Cooperative backscatter covert communication system and communication method

A technology of backscattering and covert communication, applied in the fields of communication, electronics, and information security, can solve the problems of power consumption and power consumption of covert communication equipment, and achieve the effect of reducing the probability of detection, the volume and the small transmission power.

Active Publication Date: 2022-04-26
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Cooperative backscatter covert communication system and communication method
  • Cooperative backscatter covert communication system and communication method
  • Cooperative backscatter covert communication system and communication method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0046] Embodiment 1: A cooperative backscatter covert communication system, such as figure 1 shown, including:

[0047]1) A dedicated radio frequency signal transmitting device (RFsource), which maintains the state of broadcast transmission for a long time, and the transmission content is conventional unclassified information. Built-in interference signal generation module, the interference signal generation module can continuously generate pseudo-Rayleigh fading signal of rated power and superimpose on the original radio frequency signal to form interference radio frequency signal, the radio frequency signal transmitting device is shared with all backscattering equipment and backscattering equipment The same communication codebook, the communication codebook specifically includes the signal modulation method of the backscattering device, the communication time slot of each backscattering device, the backscattering frame format, etc., wherein the communication time slot of eac...

Embodiment 2

[0081] Embodiment 2: A cooperative backscatter covert communication method, specifically including:

[0082] 1) The radio frequency signal transmitting device continuously transmits radio frequency signals containing interference, and misleads the detection party to set a higher covert communication detection threshold when the detection party does not have all prior knowledge;

[0083] 2) The backscatter device obtains energy from the signal of the radio frequency signal transmitter to maintain the standby state;

[0084] 3) The radio frequency signal transmitting device cancels the interference signal generation in a specific time slot according to the established communication codebook, and the backscatter device BD modulates the received original radio frequency signal in a specific time slot when the radio frequency signal transmitting device stops sending the interfering radio frequency signal , and send the modulated signal (ie, covert information) to the backscatter re...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/22H04K1/02
CPCH04B7/22H04K1/02
Inventor 吉小鹏陈妍秋乔森贺鑫锐
Owner NANJING UNIV OF INFORMATION SCI & TECH
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