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

A recent proposal is sparking debate among Bitcoin developers, suggesting a shift in how the network responds to potential quantum computing threats. Rather than preemptively freezing vulnerable coins, the proposal recommends waiting for an attacker to demonstrate their capabilities, at which point a network-wide restriction would be triggered. This 'wait and react' strategy relies on a 'canary' system, where a small amount of bitcoin is placed in a special address that can only be unlocked by a quantum-capable attacker. If the address is accessed, it serves as proof that the threat is real and automatically initiates a network-wide freeze of older wallets. The proposal is designed to provide an alternative to a fixed five-year timeline for addressing the potential risks posed by quantum computers, which some experts believe could be capable of breaking Bitcoin's digital signature schemes by the end of the decade. The approach includes a financial incentive, allowing users to contribute to a bounty that would reward the first entity to demonstrate a quantum attack publicly. However, critics argue that this strategy rests on the assumption that the first entity capable of breaking Bitcoin would claim the bounty rather than carrying out a large-scale theft, which is a bet that cuts against the network's design principles and historical approach to preventing worst-case scenarios.