Star quantum key distribution network still capable of ensuring safety without trusted relay

A quantum key distribution and security technology, which is applied in the field of star-shaped quantum key distribution network, can solve the problems of QKD network insecurity and achieve the effects of saving network resource consumption, improving security, and reducing construction costs

Active Publication Date: 2016-12-07
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Aiming at the problem that the existing trusted relay-based QKD network is vulnerable to attacks and causes insecurity, the present invention proposes a safe, high-speed and stable quantum key distribution network that d...

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  • Star quantum key distribution network still capable of ensuring safety without trusted relay
  • Star quantum key distribution network still capable of ensuring safety without trusted relay
  • Star quantum key distribution network still capable of ensuring safety without trusted relay

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Embodiment Construction

[0035] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] figure 1 (a) shows the structural frame diagram of the quantum key distribution star network without trusted relay of the present invention, the quantum key distribution network adopts the MDIQKD protocol, and includes 3 users (but the distribution network of the present invention The number of users is not limited to 3, but can be any number). Such as figure 1 As shown in (a), the MDIQKD star network includes three users 1-3 and a central node. The central node is used as a receiving end (measurement end), which may include an optical switch 4 , a polarization maintaining beam splitter 5 for forming interference, and two detectors 6 , 7 . Each of the user termi...

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Abstract

The invention discloses a star quantum key distribution network without a trusted relay based on a MDIQKD protocol. The star quantum key distribution network disclosed by the invention is expanded into a star network structure based on a point-to-point MDIQKD system; therefore, network resource consumption is saved; and the difficulty due to network expansion can be solved. According to a light source structure provided by the invention, equipment used in a time feedback scheme, a phase feedback scheme and a polarization feedback scheme is simple and reusable; therefore, the quantum key distribution network is relatively simple, relatively easy to integrate and low in cost; furthermore, feedback requirements can also be reduced through further optimization; and thus, the foundation is laid for further realizing safety, high-speed, large-scale engineering treatment and practicability of quantum secret communication.

Description

technical field [0001] The invention relates to the technical field of optical fiber transmission quantum secret communication, in particular to a star-shaped quantum key distribution network in which a trusted relay can still guarantee security and high speed and stability. Background technique [0002] Quantum secure communication is an emerging subject combining quantum mechanics and modern cryptography. Quantum secure communication includes research directions such as quantum key distribution, quantum secret sharing, quantum secure direct communication, and quantum identity authentication, among which the most commonly used ones have gradually been put into practical use. One class is quantum key distribution. Since quantum key distribution is based on the basic principles of quantum mechanics, coupled with the "one-time secret" communication method, it ensures the absolute security of communication at the physical level. It is very important for the defense units, finan...

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Application Information

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IPC IPC(8): H04L9/08
CPCH04L9/0819H04L9/0852
Inventor 汤艳琳刘洋尹华磊陈腾云张强潘建伟
Owner UNIV OF SCI & TECH OF CHINA
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