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

The Bitcoin community is exploring a novel approach to addressing the potential threat of quantum computing to the network's security. Instead of imposing a blanket freeze on vulnerable coins after a fixed period, the proposed 'canary' system would only trigger a network-wide lockdown if a quantum-capable attacker demonstrates their capabilities on-chain. This 'wait and react' strategy relies on the attacker claiming a bounty for revealing their capabilities, rather than exploiting the vulnerability for personal gain. The system involves placing a small amount of bitcoin in a special address that can only be unlocked by a quantum-capable attacker, triggering a network-wide freeze of older wallets if the address is accessed. This approach aims to mitigate the risk of premature disruption to users, while also providing a financial incentive for the first entity to demonstrate a quantum attack. However, this strategy is not without its risks, as it assumes the attacker will prioritize the bounty over the potential for a massive theft. If this assumption proves incorrect, the network may be left vulnerable to a catastrophic attack, highlighting the challenges of balancing security with the principles of decentralization and user control.