Modern connectivity has changed significantly as a result of wireless mobile networks’ utilization of continuous communication across an international infrastructure. Data protection and cyber attacks are two issues that continue to arise as mobile computing and wireless communication networks develop. As 5G networks give way to 6G networks, terahertz communication, artificial intelligence integration, and quantum technologies are introduced to provide high-speed data transfer and communications, along with improved security. In contrast, post-quantum cryptography (PQC) and quantum key distribution (QKD) are two remote methods for addressing the need to adjust cryptographic systems in the current infrastructures to fight impending quantum threats. The fundamental ideas, real-world uses, and ways that PQC and QKD operate together to provide strong security for next-generation networks are all examined in this chapter.
Modern connectivity has changed significantly as a result of wireless mobile networks’ utilization of continuous communication across an international infrastructure. Data protection and cyber attacks are two issues that continue to arise as mobile computing and wireless communication networks develop. As 5G networks give way to 6G networks, terahertz communication, artificial intelligence integration, and quantum technologies are introduced to provide high-speed data transfer and communications, along with improved security. In contrast, post-quantum cryptography (PQC) and quantum key distribution (QKD) are two remote methods for addressing the need to adjust cryptographic systems in the current infrastructures to fight impending quantum threats. The fundamental ideas, real-world uses, and ways that PQC and QKD operate together to provide strong security for next-generation networks are all examined in this chapter.
The advent of 6G networks is expected to accelerate developments in fields like artificial intelligence, smart cities, autonomous technologies, and the Internet of Things (IoT) by providing remarkable connectivity, extremely fast speeds, and sophisticated data-driven services. The security flaws in these networks, however, also change with time, especially in light of the emerging threat of quantum computing, which has the potential to make the cryptographic techniques used today outdated. The importance of quantum cryptography (QC) in defending 6G systems against these kinds of quantum-era threats is highlighted in this section. The significance of post-quantum cryptography and Quantum Key Distribution (QKD) in providing extremely secure, nearly impenetrable encryption to protect the privacy and integrity of 6G communications is emphasized. The basic technology behind QC, how it integrates with 6G infrastructure, and the real-world difficulties of large-scale quantum-secure system deployment are also covered in the conversation. It also explores the impact of quantum-resistant algorithms, the hardware required to enable them, and the governmental actions necessary for widespread use. This part provides a thorough summary of the challenges and possibilities associated with safeguarding 6G networks for a future driven by quantum technology.
Quantum computing is a rapidly developing field with the potential to revolutionize many industries. However, it also poses a serious threat to the security of future networks as current communications rely on encryption to protect data from unauthorized access, which could be broken by quantum computers in the future. This means that they could be used to attack future networks like Beyond 5G (B5G) and Sixth Generation (6G) which are expected to be much more widely used than previous generations of networks. There are a number of things that can be done to mitigate the quantum threat to future networks. One approach is to develop new encryption algorithms, Post-Quantum Cryptography (PQC), that are resistant to quantum computers. Another approach is to use Quantum Key Distribution (QKD) to create secure keys that cannot be broken by quantum computers. This work examines the current state of quantum and post-quantum cryptography and their applications in upcoming generations of wireless networks such as 6G, and the challenges that might arise for their implementation. Additionally, a new isogeny-based post-quantum cryptographic scheme is presented. This paper aims to advance and contribute to the research and development of quantum security in future networks.
As sixth-generation (6G) wireless networks come into existence, there is more ever-growing demand for high-speed and secure communication than ever before. Conventional cryptographic methods are facing growing constraints to keep pace with the challenging reality of cyberattacks. Quantum-based communication technologies like quantum key distribution (QKD), quantum encryption, and quantum-resistant protocols provide an inherently secure means of transmitting data. This study examines how quantum communication technologies can be embedded within 6G architectures to provide enhanced data protection. With the help of AI and machine learning, 6G networks are able to anticipate threats and counter them, and quantum technologies offer unbreakable physical-layer encryption. Proposed work examines the security, architectural requirements, and implementation practicalities of this integration. In addition, we discussed the potential effect of quantum computing on present cryptographic techniques and describe future research directions for deployment at scale of quantum-secure communication in next-generation wireless systems.
The potential of the swift development of quantum computing is an extreme danger to the traditional cryptographic programs, and they are the foundation of the modern communication infrastructure. RSA and ECC are classical public-key algorithms that can be successfully quantum-attacked, in particular, Shor's algorithm can easily factor large integers and calculate discrete logarithms (Bernstein et al., 2017). The Post-Quantum Cryptography (PQC) has become the key to secure the next-generation communication networks against these threats, which relies on lattice problem-based algorithms, hash-based based algorithms, multivariate polynomials-based algorithms, and code-based cryptography. The paper examines the concepts, design, and implementation issues of PQC within current network infrastructure focusing on the secure transmission of data, authentication, and key management in the upcoming 5G and 6G networks. The approach will include the survey of existing algorithms of PQC, model the integration of protocol in the communication systems and test computational efficiency, security strength, and scalability. It has been found that PQC is suitable to protect network communications against quantum attackers, and achieves reasonable performance, though trade-offs can be seen in terms of computation overhead, key size, and latency. The research offers understanding to the researcher, network engineers and policy makers in order to adopt quantum resistant cryptography protocols to secure the confidentiality, integrity and authenticity of information in the future communication networks.
The sixth generation (6G) of wireless networks is expected to surpass the limitations of 5G by enabling terabit-level data rates, sub-millisecond latency, and ultra-dense connectivity through the integration of space-air-land-sea infrastructures and AI-driven autonomous management. However, such advancements pose new challenges in computational scalability and security against quantum-enabled threats. Quantum Artificial Intelligence (QAI), combining quantum computing principles with AI, offers exponential computational efficiency, enhanced model capacity, and resilient cryptographic solutions. This paper reviews QAI-based protocols for 6G across three domains: security, focusing on Quantum Key Distribution (QKD) and post-quantum cryptography; computing, including quantumenhanced edge intelligence and hybrid optimization; and data processing, with emphasis on terahertz (THz) channel modeling, holographic content, and real-time decision systems. The convergence of 6G and QAI is shown to mark a paradigm shift toward secure, scalable, and intelligent communication infrastructures of the future.
Sixth-generation (6G) networks offer unprecedented ultra-reliability, capacity, and low-latency communication. Nevertheless, the same developments also pose security threats to complex communication infrastructures that may be resistant to traditional cryptographic tools, especially in the context of quantum computing. Quantum Key Distribution (QKD) is an innovative technique for achieving unconditional security that leverages quantum-mechanical principles to share cryptographic keys securely. This paper discusses how QKD can be integrated into 6G and beyond networks and used to ensure the confidentiality and integrity of data across applications such as autonomous systems, the Internet of Things (IoT), and smart city infrastructure. This paper explores the architecture of QKD-based 6G communication, key-generation systems, and quantum-resistant network layers. It also examines scalability, synchronization, and hardware implementation, and suggests possible hybrid approaches for integrating classical and quantum security protocols. The results imply that the idea of QKD may become the foundation of safeguarded communication systems in the future, ensuring resilience against attacks in the quantum era and enabling individuals to trust the next generation of wireless.