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

The Bitcoin community is considering a novel approach to mitigate the risks posed by quantum computing: delaying the implementation of security measures until an actual threat is detected. However, this plan relies on the assumption that a potential attacker would prioritize claiming a bounty over exploiting the vulnerability for personal gain. A recent proposal outlines a system where a small amount of bitcoin is placed in a special address that can only be accessed by a quantum-capable attacker, triggering a network-wide freeze of older wallets if the funds are spent. This 'wait and react' strategy is designed to replace a previously proposed five-year timeline for imposing restrictions on vulnerable bitcoin wallets. The new approach includes a financial incentive, allowing users to contribute to a bounty that rewards the first entity to demonstrate a quantum attack, as well as a 'safety window' that makes stealth attacks more difficult by restricting the movement of vulnerable coins. While this proposal reduces the risk of premature disruption to users, it hinges on the uncertain bet that the first entity capable of breaking Bitcoin's security would choose to claim the bounty rather than execute a large-scale theft.