Quantum computers pose a significant security threat to cryptocurrencies such as Bitcoin. Now a team of Russian scientists has worked out how to secure blockchains using quantum mechanics.
A. Perry, R. Sun, C. Hughes, J. Isaacson, and J. Turner. (2019)cite arxiv:1905.00282Comment: 123 pages. High School Course Material for Teachers. Version 2 has improvements after trial runs, e.g., typos removed, text explained, answers expanded, etc.