Time-phase quantum key encoding device, system and method

A key coding and coding technology, applied in the field of quantum communication, can solve the problems of complex coding implementation technology, high bit error rate and high implementation cost, and achieve easy coding implementation technology, low bit error rate and low application cost. Effect

Active Publication Date: 2020-10-02
QUDOOR TECH INC
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  • Abstract
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Problems solved by technology

[0006] In the prior art, the time-phase quantum key encoding device implemented by multiple lasers has technical problems that need to be solved urgently, such as complex coding implementation technology, high bit error rate, and high implementation cost.

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  • Time-phase quantum key encoding device, system and method
  • Time-phase quantum key encoding device, system and method
  • Time-phase quantum key encoding device, system and method

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Embodiment Construction

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0036] In the following detailed description, reference is made to the accompanying drawings which are included in the specification and which illustrate specific embodiments of the application and which are included in this application. In the drawings, like reference numerals describe substantially similar components in different views. Vari...

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Abstract

The invention discloses a time-phase quantum key encoding device, system and method. The time-phase quantum key encoding device comprises a seed laser which emits a seed light pulse; a first encodinglaser, a second encoding laser and a third encoding laser which receive split seed light pulses, and emit pulse light signals with the same central wavelength as the seed light pulse by adopting an injection locking technology; an unequal-arm interferometer which is used for receiving the pulse light signal to form an encoded signal and outputting the encoded signal; and an optical modulation unitwhich can be used for preparing decoy-state quantum key codes. The method is high in safety, easy in code forming implementation technology, high in encoding speed, high in code forming rate, low inerror rate and low in application cost.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to a time-phase quantum key encoding device, system and method. Background technique [0002] Security technology is one of the cores of communication technology. Currently the most commonly used RSA encryption algorithm is not absolutely safe in theory. As an emerging technology developed on the basis of quantum mechanics, modern communication and modern cryptography, quantum secure communication is based on the basic principles of quantum mechanics and uses the "one-time pad" method to encrypt information. Unparalleled security advantages. [0003] The BB84 protocol is the most basic quantum key distribution protocol in the field of quantum secure communication. The BB84 protocol uses four polarization states of a single photon to encode. These four polarization states belong to two groups of conjugated groups. The two polarization states in the same group are ort...

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Application Information

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IPC IPC(8): H04L9/08H04B10/70H04B10/50H04B10/516H04B10/556
CPCH04B10/503H04B10/516H04B10/5561H04B10/70H04L9/0858
Inventor 陈柳平王其兵万相奎
Owner QUDOOR TECH INC
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