Chaotic laser communication system with high secrecy space

Abstract

The invention discloses a chaotic laser communication system with a high secrecy space, comprising a transmitting end, a receiving end and a temperature control system. The transmitting end and the receiving end adopt an opto-feedback type structure; encryption on the hardware is used for realizing chaotic synchronization and information demodulation. The temperature control system realizes the synchronous and real-time control of the temperature of a Mach-Zehnder electro-optic modulator at the transmitting end and the receiving end through the terminal and the control modules of the transmitting end and the receiving end. Since the temperature of the modulator changes dynamically during communication, the difficulty for an eavesdropping party to crack information is increased as mismatchof the temperature of the modulator causes mismatch of a modulator operating point, which further makes the error rate increase even in the case that other parameters of the chaotic system are cracked. The chaotic laser communication system with high secrecy space in the invention can improve the secrecy performance of the existing chaotic system and has important significance for national defensesecurity and information security.

Description

technical field [0001] The invention belongs to the technical field of secure communication, in particular to a space chaotic laser communication system with high security. Background technique [0002] With the development of modern communication technology, deciphering and decryption technology has also developed. In recent years, it has become possible to steal information from traditional optical fiber communication systems and recover and extract them. The security of traditional optical fiber communication systems has been challenged. . In this case, higher requirements are put forward for the confidentiality of the communication system. Especially in the field of national defense, the research on secure communication is even more important. [0003] As a kind of secure communication, chaos communication is an encryption technology based on the physical layer, which uses transceivers with the same structure and parameters to generate the same chaotic carrier wave to ...

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Problems solved by technology

[0002] With the development of modern communication technology, deciphering and decryption technology has also developed. In recent years, it has become possible to steal information from traditional optical fiber communication systems and restore and extract them. The security of traditional optical fiber communication systems has been challenged.

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