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

The Bitcoin community is considering a novel approach to addressing the potential risks posed by quantum computing. Instead of imposing a pre-emptive freeze on vulnerable coins, the proposed system would wait for an attacker to demonstrate their capabilities and then react accordingly. This 'wait and react' strategy relies on a 'canary' mechanism, 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 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 publicly. However, this approach assumes that the attacker will prioritize claiming the bounty over executing a large-scale theft. The 'canary' system is designed to reduce the risk of premature disruption to users, but it also introduces a level of uncertainty, as it is unclear whether an attacker would choose to reveal their capabilities or remain stealthy. The proposal is seen as an alternative to a fixed five-year timeline for implementing network-wide security updates, which has been met with criticism for being overly restrictive. The 'wait and react' strategy is intended to provide a more flexible and adaptive approach to responding to quantum computing threats, but it also raises questions about the potential risks and consequences of such an approach.