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.
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.
The rapid growth of consumer electronic devices connected through emerging 6G networks introduces critical challenges in ensuring data security, privacy, and trust across decentralized internet of consumer electronics IoCE infrastructures. Traditional encryption and access control models are insufficient for highly dynamic, software-defined, and zero-touch network (ZTN) environments typical of consumer electronics. In this work, we propose a blockchain-assisted quantum encryption protocol tailored for IoCE-cloud architectures within secure and standardized 6G systems. The scheme integrates quantum key generation via unitary transformations, lightweight symmetric encryption using the ASCON cipher, and tamper-proof authentication through blockchain. It enables autonomous, self-configuring, and self-protecting communication pathways between consumer devices and cloud infrastructure. Formal and informal security analyses demonstrate resilience against classical and quantum attacks, including replay, eavesdropping, and Sybil attacks. The protocol is validated using Qiskit simulations on IBM quantum hardware, achieving 91% fidelity. Performance evaluation confirms its efficiency and scalability, highlighting its potential as a secure-by-design framework for next-generation IoCE systems aligned with the Zero-Touch vision.
Blockchain technology, renowned for its ability to securely store data, hashes, and signatures permanently, faces unprecedented challenges in secure Consumer IoT (CIoT) networks with the advent of quantum computing. This paper proposes a set of robust quantum-based protocols and techniques to address these challenges by enhancing the security, scalability, and reliability of CIoT systems in the face of quantum threats. Updating the blockchain infrastructure is imperative to ensure ongoing security, which involves forks or protocol adjustments to establish new post-quantum chains and addresses, requiring rapid data and asset migration by users. Blockchain guarantees data integrity through an immutable ledger of transactions distributed via cryptographic hashes. The proposed quantum protocols and techniques enhance scalability and reliability and address the unique security needs of both commercial and governmental applications in secure CIoT networks through immersive embedded cyber-physical systems. These include Quantum Currency Security Protocols, Distributed Ledger Data Blocks, Quantum Ledger Verification, Quantum Solutions for Middleman Attacks, and the integration of Elliptic Curve Cryptography (ECC)-based security measures. By integrating these methods, the proposed approach ensures robust protection against emerging quantum threats, thereby securing sensitive information and transactions.
The convergence of 6G communication technologies and the Internet of Medical Things (IoMT) has revolutionized modern healthcare by enabling real-time monitoring, intelligent diagnosis, and remote patient management. However, the proliferation of interconnected medical devices also exposes the ecosystem to severe security challenges, including identity forgery, data tampering, and emerging quantum-based attacks. To address these challenges, this paper proposes a blockchain-assisted quantum signature framework for securing data exchange in 6G - enabled IoMT environments. The proposed framework leverages quantum digital signatures (QDS) based on entangled photon states to ensure message authenticity and non-repudiation, while blockchain technology provides decentralized trust management and immutable transaction logging. A Medical Authorization Center (MAC) coordinates identity registration, signature verification, and consensus-based access control among IoMT entities. Furthermore, smart contracts are utilized to automate trust evaluation and audit trails, thereby mitigating insider and replay attacks. Performance analysis using Qiskit simulations and IBM’s quantum backends demonstrates an average signature fidelity of 91% and a communication efficiency of 75.61%, validating the framework’s robustness for resource-constrained medical devices. By fusing quantum communication primitives with blockchain-enabled transparency, this work presents a scalable and tamper-resistant security solution for next-generation healthcare networks. The convergence of 6G communication technologies and the Internet of Medical Things (IoMT) has revolutionized modern healthcare by enabling real-time monitoring, intelligent diagnosis, and remote patient management. However, the proliferation of interconnected medical devices also exposes the ecosystem to severe security challenges, including identity forgery, data tampering, and emerging quantum-based attacks. To address these challenges, this paper proposes a blockchain-assisted quantum signature framework for securing data exchange in 6G-enabled IoMT environments. The proposed framework leverages quantum digital signatures (QDS) based on entangled photon states to ensure message authenticity and non-repudiation, while blockchain technology provides decentralized trust management and immutable transaction logging. A Medical Authorization Center (MAC) coordinates identity registration, signature verification, and consensus-based access control among IoMT entities. Furthermore, smart contracts are utilized to automate trust evaluation and audit trails, thereby mitigating insider and replay attacks. Performance analysis using Qiskit simulations and IBM’s quantum backends demonstrates an average signature fidelity of 91% and a communication efficiency of 75.61%, validating the framework’s robustness for resource-constrained medical devices. By fusing quantum communication primitives with blockchain-enabled transparency, this work presents a scalable and tamper-resistant security solution for next-generation healthcare networks.
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 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.
The rapid convergence of sixth-generation (6G) networks and the Internet of Things (IoT) offers enormous potential for ultra-reliable, low-latency, and massive device connectivity. However, this integration also raises security and privacy concerns, particularly in light of new threats from quantum computing that could undermine traditional cryptography. The architecture of quantum-safe IoT networks that can withstand post-quantum security threats is thoroughly discussed in this review. It addresses the challenges related to how to use blockchain technology to provide decentralized trust as well as secure transactions, how to use post-quantum cryptographic algorithms to protect data confidentiality, and the best way to use a trust management architecture to improve identity verification, authorization, and authentication in the diverse IoT environment. The paper then examines scalability considerations, resource constraints, and interoperability problems that impact safe IoT deployments in the 6G era. This work serves as a roadmap for researchers and practitioners who aim to create robust and future IoT infrastructure and then maintain their security in a post-quantum world by integrating recent research patterns, solution development, and considerations related to real-world implementation.