Transmitting end and receiving end of secure communication system

Abstract

The invention discloses a transmitting end and a receiving end of a secret communication system. The transmitting end includes a main laser, an external cavity of the main laser and an information encryption module. The external cavity of the main laser has a feedback cavity, and the laser emitted by the main laser passes through the feedback cavity to form a feedback loop, so that the main laser works in a chaotic state. A phase modulator is arranged in the feedback loop of the laser, and the phase modulator performs phase modulation on the light in the feedback loop according to the phase key, and the phase key is a pseudo-random sequence. The chaotic laser signal sent by the main laser working in the chaotic state is sent out through the information encryption module. Only when the laser at the receiving end has the same feedback structure and phase modulation as the main laser can it correctly demodulate the information. At the same time, the multi-feedback external cavity with high-speed phase modulation can also hide the time-delay tag of the chaotic laser, improving the security of the communication system.

Description

technical field [0001] The invention relates to the field of secure communication, in particular to a transmitting end and a receiving end of a secure communication system. Background technique [0002] With the rapid development of computer and communication technology, and the advent of the Internet + era, the openness, interconnection, and sharing of the network are rapidly expanding, and human beings are increasingly dependent on the network, resulting in information security risks. There are also more and more, and information security has become one of the important issues of concern to the world. The Fifth Plenary Session of the 18th Central Committee of my country clearly included the "network power strategy" into the strategic system of the "13th Five-Year Plan". Chaotic secure communication technology has attracted extensive attention because it can provide efficient physical layer security. However, in the current application and research of chaos-based communicati...

AI Technical Summary

Problems solved by technology

Chaotic secure communication technology has attracted extensive attention because it can provide efficient physical layer security. However, in the current application and research of chaos-based communication systems, it is found that existing laser-based secure communication systems have time-delayed label leakage. Chaotic semiconductor lasers Potential safety hazards such as the external cavity structure have seriously affected the security performance of the secure communication system based on chaotic laser signals. Therefore, research on the security-enhanced chaotic secure communication system plays an important role in information security.

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