Bitcoin just made a meaningful step toward future quantum resistance 💪 An updated version of BIP 360 has just been merged into the official Bitcoin BIP GitHub repository. The update introduces Pay-to-Merkle-Root (P2MR), a proposed new output type that omits Taproot’s quantum-vulnerable key-path spend while preserving compatibility with Tapscript and script trees. It also includes: - Removal of Taproot’s quantum-vulnerable key-path spend in a separate opt-in new output type. - A foundation for introducing post-quantum signatures while using Tapscript/script tree for spend time optionality. - The change is a soft fork that does not affect existing Taproot outputs. - Addition of Isabel Foxen Duke as co-author, to ensure the BIP was clear and understandable to the general public, not just the Bitcoin developer community. The BIP also addresses criticism about Bitcoin devs not taking the quantum threat seriously. We are grateful to every Bitcoin contributor who took the time to review and provide feedback. Check the fully updated version of BIP 360: