Gbps physical key secure distribution system

Abstract

The invention belongs to the technical field of secret communication, and discloses a Gbps physical key secure distribution system, which comprises a first laser, a second laser, a first semiconductorlaser and a second semiconductor laser; wherein a signal output by the first laser passes through the first polarization controller and the first optical fiber coupler, enters from one end of the single-mode optical fiber, passes through the single-mode optical fiber and the second optical fiber coupler, and is injected into the second semiconductor laser to generate chaotic laser; a signal output by the second laser passes through the second polarization controller and the second optical fiber coupler, enters from the other end of the single-mode optical fiber, passes through the single-modeoptical fiber and the first optical fiber coupler, and is injected into the first semiconductor laser to generate chaotic laser; and then chaotic laser signals output by the first semiconductor laserand the second semiconductor laser are respectively detected by the photoelectric detector and converted into random number sequences by the analog-to-digital converter to be stored in the memory. According to the invention, the security of secret key distribution is ensured, and high-speed physical secret key security distribution is realized.

Description

technical field [0001] The invention belongs to the technical field of secure communication and relates to key distribution, in particular to a Gbps physical key security distribution system. Background technique [0002] The secure transmission of information is the key to network security and an important guarantee for national security and economic security in the information age. my country began to build a 100Gbps backbone optical fiber communication network in 2014, and began to deploy a gigabit (Gbps) broadband access network in 2019. There is an urgent need for Gbps high-speed information confidential transmission. According to Shannon's "one-time pad" theory, secure and confidential communication requires both communicating parties to have the same true random number as the key, whose rate is not lower than the data rate and cannot be reused. It can be seen that the foundation of high-speed secure transmission lies in the Gbps key generation and distribution techno...

AI Technical Summary

Problems solved by technology

[0015] Aiming at the problem that none of the key distribution schemes in the prior art can take into account the key distribution rate and security, the present invention overcomes the deficiencies in the prior art, and the technical problem to be solved is: to provide a Gbps physical key security distribution system

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