In an era where the escalating power of computers threatens the integrity of modern cryptographic systems, the need for stronger, more resilient security measures has never been more urgent. Quantum cryptography, with its solid theoretical foundation and increasingly mature practical implementations, offers a promising solution. From secure key distribution and direct communications to large prime factorization, quantum cryptography is becoming the backbone of numerous critical applications, including e-commerce, e-governance, and the emerging quantum internet. As a result, this field is capturing the attention of computer scientists and security professionals worldwide. Harnessing Quantum Cryptography for Next-Generation Security Solutions serves as an indispensable scholarly resource for those navigating the evolving landscape of cryptography and cybersecurity. It compiles the latest research and advancements in quantum applications, covering a broad spectrum of topics such as e-commerce, machine learning, and privacy. Security analysts, software security engineers, data scientists, academics, or policymakers will find that this comprehensive guide offers the insights and knowledge necessary to stay ahead in the world of cyber security.