Bitcoin Developers Propose 'Wait and React' Strategy to Counter Quantum Computing Threats

The Bitcoin community is considering a novel approach to addressing the potential threat of quantum computing to the network's security. Instead of imposing a pre-emptive freeze on vulnerable coins, developers are discussing a 'wait and react' strategy that would only trigger a network-wide restriction if a quantum-capable attacker demonstrates their capabilities on-chain. This approach is based on a 'canary' system, which involves placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker. If the address is accessed, it would serve as public proof that the threat is real and automatically trigger a network-wide freeze of older wallets. The proposal also includes a financial incentive, allowing users to contribute to a bounty that would reward the first entity to demonstrate a quantum attack publicly. However, this approach relies on the assumption that the first entity capable of breaking Bitcoin's security would claim the bounty rather than executing a large-scale theft. This assumption has raised concerns, as it goes against the network's historical emphasis on preventing worst-case scenarios. The proposal is designed as an alternative to a controversial plan that would impose a fixed five-year timeline for implementing security measures, which has been criticized for being 'authoritarian and confiscatory.' The 'wait and react' strategy aims to reduce the risk of disrupting users prematurely, but it remains to be seen whether it will be effective in preventing a potential catastrophe.