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

The Bitcoin community is considering a new approach to addressing the potential threat of quantum computing to the network's security. Instead of imposing a pre-emptive freeze on vulnerable coins, the proposal involves waiting for an attacker to demonstrate their capabilities and then responding accordingly. This 'wait and react' strategy relies on a 'canary' system, which would trigger a network-wide restriction on older bitcoin wallets only if a quantum-capable attacker is detected. The system works by placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker, with any spend from that address serving as public proof that the threat has arrived. This approach is designed to provide a more flexible and responsive solution to the potential risks posed by quantum computing, while also minimizing disruption to users. However, it rests on the assumption that the first entity capable of breaking Bitcoin's security would claim a bounty rather than attempting a large-scale theft. The proposal also includes a 'safety window' to make stealth attacks more difficult and a financial incentive to encourage users to contribute to the bounty. While this approach has the potential to provide a more effective and efficient solution to the quantum computing threat, it also carries significant risks and uncertainties.