The sixth-generation wireless communication$(6 \mathrm{G})$promises advancements in speed, latency, and connectivity to facilitate revolutionary technology like holographic communication, extensive AI, and Internet of Everything (IoE). Such breakthroughs come with sophisticated cyber security issues like ultra-dynamic attack surfaces, decentralized device systems, and quantum-vulnerable encryption protocols. To counter these challenges, this paper investigates the application of blockchain technology and quantum computing as solutions for 6G cyber security improvement. Blockchain provides a tamper-proofed, decentralized system that guarantees data integrity, secure authentication, and transparent access control among heterogeneous devices. However, quantum computing also provides solutions such as post-quantum cryptography (PQC) and quantum key distribution (QKD) that can enhance communication resilience against quantum and conventional assaults.
The sixth-generation wireless communication(6G)promises advancements in speed, latency, and connectivity to facilitate revolutionary technology like holographic communication, extensive AI, and Internet of Everything (IoE). Such breakthroughs come with sophisticated cyber security issues like ultra-dynamic attack surfaces, decentralized device systems, and quantum-vulnerable encryption protocols. To counter these challenges, this paper investigates the application of blockchain technology and quantum computing as solutions for 6G cyber security improvement. Blockchain provides a tamper-proofed, decentralized system that guarantees data integrity, secure authentication, and transparent access control among heterogeneous devices. However, quantum computing also provides solutions such as post-quantum cryptography (PQC) and quantum key distribution (QKD) that can enhance communication resilience against quantum and conventional assaults.
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.
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.
As we move toward the rollout of 6G networks, we're stepping into an era of groundbreaking technological advancements. These next-generation networks promise ultra-low latency and seamless integration with artificial intelligence (AI) and the Internet of Things (IoT), unlocking a new level of connectivity and performance. However, with these powerful capabilities come significant security challenges. Traditional encryption methods may not be enough to protect the complex and highly sensitive data traveling through 6G networks. One of the most promising solutions lies in Quantum Communication, particularly Quantum Key Distribution (QKD)-a method that leverages the laws of quantum mechanics to enable highly secure encryption. This paper explores the emerging security risks in both terrestrial and satellite communication channels and reviews current research on integrating quantum communication into 6G infrastructure. Special attention is given to its potential within the metaverse, a rapidly evolving digital environment that demands robust and future-proof security frameworks. Key areas of focus include-Addressing security vulnerabilities in quantum communication, Enhancing infrastructure to support quantum technologies, Reducing error rates in quantum protocols. the paper aims to propose a flexible, forward-looking framework designed to ensure fast, secure communication for critical sectors such as finance, defense, and healthcare.
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.
As 6G networks are about to serve billions of devices, secure and reliable authentication is a key challenge. Conventional authentication solutions are under attack from both centralized and future quantum computing threats. This paper introduces a new authentication protocol that incorporates randomness generated by quantum mechanics and blockchain technology to achieve a lightweight, decentralized, and post-quantum secure solution for 6G scenarios. Each device creates a truly random key from a Quantum Random Number Generator (QRNG), and this key is then securely stored on a blockchain in hashed form. When the device tries to join the network, its key is checked against the blockchain ledger to provide for one-time, tamper- evident authentication without the need for centralized servers. The protocol is designed to support smart contracts for expiry and revocation of keys, rendering it appropriate for dense and highly dynamic 6G networks. Our system provides increased security, immunity against future quantum attacks, and efficient scaling for IoT, healthcare, and autonomous communication systems.
The integration of blockchain with 6G networks offers secure, decentralized solutions for emerging consumer applications by addressing key challenges such as device reliability, interoperability, and security. Classical blockchains rely on cryptographic primitives for data integrity and trust, but these are vulnerable to quantum attacks and face scalability challenges in ultra-dense environments. To address these issues, we propose a quantum blockchain framework based on temporally entangled GHZ states, enabling inherent quantum encoding of block linkage and integrity. A four-qubit blockchain data structure is designed and implemented using IBM Q quantum processors, with a quantum hash circuit developed to link consecutive blocks securely. The system’s resilience is validated against two representative quantum attacks, CNOT and Ping Pong, demonstrating its ability to maintain tamper resistance in noisy environments. The experimental results achieved a fidelity of 65.79% and offered greater structural security than classical hash-based chains under similar conditions. This enables secure, scalable, and quantum-resilient blockchain integration for 6G consumer applications such as telemedicine, IoT device authentication, decentralized finance, and immersive edge services.