A gbps physical key security distribution system

Abstract

The invention belongs to the technical field of secure communication, and discloses a Gbps physical key security distribution system, comprising a first laser, a second laser, a first semiconductor laser and a second semiconductor laser; the signal output by the first laser is controlled by the first polarization After the single-mode fiber and the first fiber coupler, it is incident from one end of the single-mode fiber, and injected into the second semiconductor laser to generate chaotic laser after passing through the single-mode fiber and the second fiber coupler; the signal output by the second laser is passed through the second polarization controller, the first After the second fiber coupler, it is incident from the other end of the single-mode fiber, and after passing through the single-mode fiber and the first fiber coupler, it is injected into the first semiconductor laser to generate chaotic laser, and the chaotic laser signals output by the first semiconductor laser and the second semiconductor laser are passed through respectively. The photoelectric detector detects, and the analog-to-digital converter converts it into a random number sequence and stores it in the memory. The invention ensures the security of key distribution and realizes high-speed physical key security distribution.

Description

Technical field [0001] The present invention belongs to the field of confidential communication technology, involving key distribution, specifically a Gbps physical key security distribution system. Background [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. China began to build a 100Gbps backbone optical fiber communication network in 2014, and began to deploy gigabit (Gbps) broadband access networks in 2019, which urgently needs Gbps high-speed information confidential transmission. According to Shannon's "one secret at a time" theory, secure and confidential communication requires that both parties to the communication have the same true random number as the key, and its rate is not lower than the data rate, and it cannot be reused. It can be seen that the root of high-speed confidential transmission lies in the gbps key generation and distribution tech...

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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