Quantum-Secure Blockchain and Decentralized Systems

Abstract

The imminent advent of quantum computing poses a significant threat to the cryptographic foundations of conventional blockchain systems. This research explores the integration of quantum-resistant cryptographic algorithms within decentralized architectures to future-proof blockchain networks. We investigate lattice-based, multivariate, and hash-based signature schemes as viable candidates for post-quantum security and evaluate their performance and scalability within distributed ledger environments. Furthermore, the study proposes a hybrid consensus model combining quantum-secure primitives with classical proof-of-stake mechanisms to enhance resilience and maintain efficiency. Through simulation and empirical validation, the proposed framework demonstrates robustness against quantum-enabled attacks while preserving decentralization, transparency, and immutability. Our findings contribute to the evolution of blockchain technologies towards a secure post-quantum era, establishing a foundation for sustainable and secure decentralized applications across industries.