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, the proposal involves waiting for a quantum-capable attacker to demonstrate their capabilities and then triggering a network-wide response. 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 accesses the funds, it will serve as public proof that the threat is real, and a network-wide freeze will be triggered to protect 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 exploit vulnerable wallets. However, this approach assumes that the attacker will prioritize claiming the bounty over executing a large-scale theft, which may not be a reliable assumption. The proposal is designed to provide an alternative to a fixed five-year timeline for imposing restrictions on older wallets, which has been criticized for being overly restrictive and potentially undermining the core principles of Bitcoin. The 'wait and react' strategy aims to balance the need to protect the network from quantum threats with the need to preserve the autonomy and security of individual users.