High-speed security secret key distribution system and method based on chaotic laser coherent keying

Abstract

The invention, which belongs to the field of key distribution technology in secret communication, in particular relates to a high-speed security secret key distribution system and method based on chaotic laser coherent keying. The system is composed of an Alice communication side and a Bob communication side. The Alice communication side consists of a first laser device, a first private key module, a first optical switch, a first power meter, a first polarization controller, a first fiber delay line, a second fiber delay line, and a first 1*2 fiber coupler. The Bob communication side includesa second laser device, a second private key module, a second optical switch, a second power meter, a second polarization controller, a third fiber delay line, a fourth fiber delay line, and a second 1*2 A fiber coupler. Besides, the high-speed security secret key distribution system is also composed of a 2*2 fiber coupler, a first attenuator, a second attenuator, a circulator, and a third laser device. The high-speed security secret key distribution system and method have the following beneficial effects: the two communication sides do not need to carry out private key exchanging at a public channel and a chaotic laser signal has no time delay feature, so that the secret key distribution safety is improved and the security secret key distribution rate is increased.

Description

technical field [0001] The invention belongs to the technical field of key distribution in secure communication, and relates to a safe and high-speed key distribution system, in particular to a high-speed key security distribution system and method based on chaotic laser coherent keying. Background technique [0002] Confidential communications are related to national stability, property security, privacy protection and many other aspects. Absolutely safe confidential communication is the goal that human beings have been pursuing. [0003] Shannon's theory proves that using a completely random key whose length is not shorter than the length of the plaintext to encrypt the plaintext can achieve absolutely secure confidential communication when the key is used only once (abbreviated as "one-time pad") . To realize this unconditionally secure confidential communication, the following two conditions are required: (1) be able to generate high-speed random keys; (2) be able to r...

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Problems solved by technology

[0011] The purpose of the present invention is to solve the problem of poor security or low distribution rate in existing key distribution cases, and provide a high-speed key security distribution system and method based on chaotic laser coherent keying

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