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Multichannel information hidden communication method and device, communication terminal and storage medium

A covert communication and signal technology, applied in the field of communication, can solve the problem of inability to hide information demodulation and recovery.

Active Publication Date: 2018-12-07
SUZHOU INDAL PARK INST OF SERVICES OUTSOURCING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a multi-channel information concealed communication method, device, communication terminal and storage medium to solve the technical problem in the prior art that the hidden information in multi-channel general signals cannot be demodulated and recovered

Method used

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  • Multichannel information hidden communication method and device, communication terminal and storage medium
  • Multichannel information hidden communication method and device, communication terminal and storage medium
  • Multichannel information hidden communication method and device, communication terminal and storage medium

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Experimental program
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Embodiment 1

[0061] figure 2 It is a flowchart of a concealed communication method for multi-channel information provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation where the hidden information contained in multiple general signals is demodulated and recovered at the receiver end. The method can be executed by a multi-channel information covert communication device, and the multi-channel information covert communication device can be integrated in a covert communication device through software and / or hardware. Generally speaking, a covert communication device includes a data sending end device and a data receiving end device, wherein the sending end device is marked as a sender end, and the receiving end device is marked as a receiver end. In practical application, the covert communication device can have the function of transmitter and receiver at the same time. In this embodiment, the covert communication device is used as the receiver for ...

Embodiment 2

[0086] image 3 It is a flowchart of a multi-channel information concealed communication method provided by Embodiment 2 of the present invention, and this embodiment is embodied on the basis of the foregoing embodiments. The covert communication method of this embodiment specifically includes the following steps:

[0087] S210. Receive the first modulated signal sent by the transmitter.

[0088] S220. Perform demodulation and restoration on the first modulated signal to generate a first demodulated signal.

[0089] Wherein, the first demodulated signal is a multi-channel mixed signal.

[0090] S230. Despread the first demodulated signal by using the first spreading code to obtain multiple channels of first despread signals.

[0091] Wherein, each first despread signal corresponds to a set of first spreading codes, the first spreading codes are original code groups, the original code groups are a row of vectors in a preset matrix, and the preset matrix is ​​a Walsh matrix o...

Embodiment 3

[0106] Figure 4 It is a flow chart of a concealed communication method for multi-channel information provided by Embodiment 3 of the present invention. This embodiment is applicable to the situation where the concealed information contained in multiple general signals is demodulated and recovered at the transmitter end. The method can be performed by a covert communication device for multiple information, and the covert communication device for multiple information can be integrated in a covert communication device through software and / or hardware. In this embodiment, the covert communication device is used as the transmitter Description on the machine side.

[0107] refer to Figure 4 , the covert communication method of the multi-channel information specifically includes the following steps:

[0108] S310. Determine a second spreading code according to a preset hidden signal in the signal to be transmitted.

[0109] Wherein, each signal to be transmitted corresponds to a...

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Abstract

The invention discloses a multichannel information hidden communication method and device, a communication terminal and a storage medium. The method is applied to a receiver end, and specifically includes: receiving a first modulated signal sent by a transmitter end; demodulating and restoring the first modulated signal to generate a first demodulated signal, wherein the first demodulated signal is a multichannel mixed signal; de-spreading the first demodulated signal by using a first spreading code to obtain multiple first de-spread signals each of which corresponds to a group of first spreading codes; and subjecting each first de-spread signal to predetermined determination to obtain a baseband signal and a preset hidden signal corresponding to each of the first de-spread signals. The method solves the technical problem in the prior art that multiple general signals having hidden information cannot be demodulated and restored, and achieves a technical effect of correctly demodulatingand restoring the hidden information in the multiple general signals at the receiver end.

Description

technical field [0001] The embodiments of the present invention relate to communication technologies, and in particular to a method, device, communication terminal and storage medium for concealed communication of multi-channel information. Background technique [0002] Information hiding technology is a multidisciplinary interdisciplinary research topic integrating mathematics, image science, information theory and computer network, covering the research and application directions of signal processing, digital communication, pattern recognition of information security and other professional technologies. [0003] At present, in the process of information transmission, in order to prevent the interceptor from identifying and judging the signal containing secret information from among the numerous information, the secret information is generally hidden in the general signal. Since a signal containing secret information looks similar to a general signal, the security of inform...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04J13/00
CPCH04B1/707H04J13/004H04J13/0048
Inventor 查艳芳
Owner SUZHOU INDAL PARK INST OF SERVICES OUTSOURCING
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