This book delves into the transformative realm of quantum cryptography, exploring its evolution, theoretical foundations, and practical applications. Readers will journey through the fundamental principles of quantum mechanics and their implications for secure communication. The text meticulously covers classical cryptographic techniques and identifies their limitations, making a compelling case for the necessity of quantum-based solutions. Comprehensive explanations of key quantum key distribution (QKD) protocols, including the renowned BB84, are provided alongside in-depth analyses of security models, threat assessments, and the intricacies of side-channel attacks. The book also addresses the challenges and opportunities presented by the integration of quantum solutions into existing infrastructures and the ethical considerations surrounding data protection. With a focus on the latest advancements and future predictions, this work serves as an essential resource for cybersecurity professionals, researchers, and anyone interested in the intersection of quantum physics and cryptography.
