Bitcoin Developers Propose Freezing Coins Vulnerable to Quantum Attacks

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 in an effort to build defenses against future quantum computers. A recently updated proposal, Bitcoin Improvement Proposal (BIP)-361, suggests that bitcoin holders may be forced to migrate their coins to new quantum-resistant addresses or risk having them frozen permanently by the network. This move is in response to a warning from a Google report that a sufficiently powerful quantum machine could compromise the Bitcoin blockchain more easily than initially thought. The proposal, put forward by Jameson Loop and other cryptographers, aims to protect against the potential risks of quantum computers by freezing coins in vulnerable addresses. Every Bitcoin wallet is secured by a form of cryptography called ECDSA, which can be reverse-engineered by a powerful quantum machine, allowing hackers to drain funds. As of March, approximately 6.7 million BTC were 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 has pushed back against the proposal, citing concerns that it undermines Bitcoin's fundamental promise of sovereign control over funds. While some see it as a necessary defensive measure, others argue that it is overly authoritarian and confiscatory.