Mixed quantum states exhibit a rich geometric structure from the information geometry of density operators and their purifications. Parallel transport via the Uhlmann connection induces holonomy transformations along closed trajectories of density operators. Although extensively studied in quantum physics, their potential as information-theoretic resources in quantum cryptography remains largely unexplored. This work investigates whether holonomy in the purification bundle can serve as a secrecy resource for mixed-state quantum systems. The key observation is that while a density-operator trajectory describes only the base manifold, the lifted trajectory depends on an additional unitary gaug... More >

This research presents Quantum-Entangled Lattice-Augmented Cryptographic System (QELACS) a next-generation hybrid cryptographic framework that fuses quantum entanglement with algebraic lattice-based encryption to deliver quantum-safe, scalable, and high-performance data security. Unlike traditional hybrid models that merely layer quantum and classical methods, QELACS deeply integrates quantum mechanics into the cryptographic core, enabling entanglement-assisted operations across the encryption lifecycle. The framework introduces three foundational algorithms: Entanglement-Augmented Secret Key Generation (EASKG) for ultra-secure and rapid key production, Quantum-Lattice Encryption and Decrypt... More >

Quantum–based models are used to improve the Internet of Things (IoT) ecosystems' efficiency, storage capacity, processing speed, and security. These models investigate quantum effects such as subluminality/superluminality, time delay, and phase shifting to achieve the mentioned goals. Mostly, these models use achiral atomic media that deal with the light beam in a straight path and fail to provide the most needed properties of efficient decision-making, optical routing, control of polarization, and enhanced security. In order to make up for these deficiencies, an investigation into the propagation of a light beam through a chiral atomic medium has been carried out. A decision-making and o... More >

It is both my privilege and honor to introduce our new journal, the Journal of Quantum Cryptography, a peer-reviewed publication dedicated to advancing secure communication in the quantum age. This journal serves as a vital platform for researchers, practitioners, and policymakers working at the intersection of quantum mechanics and cryptographic science. Our mission is to foster innovation, promote interdisciplinary collaboration, and accelerate the development of quantum-secure cryptographic solutions that are resilient against future threats posed by quantum computing. More >