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

The Bitcoin community is considering a novel approach to address the potential threat of quantum computing, which could compromise the security of the network. 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 demonstrates their capability on-chain. 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 a public proof of the threat. The proposal includes a bounty system to incentivize the first entity to demonstrate a quantum attack, rather than exploiting the vulnerability for personal gain. However, this approach relies on the assumption that the attacker will claim the bounty rather than executing a large-scale theft, which may not be a guaranteed outcome. The 'wait and react' strategy is designed to provide a more flexible and user-centric approach, avoiding the potential risks of a fixed-timeline defense, but it also introduces new risks and uncertainties. The proposal is seen as an alternative to the controversial BIP-361, which would impose a fixed five-year timeline for phasing out vulnerable addresses and invalidating old signature schemes. Critics of BIP-361 argue that it undermines the core principle of Bitcoin, which is that control rests solely with private key holders. The 'wait and react' strategy is still in the debate stage, and its feasibility and potential consequences are being carefully evaluated by the Bitcoin community.