Relaying method for remote secure quantum communication

A technology of quantum secure communication and secure communication, which is applied in the field of optical fiber communication, can solve problems such as limiting the scope of use of quantum secure communication and hindering the development process of practicality, so as to solve the limitation of safe communication distance, improve the effective transmission distance and the degree of confidentiality high effect

Inactive Publication Date: 2011-11-09
SHANGHAI LANGYAN OPTOELECTRONICS TECH
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Problems solved by technology

[0004] In the process of quantum secure communication, the information carrier is single photon. Considering the attenuation of single photon in the optical fiber channel and the detection efficiency of detectors, the communication distance of commercial systems generally does not exceed 100km. This limitation makes po

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  • Relaying method for remote secure quantum communication
  • Relaying method for remote secure quantum communication
  • Relaying method for remote secure quantum communication

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Embodiment Construction

[0012] See attached figure 1 , the present invention consists of A user terminal 1 and B user terminal 2 and at least one relay station 3 through a quantum channel 4 and a high-speed optical module channel 5 to form a quantum secure communication system, and the relay station 3 is composed of the receiving end of the upper system and the lower level The sending end of the system is composed of phase-encoded BB84 protocols to generate quantum keys that are relatively independent from the front and back stages, and are connected and integrated with multiple point-to-point quantum key distributions, and multiple "point-to-point" quantum keys are distributed The system is connected end to end, and the relay station 3 will encrypt the transmitted information once every time it is connected, and generate a corresponding quantum key. When the quantum key has accumulated to a certain length, the plaintext will be encrypted by A user terminal 1 and sent to the first Relay terminal 3, t...

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Abstract

The invention discloses a relaying method for remote secure quantum communication. The method is characterized in that: at least more than one relay station is arranged on a link for connecting two user terminals by a quantum channel and a high speed optical module channel, generates own relatively more independent key by adopting a phase encoding BB84 protocol, encrypts once transmitted information and generates a corresponding key in the connection of each time, and performs connection and integration by the distribution of a plurality of peer-to-peer keys to realize ultra-long range secure quantum communication. Compared with the prior art, the invention has the advantages of peer-to-peer remote secure quantum communication, high security, high system security and high transmission efficiency; and by the method, the effective transmission range of the quantum communication is greatly prolonged, and the problems of limitations to a single-system secure communication range are solved.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a relay method for remote quantum secret communication. Background technique [0002] Since the second half of the last century, scientists have gradually established the concept of quantum cryptography based on the "Heisenberg Uncertainty Principle" and "Quantum Uncloning Principle". Quantum cryptography uses a single quantum state as an information carrier. Since a single quantum state cannot be cloned, and any measurement operation will change its quantum state, eavesdroppers cannot obtain any valid information without being discovered. In other words, the legal receiver of information can know that there is eavesdropping in the channel from the change of the quantum state, thereby terminating the communication process. Therefore, this method is called a physically "absolutely secure" communication method, and has important research value in various fiel...

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Application Information

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IPC IPC(8): H04L9/08H04B10/16H04B10/29
Inventor 方中华陈杰曾和平
Owner SHANGHAI LANGYAN OPTOELECTRONICS TECH
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