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Self-adaption covert communication method based on satellite channel coding

A covert communication and satellite channel technology, which is applied in the field of satellite communication, can solve the problems of satellite communication signal error code interference, destroying hidden information, etc., and achieve the effects of enhancing security, increasing reliability, and facilitating function upgrades and expansions

Inactive Publication Date: 2013-12-25
INST OF SOFTWARE - CHINESE ACAD OF SCI
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Problems solved by technology

And because the satellite communication signal is interfered by the bit error of the communication link, it may destroy the hidden information in it

Method used

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  • Self-adaption covert communication method based on satellite channel coding
  • Self-adaption covert communication method based on satellite channel coding
  • Self-adaption covert communication method based on satellite channel coding

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Embodiment Construction

[0024] Such as figure 1 Shown is the satellite channel covert communication model proposed by the method of the present invention. The model includes 8 main modules, which are channel coding module and channel decoding module, error correction coding module and error correction decoding module, secret information embedding module and secret information extraction module, satellite channel module, channel capacity adaptive module . The functional requirements of each module are as follows:

[0025] 1) Channel coding module

[0026] The channel coding module is located at the sending end. This module performs channel coding on the input source data, adding data redundancy to enhance the ability of the source data to resist channel errors. Then the coded data is transmitted to the receiving end through the satellite channel module.

[0027] 2) Channel decoding module

[0028] The channel decoding module is located at the receiving end. This module and the channel coding modu...

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Abstract

The invention provides a self-adaption covert communication method based on satellite channel coding, and directing at different channel encoding algorithms of block codes, RS codes, convolutional codes, serial concatenated code and the like, provides a capacity self-adaption method for secrete information embedding; further provides a channel encoding information embedding and extracting algorithm based on m sequences. By the utilization of the self-adaption covert communication method, the capacity of covert channels can be determined in a self-adaption mode according to different used channel encoding algorithms and different used communication environments; normal use of carriers containing secretes is not influenced, and main steganalysis attacks such as chi-square analysis attacks and RS analysis attacks can be resisted; under the condition that the satellite channel bit error rate is 10-3-10-5, quasi error-free transmission of secrete information can be realized.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to an adaptive covert communication method based on satellite channel coding. Background technique [0002] With the continuous development of communication technology, satellite channel covert communication can be used for the safe distribution of secret instructions, and can also be used for information transmission through open channels. The listener can only monitor the channel that transmits public information, but cannot discover the communication process that transmits secret information. Covert communication effectively protects intelligence information transmission and security. [0003] The satellite communication scene usually adopts the situation of "transparent" elbow forwarding. The communication signal is subjected to low-noise amplification, frequency conversion and power amplification on the transparent transponder of the satellite, without any proc...

Claims

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Application Information

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IPC IPC(8): H04W12/02H04L1/00
Inventor 马恒太易小伟郑昌文潘辉李明宇朱登科
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI
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