Dual-channel information transmission method oriented to quantum key distribution

Abstract

The invention discloses a dual-channel information transmission method oriented to quantum key distribution. The method comprises the following steps: based on the quantum secret key distribution protocol, storing the secret keys generated by a sending end and a receiving end in the secret key pool; when the sending end receives the request for transmitting the confidential information, the sending end judges whether the quantum channel is free or not according to the channel identification, if yes, a similar quantum safe direct communication mode is adopted on the quantum channel, and the confidential information is jointly transmitted on a classical channel by adopting a one-time encryption mode; and if not, the confidential information in a one-time encryption mode on the classic channel. By means of the method, the function of transmitting the confidential information at the same time through the quantum channel and the classic channel is achieved, the transmission efficiency of confidential information is improved, the transmission time is saved, and the maximization of the utilization rate of the channel resources is realized. In addition, the invention further provides an expansion coding scheme, so that more confidential information can be carried by the quantum state, and the communication efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of communication information transmission, in particular to a two-channel information transmission method oriented to quantum key distribution. Background technique [0002] Classical communication depends on the complexity of calculations, but with the improvement of computing power, especially the development of quantum computers, in principle, classical communication can be deciphered. Based on the unique properties of quantum, the concept of unconditionally secure quantum secure communication is proposed. Quantum secure communication includes quantum key distribution (quantum key distribution, QKD for short), quantum teleportation (quantum teleportation, QT for short), quantum secure direct communication (Quantum secure direct communication, QSDC for short), etc. But as far as the current research situation is concerned, quantum key distribution is the most mature research among them, and it is also the...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a dual-channel information transmission method oriented to quantum key distribution. On the basis of the quantum key distribution protocol, the research goal is to improve the utilization rate of the quantum channel to solve the problems of communication efficiency and resource utilization maximization. question

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