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 itself, as they attempt to build defenses against future quantum computers that could compromise the blockchain and steal coins. A recently updated proposal, Bitcoin Improvement Proposal (BIP)-361, suggests forcing bitcoin holders 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 Google report warning that a sufficiently powerful quantum machine could compromise the Bitcoin blockchain with less firepower than initially estimated. The proposal has sparked backlash from the community, with some citing it as authoritarian and confiscatory, while developers argue it is a necessary defensive measure. The proposal outlines a three-phase migration process, starting with blocking new bitcoin from being sent to old-style, quantum-vulnerable addresses, followed by rendering old-style signatures invalid, and finally, a potential rescue phase where holders with frozen wallets could prove ownership using a zero-knowledge proof.