Against Allowing Quantum Recovery of Bitcoin

The discussion initiated by Jameson Lopp on the Bitcoin Development Mailing List emphasizes the proactive integration of post-quantum cryptography (PQC) into Bitcoin's security framework. The idea proposed suggests that, to prepare for future scenarios where it might become necessary to seize non-PQC protected coins, wallets should begin embedding PQC public keys in their outputs well in advance. This implementation should occur at least a decade before any potential enforcement actions to ensure sufficient preparation and safety margins.

The specific cryptographic method recommended is a straightforward OP_HASHBASEDSIG, likely utilizing SPHINCS+, incorporated into tapscript. This approach would allow for the inclusion of hidden PQC keys within Bitcoin's taptrees, including configurations for multisig setups. This strategy underscores the urgency of updating Bitcoin's cryptographic practices to safeguard against future quantum threats while maintaining flexibility in managing blockchain assets securely and efficiently. Such preemptive measures are crucial for maintaining the integrity and reliability of the cryptocurrency in the face of evolving technological landscapes.