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 implementing 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 succeeds in unlocking the address, it would serve as public proof of the threat and trigger a network-wide freeze on 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 for personal gain. However, this approach assumes that the attacker will prioritize claiming the bounty over maximizing their profits through theft, which may not be a reliable assumption. The proposal is designed to provide an alternative to a fixed five-year timeline for implementing security measures, which has been criticized for being overly restrictive and potentially undermining the core principles of the Bitcoin network. Critics argue that such an approach could lead to the confiscation of coins and undermine the network's security. The 'canary' system is intended to reduce the risk of premature disruption to users, but it rests on the assumption that the first entity capable of breaking Bitcoin's security will choose to claim the bounty rather than execute a large-scale theft. This bet goes against the network's historical emphasis on preventing worst-case scenarios, and the potential consequences of failure could be severe.