SpeQtral has taken operational control of the SpeQtre satellite from UK mission partner the Science and Technology Facilities Council’s RAL Space, marking the start of the mission’s quantum experimentation phase.
The satellite was launched last November and has since been regularly detected and tracked during passes over optical ground stations in Singapore, Chilbolton, and elsewhere, according to the company. The sites have confirmed reception of the satellite beacon signal, while the satellite has also received uplink beacons from the ground.
The mission relies on optical communications links rather than conventional radio frequency links. Optical links require tighter pointing precision, with lasers on the satellite and ground stations needing to be aligned more accurately than typical radio-based satellite communications. The Centre for Quantum Technologies at the National University of Singapore operates the optical ground station in Singapore, while RAL Space operates the station at Chilbolton Observatory in the United Kingdom.
SpeQtral said the work is aimed at advancing satellite-based quantum key distribution (QKD), which is being developed as a method for distributing encryption keys using quantum properties of light. Satellite-based approaches are being explored to support quantum-secure communications over distances that terrestrial fibre networks cannot practically cover.
The announcement comes amid growing attention on quantum-safe security, as advances in quantum computing raise concerns about the long-term viability of widely used public-key encryption methods. The release cited Forrester Research analysis forecasting that quantum computing capable of threatening today’s encryption could arrive as early as 2030, and noted warnings from security experts that adversaries may be collecting encrypted data now with the intention of decrypting it later as quantum capabilities mature.
With SpeQtral now operating the satellite, teams are working through calibration to establish and refine optical links to the precision required for quantum communications. SpeQtral said it is also preparing the satellite’s onboard entangled photon pair source for operations, including calibration to characterise and optimise its performance in space.
The experimentation phase is intended to generate operational experience and technical data to support future space-to-ground quantum communication systems, including the BBM92 QKD protocol, which uses entanglement between photon pairs to distribute encryption keys between space and ground.
“Establishing and refining optical links between SpeQtre and ground stations is a foundational step in progressing space-based quantum communications,” said Chune Yang Lum, co-founder and CEO of SpeQtral. “This is technically demanding work, and each stage gives us valuable operational learning as we continue to move quantum-secure communications closer to practical deployment.”
Unlike conventional encryption, which relies on mathematical complexity that future quantum computers could eventually break, QKD uses quantum physics to distribute encryption keys using weak light signals. Final keys are generated only from data that passes quantum security checks, according to the release.
The technology is typically positioned for use cases where data must remain confidential for long periods, including government communications, medical records, legal documents, financial transactions, and sensitive data centre or cloud infrastructure traffic.