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 implementing a pre-scheduled freeze on vulnerable coins, the proposed 'wait and react' strategy would only trigger a network-wide restriction if a quantum-capable attacker were to demonstrate their capabilities. This approach is based on a 'canary' system, where a small amount of bitcoin is placed in a special address that can only be unlocked by a quantum-capable attacker, serving as public proof that the threat has arrived and automatically triggering a network-wide freeze. The proposal also includes a financial incentive, where users can contribute to a bounty that rewards 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 design principle of preventing worst-case scenarios. The proposal is seen as an alternative to BIP-361, which would impose a fixed five-year timeline for upgrading the network's security, potentially leading to the confiscation of unmigrated coins. Critics have argued that this outcome would be 'authoritarian and confiscatory,' undermining Bitcoin's core principle of private key ownership. The 'wait and react' strategy aims to reduce the risk of disrupting users prematurely, but it remains to be seen whether this approach will be effective in preventing a potential quantum computing threat.