Transmitting terminal and receiving terminal of secure communication system

Abstract

The invention discloses a transmitting terminal and a receiving terminal of a secure communication system. The transmitting terminal comprises a main laser, an external cavity of the main laser and an information encryption module, the external cavity of the main laser is provided with a feedback cavity, and the laser emitted by the main laser forms a feedback loop after passing through the feedback cavity, so that the main laser works in a chaotic state. A phase modulator is arranged in the feedback loop of the laser, the phase modulator performs phase modulation on the light in the feedback loop according to a phase key, and the phase key is a pseudo-random sequence. A chaotic laser signal emitted by the main laser working in the chaotic state is transmitted by the information encryption module. Only when the laser of the receiving terminal has the same feedback structure and phase modulation as the main laser, the information can be correctly demodulated. Meanwhile, a plurality of feedback external cavities of high-speed phase modulation can also hide a delay tag of chaotic laser, and thus the security of the communication system is improved.

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 s

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