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: 2018-10-09
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

Method used

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  • Controlled quantum secure direct communication method based on five particles
  • Controlled quantum secure direct communication method based on five particles
  • Controlled quantum secure direct communication method based on five particles

Examples

Experimental program
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Embodiment

[0089] 1. Measuring Replay 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 according to 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 an error and will be caught during wiretapping detection. Measuring the detection particle error rate caused by the retransmission attack is 1-(1 / 2) n , where n represents the number of decoy photons.

[0091] 2. Interception of retransmission attacks

[0092] The eavesdropper Eve captures some particles, and then sends a string of particles prepared by himself to the receiver Bob. Similarly, since the eavesdropper Eve does not know the p...

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PUM

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Abstract

The invention discloses a controlled quantum secure direct communication method based on five particles. A method of sending a particle to a receiver is adopted, and the transmission efficiency of communication is improved by reducing the number of particles transmitted in a quantum channel; and a sender retains 3 particles in the communication process, adopts a quantum state to encode 3 bits of information, thereby improving the encoding capacity, increasing the number of information bits exchanged by both communication parties, and improving the transmission efficiency by 60%.

Description

technical field [0001] The invention belongs to the field of quantum security communication and relates to a controlled quantum security direct communication method based on five particles. 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, which uses quantum channels to directly transmit secret information, and the communicating parties do not need to establish keys in advance. [0003] In the existing controlled quantum secure direct communication protocol based on five-particle cluster state and quantum one-time pad, the sender keeps two particles, then sends two particles to the receiver, and sends one particle to the controller, so a state Only 2bit information can be encoded. The tr...

Claims

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Application Information

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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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