This new book discusses the concepts while also highlighting the challenges in thefield of quantum cryptography and also covering cryptographic techniques and cybersecurity techniques, in a single volume. It comprehensively covers important topics in the field of quantum cryptographywith applications, including quantum key distribution, position-based quantumcryptography, quantum teleportation, quantum e-commerce, quantum cloning, cybersecurity techniques’ architectures and design, cyber security techniques management,software-defined networks, and cyber security techniques for 5G communication. The text also discusses the security of practical quantum key distribution systems,applications and algorithms developed for quantum cryptography, as well as cybersecurity through quantum computing and quantum cryptography. The text will be beneficial for graduate students, academic researchers, andprofessionals working in the fields of electrical engineering, electronics andcommunications engineering, computer science, and information technology.