Bitcoin Developers Propose Quantum Defenses, Potentially Freezing Vulnerable Coins

The promise of Bitcoin has always been that no one can access your coins without your private key. However, this promise is now being challenged by the developer community as they attempt to build defenses against future quantum computers. A proposal, known as Bitcoin Improvement Proposal (BIP)-361, has been updated to include a plan to migrate coins to quantum-resistant addresses or face having them frozen by the network. This move is in response to a recent Google report warning that a powerful quantum machine could compromise the Bitcoin blockchain more easily than initially thought. The proposal is met with backlash from the community, who see it as a violation of Bitcoin's fundamental principle of permissionless control over funds. The plan involves three phases, with the first phase blocking new bitcoin from being sent to old-style addresses, the second phase rendering old-style signatures invalid, and the third phase potentially allowing holders to recover frozen coins using zero-knowledge proof. Developers argue that this is a defensive measure to protect the Bitcoin ecosystem, but the community remains skeptical.