Results 191 to 200 of about 319,021 (219)

Counterfactual quantum cryptography network with untrusted relay

International Journal of Modern Physics B, 2015
Counterfactual quantum cryptography allows two remote parties to share a secret key even though a physical particle is not in fact transmitted through the quantum channel. In order to extend the scope of counterfactual quantum cryptography, we use an untrusted relay to construct a multi-user network. The implementation issues are discussed to show that
Chen, Yuanyuan, Gu, Xuemei, Jiang, Dong, Xie, Ling, Chen, Lijun   +4 more
openaire   +2 more sources

Secure communication using an untrusted relay via sources and channels

2009 IEEE International Symposium on Information Theory, 2009
Confidential communication aided by a relay without security clearance is studied. General strategies and outer bounds are derived for the problem of secret communication and secret key generation when correlated observations at all terminals are available.
Milosavljevic, Nebojsa, Gastpar, Michael, Ramchandran, Kannan   +2 more
openaire   +3 more sources

Secure Communication With Outdated Channel State Information via Untrusted Relay Capable of Energy Harvesting

IEEE Transactions on Vehicular Technology, 2020
In this paper, we consider secure communication via a wireless-powered untrusted relay with outdated channel state information (CSI). The low security clearance of the relay means that both the source and destination wish to keep information confidential
Jin-Taek Lim, Kisong Lee, Youngnam Han
semanticscholar   +1 more source

Buffer-Aided Relay Selection for Wireless Cooperative Relay Networks with Untrusted Relays

2021 International Conference on Networking and Network Applications (NaNA), 2021
Cheng Zhang, Xuening Liao, Zhenqiang Wu, Guoyong Qiu   +3 more
openaire   +1 more source

ML-Inspired Multiple Relay Selection in UAV-Enabled Untrusted Networks

IEEE Wireless Communications and Networking Conference
In this paper, multiple relay selection (MRS) schemes for untrusted unmanned aerial vehicle (UAV)-enabled networks are proposed. In this context, various machine learning (ML) models are employed to improve secrecy performance by optimally selecting ...
Lefteris Tsipi, Emmanouel T. Michailidis, Konstantinos N. Maliatsos, D. Vouyioukas   +3 more
semanticscholar   +1 more source

Optimization of Aerial Relay Placement and Antenna Selection in Untrusted UAV-Assisted Networks via PSO and Deep Learning

Global Communications Conference
This paper investigates physical-layer security (PLS) in UAV-assisted communication networks featuring an untrusted amplify-and-forward aerial relay. To counter potential eavesdropping threats, a destination-aided jamming strategy is employed.
Lefteris Tsipi, Emmanouel T. Michailidis, Nektarios Moraitis, D. Vouyioukas   +3 more
semanticscholar   +1 more source

Link adaptation for fixed relaying with untrusted relays: Transmission strategy design and performance analysis

2011 18th International Conference on Telecommunications, 2011
Wireless cooperative communication through link adaptation with untrusted relay assignment is considered. Using sharp channel codes in different transmission modes, reliability for destination and security in the presence of untrusted relays are provided through rate and power allocation. Scenarios with single available relay and opportunistic relaying
Hamid Khodakarami, Farshad Lahouti
openaire   +2 more sources

Cross-layer security in two-hop wireless Gaussian relay network with untrusted relays

2013 IEEE International Conference on Communications (ICC), 2013
This paper deals with the challenge of providing information-theoretic secrecy in a two-hop wireless channel with multiple untrusted relay nodes. Instead of perfect secrecy (in the information-theoretic sense), of interest here is a cross-layer approach where only parts of relayed information are protected at the physical layer against eavesdropping at
Michal Kaliszan, Jafar Mohammadi, Slawomir Stanczak   +2 more
openaire   +2 more sources

Partial Relay Selection for Secure Outdated-CSI AF in Untrusted-Relay Networks

2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC), 2019
In this paper, we study secure outdated-channelstate-information amplify-and-forward (SO-CSI-AF) relaying network using partial relay selection method. The best relay node is chosen based on the maximum instantaneous signal-tonoise ratio (SNR) of the first hop.
openaire   +1 more source

Physical-Layer Secret Key Generation With Colluding Untrusted Relays

IEEE Transactions on Wireless Communications, 2016
In this paper, we propose a physical-layer secret key generation scheme for multiantenna legitimate nodes with the help of multiple untrusted relays, equipped with multiple antennas. The untrusted relays conform to the relaying transmission protocol of legitimate nodes, but they also eavesdrop the confidential information of an legitimate transmitter ...
Chan Dai Truyen Thai, Jemin Lee, Tony Q. S. Quek   +2 more
openaire   +2 more sources