Cooperative backscatter covert communication system and communication method

Abstract

The invention discloses a cooperative backscatter covert communication system and a communication method. The system includes a radio frequency signal transmitting device, a plurality of backscattering devices and a plurality of backscattering receivers. The radio frequency signal transmitting device transmits the interference signal, and closes the interference signal generating module in the agreed time slot. The backscatter device transmits covert information in the closed time slot of the jamming signal generating module. The backscatter receiver keeps receiving the covert information delivered by the backscatter device. In the present invention, the radio frequency signal transmitting device is only responsible for transmitting conventional signals superimposed with artificial interference, and does not involve concealed communication content, and will not be detected. The backscatter device is responsible for transmitting signals. It has no battery or fixed power supply, is not restricted by location, and has a small volume and transmission power, which greatly reduces the probability of covert communication being detected. The present invention uses backscatter communication to eliminate the need for any active radio frequency components, thereby extending the useful life and continuous communication capability of wireless devices.

Description

technical field [0001] The invention relates to a cooperative backscatter covert communication system and a communication method, belonging to the technical fields of electronics, communication, information security and the like. Background technique [0002] Wireless covert communication, as a special communication method with concealment as the main pursuit, involves new information theory issues such as covert channel capacity analysis in various scenarios, and a series of information hiding methods with wireless communication as the background. It has important application prospects in military communication, intelligence communication in physically isolated environment and other fields. [0003] At present, encryption methods are usually used to protect or hide communication content, but when communication behavior needs to be hidden, simple protocol encryption no longer meets the demand, and covert communication equipment or systems need to be used. Keeping covert com...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem that the current covert communication equipment has huge power loss and power demand, and fixed power lines or frequent battery replacement will bring great exposure risks, this invention proposes a cooperative backscatter covert communication systems and methods

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