Most of the internet runs on RSA encryption. Your bank, your email, your medical records. The prevailing assumption has been that cracking RSA-2048, the standard protecting most of that infrastructure, would require a quantum computer with millions of physical qubits. Nobody is close to building that. On February 13, 2026, a Sydney-based startup called Iceberg Quantum announced an architecture it claims could do the job with fewer than 100,000 physical qubits. If that number holds up, the timeline for when all of our encryption needs upgrading just got considerably shorter.
On paper.
What Iceberg Built
Pinnacle is Iceberg Quantum’s first full fault-tolerant quantum computing architecture. It relies on Quantum Low-Density Parity Check (QLDPC) codes, specifically a variant called generalized bicycle codes, to achieve fault tolerance with dramatically less overhead than the surface code approaches most of the industry uses today. Surface codes are the dominant method for correcting quantum errors, but they are expensive. They require enormous numbers of physical qubits to protect each logical qubit. QLDPC codes compress that overhead, and Pinnacle’s design pushes the compression further than prior proposals.
The company was founded by Felix Thomsen, Larry Cohen, and Sam Smith, all University of Sydney PhDs. They announced a $6 million seed round led by LocalGlobe, with participation from Blackbird and DCVC. Iceberg has also secured partnerships with PsiQuantum, Diraq, and IonQ, and plans to expand operations to Berlin and the United States.
Separating the Paper From the Press Release
Here is what the claim actually says: numerical simulations indicate that the Pinnacle architecture could, in theory, reduce the physical qubit requirements for breaking RSA-2048 from millions down to under 100,000. That is a meaningful advance in error correction theory. It is not a demonstration on hardware. No physical qubits were entangled. No encryption was broken.
This distinction matters enormously. The largest quantum computers currently operating have roughly 1,000 to 1,500 qubits, and those qubits have error rates far too high for fault-tolerant computation. The gap between a simulation showing 100,000 qubits could theoretically suffice and actually building a 100,000-qubit machine that operates at the required fidelity is vast. The quantum error correction breakthroughs reported across the industry in recent months are real, but they measure progress in single-digit logical qubits, not the thousands that Pinnacle’s architecture would require.
The $6 million seed round is also worth contextualizing. That is a modest sum in quantum computing, an industry where PsiQuantum alone has raised over $700 million and where government programs routinely deploy billions. Iceberg is early stage in every sense.
That said, dismissing theoretical architecture work because the hardware does not exist yet is precisely how people miss breakthroughs before they arrive. QLDPC codes represent a genuine shift in how the field thinks about fault tolerance. The mathematics behind generalized bicycle codes has been validated by multiple research groups, and the overhead reductions are real, not speculative numerology. Every fault-tolerant quantum computer that eventually gets built will rely on theoretical architecture that preceded the hardware by years. Iceberg’s contribution may prove foundational even if the company itself never builds a physical machine. The value is in the blueprint, not the press release.
What This Actually Means
Put simply: most internet security relies on the assumption that certain math problems are too hard for any computer to solve. RSA encryption is built on that assumption. Quantum computers threaten it because they can, in theory, solve those problems. The conventional wisdom said you would need millions of qubits to do it, and nobody would have millions of qubits for decades. Iceberg’s claim, if validated, says the number might be closer to 100,000. That is still far beyond what exists today, but it compresses the threat timeline from “distant future” to “plausible within a generation.”
The US government has already mandated a transition to post-quantum cryptography standards, recognizing that encrypted data harvested today could be decrypted by future quantum machines. Every reduction in the qubit threshold for breaking RSA makes that migration more urgent. For banks, governments, healthcare systems, and anyone storing sensitive data with long shelf lives, the Pinnacle announcement is another signal that the “harvest now, decrypt later” threat to cryptographic systems is not theoretical paranoia. It is an engineering countdown.
Whether the countdown reads decades or years depends on how quickly the gap between simulation and silicon closes. Iceberg Quantum has offered a compelling argument that the finish line is closer than we thought. Building the road to reach it is another matter entirely., published research
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