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A Controlled Quantum Secure Direct Communication Method Based on Five Particles

A technology of secure direct communication and particles, which is applied in photon quantum communication, secure communication devices, and key distribution, and can solve problems such as low transmission efficiency

Active Publication Date: 2020-05-12
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The transmission efficiency of quantum communication is related to the number of qubits used. The larger the number of qubits used in communication, the lower the transmission efficiency. Therefore, the transmission efficiency of this protocol is as low as 40%.

Method used

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  • A Controlled Quantum Secure Direct Communication Method Based on Five Particles
  • A Controlled Quantum Secure Direct Communication Method Based on Five Particles
  • A Controlled Quantum Secure Direct Communication Method Based on Five Particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] 1. Measure retransmission attacks

[0090] The eavesdropper Eve randomly selects one of the two measurement bases to measure the captured particles, and sends the corresponding particles to the receiver Bob based on the measurement results. Since the decoy photon is randomly selected from two non-orthogonal bases and randomly inserted into the transmitted sequence, the eavesdropper Eve does not know the position and initial state of the decoy photon, so when the eavesdropper Eve performs some operations on the decoy photon Will cause errors and be discovered during eavesdropping detection. The error rate of detection particles caused by the measurement of retransmission attacks is 1-(1 / 2) n , Where n represents the number of decoy photons.

[0091] 2. Intercept and retransmit attack

[0092] The eavesdropper Eve captures some particles, and then sends a string of particles he prepared in advance to the receiver Bob. Similarly, since the eavesdropper Eve does not know the po...

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PUM

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Abstract

The invention discloses a controlled quantum secure direct communication method based on five particles, which adopts the method of sending one particle to the receiver, and improves the transmission efficiency of communication by reducing the number of particles transmitted in the quantum channel; 3 particles use a quantum state to encode 3 bits of information, thus increasing the encoding capacity, increasing the number of information bits exchanged by the communication parties, and increasing the transmission efficiency to 60%.

Description

Technical field [0001] The invention belongs to the field of quantum security communication, and relates to a five-particle-based controlled quantum security direct communication method. Background technique [0002] Quantum information includes two research directions: quantum communication and quantum computing. The rapid development of quantum communication in the past two decades provides a new way of thinking for secure communication systems. Quantum secure direct communication is a new form of quantum communication. It uses quantum channels to directly transmit secret information, and both parties do not need to establish keys in advance. [0003] The existing controlled quantum secure direct communication protocol based on the five-particle cluster state and the quantum one dense at a time. The sender retains 2 particles, and then sends two particles to the receiver and one particle to the controller, so one state Only 2bit information can be encoded. The transmission effi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08H04B10/70
CPCH04B10/70H04L9/0852H04L9/0858
Inventor 曹正文李艳彭进业柴庚冯亚萍曾贵华贺晨王真
Owner NORTHWEST UNIV
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