Network-Controlled Physical-Layer Security: Enhancing Secrecy Through Friendly Jamming

TL;DR

This paper explores how network-controlled friendly jamming can improve physical-layer security in wireless networks by optimizing secrecy capacity through intelligent access point selection and jamming strategies.

Contribution

It introduces a new system model and a novel secrecy capacity optimization algorithm combining AP selection with friendly jamming.

Findings

Secrecy capacity is enhanced using friendly jamming.

The proposed algorithm optimizes AP selection and jamming for better security.

System model supports implementation with off-the-shelf equipment.

Abstract

The broadcasting nature of the wireless medium makes exposure to eavesdroppers a potential threat. Physical Layer Security (PLS) has been widely recognized as a promising security measure complementary to encryption. It has recently been demonstrated that PLS can be implemented using off-the-shelf equipment by spectrum-programming enhanced Software-Defined Networking (SDN), where a network controller is able to execute intelligent access point (AP) selection algorithms such that PLS can be achieved and secrecy capacity optimized. In this paper, we provide a basic system model for such implementations. We also introduce a novel secrecy capacity optimization algorithm, in which we combine intelligent AP selection with the addition of Friendly Jamming (FJ) by the not-selected AP.