Visible to the public Physical-Layer Security with Finite Blocklength over Slow Fading Channels

TitlePhysical-Layer Security with Finite Blocklength over Slow Fading Channels
Publication TypeConference Paper
Year of Publication2020
AuthorsZheng, T., Liu, H., Wang, Z., Yang, Q., Wang, H.
Conference Name2020 International Conference on Computing, Networking and Communications (ICNC)
Keywordsadaptive optimization schemes, channel coding, code rates, composability, critical secrecy rate, fading channels, finite blocklength, finite-blocklength secrecy coding, instantaneous channel state information, legitimate user pair coexisting, Metrics, nonadaptive optimization schemes, Optimization, physical-layer security, pubcrawl, reliability, Resiliency, secrecy throughput, slow fading channels, ST, statistical analysis, statistical channel state information, telecommunication network reliability, telecommunication security, transmission policy, wiretap code
AbstractThis paper studies physical-layer security over slow fading channels, considering the impact of finite-blocklength secrecy coding. A comprehensive analysis and optimization framework is established to investigate the secrecy throughput (ST) of a legitimate user pair coexisting with an eavesdropper. Specifically, we devise both adaptive and non-adaptive optimization schemes to maximize the ST, where we derive optimal parameters including the transmission policy, blocklength, and code rates based on the instantaneous and statistical channel state information of the legitimate pair, respectively. Various important insights are provided. In particular, 1) increasing blocklength improves both reliability and secrecy with our transmission policy; 2) ST monotonically increases with blocklength; 3) ST initially increases and then decreases with secrecy rate, and there exists a critical secrecy rate that maximizes the ST. Numerical results are presented to verify theoretical findings.
Citation Keyzheng_physical-layer_2020