in one relay node and the matched QKD in the adjacent relay node carry out negotiation processing of symmetric quantum key generation, and whether the sent and received quantum keys are consistent is judged. According to the invention, the technology of performing XOR storage on the key at the relay node is adopted, and the relay key always exists in the form of ciphertext in the relaying process, so that the security of the key relaying process is further improved.

Description

technical field [0001] The invention relates to the fields of quantum security communication and optical communication, in particular to a network architecture of a quantum security communication network and a key storage method. Background technique [0002] Quantum communication is a new communication method that uses quantum superposition state and entanglement effect to transmit information. It is a new interdisciplinary subject developed in the past two decades and belongs to a new research field combining quantum theory and information theory. Due to the continuous advancement of technology, the subject of quantum communication has gradually moved from theory to realization in recent years, and is developing in the direction of engineering. Because the security of quantum communication is based on physical principles rather than computational complexity, it can theoretically realize the absolute security of data transmission, so it has attracted people's attention. ...

AI Technical Summary

Problems solved by technology

[0008] In the existing technical solution, the relay node needs to store the key shared between the adjacent trusted relay nodes at both ends. During the relay process, each relay node needs to perform two XOR operations, which consumes The amount of keys to be relayed is twice that of the key, so in a large-scale quantum secure communication network, it will inevitably increase the burden on the key storage of the relay node, reducing the efficiency of the key relay; at the same time increasing the relay The demand for node storage space also increases the cost of deployment accordingly; storing the shared key at both ends of the relay node increases the complexity of key management in KM

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