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An Information Leakage Resistant Quantum Dialogue Method Based on Single Photons with Polarization and Empty Mode Degrees of Freedom

A technology of information leakage and quantum dialogue, applied in the field of quantum cryptography, which can solve problems such as information leakage

Active Publication Date: 2022-04-22
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Tan and Cai[25] and Gao et al.[26-27] independently pointed out that there is a phenomenon of classical correlation or information leakage in QD, which means that the external Eve can easily know the secret information about the correspondent only from the public announcement part of the information

Method used

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  • An Information Leakage Resistant Quantum Dialogue Method Based on Single Photons with Polarization and Empty Mode Degrees of Freedom
  • An Information Leakage Resistant Quantum Dialogue Method Based on Single Photons with Polarization and Empty Mode Degrees of Freedom
  • An Information Leakage Resistant Quantum Dialogue Method Based on Single Photons with Polarization and Empty Mode Degrees of Freedom

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Embodiment

[0111] 1. Application example of QD method

[0112] Now a specific example is given to explain the two-way communication process of the inventive method, with the nth group (L n ,L' n ) as an example. Suppose (i n ,j n )=(0,0) and (k n , l n )=(0,1). Moreover, suppose L n and L' n Initially prepared as a quantum state Thus, after Alice and Bob's encoding, L n is transformed into while L' n is left unchanged. Since Bob himself prepared L n , he naturally knows its initial state and base of measurement. Bob then uses the correct measurement basis Measurement and publish his measurements. According to L n The initial state of and his own composite unitary operation Bob can decrypt (i n ,j n )=(0,0). For Alice, after hearing Bob's After the publication of the measurement results, she uses the correct measurement basis Measure L' n come to know L n initial state. Then, through her own compound unitary operation, Alice Can decrypt out (k n , l ...

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Abstract

The invention proposes an anti-information leakage quantum dialogue method based on a single photon with polarization and empty mode freedom degrees. In the method of the present invention, the initial states of the single photons with polarization and null-mode degrees of freedom used for encoding are secreted by the two communicators by directly transmitting their auxiliary single photons from one communicator to the other. shared. In this way, the problem of information leakage is avoided. Moreover, detailed security analysis also shows that the method of the present invention can resist Eve's active attack, such as Trojan horse attack, interception-resend attack, measurement-resend attack, entanglement-measurement attack. The method of the present invention only requires single photons with polarization and empty mode degrees of freedom as quantum resources and single photon measurements. Since the preparation and measurement of single photons with polarization and empty mode degrees of freedom can be realized with existing experimental techniques, the method of the present invention is practically feasible.

Description

technical field [0001] The invention relates to the field of quantum cryptography. The invention designs an anti-information leakage quantum dialogue method based on a single photon with polarization and empty mode freedom degrees, and realizes mutual exchange of secret messages between two communicators. Background technique [0002] In 1984, Bennett and Brassard [1] proposed the first quantum key distribution (Quantum key distribution, QKD) method, that is, the BB84 method, which means the birth of quantum cryptography. The security of quantum cryptography is based on the laws of quantum physics rather than the difficulty of solving complex mathematical problems. Since then, researchers have proposed many QKD methods [2-4], each of which aims to create a shared secret between two communicators through the transmission of quantum signals. Afterwards, Quantum secure direct communication (QSDC), another important branch of quantum cryptography, was first proposed by Long an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08H04B10/70
CPCH04L9/0852H04B10/70
Inventor 叶天语李宏坤胡家莉
Owner ZHEJIANG GONGSHANG UNIVERSITY