Quantum Computing News, PQC News, Quantum Security News & Commentary
What’s Happening in Quantum — and What It Means
IonQ Shows a Single Laptop CPU Can Decode a Simulated 408-Logical-Qubit Trapped-Ion Computer in Real Time
IonQ researchers decoded simulated trapped-ion workloads on 12 Apple M4 Max cores, the largest with 408 logical qubits and another with over a million T gates, adding under 0.3% delay at a two-qubit error rate of one in 10,000 ...
China’s Next-Generation Crypto Candidates Drew 104 Public Findings in Three Days. Researchers Broke Five Designs on Day Two
Within three days of China publishing its first-round candidates, public reports listed 104 findings against 65 of them. Saarinen's AI-assisted sweep found code bugs; researchers posting to ICCS's own forums found the design breaks ...
FIPS 140-2 Goes Historical Today – What Actually Changes and What Doesn’t
Every remaining FIPS 140-2 certificate moves to the CMVP Historical list on September 21, 2026. The sunset changes procurement, not operations – but the supply-side gap in FIPS 140-3 validated modules makes the transition harder than the seven-year runway implied ...
Apple Joins the Merkle Tree Certificate Consensus – and Raises the Bar
Apple's Root Program has committed to Merkle Tree Certificates for TLS with requirements that go beyond Chrome's in key respects, while taking the composite-algorithm path for S/MIME – confirming the two-track PKI fork organizations must plan for ...
RSA-896 Factored With Claude on Spare GPUs, 16 Days After RSA-260
Stephen Weis of Anthropic used Claude to port CADO-NFS to GPUs and factored RSA-896 on idle capacity, 16 days after Cognition's RSA-260 record. RSA-2048 remains about 35 billion times harder and needs a quantum computer ...
UPenn Turns Diamond Crosstalk Into a Four-Qubit Entangling Gate at Room Temperature
University of Pennsylvania researchers generated a four-qubit entangled state inside a diamond at room temperature in 14.8 microseconds – about ten times faster than the sequential approach tested in the same register – by converting crosstalk into parallel conditional gates ...
Surface Code Runs Below Threshold on IBM Heavy-Hex – But Only in One Direction at a Time
Researchers showed that error suppression can work on hardware whose geometry was never designed for the surface code – a result that broadens the viable hardware base for fault-tolerant quantum computing, though full isotropic scaling has not been shown ...
Infleqtion and NVIDIA Build a qLDPC Compiler Pipeline, But the Code Has Not Yet Run on Hardware
Infleqtion integrated its open-source qLDPC library with NVIDIA's new CUDA-Q Logical compiler layer, validating a code that encodes 18 logical qubits in 98 physical data qubits. The software pipeline works. Physical execution is next ...
IBM’s Spacetime PEC Cuts Error-Mitigation Sampling Overhead 63× – But the Exponential Wall Remains
IBM researchers combined probabilistic error cancellation with post-selected error detection, reducing sampling overhead by up to 63× on a 49-qubit subset of IBM's 156-qubit Heron processor. The result extends near-term error mitigation but does not eliminate its exponential cost ...
Altera and Riverlane Validate QECi on Agilex FPGAs – and the Day After, Qblox Closes the Real-Time QEC Loop at 6.9 µs
Riverlane validated QECi on Altera Agilex 7 FPGAs on September 10, and Qblox closed a real-time QEC loop over it the next day using emulated qubit data. QECi is the first purpose-built, open-source, multi-vendor QEC interface stack with closed-loop results ...
Cloudflare’s 1.1.1.1 Now Validates Post-Quantum DNSSEC Signatures – And Shows Why PQC Migration Is a Systems Problem
Cloudflare enabled ML-DSA-44 DNSSEC validation on its 1.1.1.1 resolver. No other major public resolver has announced equivalent support. The move exposes transport, downgrade, and chain-of-trust challenges that will define PQC migration beyond TLS ...
Xanadu and AMD’s Backline Opens a Third Front in the Quantum Control Stack Race
Xanadu and AMD released Backline, an open-source platform that connects quantum control hardware to standard AMD CPUs with sub-3µs round-trip latency. The announcement adds a third architectural option to a control-stack race that includes NVIDIA's NVQLink and Riverlane's QECi ...
Quantum Capability Has Doubled Every One to Two Years. Sandia Says the Early-2030s Roadmaps Need Four Times That.
A Sandia-led team ran identical circuits on Google, IBM and Quantinuum processors, then on a fault-tolerant architecture built from logical qubits. The encoded version reached 2.7% of the raw machine's score ...
Chip-Based QKD Has a Glow Problem: VOA Luminescence Creates a Side Channel That Standard Security Analyses Miss
A peer-reviewed study finds that variable optical attenuators in integrated QKD chips emit unintended light near 1107 nm. The emission creates a wavelength-resolved side channel that standard BB84 security analyses do not account for, and the modeled impact on key rates is severe ...
Quantinuum’s Helix Demonstrates How a Compact Error-Correcting Code Can Compute
Quantinuum's Helix architecture demonstrates logical memory, Clifford computation and an inter-code interface on Helios – all without postselection. The gap between these components and sustained universal computation defines what comes next ...
Fujitsu Built a Diamond-Spin Quantum Prototype. The Numbers That Would Prove It Scales Are Missing.
Fujitsu says it has built the first diamond-spin quantum computer prototype to integrate a tin-vacancy center with an on-chip photonic circuit. The fabrication is real. The scalability metrics that would validate the modular architecture are not yet published ...
Altera Ships ML-DSA Secure Boot on Agilex FPGAs – PQC Reaches the Silicon Root of Trust
Altera began shipping ML-DSA secure boot on its Agilex 3 and Agilex 5 FPGAs on September 8, 2026 – the first general-purpose FPGA family with post-quantum firmware authentication as a production feature, not a roadmap item ...
IonQ Compiles Shor’s Attack on secp256k1 Down to 19,397 Ions and 26 Days per Attempt
IonQ has compiled a full ECDLP-256 attack to a trapped-ion design that does not exist, charging every Clifford, measurement and ion transport. The accounting is the most detailed I have seen. The error rates, cycle time and machine are assumptions ...
