story // 4 dispatches over 164 days
The google story
From mar 31 to sep 11. It travelled bitcoinminingenergy. Every dispatch below uses at least one of its words: “google”.
- Google Cut the Estimated Qubit Threshold for Breaking Bitcoin by 20x
On March 31, Google's Quantum AI team published a whitepaper arguing that breaking elliptic-curve cryptography — the signature scheme securing Bitcoin — may require far fewer quantum resources than prior estimates. The headline number of fewer than 500,000 physical qubits is a 20x reduction from what was previously modeled. The '9-minute attack with 41% success rate' framing circulating in crypto media is a scenario estimate from secondary coverage, not Google's primary claim. What Google actually established is more significant and more durable: the hardware bar is materially lower than the industry assumed, and the case for post-quantum migration planning is now more urgent.
“google”
- Four Bitcoin Proposals for Surviving a Quantum Attack
Google's March 31 whitepaper compressed the estimated qubit threshold for breaking Bitcoin's elliptic-curve cryptography by 20x. Bitcoin developers have known the threat was coming for years. There are now four concrete proposals in various states of development — BIP-360, SPHINCS+, SHRIMPS, and Hourglass V2. None are activated. None have a scheduled deployment. The governance problem may be harder than the cryptography problem.
“google”
- Two Papers Reframe Bitcoin's Quantum Threat as Mostly Misunderstood
The week after Google's quantum paper compressed the estimated hardware threshold for breaking Bitcoin's cryptography, two academic papers pushed back on how the threat is being framed in crypto media. One found that a quantum 51% attack on Bitcoin mining would require star-level energy. Another replicated every major quantum factoring breakthrough of the past 20 years using a 1981 home computer, an abacus, and a dog. Neither dismisses the threat. Both refocus it on where it actually sits.
- AI Agents and 100 Researchers Halved Google's Quantum Benchmark for Bitcoin's Curve. The Exposed Key Is What You Control
A paper posted to arXiv this week reports that more than 100 researchers and their AI coding agents, working in an open challenge run by Eigen Labs, cut a benchmark for the core arithmetic of a quantum attack on Bitcoin's signature curve by 86% in about 8 weeks, landing at half the figure Google published in March. The circuit breaks nothing, and no machine exists to run it. What it measures is how fast the estimates move, and they now move in weeks. For a holder, the one variable that matters is whether your public key is already on the chain.
“google”