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Quantum key distribution method, device and system

A quantum key distribution and key technology, applied in the field of quantum information, can solve the problem of low key coding rate

Active Publication Date: 2021-03-12
TSINGHUA UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0004] This application provides a quantum key distribution method, device and system to solve the problem of low coding rate of the key

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  • Quantum key distribution method, device and system
  • Quantum key distribution method, device and system
  • Quantum key distribution method, device and system

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Embodiment Construction

[0098] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0099] Quantum key distribution is based on the principle of quantum mechanics. Currently, it is the only method that can provide information-theoretical security keys. It has important and extensive applications in practical cryptography, information security, national defense and other fields. At present, the main bottleneck of quantum key distribution lies...

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Abstract

The invention provides a quantum key distribution method, device and system, and the method comprises the steps that communication equipment transmits N rounds of optical signals to measurement equipment, and the communication equipment receives a measurement result, transmitted by the measurement equipment, of each round of optical signal in the N rounds of optical signals, wherein the measurement result of each round of optical signals comprises the measurement result of the measurement equipment for the round of optical signals from the two pieces of communication equipment; the communication equipment determines M rounds of target optical signals from N rounds of optical signals sent by the communication equipment according to the measurement result, and the communication equipment determines M rounds of target optical signals from the N rounds of optical signals according to the two rounds of target optical signals in the M rounds of target optical signals as a pair, and determines T pairs of optical signals from the M rounds of target optical signals; and the communication equipment obtains a secret key of communication between the two pieces of communication equipment according to the T pairs of optical signals. Therefore, the code forming rate of quantum key distribution can be greatly improved.

Description

technical field [0001] The present application relates to the field of quantum information technology, and in particular to a quantum key distribution method, device and system. Background technique [0002] Quantum Key Distribution (Quantum Key Distribution, QKD) is to use the characteristics of quantum mechanics to ensure the security of communication, so that the two sides of the communication can generate and share a random, secure key to encrypt and decrypt messages. It has important and extensive applications in fields such as science, information security, and national defense. [0003] At present, a common quantum key distribution method is Measurement-Device-Independent Quantum Key Distribution (MDI-QKD). Both communication parties A and B are senders, and at the same time send data to different parties in the channel. The trusted measurement device C sends coherent light pulses in a fixed pairing mode. A pair of coherent light pulses corresponds to a single photon...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70
CPCH04L9/0852H04L9/083H04B10/70
Inventor 马雄峰曾培
Owner TSINGHUA UNIV
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