Madrid leads the development of quantum-safe communications through the MadQuantum-CM project

IMDEA Networks, 5TONIC, Telefónica, and Universidad Carlos III of Madrid, participate in the MADQuantum-CM project, with the aim of expanding MadQCI, the largest quantum communications network in Europe

04 March 2025

The Regional Government of Madrid is strengthening its commitment to quantum communications with an investment of 16 million euros in research projects on quantum communications and cybersecurity within the framework of the International Year of Quantum Science and Technologies declared by UNESCO. Among the initiatives the regional government is promoting stands out MadQuantum-CM, which aims to expand the largest quantum communications network in Europe, MadQCI, positioning itself as a strategic initiative for the development of secure quantum communications in Europe.

At IMDEA Networks, as one of the project participants, we lead the development of next-generation quantum communication protocols. ‘Our work is focused on creating solutions that extend the reach and functionality of quantum networks, ensuring their integration with current communications infrastructures’, explains Albert Banchs, IMDEA Networks’ principal researcher on the project.

Meanwhile, 5TONIC, the open research and innovation laboratory created by Telefónica and IMDEA Networks, plays a fundamental role together with the Universidad Carlos III of Madrid (UC3M), as a validation and testing centre of new technologies for the control of quantum communication networks. As such, a solution has been developed for secure end-to-end key distribution based on cloud native and QKD (quantum key distribution) technologies, which has been evaluated by means of a digital twin for QKD networks, also developed in the context of the project. This solution will be experimentally validated on a hybrid PQC/QKD (Post-Quantum cryptography/QKD) multi-domain testbed deployed in the 5TONIC laboratory. ‘Our facilities allow us to evaluate quantum communications protocols and equipment in real operating conditions, a crucial step for its future commercial implementation,’ explains Carlos J. Bernardos, vice-president of 5TONIC and full professor at UC3M.

With the purpose of extending the largest quantum communications network in Europe, the deployment of the MadQuantum-CM project relies on Telefónica’s fibre optic infrastructure, over which quantum key distribution (QKD) protocols are implemented. This combination of cutting-edge telecommunications infrastructure with quantum technology will guarantee inherently secure communications based on the principles of quantum mechanics.

The MadQuantum-CM consortium, coordinated by the Universidad Politécnica of Madrid, includes the participation of leading institutions such as the National Institute for Aerospace Technology, the Spanish Metrology Centre, the Fundación Vithas, the Universidad Autónoma of Madrid and the Universidad Complutense of Madrid. The project is funded by the European Union through NextGenerationEU funds, by the Community of Madrid and by the Recovery, Transformation and Resilience Plan (PRTR) in the framework of the Complementary Quantum Communication Plan, with a total investment of 73 million euros.

The project’s key objectives include the development of new, more efficient and secure quantum communication protocols, the integration of QKD technologies into conventional communications networks, the training of specialised researchers to boost the national industry, and the creation of use cases in critical sectors such as healthcare, energy and public services.

5TONIC, as a laboratory of reference in the development of 5G and 6G technologies, facilitating collaboration between academia and industry, also contributes to technological development in the field of quantum communications. ‘The synergy between the different ecosystem players, from operators such as Telefónica to research centres such as UC3M and IMDEA Networks, is fundamental to the success of the project,’ adds Bernardos.

The development of quantum communications has become a strategic priority for both Europe and Spain, with Madrid being a reference hub for the research and development of these fundamental technologies for the security of future communications. The collaboration between 5TONIC, Telefónica (which is deploying the MadQCI fibre network) and IMDEA Networks in the framework of MadQuantum-CM exemplifies the innovation model needed to lead this technological revolution.