We review the current status of efforts to develop and deploy post-quantum cryptography on the Internet. Then we suggest specific ways in which quantum technologies might be used to enhance cybersecurity in the near future and beyond. We focus on two goals: protecting the secret keys that are used in classical cryptography, and ensuring the trustworthiness of quantum computations. These goals may soon be within reach, thanks to recent progress in both theory and experiment. This progress includes interactive protocols for testing quantumness as well as for performing uncloneable cryptographic computations; and experimental demonstrations of device-independent random number generators, device-independent quantum key distribution, quantum memories, and analog quantum simulators.
We review the current status of efforts to develop and deploy post-quantum cryptography on the Internet. Then we suggest specific ways in which quantum technologies might be used to enhance cybersecurity in the near future and beyond. We focus on two goals: protecting the secret keys that are used in classical cryptography, and ensuring the trustworthiness of quantum computations. These goals may soon be within reach, thanks to recent progress in both theory and experiment. This progress includes interactive protocols for testing quantumness as well as for performing uncloneable cryptographic computations; and experimental demonstrations of device-independent random number generators, device-independent quantum key distribution, quantum memories, and analog quantum simulators.
Using a systematic literature review methodology comprising the following stages: Identification of Relevant Literature, Screening and Selection, Data Extraction and Synthesis, Qualitative Analysis, and SWOT Analysis, this paper explores the role of quantum cryptography in enhancing cybersecurity. The analysis begins with an introduction to the vulnerabilities of classical cryptography in the context of quantum computing advancements. It delves into Quantum Key Distribution (QKD) protocols such as BB84 and E91, Quantum Random Number Generators (QRNGs), and post-quantum cryptography algorithms in detail. Real-world case studies are presented to illustrate the practical applications and advancements in quantum cryptographic techniques. Additionally, the paper addresses the challenges associated with implementing quantum cryptography and proposes strategies for its integration with existing cybersecurity frameworks. The discussion on future trends highlights anticipated technological advancements, potential applications in quantum internet and blockchain security, suggested research directions, and policy implications. The significance of quantum cryptography in securing sensitive data and establishing trust in critical sectors is thoroughly emphasized.
The advent of quantum computing represents a transformative leap in computational power, offering the potential to solve complex problems beyond the reach of classical computers. However, this power also presents significant cybersecurity risks, as quantum algorithms can potentially break widely used encryption methods, jeopardizing data privacy and secure communications. This paper presents a comprehensive review of emerging quantum-related cybersecurity threats and explores defense mechanisms designed to mitigate these risks. We examine both theoretical and real-world implications of quantum computing on cryptographic systems, highlighting recent developments in post-quantum cryptography, Quantum Key Distribution (QKD), and hybrid classical-quantum security solutions. This review aims to provide a foundational understanding of the threats quantum computing poses to cybersecurity and discusses current and future defenses essential for safeguarding digital infrastructure.
The rapidly advancing computational capacity of modern computers is making traditional encryption techniques more and more susceptible in the ever-changing field of cybersecurity. Using the ideas of quantum mechanics, quantum cryptography presents a viable way to improve security by introducing protocols that are impervious to hacking attempts based on classical computation. This paper offers an extensive overview of newly developed quantum cryptography methods intended to protect digital communication against present and potential dangers, such as those originating from quantum computers. The potential of key protocols like post-quantum cryptography and quantum key distribution (QKD) to supplement or replace current encryption techniques is investigated. The report outlines the benefits of quantum cryptography, such as its capacity to safeguard wide-scale networks, its ability to detect eavesdropping in real-time, and its unbreakable encryption. It also covers the real-world difficulties in putting these protocols into practice, like budgetary constraints, infrastructure needs, and technology constraints. This survey highlights the critical necessity to implement quantum cryptography solutions as a foundation for future-proof cybersecurity frameworks as the world draws closer to the era of quantum computing
The rapid advancement of quantum computing presents both unprecedented opportunities and significant threats to modern cybersecurity. As quantum processors progress toward practical large-scale deployment, widely used cryptographic systems, particularly RSA, ECC, and other public-key mechanisms, face the risk of becoming obsolete. This review examines how quantum technologies can be strategically leveraged to enhance cybersecurity while simultaneously addressing the vulnerabilities introduced by quantum-enabled attacks. A systematic analysis of 35-40 peer-reviewed studies was conducted to evaluate developments in post-quantum cryptography, quantum-resistant security protocols, Quantum Key Distribution (QKD), and hybrid classical–quantum defense architectures. The findings reveal a rapidly evolving research landscape focused on resilient lattice-based cryptography, scalable quantum-safe communication frameworks, and early-stage quantum machine learning applications for intrusion detection. The review highlights both the promise and current limitations of quantum-driven security solutions, including hardware constraints, integration challenges, and the need for global standardization. The study underscores the urgency for governments, industries, and researchers to adopt quantum-ready cybersecurity strategies and accelerate the transition to quantum-resilient infrastructures.
Classical cryptography systems are vulnerable to quantum computing because they depend on computationally tough issues, such as solving discrete logarithms or factoring big integers. Cryptography in the age of quantum computing has new challenges and opportunities. Post-quantum cryptography (PQC) aims to address these issues by developing algorithms that are resistant to quantum computing, including code-based, hash-based, and lattice-based cryptography. The study sheds light on how PQC can tackle future cybersecurity risks by examining their security models, performance, and suitability for real-world implementation. The article also delves into the difficulties of updating the world's cryptographic infrastructure to use algorithms that are immune to quantum attacks, as well as the present status of PQC standardization initiatives. Protecting digital systems from possible breaches and guaranteeing long-term data security will be the deployment of PQC that is most important as quantum computing develops.
Most currently used cryptographic tools for protecting data are based on certain computational assumptions, which makes them vulnerable with respect to technological and algorithmic developments, such as quantum computing. One existing option to counter this potential threat is quantum key distribution, whose security is based on the laws of quantum physics. Quantum key distribution is secure against unforeseen technological developments. A second approach is post-quantum cryptography, which is a set of cryptographic primitives that are believed to be secure even against attacks with both classical and quantum computing technologies. From this perspective, this study reviews recent progress in the deployment of the quantum-secured infrastructure based on quantum key distribution, post-quantum cryptography, and their combinations. Various directions in the further development of the full-stack quantum-secured infrastructure are also indicated. Distributed applications, such as blockchains and distributed ledgers, are also discussed.