Bitcoin Developers Propose 'Wait and React' Strategy Against Quantum Computing Threats

The Bitcoin community is considering a new approach to addressing the potential threat of quantum computing to the network's security. Instead of implementing a pre-scheduled freeze on vulnerable coins, the proposal involves waiting for an attacker to demonstrate their capabilities and then reacting accordingly. 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 attacker unlocks the address, it triggers a network-wide freeze on older wallets. The proposal also includes a bounty system, where users can contribute bitcoin to incentivize the first entity to demonstrate a quantum attack, rather than exploiting the vulnerability for personal gain. However, this approach assumes that the attacker will prioritize claiming the bounty over carrying out a potentially massive theft. The proposal is designed to provide an alternative to a fixed five-year timeline for implementing restrictions on vulnerable addresses, 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 principles of user control and decentralization that underpin Bitcoin. If successful, the canary system could provide a more flexible and responsive approach to addressing the risks posed by quantum computing, but it also relies on an uncertain bet that the first attacker will act in a predictable manner.