A Secure Multiple-Access Scheme for Rechargeable Wireless Sensors in the Presence of an Eavesdropper

TL;DR

This paper introduces a secure multiple-access communication scheme for energy-harvesting wireless sensors that maximizes secrecy sum-throughput while considering energy constraints and eavesdropper threats.

Contribution

It presents a novel multiple-access scheme tailored for energy-harvesting sensors that enhances security and efficiency in the presence of eavesdroppers.

Findings

The scheme effectively increases secrecy sum-throughput.

It demonstrates energy-efficient secure communication.

The approach is suitable for energy-limited sensor networks.

Abstract

We propose a simple yet efficient scheme for a set of energy-harvesting sensors to establish secure communication with a common destination (a master node). An eavesdropper attempts to decode the data sent from the sensors to their common destination. We assume a single modulation scheme that can be implemented efficiently for energy-limited applications. We design a multiple-access scheme for the sensors under secrecy and limited-energy constraints. In a given time slot, each energy-harvesting sensor chooses between sending its packet or remaining idle. The destination assigns a set of data time slots to each sensor. The optimization problem is formulated to maximize the secrecy sum-throughput.