Phase compensation implementation method of continuous variable quantum key distribution system

A technology of quantum key distribution and phase compensation, applied in the field of quantum communication, can solve problems such as reducing system security

Inactive Publication Date: 2017-08-22
CENT SOUTH UNIV
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  • Abstract
  • Description
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Problems solved by technology

However, one of the biggest disadvantages of the GMCS method is that when the local oscillator light and signal light are transmitted in the channel

Method used

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  • Phase compensation implementation method of continuous variable quantum key distribution system
  • Phase compensation implementation method of continuous variable quantum key distribution system
  • Phase compensation implementation method of continuous variable quantum key distribution system

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Embodiment Construction

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] First, the sender and the receiver initialize the communication of the system, including the initialization of the signal source, modem, detector and control circuit in the system. The sender uses a laser to generate pulsed signals. In the signal light path, the sender codes and modulates the coherent regular components X and P through Gaussian modulation, so that the mean and variance of the signal light obey the Gaussian distribution. The sender transmits the modulated signal lig...

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Abstract

The invention discloses a phase compensation implementation method of a continuous variable quantum key distribution system. A sender performs Gaussian modulation on initial continuous key data by using the coherent state and then sends the modulated signals to a receiver through an optical fiber channel; and the receiver performs preprocessing, error corrosion and confidentiality enhancement on the acquired initial continuous key data by using an algorithm based on orthogonal basis expansion so as to acquire the final security key. According to the method, the practical use of the continuous variable quantum cryptography is prompted, and environmental interference and human attack affected by the quantum signals in the quantum communication process can also be effectively suppressed.

Description

technical field [0001] The invention belongs to the technical field of quantum communication, and relates to a phase compensation realization method of a continuous variable quantum key distribution system based on data post-processing. Background technique [0002] Secure communication has always been one of the research focuses in the field of communication. Both legal communication parties encrypt the information to be transmitted through the key, which can increase the difficulty for the third party to obtain the information. Key distribution and key management play an important role in this process. Quantum key distribution provides a physical principle-based key distribution method for legitimate communication parties, so it has attracted much attention in recent years. [0003] Quantum keys are relative to traditional keys, both of which belong to the category of secure communication. Existing known methods of secure communication, including quantum keys, are only s...

Claims

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Application Information

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IPC IPC(8): H04B10/25H04B10/548H04L9/08
CPCH04B10/25H04B10/548H04L9/0819H04L9/0852
Inventor 郭迎赵微黄端李飞
Owner CENT SOUTH UNIV
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