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Lecture notes in computer science

Quantum-Safe Blockchain Authentication: A Decentralized Approach for Secure Mobility and Roaming Networks

M Indushree, R. Shashidhara, Heung-No Lee

Published Jan 1, 2026• 0 citations
Publisher
DOI
10.1007/978-3-032-19981-2_27

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In the ubiquitous networks, mobile nodes can obtain roaming service that enables them to get access to the services extended by their home networks in the field of foreign network. To provide secure and anonymous communication for legal mobile users in roaming services, there should be a mutual authentication between mobile user and foreign agent with the help of home agent. There are many roaming authentication schemes which have been proposed; however, with the progress of quantum computation, quantum attack poses security threats to many traditional public key cryptography-based authentication schemes; thus, antiquantum attack roaming authentication schemes need to be investigated. On account of the limitation of computational resources for mobile nodes, a lightweight anonymous and antiquantum authentication schemes need to be developed to enable mobile nodes to roam across multiple service domains securely and seamlessly. In consideration of the advantages of lattice in antiquantum, an NTRU-based authentication scheme with provable security and conditional privacy preservation is proposed to remedy these security weaknesses. Compared with the existing scheme, the proposed scheme not only improves efficiency but also can resist the quantum attack.
The rise of quantum computing introduces a profound threat to existing digital security frameworks, particularly those that underpin modern payment systems. Current cryptographic standards, such as RSA, ECC, and ECDSA are susceptible to being broken by quantum algorithms like Shor's and Grover's, jeopardizing the confidentiality, authenticity, and integrity of transactions across financial networks. This study presents a comprehensive investigation into the design, feasibility, and architecture of a universal quantum-safe payment platform capable of processing all types of digital transactions, ranging from mobile money and bank transfers to blockchain-based and card payments through existing delivery channels on a decentralized infrastructure. The research synthesizes current developments in post-quantum cryptography (PQC), including lattice-based, hash-based, and code-based algorithms, and evaluates their suitability for real-time financial systems. The proposed platform incorporates a permissioned distributed ledger, API-level compatibility with legacy financial protocols, and an identity-governed, modular architecture that enables cryptographic agility and policy compliance. Through architectural modeling and critical analysis, this research provides a forward-looking blueprint for building quantum-resilient financial infrastructure. It concludes that while performance and governance hurdles remain, quantum-safe payment networks are both technically feasible and urgently necessary. This work aims to equip stakeholders, especially fintech firms, banks, and regulatory bodies, with a detailed roadmap for transitioning to secure, interoperable, and scalable payment systems in the quantum era.
The integration of blockchain technology with almost all sectors can bring positive transformation and a future influence on digital transactions. So far as the development of quantum computers has been achieved, it's necessary for blockchain security to explore quantum-resistant cryptographic techniques. This study inspects the production of a blockchain system with an adjustable transaction payment model, and introduces quantum resistant cryptography. Basically, the system attempts to compensate for the inherent security flaws in each of the conventional blockchains by authenticating and verifying transactions using Hash-based Message Authentication Code (HMAC)-based signatures, using conventional quantum-safe digital wallets. The project also looks at a dynamic fee setting to optimize transaction processing during periods of network congestion and a Proof-of-Work (PoW) consensus mechanism to lock the blockchain further. Finally, This paper would simulate the E91 quantum key distribution (QKD) protocol so as to examine the security features that are provided by the entanglement effects. Unlike the more commonly employed BB84 scoring system, the E91 scheme involves the discovery of eavesdropping through the breach of Bell inequality, and thus provides a unique approach to modular authentication of key swap in decentralized environment.