A Post-Quantum Path for BIP 324

A bitcoin-dev mailing list post proposing a way to make BIP-324 — bitcoin's encrypted peer-to-peer transport — resistant to quantum attacks. BIP-324 today establishes session keys with an elliptic-curve key exchange, which a sufficiently powerful quantum computer could break, so the thread sketches swapping in a post-quantum key-encapsulation mechanism.

The discussion is a useful reminder that quantum risk is not only about spending signatures: the network's transport encryption rests on classical assumptions too, though breaking it threatens confidentiality of P2P traffic rather than letting an attacker steal coins. Replies debate whether to build a bespoke scheme or adopt TLS 1.3 (with its standardized hybrid post-quantum handshakes) as the transport instead.