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QKD is provably secure only if its devices behave as modeled and its classical channel is already authenticated. NSA, the NCSC, and four European agencies allow it a niche role at most, citing implementation attacks, trusted relays, and cost.
Rydberg-atom receivers sense radio waves with laser-probed atoms in a centimeter-scale glass cell and tune from about 100 kilohertz to terahertz frequencies. In published comparisons, conventional receivers still detect weaker signals in most bands.
The IESG asked for final comments on draft-ietf-tls-mlkem, an Informational specification for ML-KEM-only key agreement in TLS 1.3. Its three key-exchange groups are marked in the registry as items the IETF has not evaluated.
Twenty authors tied quantum chemistry and topological data analysis to Helios, Sol in 2027, Apollo in 2029, and Lumos in the 2030s. They called the roadmap an assumption-driven envelope, not a deterministic forecast.
Coordinated by LuxQuanta, the six-member QUARTERNEXT consortium plans 48 months of work on continuous-variable QKD equipment and intends to provide its hardware and software for testing at Nostradamus, the EU's QKD evaluation effort.
In measurement-device-independent QKD, an untrusted relay makes every measurement, so the detector attacks demonstrated on commercial systems no longer work. Researchers have still taken full keys through a flawed transmitter. Users also give up key rate.
The senator who moved third reading said there was "no direct discussion" of quantum threats at the committee level. Under a separate Treasury Board notice, federal departments must move high-priority systems to post-quantum cryptography by the end of 2031.
In a preprint, Cisco and UC Santa Barbara researchers reported 4% or less decoherence with slow switching and at least 90% fidelity at 1 MHz. Conversion between photon encodings has not yet been demonstrated.
The researchers placed both entanglement sources in one Brooklyn building and made the swap at a Manhattan data center. They reported measured rates above 0.65 swaps per second over deployed fiber, or more than 1.5 after a detector correction.
