Developing Quantum Communications in space for the future EuroQCI

The European project QUDICE has been launched to develop components and subsystems for ultra-secure space-based quantum communication.

This last decade has witnessed an astonishing increase in the number of devices and systems connected to the global networks, sending information from one side of the world to the other. Consequently, huge volumes of sensitive information are being sent through the internet, and many are unaware of how easily data can be hacked and used for malicious intentions. Therefore, one of the major concerns nowadays is security.

Moreover, we are in urgent need to protect the sensitive information being transmitted in the most secure way possible, not only protecting ground-based in-fibre communications, but also free-space communications.

One of the most advanced cryptography techniques is the so-called Quantum Key Distribution (QKD), a promising solution to protect digital communications. Specifically, it guarantees security based on the laws of quantum mechanics rather than on the computation capability of a hacker. In order to extend this ultra-secure system at the European regional level, the most promising way is to include satellite system networks into the technological solutions under study.

The Project

Launched in January of 2023, QUDICE is a European project that focuses specifically on developing components and subsystems for space-based QKD. Notably, the successful completion of this project will signify a game changer in space-based communications. Indeed, it will permit a European network of satellites with quantum key distribution as the main service, thus enabling ultra-secure communications extended across the entire European region.

QUDICE, which stands for Quantum Devices and Subsystems for Communications in Space, gathers eleven partners (academic institutions, research organizations, and technology companies) from six European countries, experts in quantum technologies, in particular within the field of quantum communications. “The consortium has gained considerable experience from its precursor project Quango”, explains Giuseppe Vallone, Professor at the Dep. of Information Engineering of the University of Padova and Coordinator of the project. “In Quango we had the opportunity to develop pioneering quantum technological components and systems in the lab with a technology readiness level of 4 (TRL4), in which we were able to make individual components work together as a System. Now in QUDICE we will bring the devices from breadboard demonstrations in a lab (TRL4) to a space qualified engineering model (TRL6)”.


QUDICE is already in full motion with the objective of obtaining the first prototypes by the end of 2024 and testing them in 2025. In particular, QUDICE will develop two sources for QKD (one for discrete- and the other for continuous-variable encoding), a Quantum Random Number Generator, a satellite Pointing, Acquisition and Tracking system, an Entangled Photon Source, a 5G system for QKD post-processing support and 5G QKD-secured connectivity service, and simulations to assess the performance of the developed quantum satellite communications components.

The project will be a key player in enabling the realization of a European network of satellites with QKD as its main security protocol approach. 

The EuroQCI Initiative

Today, there is an ongoing worldwide race between competing regions of the globe towards leadership in quantum technologies. In this race, the European Commission is eager to not only drive but also integrate quantum technologies into the arena of telecom and network communications, ultimately in search of enabling an additional layer of security to our communications. Furthermore, it is actively working with all 27 EU Member States, as well as the European Space Agency (ESA), to not only design but also develop and deploy ultra-secure communications. This ambitious goal is being pursued through both terrestrial segments, which rely on fiber communications networks linking strategic sites at national and cross-border levels, and space segments, which are based on satellites.

As Vallone highlights enthusiastically, “the European Commission has launched the long-term initiative European Quantum Communications Infrastructure – EuroQCI that seeks to secure quantum communication infrastructure spanning the whole EU, including its overseas territories. As part of this ambitious plan, QUDICE will be an essential technological key component and will play an importantly decisive role in the future deployment of this massive infrastructure.” 

QUDICE Project


More Information

QUDICE Consortium 

The European consortium includes the following entities:  

  • Universities: University of Padova, Sorbonne University, University of Malta
  • Research Institutions: ICFO, Fraunhofer IOF
  • Companies: Stellar Project, Sateliot, ThinkQuantum, QUSIDE, Thales Alenia Space, and Argotec.


Link to the Quango project

Link to the European Commission project profile 

Sequential Rendevouz

Sequential Rendevouz, QUDICE Project

Entangled Photon Source Rendevouz

Entangled Photon Source Rendevouz, QUDICE Project