September 16 2025 -- The Quantum Key Distribution Satellite (QKDSat) is a partnership project led by Honeywell that will demonstrate space-based technologies providing cryptographic solutions. The method consists of using photons to generate truly random encryption keys and distribute them from satellites to the relevant parties. If there is an attempt to intercept the data, the system detects the interference and shuts down the distribution of the keys immediately – making encryption keys secure against hackers . Since ground-based quantum key distribution (QKD) networks are limited over long distances, using satellites expands the reach and enhances security further.

The signature, which took place at the World Space Business Week in Paris on 16 September, is a continuation of last year’s partnership announcement. QKDSat will be used in demonstrations for different purposes; for example, telecommunications companies Colt Technology Services and Nokia will test it for the protection of their optical networks. It will be the first European QKD System via satellite providing pre-operational commercial secured service.

The formal agreement also follows a recent memorandum of understanding between Honeywell and Redwire, a Belgian company manufacturing QKDSat’s satellite. The two companies announced the aim to combine Redwire’s quantum platform technology with Honeywell’s quantum optical payload, creating a fully functional payload and platform by mid-2026 for civil and defence customers.

It is a project within ESA’s programme of Advanced Research in Telecommunications Systems (ARTES) with support from different National Space Agencies that brings together companies from  the UK, Belgium, Austria, Canada, Czechia and Switzerland.

“Innovative solutions to protect the critical infrastructures of our Member States from cyberattacks are needed now more than ever. That’s why I am delighted to have officially marked a key milestone in our partnership with Honeywell that will initiate the delivery phase of QKDSat,” said Laurent Jaffart, ESA Director of Connectivity and Secure Communications. “QKDSat aims to make use of quantum key distribution to ensure that any attempts to intercept data are resisted – particularly at locations where it’s needed most such as governmental institutions, banks, and hospitals.”

“The QKDSat Partnership Project represents a major step forward in securing Europe’s critical infrastructure against increasingly sophisticated cyber threats,” said Lisa Napolitano, Vice President at GM Honeywell Space. “Working closely with ESA and our international project partners, we are demonstrating the power of collaboration to protect modern society, while enabling a new era of secure communications.”

In a world where data is equivalent to currency, securing it has become more important than ever. Access and manipulation of data through cyberthreats can compromise large financial transactions and access to essential supplies such as power and water. The signature between ESA and Honeywell marks a step closer towards boosting Europe’s autonomy in cybersecurity.