Bitcoin Developers Propose Freezing Vulnerable Coins to Counter Quantum Threats

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 try to build defenses against future quantum computers. A proposal, Bitcoin Improvement Proposal (BIP)-361, has been updated, which could force Bitcoin holders to migrate their coins to new quantum-resistant addresses or face having their coins frozen. The proposal is a response to a recent Google report that warned a sufficiently powerful quantum machine could compromise the Bitcoin blockchain. The Bitcoin blockchain uses a form of cryptography called ECDSA, which can be reverse-engineered by a powerful quantum machine, allowing hackers to drain funds. Approximately 6.7 million BTC are in vulnerable addresses. The proposal structures the migration in 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 prove ownership and recover frozen coins. The community is divided, with some viewing the proposal as a necessary defense and others seeing it as an overreach that undermines Bitcoin's core principles.