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 imposing a pre-emptive freeze on vulnerable coins, developers are discussing a 'wait and react' strategy that would only trigger a network-wide restriction if a quantum-capable attacker demonstrates their capabilities on-chain. This approach, proposed by BitMEX Research, involves placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker, serving as a 'canary' to detect and respond to potential threats. The proposal also includes a financial incentive, allowing users to contribute to a bounty that would reward 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 contradicts the network's design principles and historical resistance to protocol-level interventions. The proposal is seen as an alternative to BIP-361, which would impose a fixed five-year timeline for phasing out vulnerable addresses and invalidating old signature schemes. Critics have argued that BIP-361's approach is 'authoritarian and confiscatory,' undermining Bitcoin's core principle of private key holder control. The new proposal aims to balance the need to address the quantum computing threat with the need to preserve the network's decentralized and permissionless nature.