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A cyclic differential phase-shifted quantum key distribution protocol based on orbital angular momentum

A quantum key distribution and orbital angular momentum technology, applied in key distribution, can solve the problems of low key rate, limit the practicability of cyclic differential phase shift quantum key distribution, etc., to reduce operation steps and improve key generation rate , the effect of high key error rate

Active Publication Date: 2018-12-25
南京南瑞网络安全技术有限公司 +4
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Problems solved by technology

However, because the cyclic differential phase shift quantum key distribution theoretically requires a pulse sequence composed of L pulses to generate a one-bit key, resulting in a low key rate, which limits the practicability of the cyclic differential phase shift quantum key distribution

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  • A cyclic differential phase-shifted quantum key distribution protocol based on orbital angular momentum
  • A cyclic differential phase-shifted quantum key distribution protocol based on orbital angular momentum
  • A cyclic differential phase-shifted quantum key distribution protocol based on orbital angular momentum

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Embodiment Construction

[0031] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. 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.

[0032] Such as figure 1 , 2As shown, this embodiment provides a cyclic differential phase shift quantum key distribution protocol based on orbital angular momentum, and the implementation method of the protocol includes the following steps:

[0033] S1, the sending end Alice uses the first random number generator (RNG) to generate a string of binary random numbers S of length L 1 ,S 2 ,...,S L ;Alice then generates L orbital angular momentum patterns according to the length L of ...

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Abstract

The invention discloses a circulating differential phase shift quantum key distribution protocol based on orbital angular momentum. The invention adopts photon orbital angular momentum as an information carrier to realize circulating differential phase shift quantum key distribution protocol. This protocol not only reduces the operation steps in the actual quantum key distribution process, but also tolerates high key error rate, theoretically up to 50%, BB84-QKD protocol requires a key error rate of no more than 11% to generate a secure key. At the same time, the invention uses the superposition states of the orbital angular momentum of L kinds of different topological charges to carry out the information coding of the circularly differential phase-shifted quantum key distribution, theoretically one photon can generate one-bit key, and the generation rate of the key is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber quantum communication, in particular to a cyclic differential phase shift quantum key distribution protocol based on orbital angular momentum. Background technique [0002] Quantum key distribution is based on quantum theory and information theory, and can securely distribute keys in real time over insecure public channels. Therefore, combining quantum key distribution with one-time pad can realize unconditionally secure confidential communication. The existing quantum key distribution needs to perform key amplification by monitoring the key error rate in the transmission process, and the cyclic differential phase shift quantum key distribution (RRDPS-QKD) proposed by Japanese scholar Sasaki et al. in 2014 Key amplification can be performed without monitoring the key error rate during transmission, which not only reduces the number of operational steps in the actual quantum key distribution...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70
CPCH04B10/70H04L9/0819H04L9/0852H04L9/0858H04L9/0869
Inventor 赵高峰于浩刘金锁潘子春胡倩倩卓文合贾玮冯宝李振伟张璐张影吕超昝继业卞宇翔完颜绍澎马亚妮赵生妹
Owner 南京南瑞网络安全技术有限公司
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