A Network Coding Against Wiretapping Attacks of the Physical Layer Security Based on LDPC Code
The secure transmission of wireless network information has received wide attention. To solve Hacking threat problems that exist in the wireless network, this paper presented a construction method which is based on the classic Low-Density Parity-Check (LDPC) encoding method, the transmission model of the physical security was studied, and the safe transmission scheme was developed under the gaussian eavesdropping channel, the code with a nested structure was designed, and the random selection of code words was determined, message processing is carried out through an improved large-column weight and low complexity check matrix, not only effectively reduce the requirement for storage space and the complexity of the information processing, but also effectively decrease the error rate of the system. Simulation experiments and comparative analysis show that the bit error rate (BER) of the encoding method in this paper is significantly lower than that of Progressive Edge Growth (PEG) algorithm, which achieves the anti-eavesdropping effect.
KeywordsLDPC Physical layer security Network coding Eavesdropping
This work was financially supported by the Science and Technology Commission of Shanghai Municipality of China under Grant (No. 17511107002).
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