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Quantum key distribution eavesdropping judgment method based on BB84 protocol

A quantum key distribution, BB84 technology, applied in the field of quantum communication

Active Publication Date: 2016-07-06
XIDIAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a quantum key distribution wiretapping discrimination method based on the BB84 protocol for the above-mentioned deficiencies in the prior art, to solve the problem of security in quantum encryption produced by non-ideal devices and imperfect experimental conditions

Method used

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  • Quantum key distribution eavesdropping judgment method based on BB84 protocol
  • Quantum key distribution eavesdropping judgment method based on BB84 protocol
  • Quantum key distribution eavesdropping judgment method based on BB84 protocol

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Embodiment approach

[0049] refer to figure 1 , the implementation steps of the present invention are as follows:

[0050] Step 1, according to the average photon number parameter in the BB84 protocol, define the Poisson distribution formula that the number of photons in the sent pulse obeys, namely

[0051] P 1 [ k ] = ( μ η ) k k ! e - μ η , k = 0 , 1 , 2 ... . - - - 1 >

[0052] Among them, μ is the number of photons in the transmitted pulse, η is the transmission efficiency under different channel conditions, η≤1, μ...

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Abstract

The invention discloses a quantum key distribution eavesdropping judgment method based on a BB84 protocol, and mainly aims to solve the safety problem in quantum encryption caused by non-ideal devices and imperfect experimental conditions. According to the technical scheme, the method comprises the following steps: the overall probability distribution of photon number in a received pulse sequence is judged according to the Poisson distribution followed by the number of photons in sent pulses and the Poisson distribution or normal distribution satisfied by the number of retransmitted photons after an eavesdropper intercepts part of photons; the source of received information error is judged according to the overall probability distribution of photon number; if the overall probability distribution of photon number is damaged, that the information error is from an eavesdropping attack is judged, legitimate participants believe that the communication is unsafe and cancel the communication; or, that the information error is from a non-ideal channel is judged, and legitimate participants adjust the parameters of the non-ideal channel to reduce information error. The method improves the efficiency and safety of quantum key distribution, and can be used in the BB84 protocol.

Description

technical field [0001] The invention belongs to the field of quantum communication, in particular to an analysis method of a quantum key distribution wiretapping discrimination scheme based on the BB84 protocol, which is used to solve the problem of low quantum information transmission efficiency and quantum encryption caused by non-ideal devices and imperfect experimental conditions security issues in . Background technique [0002] Quantum communication is a communication technology that uses the basic principles of quantum mechanics, and its specific forms include quantum secret communication, quantum teleportation and quantum safe direct communication. Quantum teleportation is based on the property of entanglement, which can realize the transfer of quantum states over long distances. Quantum safe direct communication can realize the transmission of information under the premise of ensuring channel security. Quantum secure communication is based on quantum key distribut...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L9/08
CPCH04L9/0852H04L63/1466H04L63/1475
Inventor 赵楠刘传起朱畅华权东晓李坚陈南裴昌幸
Owner XIDIAN UNIV
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