Free-space quantum secure direct communication method for real-time selection of preset thresholds

A technology of secure direct communication and free space, applied in the field of quantum secure direct communication in free space, it can solve the problems of high QBER, weak optical signal strength, inability to achieve bit rate, etc., and achieve high signal-to-noise ratio and low qubit error. Bit rate, the effect of reducing the amount of data storage

Active Publication Date: 2019-03-26
JIANGSU ELECTRIC POWER CO +4
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Problems solved by technology

In this case, the strength of some optical signals arriving at the far end may be weak, which leads t

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  • Free-space quantum secure direct communication method for real-time selection of preset thresholds
  • Free-space quantum secure direct communication method for real-time selection of preset thresholds
  • Free-space quantum secure direct communication method for real-time selection of preset thresholds

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Embodiment Construction

[0029] The present invention will be further described below. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0030] The present invention proposes a free-space quantum-safe direct communication method based on a preset threshold real-time selection method (P-RTS), wherein it is assumed that: Alice and Bob use the Bell state As an information carrier for communication, |H> and |V> represent horizontally polarized and vertically polarized photons respectively, and the specific steps are as follows:

[0031] Step 1: The sender Alice and the receiver Bob measure the expected η of the atmospheric transmission rate 0 and its standard deviation σ; then calculate the preset threshold η determined by atmospheric conditions T .

[0032] Step 2: Alice uses a single-photon light source to emit pulses on the micro-photon operation platform to prepare N pai...

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Abstract

The invention discloses a free-space quantum secure direct communication method for real-time selection of preset thresholds. The method comprises the following steps: a sender of the communication prepares N-to-Bell state photon pulses, and sends one of the pulses to a receiver; the receiver randomly selects some photons for measurement to determine whether there is an eavesdropper; then the sender randomly selects some photons as detection states to perform unitary transformation; the receiver performs measurement to evaluate an error code rate; and finally, the receiver measures the remaining encoded Bell states and obtains the information. The method has a lower quantum bit error rate and a higher signal to noise ratio.

Description

technical field [0001] The invention relates to a free space quantum safe direct communication method for real-time selection of preset thresholds, belonging to the fields of quantum safe direct communication technology and quantum mobile communication technology. Background technique [0002] With the construction of Energy Internet, power system information and communication security is now receiving more and more attention. Compared with traditional communication protocols, the unconditional security of quantum communication protocols has attracted people's attention. Now there are different forms of quantum communication, such as quantum key distribution, quantum secret sharing, quantum direct secure communication, etc. Among these quantum communication protocols, Quantum Secure Direct Communication (QSDC) sends secret messages directly on quantum channels without establishing a private key session. In this protocol, a transmitter and receiver first share a pre-arrange...

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Application Information

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IPC IPC(8): H04B10/70H04L9/08H04B10/11
CPCH04B10/11H04B10/70H04L9/0852
Inventor 高莉莎项楠姜红红朱雪阳张影冯宝李维赵天成李天一完颜绍澎贾玮胡倩倩刘金锁卞宇翔吕超马亚妮
Owner JIANGSU ELECTRIC POWER CO
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