Bitcoin Developers Propose Alternative Plan to Counter Quantum Computing Threats

The Bitcoin community is considering a novel approach to addressing the potential threat of quantum computing to the network's security. Instead of implementing a pre-emptive freeze on vulnerable coins, the proposal involves waiting for an attacker to demonstrate their capabilities and then responding accordingly. This 'wait and react' strategy is based 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 compromised, it serves as proof that the threat is real, triggering 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 relies on the assumption that the attacker will choose to claim the bounty rather than maximizing their profits through theft. This assumption has raised concerns, as it goes against the network's core principle of prioritizing security and decentralization. The proposal is seen as an alternative to BIP-361, which suggests a fixed five-year timeline for phasing out vulnerable addresses and invalidating old signature schemes. Critics have argued that this approach is overly restrictive and could lead to the confiscation of coins. The new proposal aims to find a balance between security and flexibility, but its success depends on the attacker's behavior, which is difficult to predict.