Bitcoin Developers Propose Alternative Plan 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-emptive freeze on vulnerable coins, the proposal involves a 'canary' system that would trigger a network-wide restriction only if a quantum-capable attacker demonstrates their capabilities on-chain. This approach is based on the assumption that the attacker would claim a bounty rather than exploiting the vulnerability for personal gain. The system works by placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker, serving as public proof of the threat and triggering a network-wide freeze. The proposal is designed to provide an alternative to a fixed five-year timeline for imposing restrictions, which has been met with criticism for being 'authoritarian and confiscatory.' The new approach includes a financial incentive, allowing users to contribute to a bounty that rewards the first entity to demonstrate a quantum attack, while also introducing a 'safety window' to make stealth attacks more difficult. However, the proposal relies on the bet that the first entity capable of breaking Bitcoin would claim the bounty rather than executing a large-scale theft, which may not be a reliable assumption.