Measurement device independent quantum key distribution system and method

A technology for quantum key distribution and measurement equipment, applied in the field of measurement equipment-independent quantum key distribution systems, can solve the problems of inability to resist strong environmental interference, poor practicability, etc., to increase system complexity, ensure homogeneity, and reduce transmission. The effect of efficiency

Active Publication Date: 2017-11-07
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0006] In view of this, the present invention provides a measurement equipment-independent quantum key system and method to solve the problem that the measurement equipment-independent quantum key distribution system in the prior art cannot resist strong environmental interference and has poor practicability

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  • Measurement device independent quantum key distribution system and method
  • Measurement device independent quantum key distribution system and method
  • Measurement device independent quantum key distribution system and method

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Embodiment Construction

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0067] In the existing technology, when the measurement equipment-independent quantum key distribution protocol is actually implemented, the Bell state projection measurement requires that the optical quantum signals arriving at the measurement end have identity, that is, the optical quantum signals of the two parties in the long-distance legal communication are indistinguishable in terms of wavelength, time and polarization characteristics. . The indistinguis...

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Abstract

The invention provides a measurement device independent quantum key distribution system and method. Polarization scrambling is carried out on polarization states of light pulse signals or light quantum signals at quantum state preparation sending ends, so the polarization states of the light pulse signals or the light quantum signals are uniformly distributed on the surface of a Poincare sphere, and the two ways of polarization scrambled light pulse signals or light quantum signals are transmitted to a measuring end for Bell state projection measurement through independent optical channels. At the measuring end, each way of light quantum signal is separated into two orthogonal polarization components, the polarization directions of the two ways of orthogonal polarization components are the same, and the Bell state projection measurement is carried out on the polarization components with the same polarization direction.

Description

technical field [0001] The invention belongs to the technical field of optical transmission secure communication, and in particular relates to a measurement device-independent quantum key distribution system and method. Background technique [0002] Quantum Key Distribution (Quantum Key Distribution) technology is based on the principle of quantum physics, which can realize unconditionally secure key sharing in the sense of information theory. However, due to the non-ideal characteristics of practical devices and equipment, there is a certain gap between the actual security of quantum key distribution systems and the security of theoretical protocols. As the core component of the receiving device of the conventional quantum key distribution system, the single photon detector has become the most vulnerable part, which seriously affects the actual performance of the quantum key distribution system. [0003] The measurement device independent (Measurement Device Independent) q...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/61H04B10/69H04B10/70H04L9/08
CPCH04B10/614H04B10/6162H04B10/6911H04B10/70H04L9/0819H04L9/0852H04L9/0858
Inventor 王双银振强王超陈巍周政何德勇郭光灿韩正甫
Owner UNIV OF SCI & TECH OF CHINA
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