Bitcoin Developers Propose 'Wait and React' Strategy to Counter Quantum Threat

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, the proposal involves waiting for an attacker to demonstrate their capabilities and then reacting accordingly. This 'wait and react' strategy relies 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. If the attacker unlocks the address, it serves as proof that the threat is real, triggering a network-wide freeze of older wallets. The proposal also includes a bounty system, where users can contribute bitcoin to incentivize the first entity to demonstrate a quantum attack, rather than attempting to steal vulnerable coins. However, this approach assumes that the attacker will prioritize claiming the bounty over executing a potentially massive theft. The 'canary' system is designed to reduce the risk of disrupting users prematurely, but it rests on the assumption that the first entity capable of breaking Bitcoin's security will behave in a predictable manner. If this assumption proves incorrect, the network may be exposed to the very catastrophe it is trying to prevent.