29-01-2013, 04:43 PM
Physical Layer Authentication for Mobile Terminals over MIMO Fading Wiretap Channels.
Physical Layer Authentication.ppt (Size: 950 KB / Downloads: 25)
INTRODUCTION
Wireless networks have become an essential part of our daily life.
People rely heavily on wireless networks for transmission of important/private information.
Security is a critical issue in wireless applications.
Precise channel estimation allows authenticating the source and protecting the integrity of a message at the physical layer [4] without the need of a pre-shared secret key.
MOTIVATION
Security is viewed as an independent feature addressed above the physical layer, and all widely used cryptographic protocols. .
However, with the emergence of ad-hoc and decentralized networks, higher-layer techniques, such as encryption, are complex and difficult to implement.
Therefore, there has been a considerable recent attention on studying the fundamental ability of the physical layer to provide secure wireless communications..
OBJECTIVE
Our objective is to develop a scheme to authenticate the legitimate user in mobile environment.
To evaluate the performance of the proposed method in MIMO/OFDM scenario.
Methodology
We will start with the GLRT test. For this we will first derive LLR.
Base paper result is only applicable for stationary Alice. Now we are assuming that Alice is moving with maximum velocity Va.
To approach this we will take the help of [6] where authentication scheme is developed using NP Test.