Post-Quantum Lightning Defence Claimed
Experts are sharply divided over how urgently AI and quantum advances threaten existing blockchain wallet cryptography.
Researchers from four American universities, led by Dr Ahmet Kurt of East Texas A&M, say they have built the first working post-quantum defence for Lightning, Bitcoin’s payments layer: government-standardised algorithms layered on its existing cryptography, so an attacker must break both. The claim is the team’s own, with no independent audit yet. Separately, Imperial College researchers published a no-soft-fork design as a paper, and Coinbase outlined priorities for Bitcoin’s own migration.
Quantum defence: you don’t fix a network once
The quantum story changed sides this week. After a fortnight of warnings, the defenders shipped something.
Researchers at four American universities added quantum-resistant cryptography to Lightning, bitcoin’s fast-payment layer. Not a demo, they say — a complete working implementation.
Their quiet observation matters most. Even if bitcoin’s base chain gets upgraded against quantum computers, Lightning stays exposed. The payments layer runs its own communications and payment requests, with its own cryptography to crack.
The fix is a second lock. New government-standardised algorithms sit on top of the old ones, so an attacker has to break both to forge a payment request.
The caveats are real. The claim is the team’s own. No independent audit yet. Nobody runs it in production.
But the lesson stands either way. The quantum problem is not one wall. It’s the base chain, then Lightning, then every exchange and wallet — each a separate job.
You don’t fix this network once. You fix it in pieces, forever.
Related storylines
- Bitcoin quantum threat responseBitcoin post-quantum cryptographic defenses implementation
3 sources
- Quantum-Resistant Bitcoin Just Arrived – And It Doesn’t Need a Soft Fork · coinpedia.org · T2
- Researchers Build First Working Post-Quantum Defense for Bitcoin’s Lightning Network · bitcoinmagazine.com · T1
- Coinbase lays out flexible designs as key priority for Bitcoin’s post-quantum migration · theblock.co · T1