Bitcoin Developers Propose Freezing Coins to Counter Quantum Threats, Sparking Controversy

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 the possibility of freezing coins that are not migrated to quantum-resistant addresses. This move has sparked controversy, with some arguing it goes against the fundamental principle of Bitcoin that whoever holds the private keys controls the coins. The proposal is a response to a recent Google report warning that a sufficiently powerful quantum machine could compromise the Bitcoin blockchain and steal coins. The report estimated that approximately 6.7 million BTC are in vulnerable addresses. The proposed solution involves a three-phase migration process, starting with blocking new bitcoin from being sent to old-style addresses, then rendering old-style signatures invalid, and finally, potentially allowing holders to recover frozen coins using zero-knowledge proof. The community is divided, with some calling the proposal authoritarian and confiscatory, while developers argue it is a necessary defensive measure to protect the Bitcoin ecosystem.