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

The Bitcoin community is considering a new approach to address the potential threat of quantum computing to the network's security. Instead of imposing a pre-scheduled freeze on vulnerable coins, the proposal involves a 'wait and react' strategy that relies on a canary system to detect and respond to quantum attacks. This system would place a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker, triggering a network-wide freeze of older wallets if the threat is realized. The proposal also includes a financial incentive, allowing users to contribute to a bounty that rewards the first entity to demonstrate a quantum attack publicly. However, this approach assumes that the attacker will claim the bounty rather than attempting to steal vulnerable coins, which may not be a reliable assumption. The proposal is designed as an alternative to a controversial plan that would impose a fixed five-year timeline for phasing out vulnerable addresses, which has been criticized for being authoritarian and confiscatory. The new approach aims to balance the need to protect the network from quantum threats with the need to preserve the core principles of Bitcoin, including the control of private key holders.