Authentication of Smart Grid Communications using Quantum Key Distribution

TL;DR

This paper demonstrates the first practical use of quantum key distribution for authenticating smart grid communications over a real utility fiber network, enhancing cybersecurity for critical infrastructure.

Contribution

It introduces a novel method integrating QKD with smart grid communication authentication, tested on an actual deployed electric utility network.

Findings

Successful implementation of QKD-based authentication in a real-world smart grid network

Prototyped software for managing cryptographic keys in SCADA systems

Shows feasibility of quantum-enhanced security for future energy infrastructure

Abstract

Smart grid solutions enable utilities and customers to better monitor and control energy use via information and communications technology. Information technology is intended to improve the future electric grid's reliability, efficiency, and sustainability by implementing advanced monitoring and control systems. However, leveraging modern communications systems also makes the grid vulnerable to cyberattacks. Here we report the first use of quantum key distribution (QKD) keys in the authentication of smart grid communications. In particular, we make such demonstration on a deployed electric utility fiber network. The developed method was prototyped in a software package to manage and utilize cryptographic keys to authenticate machine-to-machine communications used for supervisory control and data acquisition (SCADA). This demonstration showcases the feasibility of using QKD to improve the security of critical infrastructure, including future distributed energy resources (DERs), such as energy storage.