Blockchain latest news: a state-owned quantum computer could break blockchains in as little as three years  https://www.computing.co.uk/ctg/news/3033006/state-owned-quantum-computer-break-blockchains-three-years 'A commercially viable quantum computer is still probably a decade away but the first rudimentary, state-owned device capable of breaking common one-way encryption algorithms like AES and elliptic curve cryptography could be with us much sooner.'
'Whoever achieves it first - and it could be within as little as three years according to Cheng - don't expect to learn about it in the news.'