Deployment across Melita’s operational fiber network demonstrates that quantum key distribution can protect real-world telecom systems, advancing Europe’s quantum-secure communication backbone.
Munich, Germany / Malta — 5 May 2026 — Terra Quantum, a global leader in quantum technology, together with Melita Business and Merqury Cybersecurity, a leading developer of quantum key management and quantum network control solutions, today announced the successful deployment of a Quantum Key Distribution (QKD) link connecting Melita’s two main data centers in Malta. The system enables the exchange of cryptographic keys secured by quantum technology across Melita’s live fiber network, demonstrating that quantum-secure communication can operate on existing telecommunications infrastructure.
The deployment represents an important milestone in bringing quantum security from research environments into operational telecom networks. Much like the transition from unencrypted to encrypted internet traffic in the early 2000s, quantum key distribution is poised to become the next foundational layer of security for global communications. As quantum computing advances, widely used public key encryption methods will become vulnerable, making quantum-secure communication increasingly important. Consequently, quantum-secure communication technologies are becoming critical for protecting telecom infrastructure, financial systems, and government networks.
Quantum security on existing telecom infrastructure
A key achievement of the deployment is that the QKD system operates over Melita’s existing lit fiber infrastructure using Dense Wavelength Division Multiplexing (DWDM). Unlike many experimental quantum communication systems that require dedicated dark fiber, this installation demonstrates that quantum-secure key exchange can operate within active telecom networks without any infrastructure modifications.
The system connected Melita’s primary data centers and enabled the secure exchange of cryptographic keys used to protect sensitive communications. By integrating Terra Quantum’s QKD technology with Merqury’s networking hardware and key management capabilities, the partners created a fully integrated quantum-secure networking solution. Terra Quantum’s proprietary QKD technology enables provably secure encryption for critical network infrastructure. It is a loss control-based system that delivers quantum-safe key exchange over optical fiber, including critical security components:
- Quantum Random Number Generator (QRNG) producing truly unpredictable cryptographic keys
- Optical Time-Domain Reflectometry (OTDR) to continuously monitor the fiber link and detect potential intrusion attempts
Together, these technologies enable provably secure encryption for critical digital infrastructure, ensuring that any attempt to intercept communications can be detected.
Demonstrating quantum networking in real-world conditions
During deployment, the partners successfully implemented Terra Quantum’s QKD technology on active telecom fiber infrastructure and integrated the system with Merqury’s key management system via a standards-aligned REST API.
The deployment has handled tens of thousands of key requests with zero unplanned client-impacting incidents, demonstrating stable operation in a live telco environment. These results validate the feasibility of integrating quantum security into live telecommunications networks and accelerate the transition toward commercial quantum-secure communication services.
“By successfully operating our quantum key distribution technology on a live telecom network, we are proving that quantum security can be integrated into existing infrastructure today, moving from research laboratories into real-world deployment. This represents a major step toward building the quantum-secure communication backbone Europe will rely on in the future.” said Markus Pflitsch, Founder and CEO of Terra Quantum.
Matthew Farrugia, Technical Head of Service Delivery & Data Centre at Melita, emphasized the importance of the project: “Ensuring the highest level of security for the connection between our data centers is essential. Quantum cryptography provides a powerful new layer of protection and allows us to detect any attempt to compromise the communication link.”
Noel Farrugia, Chief Technology Officer at Merqury Cybersecurity, added: “Quantum security only becomes useful when it can be deployed, controlled and monitored as any other system on a network. By integrating Terra Quantum’s QKD technology with Merqury’s quantum network management suite, we have shown that quantum-secure services can move beyond the lab and into real telecom operations.”
Toward Europe’s quantum-secure communication infrastructure
The successful deployment in Malta represents a significant step toward large-scale quantum networking and the realization of Europe’s future quantum-secure communication infrastructure. The program supports Europe’s efforts to establish a continent-wide quantum-secure communications network, ensuring long-term protection for critical data while strengthening Europe’s technological sovereignty.
