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Application of Quantum Resistant Cryptography to Smart Grid deployments

David Domingo Martín, Rodrigo Martín Sánchez-Ledesma, Marta Irene García Cid

Published Apr 7, 2026• 0 citations
Publisher
DOI
10.5281/zenodo.19452398

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The increasing integration of smart grids within the Internet of Things (IoT) ecosystem requires the implementation of robust security measures due to vulnerabilities brought about by pervasive connectivity. Previous smart grid security protocols are based on classical cryptographic algorithms, which are susceptible to significant threats from emerging quantum computers. Consequently, the adoption of quantum-resistant solutions is imperative for the long-term security of smart grids. This article presents a novel protocol for authentication and secret key establishment in smart grids, utilizing post-quantum cryptography (PQC) algorithms. Our proposed protocol employs the FALCON digital signature algorithm for integrity verification and the CRYSTALS-Kyber key encapsulation mechanism (KEM) for secret key establishment, providing robust protection against quantum attacks. Our optimized implementation of the proposed protocol on a graphics processing unit (GPU) targets grid security module (GSM)/gateway-side deployments and demonstrates scalability under large numbers of concurrent authentication requests. Experimental validation demonstrates the proposed protocol’s ability to effectively manage numerous concurrent authentication requests, ensuring secure and efficient communication within smart grid networks.
As cities adopt integrated IoT ecosystems and data-driven urban governance, traditional encryption faces the threat of obsolescence by quantum computing attacks. This chapter explores the application of quantum cryptography in protecting smart urban infrastructure, with a focus on quantum key distribution (QKD), post-quantum algorithms, and hybrid systems. Through an examination of deployments in smart grids, traffic management systems, and public health platforms, we illustrate how quantum-resistant protocols reduce threats of data breaches and spoofing attacks. There are special challenges: scaling QKD to millions of IoT devices will need new network architectures, and integrating with legacy systems will need phased “crypto-agility” plans. The chapter presents a model for incorporating quantum-safe practice into urban design, with an emphasis on inter-disciplinary collaboration among cryptographers, policymakers, and city administrators.