LuxQuanta News
The Spanish deep-tech company LuxQuanta has announced the successful completion of a proof of concept (PoC) certifying their NOVA LQ quantum cybersecurity system, marking a critical step forward for European quantum sovereignty. This validation, carried out as part of the MADQuantum-CM project, shows that quantum-safe communications are now a deployable reality for current urban fiber networks rather than just a lab experiment.
The trials were conducted using the Community of Madrid’s quantum communications infrastructure, or MADQCI, as part of the “MADQ Business Venture” program. The large-scale deployment of quantum key distribution (QKD) technology is made possible by LuxQuanta reproducible technical data, which replicates the unique operational restrictions of a real-world metropolitan network, such as traffic, noise, and fiber loss.
Breaking the 100km Barrier and Ensuring Coexistence
This proof of concept’s ability to demonstrate consistent quantum key distribution over up to 100 kilometers of standard single-mode optical fiber is among its most important accomplishments. Alongside traditional data, quantum signals are typically very brittle and challenging to send across long distances. Nonetheless, the Continuous-Variable Quantum Key Distribution (CV-QKD) technique from LuxQuanta has demonstrated its robustness.
Most importantly, the NOVA LQ system was able to fully cohabit on the same fiber with classical DWDM (Dense Wavelength Division Multiplexing) traffic. This implies that operators of data centers and telecommunications companies can safeguard their networks without spending money on costly “dark fiber” or specialized parallel infrastructure. Alternatively, businesses can include quantum security into their current active networks, which would significantly lower the complexity and deployment costs.
Scalable Architecture for Modern Cities
Scalability becomes the top need for infrastructure owners as metropolitan networks get more complicated. Multiple receivers are served by a single transmitter in point-to-multipoint arrangements, which were successfully tested by the MADQuantum Project.
When it comes to the economics of quantum security, this architectural innovation is revolutionary. Operators can speed up their time-to-integration and simplify their network designs by eliminating the requirement for hardware duplication at each node. NOVA LQ is therefore the best option for:
- Inter-data-centre links
- Government and critical infrastructure backbones
- Metropolitan fiber networks serving diverse commercial clients
Information-Theoretic Security Against Future Threats
The emergence of “Harvest now, decrypt later” assaults, in which malevolent actors intercept encrypted data now with the goal of decrypting it once large-scale quantum computers become available, is what makes this technology so urgent.
This is addressed by LuxQuanta’s NOVA LQ, which offers information-theoretic security by incorporating QKD at the physical layer. This security is independent of computational assumptions, in contrast to classical encryption, which depends on the mathematical difficulty of certain issues. It defends against both the sophisticated cyberthreats of today and the potential cryptographic dangers of quantum computing in the future.
(Note: The idea of information-theoretic security holds true even in the case of an attacker possessing infinite computing capacity. Although this information is widely known in the field of cryptography, the reference to independence from computational assumptions provides contextual support.
A Growing Global Footprint
For the Barcelona-based business, this triumphant PoC in Madrid is the most recent in a string of significant events. Big Sur Ventures and A&G led LuxQuanta’s €8 million Series A fundraising round in October 2025. The EIC Fund and other industry heavyweights like Corning and GTD also contributed.
Additionally, the business is growing its global footprint. LuxQuanta demonstrated a live demonstration of a quantum-safe network at the AWS Singapore Innovation Hub a few months ago, safeguarding data center infrastructure for use cases involving financial institutions.
Project Support and Vision
The European Union’s Next Generation EU and the Community of Madrid, Spain’s Recovery, Transformation, and Resilience Plan, the MADQuantum-CM project is a component of a larger European endeavor.
“The data generated in this PoC provides a concrete technical basis for operators and infrastructure owners evaluating scalable quantum-secure deployments on existing fiber networks,” said Vanesa Díaz, CEO of LuxQuanta, underscoring the significance of this technical evidence.
With this confirmation, LuxQuanta advances its goal of enabling global access to quantum security, benefiting critical infrastructure operators and governmental agencies who must safeguard their data from future attacks.
