PQC - What is our Goal, Even?

In a recent discussion on the Bitcoin Development Mailing List, a key point was highlighted regarding the challenges and possible strategies in managing wallet migrations in response to potential system attacks. The conversation focused on the issues faced by wallets that are less likely to migrate and the importance of maintaining scope discipline in such scenarios. A significant insight was shared about the utility of post-quantum cryptography (PQ) signed records tied to the pre-attack Unspent Transaction Output (UTXO) state. This approach is considered crucial for distinguishing between original owners and those claiming ownership post-attack. It was emphasized that this method might be one of the few available options on the ecosystem side to preserve evidence of prior control without depending on wallet vendors to implement new solutions.

Furthermore, the dialogue underscored the necessity of preparing for a potential 'fork-and-burn' decision, as mentioned in the earlier part of the discussion. Such preparation would involve keeping minor distinctions in mind, particularly how PQ-signed records could play a role in resolving ownership disputes following an attack, albeit not addressing the entire spend-path dilemma directly. This exchange reflects ongoing efforts and strategic thinking within the Bitcoin community to enhance security and adaptability in the face of evolving threats.