PROJECT TITLE :

Physical-Layer Secret Key Generation With Colluding Untrusted Relays - 2016

ABSTRACT:

During this paper, we tend to propose a physical-layer secret key generation scheme for multiantenna legitimate nodes with the assistance 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 data of an legitimate transmitter. The key generation scheme is meant with zero forcing (ZF) and minimum mean square error (MMSE) channel estimators for non-, partially, and absolutely colluding modes of untrusted relays. Furthermore, we tend to propose a theme adaptive to channel coherence time. Specifically, to realize a better secret key rate (SKR) within the channel coherence time, the quantity of relay and legitimate nodes' antennas are optimally determined and the foremost appropriate antennas are selected for the key generation. Our results show that the proposed scheme achieves the next SKR than a previous work, and non- and partially colluding modes provide a higher SKR than the absolutely colluding mode through the proposed scheme. We have a tendency to also verify that exploiting a lot of antennas of untrusted relays does not forever enhance the SKR by showing the existence of the optimal number of antennas of the relays taking part in the scheme.