en.Wedoany.com Reported - Recently, Spanish technology company Indra Group announced that it has completed the core deployment of the European EuroQCI research and development project within Spain and is leading the construction of the country's national quantum communication network. This network will subsequently connect to the European quantum communication infrastructure EuroQCI, targeting government agencies, finance, emergency response, critical infrastructure, and cross-border secure communication scenarios.
The core of this deployment is integrating quantum key distribution, post-quantum cryptography, and traditional encryption systems into a unified communication security framework. Indra is responsible for network architecture, critical infrastructure development, and application layer management in the project, while coordinating the validation of 14 application scenarios, advancing quantum communication from single-point technology demonstrations to industry trial phases. The Spanish network currently has nearly 30 nodes in Madrid, with a three-node ring network under construction in Barcelona, along with completed tests of some air links and interleaved distribution systems. For European digital infrastructure, the value of such networks lies in adding a new security layer for future highly sensitive data transmission, especially as quantum computing capabilities improve, traditional encryption systems may face greater cracking pressure, and critical communication links require the early introduction of evolvable security mechanisms.
In the project, Indra deployed two key fiber optic links: one connecting the Torrejón de Ardoz work center to the Quantum Technology Innovation Center within the Alcobendas headquarters, and another connecting this innovation center to the node at the Rector's Office of the Polytechnic University of Madrid.
Finance and emergency response are two representative application directions in this validation. The financial scenario tested encrypted financial data transmission, using a hybrid key scheme combining traditional cryptography, quantum key distribution, and post-quantum cryptography to enhance the security resilience of transactions, inter-institutional communications, and high-value business data transmission. The emergency response scenario verified the network's switching capability when critical links fail, with the system automatically switching from the primary quantum key distribution system to a backup system to ensure continuity of communication services. For urban governance, financial infrastructure, energy networks, data centers, and public service institutions, the large-scale deployment of quantum communication networks will depend on node deployment density, cross-regional interconnection capabilities, equipment costs, standard unification, and compatibility with existing communication systems.
Indra Space is also leading the IberianQCI project, responsible for building a key component of the European quantum communication network in the southwestern direction. This project will connect the infrastructure of Spain and Portugal through terrestrial and satellite communications. The terrestrial part plans to connect Vigo, Spain, with Valença, Portugal, while the space part will establish three optical stations in Madrid, Barcelona, and southern Portugal, linked to the ground network in Lisbon. As EuroQCI advances the coordinated construction of terrestrial fiber optic segments and satellite space segments, European quantum communication is moving from national pilot projects to cross-border interconnection. Spain's deployment provides a clearer engineering blueprint for subsequent applications in finance, public services, and critical infrastructure.
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