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: rather than preemptively freezing vulnerable coins, the network would wait for an attacker to demonstrate their capabilities and then react. However, this plan relies on the assumption that the attacker will choose to claim a bounty instead of exploiting the vulnerability for personal gain. The proposed 'canary' system involves placing a small amount of bitcoin in a special address that can only be accessed by a quantum-capable attacker, triggering a network-wide freeze of older wallets if the address is compromised. This approach is designed to provide an alternative to a fixed five-year timeline for imposing restrictions on older bitcoin wallets. The proposal has sparked debate, with some critics arguing that it undermines Bitcoin's core principles and others seeing it as a more flexible and user-friendly solution. A key aspect of the proposal is the introduction of a financial incentive, where users can contribute to a bounty that rewards the first entity to demonstrate a quantum attack. The plan also includes a 'safety window' to prevent stealth attacks and make it more difficult for attackers to quietly drain vulnerable wallets. While the proposal aims to reduce the risk of disrupting users prematurely, it ultimately rests on the bet that the first entity capable of breaking Bitcoin will choose to claim the bounty rather than carry out a large-scale theft.