LuxQuanta News: MADQuantum Shows NOVA LQ QKD System
LuxQuanta News
LuxQuanta, a Spanish deep-tech company, completed a proof of concept (PoC) for its NOVA LQ quantum cybersecurity system, advancing European quantum sovereignty. This confirmation by the MADQuantum-CM project proves that quantum-safe communications are now deployable for urban fiber networks, not just lab experiments.
The “MADQ Business Venture” program used MADQCI, the Community of Madrid's quantum communications infrastructure, for the experiments. LuxQuanta repeatable technical data replicates the unique operational constraints of a metropolitan network, such as traffic, noise, and fiber loss, enabling large-scale quantum key distribution (QKD) deployment.
Getting Past 100km and Living Together
One of this proof of concept's biggest achievements is constant quantum key distribution over 100 kilometers of standard single-mode optical fiber. Quantum signals, like regular data, are brittle and difficult to convey great distances. Yet LuxQuanta's CV-QKD method has proven reliable.
NOVA LQ could fully coexist on the same fiber with classical DWDM traffic, which was most crucial. This means data center and telecom operators can protect their networks without investing money on “dark fiber” or parallel infrastructure. Businesses can also add quantum security to their active networks, reducing complexity and deployment costs.
Scalable Modern City Architecture
Scalability becomes infrastructure owners' key priority as metropolitan networks become increasingly complex. One transmitter serves several receivers in point-to-multipoint configurations, which the MADQuantum Project examined.
This architectural breakthrough revolutionizes quantum security economics. By minimizing node hardware duplication, operators can save integration time and simplify network designs. Thus, NOVA LQ is perfect for:
Connections between data centers
Government and vital infrastructure Metropolitan fiber networks serve varied commercial clients Information-Theoretic Future Threat Security This technique is urgent because of “Harvest now, decrypt later” attacks, in which malicious actors intercept encrypted data today to decrypt it when large-scale quantum computers are accessible.
NOVA LQ from LuxQuanta provides information-theoretic security by combining QKD at the physical layer. Computational assumptions do not affect this security, unlike classical encryption, which depends on mathematical difficulty. It protects against advanced cyberthreats and future quantum computing cryptography threats.
Information-theoretic security applies even to attackers with infinite computational power. The remark to independence from computational assumptions contextualizes this cryptography knowledge.
Expanding Global Footprint
This Madrid PoC victory is the latest major event for Barcelona-based firm. Big Sur Ventures and A&G led LuxQuanta's €8 million Series A in October 2025. EIC Fund, Corning, and GTD also contributed.
Additionally, the company is expanding globally. LuxQuanta showed a quantum-safe network at the AWS Singapore Innovation Hub a few months ago, protecting financial institution data center infrastructure.
Vision and Project Support
The MADQuantum-CM project is part of the EU's Next Generation EU and Spain's Recovery, Transformation, and Resilience Plan.
The PoC data provides a solid foundation for operators and infrastructure owners to evaluate quantum-secure deployments on existing fiber networks, according to LuxQuanta CEO Vanesa Díaz.
With this validation, LuxQuanta advances its objective of worldwide quantum security for critical infrastructure operators and government organizations who must protect their data from attackers.
