Bitcoin Developers Propose Alternative Plan to Counter Quantum Computing Threat

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 'wait and react' strategy, where the network would only take action if a quantum-capable attacker demonstrates their capabilities. This approach is based on a 'canary' system, which would trigger a network-wide restriction on older bitcoin wallets if a quantum attack is detected. The system works by placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker, and any spend from that address would serve as public proof that the threat has arrived, automatically triggering a network-wide freeze. The proposal also includes a financial incentive, where users can contribute to a bounty that rewards the first entity to demonstrate a quantum attack publicly. However, this approach relies on the assumption that the first entity capable of breaking Bitcoin's security would claim the bounty rather than attempting a large-scale theft. This assumption has raised concerns, as it goes against the network's design principle of preparing for worst-case scenarios. The proposal is seen as an alternative to BIP-361, which would impose a fixed five-year timeline for freezing vulnerable coins, a plan that has been criticized for being 'authoritarian and confiscatory.' The new proposal aims to balance the need to protect the network from quantum threats with the need to preserve the core principles of Bitcoin, including user control and autonomy.