Bitcoin Developers Propose Quantum Defense Measures, Potentially Freezing Vulnerable Coins

The promise of Bitcoin's security is being reevaluated as developers propose measures to defend against potential quantum computer threats. A recent update to the Bitcoin Improvement Proposal (BIP)-361 suggests forcing holders to migrate their coins to new, quantum-resistant addresses or risk having them frozen permanently. This move is intended to safeguard against a sufficiently powerful quantum machine that could compromise the Bitcoin blockchain and steal coins. The proposal involves a three-phase migration process, starting with blocking new bitcoin from being sent to old, quantum-vulnerable addresses, followed by rendering old-style signatures invalid, and potentially introducing a rescue phase using zero-knowledge proofs to recover frozen coins. However, the idea of freezing coins has sparked backlash within the community, with some viewing it as authoritarian and confiscatory, while developers argue it is a necessary defensive measure to protect the Bitcoin ecosystem.