Physical Layer Security in Wireless Networks

Introduction

The physical-layer security under the information-theoretic (perfect) security models can get exponentially close to perfect secrecy in theory. However, the information-theoretic security is an average-information measure. The system can be designed and tuned for a specific level of security¡ªe.g., with very high probability a block is secure, but it may not be able to guarantee security with probability one. So any deployment of a physical-layer security protocol in a classical system would be part of a ¡°layered security¡± solution where security is provided at a number of different layers, each with a specific goal in mind. The physical-layer security can provide an additional layer of security for wireless networks. We investigate a novel multiple input multiple output (MIMO) aided security scheme. By exploiting an extra dimension provided by MIMO systems for adding artificial noise to the transmission process, which let the attacker¡¯s signal be a degraded version of the legitimate receiver¡¯s signal, the physical-layer security is enhanced as a result. We also investigate a novel framework for Physical layer Assisted message Authentication (PAA) under public key infrastructure (PKI) in wireless communication networks.

Research topics

  • Finding practical method to build the wire-tap channel model for MIMO and single input single output (SISO) system.
  • Developing the wire-tap channel code close to capacity.
  • Exploring to build a cross-layer framework for achieving fast and light-weighted message authentication for wireless networks in virtue of physical layer assisted message Authentication.
Last updated: July 09, 2019