Results 51 to 60 of about 451,706 (170)
Increasing Physical Layer Security through Scrambled Codes and ARQ [PDF]
, 2011 We develop the proposal of non-systematic channel codes on the AWGN wire-tap channel. Such coding technique, based on scrambling, achieves high transmission security with a small degradation of the eavesdropper's channel with respect to the legitimate ...
Baldi, Marco +2 more
core +1 more source
Physical Layer Security Schemes in Space-Integrated-Ground Information Network
天地一体化信息网络, 2020 Firstly, the current mainstream technologies of physical layer security were summarized and the relevant technical indicators were introduced; Then, the research on physical layer security in three typical scenarios of the space-integrated-ground ...
Fangshu MA +3 more
doaj +2 more sources
Information-theoretic Physical Layer Security for Satellite Channels
, 2017 Shannon introduced the classic model of a cryptosystem in 1949, where Eve has access to an identical copy of the cyphertext that Alice sends to Bob. Shannon defined perfect secrecy to be the case when the mutual information between the plaintext and the ...
Hayashi, Masahito +1 more
core +1 more source
Physical Layer Security in Cognitive Millimeter Wave Networks
IEEE Access, 2019 Millimeter wave (mmWave) communications and cognitive radio networks are two key technologies to improve the spectral efficiency. For a cognitive mmWave wiretap network in which randomly located eavesdroppers may reside in the signal beam of the ...
Yi Song +4 more
doaj +1 more source
Physical Layer Security: Coalitional Games for Distributed Cooperation
, 2009 Cooperation between wireless network nodes is a promising technique for improving the physical layer security of wireless transmission, in terms of secrecy capacity, in the presence of multiple eavesdroppers.
Basar, Tamer +4 more
core +2 more sources
Physical layer security of NOMA-D2D cooperative wireless system
Dianxin kexue, 2022 Aiming at the physical layer security (PLS) application requirement of massive user equipments access in the future, the PLS model combining with non-orthogonal multiple access (NOMA), device-to-device (D2D) and relay cooperation was proposed.The model ...
Yifan DING, Guangqiu LI, Hui LI
doaj +2 more sources
Physical Layer Security in Cognitive Untrusted Relay Networks
IEEE Access, 2018 In this paper, we consider the secure communications in a cognitive untrusted relay network, where the secondary source intends to communicate with a secondary destination through an untrusted relay in the presence of the direct source-destination link ...
Dechuan Chen +4 more
doaj +1 more source
Achievable Physical-Layer Security Over Composite Fading Channels
IEEE Access, 2020 We investigate the physical layer security limits of Wyner's wiretap model over Fisher-Snedecor .T composite fading channels. .T fading conditions have been recently shown to provide an accurate characterization of multipath fading and shadowing effects ...
Osamah S. Badarneh +5 more
doaj +1 more source
Enhancing Physical Layer Security in Dual-Hop Multiuser Transmission
, 2016 In this paper, we consider the Physical Layer Security(PLS) problem in orthogonal frequency division multiple access (OFDMA) based dual-hop system which consists of multiple users, multiple amplify and forward relays, and an eavesdropper.
Aman, Waqas +4 more
core +1 more source
Physical-Layer Security over Correlated Erasure Channels
, 2011 We explore the additional security obtained by noise at the physical layer in a wiretap channel model setting. Security enhancements at the physical layer have been proposed recently using a secrecy metric based on the degrees of freedom that an attacker
Almeida, J. +3 more
core +1 more source