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.