This podcast discuss a Nature's article that investigates the threat that quantum computing poses to blockchain networks. It explores how quantum computers could be used to break existing cryptographic algorithms used in blockchain, specifically highlighting the vulnerabilities of digital signatures and communication protocols. The authors propose an end-to-end framework for post-quantum blockchain networks, which involves incorporating quantum entropy for key generation, generating post-quantum certificates, and establishing quantum-resistant TLS tunnels between nodes. The framework also introduces a post-quantum signature verification protocol, which they implement in an Ethereum-based network called LAC Chain. The article concludes with a discussion of the performance and scalability of their proposed solutions, demonstrating their practicality for securing blockchain networks from quantum adversaries.

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Reference

Allende, M., León, D.L., Cerón, S. et al. Quantum-resistance in blockchain networks. Sci Rep 13, 5664 (2023). https://doi.org/10.1038/s41598-023-32701-6