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ITNOW

Post Quantum Cryptography Explained

Bill Buchanan

Published Jan 1, 2024• 0 citations
Publisher

Abstract

Abstract Professor Bill Buchanan OBE FRSE considers the impact of advancements in quantum computing on cryptography and explores the methods available for safeguarding data.
DOI
10.1093/itnow/bwae114

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Quantum computing is rapidly advancing, with significant implications for cybersecurity. While it holds the potential to revolutionize computation, it also poses a threat to current cryptographic systems. This tutorial introduces the fundamentals of quantum computing, explores the state of quantum software engineering, and examines the impact of quantum advancements on cryptography and cybersecurity. It will also discuss post-quantum cryptography (PQC) and strategies for transitioning to quantum-resistant cryptographic systems. The session will provide both theoretical insights and practical guidance for cybersecurity professionals preparing for dependable systems and networks in a post-quantum future.
Quantum computers are capable of solving problems that classical computers cannot, particularly in the realm of cryptographic algorithms such as RSA, DSA, and ECC. Post quantum cryptography refers classical cryptographic algorithm that are designed to secure sensitive data. This research explores the application of post-quantum cryptographic techniques in healthcare systems, with a specific focus on integrating Quantum Key Distribution (QKD) with Genetic Algorithms (GA) for enhanced key optimization. As quantum computing advances, traditional cryptographic systems employed in health care are more and more vulnerable to being broken. Security of sensitive patient information—like electronic health records (EHRs), diagnostic data, and personally identifiable information— requires strong solutions that can handle future quantum attacks. Post-quantum cryptography (PQC) provides a hopeful way forward by employing quantum computer-resistant algorithms. This paper investigates the deployment of PQC methods—e.g., lattice-based, hash-based, and multivariate polynomial cryptography—inside healthcare systems to improve data confidentiality, integrity, and availability. It assesses the weaknesses of present encryption technologies and introduces PQC as a necessary update to protect patient information from sophisticated cyberattacks. The study also addresses the interoperability, computational overhead, and infrastructure readiness challenges of implementing PQC in healthcare. By implementing quantum-resilient cryptographic protocols, healthcare facilities are able to future-proof data protection practices and guarantee the safeguarding of patient data in an era governed by quantum computing.