The Practical Value of Information-Theoretic Security Technologies

I. S. Kabanov, R. R. Yunusov, Yury Kurochkin +1 more

Quantum key distribution technologies promise information-theoretic security and are currently being deployed in com-mercial applications. We review new frontiers in information security technologies in communications and distributed storage applications with the use of classical, quantum, hybrid classical-quantum, and post-quantum cryptography. We analyze the cur-rent state-of-the-art, critical characteristics, development trends, and limitations of these techniques for application in enterprise information protection systems. An approach concerning the selection of practical encryption technologies for enterprises with branched communication networks is discussed.

Sarah Chehade, Joel Dawson, Stacy Prowell +1 more

Hybrid quantum-classical systems are emerging as key platforms in quantum computing, sensing, and communication technologies, but the quantum-classical interface (QCI)-the boundary enabling these systems-introduces unique and largely unexplored security vulnerabilities. This position paper proposes using entropy-based metrics to monitor and enhance security, specifically at the QCI. We present a theoretical security outline that leverages well-established information-theoretic entropy measures, such as Shannon entropy, von Neumann entropy, and quantum relative entropy, to detect anomalous behaviors and potential breaches at the QCI. By linking entropy fluctuations to scenarios of practical relevance-including quantum key distribution, quantum sensing, and hybrid control systems-we promote the potential value and applicability of entropy-based security monitoring. While explicitly acknowledging practical limitations and theoretical assumptions, we argue that entropy-based metrics provide a complementary approach to existing security methods, inviting further empirical studies and theoretical refinements that can strengthen future quantum technologies.

Hutchison, David, Gerhard Weikum, Moshe Y. Vardi +13 more

DaWei Li, Guan‐Jie Fan‐Yuan, Leyi Zhang

ABSTRACT Quantum key distribution (QKD) is a key‐sharing technology with information‐theoretic security. Its security does not depend on computational complexity, and is considered one of the methods for achieving post‐quantum secure communication. This opinion reviews the main applications of QKD technology in China and introduces progress in standardisation. These developments can provide reference experiences for the global practical application of QKD.

Kaoru Kurosawa