Title: A blockchain architecture with quantum key distribution (QKD)

Authors: Ricardo Fernandes da Silva

Addresses: Department Academic Physics, University Technological Federal Paraná, Curitiba, Paraná, 80230-901, Brazil

Abstract: This paper presents an innovative architecture for blockchain systems that integrates quantum key distribution (QKD) cryptography as a fundamental component to enhance the security and integrity of transactions in the face of the growing threat posed by quantum computers. The proposed architecture leverages the unconditional security of QKD, based on the laws of quantum physics, to protect the blockchain against potential attacks that could compromise classical cryptographic algorithms. We explore the architecture design, consensus protocols, transaction authentication mechanisms, and the practical implications of integrating QKD into blockchain systems. The analysis focuses on the quantum key distribution systems from ID Quantique (IDQ), recognised for their robustness and reliability, to highlight the feasibility and benefits of implementing QKD in real-world scenarios. Additionally, we explore the challenges and opportunities inherent in implementing this architecture, including QKD scalability, key management, interoperability, and integration with existing communication infrastructures.

Keywords: QKD; quantum key distribution; blockchain security; quantum cryptography; consensus Protocols; transaction authentication.

DOI: 10.1504/IJBC.2024.143407

International Journal of Blockchains and Cryptocurrencies, 2024 Vol.5 No.3, pp.161 - 170

Received: 29 May 2024
Accepted: 03 Sep 2024
Published online: 18 Dec 2024 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article