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

The Bitcoin community is discussing a novel approach to addressing the potential threat of quantum computing to the network's security. Instead of implementing a pre-emptive freeze on vulnerable coins, the proposal involves waiting for a quantum-capable attacker to demonstrate their capabilities and then reacting accordingly. This 'wait and react' strategy is based on a 'canary' system, which would place a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker. If the attacker succeeds in unlocking the address, it would trigger a network-wide freeze on older bitcoin wallets. The proposal also includes a financial incentive, where users can contribute to a bounty that would reward the first entity to demonstrate a quantum attack. However, this approach relies on the assumption that the first entity capable of breaking Bitcoin's security would claim the bounty rather than attempting a large-scale theft. This assumption has raised concerns, as it goes against the network's design principle of preparing for worst-case scenarios. The proposal is seen as an alternative to a controversial plan that would impose a fixed five-year timeline for phasing out vulnerable addresses, 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 also carries the risk of failing to prevent a catastrophic attack if the assumptions underlying it prove to be incorrect.