Bitcoin Developers Propose 'Wait and React' Strategy to Counter Quantum Threat

A novel approach is being considered by Bitcoin developers 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 waiting for a quantum-capable attacker to demonstrate their capabilities and then triggering a network-wide response. The 'canary' system, as outlined by BitMEX Research, would involve placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker. If the address is accessed, it would serve as public proof that the quantum threat has arrived, automatically triggering a network-wide freeze on older wallets. This approach is designed to provide an alternative to a fixed five-year timeline for implementing protections against quantum computing threats, which some critics have argued could be overly restrictive and undermine the principles of Bitcoin. The proposal also includes a financial incentive, where users can contribute to a bounty that would reward the first entity to demonstrate a quantum attack. However, this approach relies on the assumption that the first quantum-capable attacker will choose to claim the bounty rather than exploiting the vulnerability for personal gain, which some argue is an uncomfortable bet given the potential risks involved.