A Coinbase research lead has warned that advances in quantum computing could pose wider risks to Bitcoin than simple wallet theft.
Quantum Risk Moves Beyond Keys
One threat is to signatures. Quantum algorithms such as Shor’s could, at scale, recover private keys from public keys, letting attackers sign transactions and drain funds.
The second is a possible mining problem: a sufficiently fast quantum miner might find proofs of work much faster than classic rigs, upsetting incentives and block production. Duong and others stress the signature risk is nearer-term in theory, because it only requires cracking signatures tied to revealed public keys.
What The Industry Is DoingEngineers in the crypto space are looking at migration paths that would swap in quantum-resistant schemes, though any such change to Bitcoin would be complex and would require wide agreement.
A Long-Term Problem, Not An Immediate OneAccording to industry sources, coins that remain in addresses that have already allowed vulnerability of public keys are the most exposed if a well-architectured quantum machine is deployed. That makes best practices — like avoiding address reuse and moving old balances to fresh, quantum-resistant addresses once those are available — sensible steps. But there is no simple, one-click fix for the whole ecosystem, experts say.
Featured image from Peter Hansen/Getty Images, chart from TradingView
