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A Continuous Variable Quantum Key Distribution Security Defense Method

A quantum key distribution and security defense technology, which is applied in the continuous variable quantum key distribution security defense field based on shot noise variance monitoring, can solve problems such as inability to obtain key rate, defense failure, and inability to obtain shot noise variance

Active Publication Date: 2018-01-19
上海循态量子科技有限公司
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Problems solved by technology

At this time, the legitimate communication party will not be able to obtain the changed variance of the shot noise, so that the real key rate cannot be obtained, resulting in the failure of the defense. This is the principle of the shot noise variance scaling attack based on the local oscillator.

Method used

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  • A Continuous Variable Quantum Key Distribution Security Defense Method
  • A Continuous Variable Quantum Key Distribution Security Defense Method
  • A Continuous Variable Quantum Key Distribution Security Defense Method

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Embodiment Construction

[0052] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0053] The CVQKD system security defense method based on shot noise variance monitoring provided by the present invention, such as figure 1 , figure 2 As shown, the specific steps are as follows:

[0054] (1) Optical signal transmission stage of the CVQKD system: first, the CVQKD system encodes a series of Gaussian random numbers from the Alice end on the coherent state, takes the encoded coherent state as the signal state, and passes the time division multiplexing and The polarization multiple...

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Abstract

The invention discloses a continuous variable quantum key distribution (CVQKD) security defense method. The method comprises the following steps: A, shot noise monitoring: establishing a shot noise variance by monitoring the local oscillation light intensity of a receiving end in real time; and B, key rate calculation: calculating a running key rate according to the real-time shot noise variance estimated in the step A, wherein the two steps are executed simultaneously and concurrently. The shot noise variance during system running is acquired through a method for monitoring the local oscillation light of the receiving end of a CVQKD system, and the real-time running key rate of the system is acquired in combination with a parameter estimation method, so that security pre-warning is given to system security.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a continuous variable quantum key distribution (CVQKD) security defense method based on shot noise variance monitoring. [0002] This method is the defense technology proposed for this series of attack methods. In addition, since the detection security of this method is based on the real-time key rate, it can also detect general collective attacks. Background technique [0003] As information security has attracted more and more attention, quantum secure communication with unique security has gradually become familiar to everyone. After nearly 30 years of development, discrete variable quantum secure communication technology has already appeared in commercial products. Continuous variable quantum secure communication technology appeared relatively late, but developed rapidly, and is currently undergoing applied research. Like discrete variable techniques, continuou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L9/08
CPCH04L9/0819H04L9/0852H04L63/062
Inventor 黄鹏黄端刘维琪韩二虎曾贵华
Owner 上海循态量子科技有限公司
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