Analysis and Research on Secondary LT Coding Anti-Eavesdropping Scheme Based on LT Code Degree-1

• Published in: Applied sciences Vol. 13; no. 20; p. 11296
• Main Authors: Wang, Lizheng, Niu, Fanglin, Jin, Jingjing, Yu, Ling
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.10.2023
• Subjects: Analysis; anti-eavesdropping; Codes; delete channel; eavesdropping channel; Efficiency; Electronic surveillance; Energy consumption; Information management; Information theory; LT code; physical layer security; Safety and security measures; Signal to noise ratio; Wireless communications; Wireless networks
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app132011296

Fountain code can significantly increase eavesdroppers’ untranslated efficiency in the wireless communication eavesdropping channel. The secondary LT coding anti-eavesdropping scheme with fountain code degree-1 is the subject of a theoretical investigation in this paper. The fact that its channel security capacity is greater than that of traditional LT code is first deduced from an information-theoretic standpoint, and the impact of source symbol length on decoding complexity and decoding overhead is then examined. The experimental results show that, compared with the traditional anti-eavesdropping twice fountain code, selecting long source symbols for double LT coding, when the main channel is better than the eavesdropping channel, can ensure that the eavesdropper has a higher untranslated efficiency, and can effectively reduce the fountain code decoding complexity and the number of encoded symbols sent by the source to improve the efficiency of information transmission.