A quantum communication method and communication network based on secure relay

Abstract

The present invention provides a quantum communication method and communication network based on a secure relay. The sender encrypts plaintext information to be sent to obtain encrypted ciphertext; the sender sends the encrypted ciphertext to the relay through a quantum communication protocol The node is configured to send the encrypted ciphertext to a receiver through at least one relay node; after receiving the encrypted ciphertext, the receiver decrypts the encrypted ciphertext to obtain the plaintext information. The encrypted ciphertext is transmitted step by step through at least one relay node, and the distance between the sender and the receiver is not limited, so that the encrypted ciphertext can be transmitted over a long distance. At the same time, before reaching the recipient, the plaintext information is transmitted in the form of encrypted ciphertext, without decryption, which reduces the risk of information being eavesdropped and improves security.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to a quantum communication method and a communication network based on a secure relay. Background technique [0002] As a cross product of quantum physics and cryptography, quantum communication has attracted widespread international attention because of its ability to perceive eavesdropping, which makes the communication process highly secure. At present, the research of quantum communication mainly focuses on three popular directions: (1) quantum direct communication, quantum secure direct communication (QSDC); (2) quantum key distribution, quantum key distribution (QKD); (3) quantum secret sharing, Quantum secret sharing (QSS). QKD and QSS can use the principle of quantum mechanics to complete key agreement and key sharing between two legitimate users. The key will be used in subsequent classical communication to complete the transmission of private information. Q...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a quantum communication method and communication network based on a secure relay, which is used to solve the problem that quantum communication cannot be realized between two relatively long distances due to the limitation of line loss, so that quantum communication cannot be used in a large range. The defect of promoting, realizing long-distance quantum communication, makes quantum communication popularize in a large scale

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