USTC Demonstrates Quantum Position Verification With 75-Meter Accuracy Over 2 Kilometers of Fiber, Published in Nature Physics on September 3, 2026
Nature Physics carries the first complete demonstration of quantum position verification: two USTC verifier stations two kilometers apart confirmed a prover's location to better than 75 meters, with security resting on quantum physics and the speed of light. We read what the Hefei experiment establishes for position-based authentication in a period when roughly 1,500 flights a day meet GPS spoofing, and what still separates a laboratory fiber loop from a verification service a program office could buy.
CSIRO Delivers Two Entangled-Photon Quantum Light Sources to Australia's Defence Science and Technology Group for an Intended Tamper-Evident Ground-to-Satellite Timing Link
In July 2026 CSIRO delivered two portable entangled-photon Quantum Light Sources to Australia's Defence Science and Technology Group, source hardware intended for a future quantum time transfer link between ground stations and satellites. We read the delivery beside the holdover clocks and inertial sensors other programs are flying, and set out what still separates two delivered sources from an authenticated timing layer intended to help address GPS jamming and spoofing.