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 to the network's security. Instead of implementing a pre-defined timeline for freezing vulnerable coins, developers are proposing a 'wait and react' strategy that relies on detecting and responding to actual quantum attacks. This approach, outlined in a recent proposal by BitMEX Research, involves creating a 'canary' system that triggers a network-wide freeze of older wallets only if a quantum-capable attacker demonstrates their capabilities on-chain. The system works by placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker, with any spend from that address serving as public proof that the threat has arrived. The proposal also includes a financial incentive, allowing users to contribute bitcoin to the address and create a bounty that rewards the first entity to demonstrate a quantum attack publicly. This approach is designed to provide an alternative to a fixed five-year timeline for imposing security measures, which has been criticized for being 'authoritarian and confiscatory.' However, the 'wait and react' strategy relies on the assumption that the first entity capable of breaking Bitcoin's security will claim the bounty rather than executing a large-scale theft, which may not be a reliable bet.