Trivial QC signatures with clean upgrade path

This path does not require a softfork to be committed, making it possible for wallets to start integrating this fallback mechanism as soon as the specification is finalized. This approach allows for immediate action without needing to wait for any softfork activations. However, there is a significant security consideration that needs to be addressed: the post-QC script must be protected similarly to a private key. This presents a particular challenge for hardware wallets, though the suggestion implies there might be solutions to overcome this obstacle.

This information originates from the Bitcoin Development Mailing List, emphasizing the ongoing discussions and developments in the space of cryptocurrency security and adaptability to future technological advancements such as quantum computing.