Bitcoin Developers Merge Updated BIP 360 Proposing P2MR to Reduce Quantum Key-Path Risk
Bitcoin developers merged an updated BIP 360 into the official Bitcoin BIPs repository, the repository shows. The proposal introduces Pay to Merkle Root (P2MR), an opt-in output type that eliminates Taproot's quantum-vulnerable key-path spending. P2MR is implemented as a soft fork, leaving existing Taproot outputs unchanged.