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

The Bitcoin community is exploring 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 considering a 'wait and react' strategy that would only trigger a network-wide restriction if a quantum-capable attacker demonstrates their capabilities. This approach, outlined in a recent proposal 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 public proof of the threat. The proposal also includes a bounty system to incentivize the first entity to demonstrate a quantum attack, rather than exploiting the vulnerability for personal gain. However, this approach relies on the assumption that the first entity to demonstrate a quantum attack will claim the bounty rather than attempting to steal vulnerable coins, which may not be a reliable bet. The proposal is designed as an alternative to a fixed five-year timeline for imposing network-wide restrictions, which has been met with criticism for being 'authoritarian and confiscatory'. The new approach aims to balance the need to protect the network from quantum threats with the need to preserve the core principles of Bitcoin, including the control of private key holders. The introduction of a 'safety window' is also designed to make stealth attacks more difficult, by allowing vulnerable coins to move but restricting the recipient's ability to spend them for an extended period. While the proposal reduces the risk of disrupting users prematurely, it ultimately relies on an uncertain bet that the first entity capable of breaking Bitcoin's security will choose to claim a bounty rather than execute a potentially catastrophic theft.