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

The Bitcoin community is considering a novel approach to addressing the potential threat of quantum computing to the network's security. Instead of implementing a pre-emptive freeze on vulnerable coins, the proposed system would wait for an attacker to demonstrate their capabilities and then react by triggering a network-wide restriction. This 'canary' system, outlined by BitMEX Research, involves placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker. If the attacker succeeds in unlocking the address, it would serve as public proof that the threat is real, automatically triggering a freeze on older wallets. 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 introduces a financial incentive, allowing users to contribute to a bounty that would reward the first entity to demonstrate a quantum attack. However, the proposal relies on the assumption that the first attacker would claim the bounty rather than exploiting the vulnerability for personal gain, which some argue is an uncomfortable bet that goes against Bitcoin's design principles.