Singapore-based quantum communications company SpeQtral has taken operational control of its SpeQtre satellite from UK mission partner Science and Technology Facilities Council’s (STFC) RAL Space, marking the start of the mission’s quantum experimentation phase.

The satellite was launched in November 2025 and has since been regularly tracked during passes over optical ground stations in Singapore and the United Kingdom. With SpeQtral now at the controls, engineers are working through the calibration process needed to establish precise optical links and prepare the satellite’s onboard entangled photon pair source for operation.

A technically demanding handover

Unlike conventional satellites that rely on radio frequency links, quantum communication satellites depend on optical links that demand far greater pointing precision between space and ground. The Centre for Quantum Technologies at the National University of Singapore operates the optical ground station in Singapore, while RAL Space runs the counterpart station at Chilbolton Observatory in the UK. Both sites have confirmed reception of the satellite’s beacon signal, with SpeQtre also receiving uplink beacons from the 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.”

Why quantum-safe communications matter now

The milestone lands as quantum-safe communications climbs the cybersecurity agenda. Forrester Research forecasts that practical quantum computing capable of breaking today’s encryption standards could arrive as early as 2030, well ahead of many earlier estimates. Security researchers have also warned that adversaries may already be harvesting encrypted data today with the intention of decrypting it once sufficiently powerful quantum computers become available — a tactic known as “harvest now, decrypt later”.

Satellite-based quantum key distribution (QKD) is seen as critical to extending quantum-secure communications over distances that terrestrial fibre networks cannot practically cover. The work now underway on SpeQtre is expected to generate the operational experience and technical data needed to support future space-to-ground systems, including the BBM92 QKD protocol, which uses entangled photon pairs to distribute encryption keys between space and ground.

Unlike conventional encryption, which relies on mathematical complexity that future quantum computers could eventually break, QKD uses the principles of quantum physics to distribute keys via very weak light signals, with final keys generated only from data that passes quantum security checks. SpeQtral positions the technology as especially relevant for information that must stay confidential for decades, including state secrets, medical records, legal documents, cross-border government communications and high-value financial transactions.

SpeQtral develops quantum-secure products and services designed to protect sovereign and enterprise telecommunications networks against both classical and future quantum-based attacks, combining terrestrial and space-based approaches to its network security offerings.