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Google Quantum AI Cuts ECDSA Attack to 1,200 Qubits as Bitcoin Ships PQ Fix

Google Quantum AI Cuts ECDSA Attack to 1,200 Qubits as Bitcoin Ships PQ Fix

Mar 31, 2026
Bitcoin Brief

Google Quantum AI Cuts ECDSA Attack to 1,200 Qubits as Bitcoin Ships PQ Fix

TFTC – Truth for the Commoner

Bitcoin Brief

Sup, freaks.

Google Quantum AI dropped a paper showing they can theoretically crack Bitcoin's ECDSA with fewer than 1,200 logical qubits. The headlines are predictably alarming. But the gap between a theoretical paper and a machine that can actually do this remains enormous, and Bitcoin developers are already building the post-quantum defenses. The real story is more nuanced than either the panic or the dismissal.


LEAD STORY

Google Quantum AI Cuts ECDSA Attack to 1,200 Qubits, but the Engineering Gap Remains Massive

Google Quantum AI published research showing they've tailored Shor's algorithm specifically for 256-bit elliptic curve discrete logarithm problems, the math that secures Bitcoin's ECDSA signatures. The resource requirements they've achieved on paper: fewer than 1,200 logical qubits, roughly 500,000 physical qubits, and executable in minutes. Google didn't publish the actual quantum circuits, just a zero-knowledge proof that their approach works, citing competitive and national security concerns. They're targeting 2029 for post-quantum readiness, aligning with NIST's timeline to deprecate RSA by 2030.

But before the headlines send anyone into a spiral, the physical engineering constraints of actually building these quantum computers remain enormous and largely unsolved. Google's paper describes 500,000 physical qubits. The largest quantum computer today has roughly 1,200 physical qubits (IBM's Condor), and those aren't the high-fidelity, error-corrected qubits needed for cryptographic attacks. Each "logical qubit" requires hundreds to thousands of physical qubits for error correction overhead. These machines operate at temperatures colder than outer space (15 millikelvin), require extreme isolation from electromagnetic interference, and face unsolved challenges in wiring, control electronics, and cryogenic cooling at scale. Getting from 1,200 noisy physical qubits to 500,000 fault-tolerant ones is not a software problem. It is a fundamental engineering problem that nobody has solved yet.

As Alex B pointed out, the gap between headline claims and engineering reality is even wider than it appears. Researchers at Caltech recently demonstrated a 6,000 logical qubit array using neutral atoms, but those qubits were not entangled, a hard requirement for running Shor's algorithm. The actual state of the art for entangled logical qubits under the neutral atom architecture? Ninety-six. Coherence time? One to two seconds. The time required to run the proposed attack algorithms? Days. That means entanglement capacity needs to increase by more than two orders of magnitude, and coherence must be maintained roughly 100,000 times longer than current capabilities allow. Nobody has a clear path to solving either problem, but that does not stop the headline-worthy papers from flowing.

That said, Bitcoin developers and cryptographers are not ignoring the threat. They're doing what good engineers do: preparing methodically. Jonas Nick introduced SHRIMPS, a new post-quantum signature scheme that produces 2.5KB hash-based signatures across multiple devices. It builds on SHRINCS, which achieved approximately 324-byte signatures for single-device use. SHRIMPS signatures are three times smaller than the NIST standard SLH-DSA, making them practical for Bitcoin's block space constraints. This follows Nick's December 2025 paper "Hash-based signatures for Bitcoin" co-authored with Mikhail Kudinov at Blockstream Research. If you want the full deep dive, Jonas and Mikhail joined us on the podcast to explain why Bitcoin's current signature scheme is theoretically broken in a post-quantum world and what the upgrade path looks like.

Meanwhile, BIP-360, authored by Hunter Beast, Ethan Heilman, and Isabel Foxen Duke, proposes Pay-to-Merkle-Root (P2MR), a new quantum-resistant output type that removes Taproot's quantum-vulnerable keypath spend. BIP-360 is already live on a Bitcoin testnet, with BTQ Technologies running transactions through it. The co-authors estimate the full upgrade could take up to seven years, which is why the research is happening now.

The key takeaway here is that the approach matters as much as the timeline. Rushing to implement quantum-resistant changes without rigorous testing and long-term thinking could introduce risks far worse than the quantum threat itself. A hasty soft fork or poorly vetted signature scheme deployed under panic could create vulnerabilities that are exploitable today, not in some theoretical future. Bitcoin's strength has always been its conservative upgrade process. The developers working on SHRIMPS and BIP-360 understand this. They're building the tools now so that when the time comes to deploy them, the protocol can upgrade deliberately, not desperately. Preparation without panic is the correct posture.


SIGNAL

Powell: Fed Can "Wait and See" on Iran Oil Shock

Why it matters: Fed patience has limits as oil threatens to reignite inflation expectations.

Fed Chair Jerome Powell said the central bank isn't facing an immediate policy decision over the oil price spike from Iran conflict, but emphasized patience has boundaries. Inflation expectations will shape the Fed's response more than the oil price itself. In the same remarks, Powell called the $39 trillion national debt "not unsustainable" while admitting the trajectory "will not end well." Translation: we'll print our way through energy shocks until bond markets force our hand.

Axios Supply Chain Attack Hits 100M+ Weekly Downloads

Why it matters: Textbook supply chain malware infiltrating critical JavaScript infrastructure.

Security researcher Feross flagged that axios@1.14.1 was compromised with malicious package plain-crypto-js. Axios is downloaded over 100 million times per week across JavaScript projects. The malware was designed as an installer that would execute during package installation, classic supply chain attack vector. This is why you pin your dependency versions and audit your supply chain. When the most widely-used HTTP client for JavaScript gets compromised, it's a wake-up call for the entire software stack.

Primal Ships No-KYC Lightning Wallet

Why it matters: Major Nostr client adds Lightning without identity verification requirements.

Paul Keating announced that Primal finally has a no-KYC wallet that "just works." This is significant because Primal is one of the most popular Nostr clients, and adding Lightning payments without identity requirements brings Bitcoin micropayments to a broader user base. No phone number, no email, no documents, just Lightning addresses tied to Nostr identities. This is how Bitcoin payments should work, pseudonymous by default, permissionless by design.

Oil Hits 3-Year High Above $105, Houthis Add Second Maritime Pressure Point

Why it matters: Red Sea disruption adds $20/barrel risk premium to already elevated prices.

Oil prices broke through $105 per barrel for the first time since 2023, with JPMorgan estimating the Red Sea shipping disruption adds approximately $20 per barrel in risk premium. Energy sector ETF (XLE) is showing its most overbought conditions since 2011. The Houthis have effectively created a second maritime choke point alongside traditional Middle East tensions. This isn't just geopolitics, it's structural inflation pressure that central banks can't print away.

The Median Home Has Tripled Since 1980. Wages Are Up 18%.

Why it matters: This is what currency debasement looks like measured in shelter.

One chart tells the story: the median home has tripled in price since 1980 after adjusting for inflation while wages over the same period are up just 18%. In 1980, the median home cost 3.9 times median household income. Today it costs 5 times. A 20% down payment went from $12,740 to over $83,000. The dollar has lost over 70% of its purchasing power since 1980. That doesn't show up on a grocery receipt all at once. It shows up over decades in the growing distance between what people earn and what things cost. The generation that bought homes at 3.9x income is telling the generation facing 5x income to work harder. The math does not support that advice.

Ten31 Recap: The Fed Can't Hike, and the Math Makes It Obvious

Why it matters: Non-discretionary spending is already bumping against the ceiling on receipts.

John Arnold broke it down on yesterday's Ten31 Timestamp recap: "Non-discretionary spend is already bumping up against the ceiling on receipts. You go much higher on rates and you get into pretty bad territory pretty quickly." The Fed's room to maneuver is far more constrained than the market believes. Interest expense on federal debt, mandatory entitlement spending, and defense outlays leave almost no fiscal slack. Rate hikes from here don't just slow the economy, they blow a hole in the federal budget that can only be filled by more borrowing or more printing. This is the trap that makes Bitcoin's fixed supply increasingly relevant.

China Factory Activity Returns to Growth

Why it matters: China better positioned for oil shock than Western peers due to energy mix.

Chinese manufacturing returned to expansion at the sharpest pace in a year, according to CNBC reporting on purchasing manager indices. China's lower reliance on oil and natural gas imports relative to Europe and parts of Asia positions them better for the current energy price shock. While Western economies face inflation pressure from higher energy costs, China's manufacturing sector is accelerating. This divergence in economic trajectory could accelerate de-dollarization trends as trade relationships realign around energy security.



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DATA SNAPSHOT

Bitcoin Price$66,795
Sats per Dollar1,497
Block Height943,060
Network Hashrate904.5 EH/s
Priority Fees3 sat/vB

On-Chain Metrics
MVRV Ratio1.23 — approaching fair value
STH Realized Price$82,933 — short-term holders underwater
SOPR0.98 — coins moving at slight loss
NUPL0.19 — low conviction zone
Net Realized P/L-$713M — network realizing losses
Realized Price$54,169 — aggregate cost basis

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Marty Bent


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