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: instead of implementing a pre-emptive freeze on vulnerable coins, the network would wait for an attacker to demonstrate their capabilities and then react. This 'wait and react' strategy is based on a 'canary' system, which would involve placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker. If the address is accessed, it would trigger a network-wide freeze on older wallets, thereby protecting users' funds. 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. This approach is designed to provide a more flexible and responsive solution to the quantum computing threat, rather than imposing a fixed timeline for restrictions. However, it relies on the assumption that the first entity to demonstrate a quantum attack will claim the bounty rather than attempting to steal funds, which may not be a reliable bet. The proposal is seen as an alternative to BIP-361, which would impose restrictions on a fixed five-year timeline, regardless of whether quantum computers are capable of attacking the blockchain. Critics of BIP-361 argue that it undermines Bitcoin's core principle of user control and could lead to the confiscation of funds. The 'wait and react' strategy, on the other hand, is designed to minimize disruption to users while still providing a level of protection against quantum computing threats.